* [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional
@ 2023-12-05 10:36 Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 01/16] KVM: x86: xen: Remove unneeded xen context from struct kvm_arch when !CONFIG_KVM_XEN Vitaly Kuznetsov
` (16 more replies)
0 siblings, 17 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
v1:
https://lore.kernel.org/kvm/20231025152406.1879274-1-vkuznets@redhat.com/
Changes since RFC:
- "KVM: x86: hyper-v: Split off nested_evmcs_handle_vmclear()" patch added
[Sean]
- "KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h" patch added [Sean]
- Use evmptr_is_set()/nested_vmx_is_evmptr12_set() helpers instead of
nested_vmx_evmptr12() [Sean]
- Move "#ifdef CONFIG_KVM_HYPERV" inside certain functions instead of
adding stubs for !CONFIG_KVM_HYPERV case [Sean]
- Minor code re-shuffling [Sean]
- Collect R-b tags [Max]
KVM supports emulating Microsoft Hyper-V as well as running as a nested
(L1) hypervisor on top of Hyper-V whileusing Hyper-V specific PV features.
Support for the later is only compiled in when CONFIG_HYPERV is set. This
series makes it possible to disable the former with a newly introduced
CONFIG_KVM_HYPERV option. This helps to reduce sized of KVM modules as well
as the attack surface for some specific deployments when no Windows/Hyper-V
guests are expected. The size gain is significant:
# CONFIG_KVM_HYPERV is not set
# CONFIG_HYPERV is not set
-rw-r--r--. 1 user user 3612632 Oct 10 16:53 arch/x86/kvm/kvm-amd.ko
-rw-r--r--. 1 user user 5343968 Oct 10 16:53 arch/x86/kvm/kvm-intel.ko
CONFIG_KVM_HYPERV=y
# CONFIG_HYPERV is not set
-rw-r--r--. 1 user user 3925704 Oct 10 16:51 arch/x86/kvm/kvm-amd.ko
-rw-r--r--. 1 user user 5819192 Oct 10 16:51 arch/x86/kvm/kvm-intel.ko
# CONFIG_KVM_HYPERV is not set
CONFIG_HYPERV=m
-rw-r--r--. 1 user user 3928440 Oct 10 16:40 arch/x86/kvm/kvm-amd.ko
-rw-r--r--. 1 user user 8156464 Oct 10 16:40 arch/x86/kvm/kvm-intel.ko
CONFIG_KVM_HYPERV=y
CONFIG_HYPERV=m
-rw-r--r--. 1 user user 4245440 Oct 10 16:37 arch/x86/kvm/kvm-amd.ko
-rw-r--r--. 1 user user 8583872 Oct 10 16:37 arch/x86/kvm/kvm-intel.ko
The series is not supposed to introduce any functional change for the
"CONFIG_KVM_HYPERV=y && CONFIG_HYPERV=m/y" case. Tested with KVM selftests,
kvm-unit-tests and real Windows guests on VMX and SVM. Note, kvm-unit-tests
have to be updated to not fail miserably when CONFIG_KVM_HYPERV is not set:
https://lore.kernel.org/kvm/20231025152915.1879661-1-vkuznets@redhat.com/
Vitaly Kuznetsov (16):
KVM: x86: xen: Remove unneeded xen context from struct kvm_arch when
!CONFIG_KVM_XEN
KVM: x86: hyper-v: Move Hyper-V partition assist page out of Hyper-V
emulation context
KVM: VMX: Split off vmx_onhyperv.{ch} from hyperv.{ch}
KVM: x86: hyper-v: Introduce kvm_hv_synic_auto_eoi_set()
KVM: x86: hyper-v: Introduce kvm_hv_synic_has_vector()
KVM: VMX: Split off hyperv_evmcs.{ch}
KVM: x86: hyper-v: Introduce kvm_hv_nested_transtion_tlb_flush()
helper
KVM: x86: hyper-v: Split off nested_evmcs_handle_vmclear()
KVM: selftests: Make all Hyper-V tests explicitly dependent on Hyper-V
emulation support in KVM
KVM: selftests: Fix vmxon_pa == vmcs12_pa == -1ull
vmx_set_nested_state_test for !eVMCS case
KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h
KVM: x86: Make Hyper-V emulation optional
KVM: nVMX: hyper-v: Introduce nested_vmx_is_evmptr12_{valid,set}()
helpers
KVM: nVMX: hyper-v: Introduce nested_vmx_evmcs() accessor
KVM: nVMX: hyper-v: Hide more stuff under CONFIG_KVM_HYPERV
KVM: nSVM: hyper-v: Hide more stuff under
CONFIG_KVM_HYPERV/CONFIG_HYPERV
arch/x86/include/asm/kvm_host.h | 13 +-
arch/x86/kvm/Kconfig | 14 +
arch/x86/kvm/Makefile | 16 +-
arch/x86/kvm/cpuid.c | 6 +
arch/x86/kvm/hyperv.h | 83 +++-
arch/x86/kvm/irq.c | 2 +
arch/x86/kvm/irq_comm.c | 9 +-
arch/x86/kvm/kvm_onhyperv.h | 20 +
arch/x86/kvm/lapic.c | 5 +-
arch/x86/kvm/svm/hyperv.h | 9 +
arch/x86/kvm/svm/nested.c | 30 +-
arch/x86/kvm/svm/svm.h | 2 +
arch/x86/kvm/svm/svm_onhyperv.c | 10 +-
arch/x86/kvm/vmx/hyperv.c | 447 ------------------
arch/x86/kvm/vmx/hyperv.h | 204 ++------
arch/x86/kvm/vmx/hyperv_evmcs.c | 315 ++++++++++++
arch/x86/kvm/vmx/hyperv_evmcs.h | 166 +++++++
arch/x86/kvm/vmx/nested.c | 149 +++---
arch/x86/kvm/vmx/nested.h | 3 +-
arch/x86/kvm/vmx/vmx.c | 20 +-
arch/x86/kvm/vmx/vmx.h | 12 +-
arch/x86/kvm/vmx/vmx_onhyperv.c | 36 ++
arch/x86/kvm/vmx/vmx_onhyperv.h | 125 +++++
arch/x86/kvm/vmx/vmx_ops.h | 2 +-
arch/x86/kvm/x86.c | 66 ++-
.../selftests/kvm/x86_64/hyperv_clock.c | 2 +
.../selftests/kvm/x86_64/hyperv_evmcs.c | 5 +-
.../kvm/x86_64/hyperv_extended_hypercalls.c | 2 +
.../selftests/kvm/x86_64/hyperv_features.c | 2 +
.../testing/selftests/kvm/x86_64/hyperv_ipi.c | 2 +
.../selftests/kvm/x86_64/hyperv_svm_test.c | 1 +
.../selftests/kvm/x86_64/hyperv_tlb_flush.c | 2 +
.../kvm/x86_64/vmx_set_nested_state_test.c | 16 +-
33 files changed, 1054 insertions(+), 742 deletions(-)
create mode 100644 arch/x86/kvm/vmx/hyperv_evmcs.c
create mode 100644 arch/x86/kvm/vmx/hyperv_evmcs.h
create mode 100644 arch/x86/kvm/vmx/vmx_onhyperv.c
create mode 100644 arch/x86/kvm/vmx/vmx_onhyperv.h
--
2.43.0
^ permalink raw reply [flat|nested] 25+ messages in thread
* [PATCH v2 01/16] KVM: x86: xen: Remove unneeded xen context from struct kvm_arch when !CONFIG_KVM_XEN
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 02/16] KVM: x86: hyper-v: Move Hyper-V partition assist page out of Hyper-V emulation context Vitaly Kuznetsov
` (15 subsequent siblings)
16 siblings, 0 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
Saving a few bytes of memory per KVM VM is certainly great but what's more
important is the ability to see where the code accesses Xen emulation
context while CONFIG_KVM_XEN is not enabled. Currently, kvm_cpu_get_extint()
is the only such place and it is harmless: kvm_xen_has_interrupt() always
returns '0' when !CONFIG_KVM_XEN.
No functional change intended.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/include/asm/kvm_host.h | 5 +++++
arch/x86/kvm/irq.c | 2 ++
2 files changed, 7 insertions(+)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index a565a2e70f30..ecf11b963382 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1136,6 +1136,7 @@ struct msr_bitmap_range {
unsigned long *bitmap;
};
+#ifdef CONFIG_KVM_XEN
/* Xen emulation context */
struct kvm_xen {
struct mutex xen_lock;
@@ -1147,6 +1148,7 @@ struct kvm_xen {
struct idr evtchn_ports;
unsigned long poll_mask[BITS_TO_LONGS(KVM_MAX_VCPUS)];
};
+#endif
enum kvm_irqchip_mode {
KVM_IRQCHIP_NONE,
@@ -1349,7 +1351,10 @@ struct kvm_arch {
struct hlist_head mask_notifier_list;
struct kvm_hv hyperv;
+
+#ifdef CONFIG_KVM_XEN
struct kvm_xen xen;
+#endif
bool backwards_tsc_observed;
bool boot_vcpu_runs_old_kvmclock;
diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c
index b2c397dd2bc6..ad9ca8a60144 100644
--- a/arch/x86/kvm/irq.c
+++ b/arch/x86/kvm/irq.c
@@ -118,8 +118,10 @@ static int kvm_cpu_get_extint(struct kvm_vcpu *v)
if (!lapic_in_kernel(v))
return v->arch.interrupt.nr;
+#ifdef CONFIG_KVM_XEN
if (kvm_xen_has_interrupt(v))
return v->kvm->arch.xen.upcall_vector;
+#endif
if (irqchip_split(v->kvm)) {
int vector = v->arch.pending_external_vector;
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 02/16] KVM: x86: hyper-v: Move Hyper-V partition assist page out of Hyper-V emulation context
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 01/16] KVM: x86: xen: Remove unneeded xen context from struct kvm_arch when !CONFIG_KVM_XEN Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 03/16] KVM: VMX: Split off vmx_onhyperv.{ch} from hyperv.{ch} Vitaly Kuznetsov
` (14 subsequent siblings)
16 siblings, 0 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
Hyper-V partition assist page is used when KVM runs on top of Hyper-V and
is not used for Windows/Hyper-V guests on KVM, this means that 'hv_pa_pg'
placement in 'struct kvm_hv' is unfortunate. As a preparation to making
Hyper-V emulation optional, move 'hv_pa_pg' to 'struct kvm_arch' and put it
under CONFIG_HYPERV.
While on it, introduce hv_get_partition_assist_page() helper to allocate
partition assist page. Move the comment explaining why we use a single page
for all vCPUs from VMX and expand it a bit.
No functional change intended.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/kvm/kvm_onhyperv.h | 20 ++++++++++++++++++++
arch/x86/kvm/svm/svm_onhyperv.c | 10 +++-------
arch/x86/kvm/vmx/vmx.c | 14 +++-----------
arch/x86/kvm/x86.c | 4 +++-
5 files changed, 30 insertions(+), 20 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index ecf11b963382..9dab2f7de495 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1125,7 +1125,6 @@ struct kvm_hv {
*/
unsigned int synic_auto_eoi_used;
- struct hv_partition_assist_pg *hv_pa_pg;
struct kvm_hv_syndbg hv_syndbg;
};
@@ -1447,6 +1446,7 @@ struct kvm_arch {
#if IS_ENABLED(CONFIG_HYPERV)
hpa_t hv_root_tdp;
spinlock_t hv_root_tdp_lock;
+ struct hv_partition_assist_pg *hv_pa_pg;
#endif
/*
* VM-scope maximum vCPU ID. Used to determine the size of structures
diff --git a/arch/x86/kvm/kvm_onhyperv.h b/arch/x86/kvm/kvm_onhyperv.h
index f9ca3e7432b2..eefab3dc8498 100644
--- a/arch/x86/kvm/kvm_onhyperv.h
+++ b/arch/x86/kvm/kvm_onhyperv.h
@@ -10,6 +10,26 @@
int hv_flush_remote_tlbs_range(struct kvm *kvm, gfn_t gfn, gfn_t nr_pages);
int hv_flush_remote_tlbs(struct kvm *kvm);
void hv_track_root_tdp(struct kvm_vcpu *vcpu, hpa_t root_tdp);
+static inline hpa_t hv_get_partition_assist_page(struct kvm_vcpu *vcpu)
+{
+ /*
+ * Partition assist page is something which Hyper-V running in L0
+ * requires from KVM running in L1 before direct TLB flush for L2
+ * guests can be enabled. KVM doesn't currently use the page but to
+ * comply with TLFS it still needs to be allocated. For now, this
+ * is a single page shared among all vCPUs.
+ */
+ struct hv_partition_assist_pg **p_hv_pa_pg =
+ &vcpu->kvm->arch.hv_pa_pg;
+
+ if (!*p_hv_pa_pg)
+ *p_hv_pa_pg = kzalloc(PAGE_SIZE, GFP_KERNEL_ACCOUNT);
+
+ if (!*p_hv_pa_pg)
+ return INVALID_PAGE;
+
+ return __pa(*p_hv_pa_pg);
+}
#else /* !CONFIG_HYPERV */
static inline int hv_flush_remote_tlbs(struct kvm *kvm)
{
diff --git a/arch/x86/kvm/svm/svm_onhyperv.c b/arch/x86/kvm/svm/svm_onhyperv.c
index 7af8422d3382..3971b3ea5d04 100644
--- a/arch/x86/kvm/svm/svm_onhyperv.c
+++ b/arch/x86/kvm/svm/svm_onhyperv.c
@@ -18,18 +18,14 @@
int svm_hv_enable_l2_tlb_flush(struct kvm_vcpu *vcpu)
{
struct hv_vmcb_enlightenments *hve;
- struct hv_partition_assist_pg **p_hv_pa_pg =
- &to_kvm_hv(vcpu->kvm)->hv_pa_pg;
+ hpa_t partition_assist_page = hv_get_partition_assist_page(vcpu);
- if (!*p_hv_pa_pg)
- *p_hv_pa_pg = kzalloc(PAGE_SIZE, GFP_KERNEL);
-
- if (!*p_hv_pa_pg)
+ if (partition_assist_page == INVALID_PAGE)
return -ENOMEM;
hve = &to_svm(vcpu)->vmcb->control.hv_enlightenments;
- hve->partition_assist_page = __pa(*p_hv_pa_pg);
+ hve->partition_assist_page = partition_assist_page;
hve->hv_vm_id = (unsigned long)vcpu->kvm;
if (!hve->hv_enlightenments_control.nested_flush_hypercall) {
hve->hv_enlightenments_control.nested_flush_hypercall = 1;
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 40e3780d73ae..cf19a3346639 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -523,22 +523,14 @@ module_param(enlightened_vmcs, bool, 0444);
static int hv_enable_l2_tlb_flush(struct kvm_vcpu *vcpu)
{
struct hv_enlightened_vmcs *evmcs;
- struct hv_partition_assist_pg **p_hv_pa_pg =
- &to_kvm_hv(vcpu->kvm)->hv_pa_pg;
- /*
- * Synthetic VM-Exit is not enabled in current code and so All
- * evmcs in singe VM shares same assist page.
- */
- if (!*p_hv_pa_pg)
- *p_hv_pa_pg = kzalloc(PAGE_SIZE, GFP_KERNEL_ACCOUNT);
+ hpa_t partition_assist_page = hv_get_partition_assist_page(vcpu);
- if (!*p_hv_pa_pg)
+ if (partition_assist_page == INVALID_PAGE)
return -ENOMEM;
evmcs = (struct hv_enlightened_vmcs *)to_vmx(vcpu)->loaded_vmcs->vmcs;
- evmcs->partition_assist_page =
- __pa(*p_hv_pa_pg);
+ evmcs->partition_assist_page = partition_assist_page;
evmcs->hv_vm_id = (unsigned long)vcpu->kvm;
evmcs->hv_enlightenments_control.nested_flush_hypercall = 1;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6d0772b47041..81224b9676d9 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -12438,7 +12438,9 @@ void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu)
void kvm_arch_free_vm(struct kvm *kvm)
{
- kfree(to_kvm_hv(kvm)->hv_pa_pg);
+#if IS_ENABLED(CONFIG_HYPERV)
+ kfree(kvm->arch.hv_pa_pg);
+#endif
__kvm_arch_free_vm(kvm);
}
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 03/16] KVM: VMX: Split off vmx_onhyperv.{ch} from hyperv.{ch}
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 01/16] KVM: x86: xen: Remove unneeded xen context from struct kvm_arch when !CONFIG_KVM_XEN Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 02/16] KVM: x86: hyper-v: Move Hyper-V partition assist page out of Hyper-V emulation context Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 04/16] KVM: x86: hyper-v: Introduce kvm_hv_synic_auto_eoi_set() Vitaly Kuznetsov
` (13 subsequent siblings)
16 siblings, 0 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
hyperv.{ch} is currently a mix of stuff which is needed by both Hyper-V on
KVM and KVM on Hyper-V. As a preparation to making Hyper-V emulation
optional, put KVM-on-Hyper-V specific code into dedicated files.
No functional change intended.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/Makefile | 4 +
arch/x86/kvm/vmx/hyperv.c | 139 --------------------
arch/x86/kvm/vmx/hyperv.h | 217 ++++++++++++++++----------------
arch/x86/kvm/vmx/vmx.c | 1 +
arch/x86/kvm/vmx/vmx_onhyperv.c | 36 ++++++
arch/x86/kvm/vmx/vmx_onhyperv.h | 124 ++++++++++++++++++
arch/x86/kvm/vmx/vmx_ops.h | 2 +-
7 files changed, 271 insertions(+), 252 deletions(-)
create mode 100644 arch/x86/kvm/vmx/vmx_onhyperv.c
create mode 100644 arch/x86/kvm/vmx/vmx_onhyperv.h
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index 80e3fe184d17..a99ffc3f3a3f 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -26,6 +26,10 @@ kvm-intel-y += vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o vmx/vmcs12.o \
vmx/hyperv.o vmx/nested.o vmx/posted_intr.o
kvm-intel-$(CONFIG_X86_SGX_KVM) += vmx/sgx.o
+ifdef CONFIG_HYPERV
+kvm-intel-y += vmx/vmx_onhyperv.o
+endif
+
kvm-amd-y += svm/svm.o svm/vmenter.o svm/pmu.o svm/nested.o svm/avic.o \
svm/sev.o svm/hyperv.o
diff --git a/arch/x86/kvm/vmx/hyperv.c b/arch/x86/kvm/vmx/hyperv.c
index 313b8bb5b8a7..de13dc14fe1d 100644
--- a/arch/x86/kvm/vmx/hyperv.c
+++ b/arch/x86/kvm/vmx/hyperv.c
@@ -13,111 +13,6 @@
#define CC KVM_NESTED_VMENTER_CONSISTENCY_CHECK
-/*
- * Enlightened VMCSv1 doesn't support these:
- *
- * POSTED_INTR_NV = 0x00000002,
- * GUEST_INTR_STATUS = 0x00000810,
- * APIC_ACCESS_ADDR = 0x00002014,
- * POSTED_INTR_DESC_ADDR = 0x00002016,
- * EOI_EXIT_BITMAP0 = 0x0000201c,
- * EOI_EXIT_BITMAP1 = 0x0000201e,
- * EOI_EXIT_BITMAP2 = 0x00002020,
- * EOI_EXIT_BITMAP3 = 0x00002022,
- * GUEST_PML_INDEX = 0x00000812,
- * PML_ADDRESS = 0x0000200e,
- * VM_FUNCTION_CONTROL = 0x00002018,
- * EPTP_LIST_ADDRESS = 0x00002024,
- * VMREAD_BITMAP = 0x00002026,
- * VMWRITE_BITMAP = 0x00002028,
- *
- * TSC_MULTIPLIER = 0x00002032,
- * PLE_GAP = 0x00004020,
- * PLE_WINDOW = 0x00004022,
- * VMX_PREEMPTION_TIMER_VALUE = 0x0000482E,
- *
- * Currently unsupported in KVM:
- * GUEST_IA32_RTIT_CTL = 0x00002814,
- */
-#define EVMCS1_SUPPORTED_PINCTRL \
- (PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR | \
- PIN_BASED_EXT_INTR_MASK | \
- PIN_BASED_NMI_EXITING | \
- PIN_BASED_VIRTUAL_NMIS)
-
-#define EVMCS1_SUPPORTED_EXEC_CTRL \
- (CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR | \
- CPU_BASED_HLT_EXITING | \
- CPU_BASED_CR3_LOAD_EXITING | \
- CPU_BASED_CR3_STORE_EXITING | \
- CPU_BASED_UNCOND_IO_EXITING | \
- CPU_BASED_MOV_DR_EXITING | \
- CPU_BASED_USE_TSC_OFFSETTING | \
- CPU_BASED_MWAIT_EXITING | \
- CPU_BASED_MONITOR_EXITING | \
- CPU_BASED_INVLPG_EXITING | \
- CPU_BASED_RDPMC_EXITING | \
- CPU_BASED_INTR_WINDOW_EXITING | \
- CPU_BASED_CR8_LOAD_EXITING | \
- CPU_BASED_CR8_STORE_EXITING | \
- CPU_BASED_RDTSC_EXITING | \
- CPU_BASED_TPR_SHADOW | \
- CPU_BASED_USE_IO_BITMAPS | \
- CPU_BASED_MONITOR_TRAP_FLAG | \
- CPU_BASED_USE_MSR_BITMAPS | \
- CPU_BASED_NMI_WINDOW_EXITING | \
- CPU_BASED_PAUSE_EXITING | \
- CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)
-
-#define EVMCS1_SUPPORTED_2NDEXEC \
- (SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | \
- SECONDARY_EXEC_WBINVD_EXITING | \
- SECONDARY_EXEC_ENABLE_VPID | \
- SECONDARY_EXEC_ENABLE_EPT | \
- SECONDARY_EXEC_UNRESTRICTED_GUEST | \
- SECONDARY_EXEC_DESC | \
- SECONDARY_EXEC_ENABLE_RDTSCP | \
- SECONDARY_EXEC_ENABLE_INVPCID | \
- SECONDARY_EXEC_ENABLE_XSAVES | \
- SECONDARY_EXEC_RDSEED_EXITING | \
- SECONDARY_EXEC_RDRAND_EXITING | \
- SECONDARY_EXEC_TSC_SCALING | \
- SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE | \
- SECONDARY_EXEC_PT_USE_GPA | \
- SECONDARY_EXEC_PT_CONCEAL_VMX | \
- SECONDARY_EXEC_BUS_LOCK_DETECTION | \
- SECONDARY_EXEC_NOTIFY_VM_EXITING | \
- SECONDARY_EXEC_ENCLS_EXITING)
-
-#define EVMCS1_SUPPORTED_3RDEXEC (0ULL)
-
-#define EVMCS1_SUPPORTED_VMEXIT_CTRL \
- (VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR | \
- VM_EXIT_SAVE_DEBUG_CONTROLS | \
- VM_EXIT_ACK_INTR_ON_EXIT | \
- VM_EXIT_HOST_ADDR_SPACE_SIZE | \
- VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL | \
- VM_EXIT_SAVE_IA32_PAT | \
- VM_EXIT_LOAD_IA32_PAT | \
- VM_EXIT_SAVE_IA32_EFER | \
- VM_EXIT_LOAD_IA32_EFER | \
- VM_EXIT_CLEAR_BNDCFGS | \
- VM_EXIT_PT_CONCEAL_PIP | \
- VM_EXIT_CLEAR_IA32_RTIT_CTL)
-
-#define EVMCS1_SUPPORTED_VMENTRY_CTRL \
- (VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR | \
- VM_ENTRY_LOAD_DEBUG_CONTROLS | \
- VM_ENTRY_IA32E_MODE | \
- VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL | \
- VM_ENTRY_LOAD_IA32_PAT | \
- VM_ENTRY_LOAD_IA32_EFER | \
- VM_ENTRY_LOAD_BNDCFGS | \
- VM_ENTRY_PT_CONCEAL_PIP | \
- VM_ENTRY_LOAD_IA32_RTIT_CTL)
-
-#define EVMCS1_SUPPORTED_VMFUNC (0)
-
#define EVMCS1_OFFSET(x) offsetof(struct hv_enlightened_vmcs, x)
#define EVMCS1_FIELD(number, name, clean_field)[ROL16(number, 6)] = \
{EVMCS1_OFFSET(name), clean_field}
@@ -608,40 +503,6 @@ int nested_evmcs_check_controls(struct vmcs12 *vmcs12)
return 0;
}
-#if IS_ENABLED(CONFIG_HYPERV)
-DEFINE_STATIC_KEY_FALSE(__kvm_is_using_evmcs);
-
-/*
- * KVM on Hyper-V always uses the latest known eVMCSv1 revision, the assumption
- * is: in case a feature has corresponding fields in eVMCS described and it was
- * exposed in VMX feature MSRs, KVM is free to use it. Warn if KVM meets a
- * feature which has no corresponding eVMCS field, this likely means that KVM
- * needs to be updated.
- */
-#define evmcs_check_vmcs_conf(field, ctrl) \
- do { \
- typeof(vmcs_conf->field) unsupported; \
- \
- unsupported = vmcs_conf->field & ~EVMCS1_SUPPORTED_ ## ctrl; \
- if (unsupported) { \
- pr_warn_once(#field " unsupported with eVMCS: 0x%llx\n",\
- (u64)unsupported); \
- vmcs_conf->field &= EVMCS1_SUPPORTED_ ## ctrl; \
- } \
- } \
- while (0)
-
-void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf)
-{
- evmcs_check_vmcs_conf(cpu_based_exec_ctrl, EXEC_CTRL);
- evmcs_check_vmcs_conf(pin_based_exec_ctrl, PINCTRL);
- evmcs_check_vmcs_conf(cpu_based_2nd_exec_ctrl, 2NDEXEC);
- evmcs_check_vmcs_conf(cpu_based_3rd_exec_ctrl, 3RDEXEC);
- evmcs_check_vmcs_conf(vmentry_ctrl, VMENTRY_CTRL);
- evmcs_check_vmcs_conf(vmexit_ctrl, VMEXIT_CTRL);
-}
-#endif
-
int nested_enable_evmcs(struct kvm_vcpu *vcpu,
uint16_t *vmcs_version)
{
diff --git a/arch/x86/kvm/vmx/hyperv.h b/arch/x86/kvm/vmx/hyperv.h
index 9623fe1651c4..9401dbfaea7c 100644
--- a/arch/x86/kvm/vmx/hyperv.h
+++ b/arch/x86/kvm/vmx/hyperv.h
@@ -14,12 +14,113 @@
#include "vmcs.h"
#include "vmcs12.h"
-struct vmcs_config;
-
-#define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs))
-
#define KVM_EVMCS_VERSION 1
+/*
+ * Enlightened VMCSv1 doesn't support these:
+ *
+ * POSTED_INTR_NV = 0x00000002,
+ * GUEST_INTR_STATUS = 0x00000810,
+ * APIC_ACCESS_ADDR = 0x00002014,
+ * POSTED_INTR_DESC_ADDR = 0x00002016,
+ * EOI_EXIT_BITMAP0 = 0x0000201c,
+ * EOI_EXIT_BITMAP1 = 0x0000201e,
+ * EOI_EXIT_BITMAP2 = 0x00002020,
+ * EOI_EXIT_BITMAP3 = 0x00002022,
+ * GUEST_PML_INDEX = 0x00000812,
+ * PML_ADDRESS = 0x0000200e,
+ * VM_FUNCTION_CONTROL = 0x00002018,
+ * EPTP_LIST_ADDRESS = 0x00002024,
+ * VMREAD_BITMAP = 0x00002026,
+ * VMWRITE_BITMAP = 0x00002028,
+ *
+ * TSC_MULTIPLIER = 0x00002032,
+ * PLE_GAP = 0x00004020,
+ * PLE_WINDOW = 0x00004022,
+ * VMX_PREEMPTION_TIMER_VALUE = 0x0000482E,
+ *
+ * Currently unsupported in KVM:
+ * GUEST_IA32_RTIT_CTL = 0x00002814,
+ */
+#define EVMCS1_SUPPORTED_PINCTRL \
+ (PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR | \
+ PIN_BASED_EXT_INTR_MASK | \
+ PIN_BASED_NMI_EXITING | \
+ PIN_BASED_VIRTUAL_NMIS)
+
+#define EVMCS1_SUPPORTED_EXEC_CTRL \
+ (CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR | \
+ CPU_BASED_HLT_EXITING | \
+ CPU_BASED_CR3_LOAD_EXITING | \
+ CPU_BASED_CR3_STORE_EXITING | \
+ CPU_BASED_UNCOND_IO_EXITING | \
+ CPU_BASED_MOV_DR_EXITING | \
+ CPU_BASED_USE_TSC_OFFSETTING | \
+ CPU_BASED_MWAIT_EXITING | \
+ CPU_BASED_MONITOR_EXITING | \
+ CPU_BASED_INVLPG_EXITING | \
+ CPU_BASED_RDPMC_EXITING | \
+ CPU_BASED_INTR_WINDOW_EXITING | \
+ CPU_BASED_CR8_LOAD_EXITING | \
+ CPU_BASED_CR8_STORE_EXITING | \
+ CPU_BASED_RDTSC_EXITING | \
+ CPU_BASED_TPR_SHADOW | \
+ CPU_BASED_USE_IO_BITMAPS | \
+ CPU_BASED_MONITOR_TRAP_FLAG | \
+ CPU_BASED_USE_MSR_BITMAPS | \
+ CPU_BASED_NMI_WINDOW_EXITING | \
+ CPU_BASED_PAUSE_EXITING | \
+ CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)
+
+#define EVMCS1_SUPPORTED_2NDEXEC \
+ (SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | \
+ SECONDARY_EXEC_WBINVD_EXITING | \
+ SECONDARY_EXEC_ENABLE_VPID | \
+ SECONDARY_EXEC_ENABLE_EPT | \
+ SECONDARY_EXEC_UNRESTRICTED_GUEST | \
+ SECONDARY_EXEC_DESC | \
+ SECONDARY_EXEC_ENABLE_RDTSCP | \
+ SECONDARY_EXEC_ENABLE_INVPCID | \
+ SECONDARY_EXEC_ENABLE_XSAVES | \
+ SECONDARY_EXEC_RDSEED_EXITING | \
+ SECONDARY_EXEC_RDRAND_EXITING | \
+ SECONDARY_EXEC_TSC_SCALING | \
+ SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE | \
+ SECONDARY_EXEC_PT_USE_GPA | \
+ SECONDARY_EXEC_PT_CONCEAL_VMX | \
+ SECONDARY_EXEC_BUS_LOCK_DETECTION | \
+ SECONDARY_EXEC_NOTIFY_VM_EXITING | \
+ SECONDARY_EXEC_ENCLS_EXITING)
+
+#define EVMCS1_SUPPORTED_3RDEXEC (0ULL)
+
+#define EVMCS1_SUPPORTED_VMEXIT_CTRL \
+ (VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR | \
+ VM_EXIT_SAVE_DEBUG_CONTROLS | \
+ VM_EXIT_ACK_INTR_ON_EXIT | \
+ VM_EXIT_HOST_ADDR_SPACE_SIZE | \
+ VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL | \
+ VM_EXIT_SAVE_IA32_PAT | \
+ VM_EXIT_LOAD_IA32_PAT | \
+ VM_EXIT_SAVE_IA32_EFER | \
+ VM_EXIT_LOAD_IA32_EFER | \
+ VM_EXIT_CLEAR_BNDCFGS | \
+ VM_EXIT_PT_CONCEAL_PIP | \
+ VM_EXIT_CLEAR_IA32_RTIT_CTL)
+
+#define EVMCS1_SUPPORTED_VMENTRY_CTRL \
+ (VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR | \
+ VM_ENTRY_LOAD_DEBUG_CONTROLS | \
+ VM_ENTRY_IA32E_MODE | \
+ VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL | \
+ VM_ENTRY_LOAD_IA32_PAT | \
+ VM_ENTRY_LOAD_IA32_EFER | \
+ VM_ENTRY_LOAD_BNDCFGS | \
+ VM_ENTRY_PT_CONCEAL_PIP | \
+ VM_ENTRY_LOAD_IA32_RTIT_CTL)
+
+#define EVMCS1_SUPPORTED_VMFUNC (0)
+
struct evmcs_field {
u16 offset;
u16 clean_field;
@@ -65,114 +166,6 @@ static inline u64 evmcs_read_any(struct hv_enlightened_vmcs *evmcs,
return vmcs12_read_any((void *)evmcs, field, offset);
}
-#if IS_ENABLED(CONFIG_HYPERV)
-
-DECLARE_STATIC_KEY_FALSE(__kvm_is_using_evmcs);
-
-static __always_inline bool kvm_is_using_evmcs(void)
-{
- return static_branch_unlikely(&__kvm_is_using_evmcs);
-}
-
-static __always_inline int get_evmcs_offset(unsigned long field,
- u16 *clean_field)
-{
- int offset = evmcs_field_offset(field, clean_field);
-
- WARN_ONCE(offset < 0, "accessing unsupported EVMCS field %lx\n", field);
- return offset;
-}
-
-static __always_inline void evmcs_write64(unsigned long field, u64 value)
-{
- u16 clean_field;
- int offset = get_evmcs_offset(field, &clean_field);
-
- if (offset < 0)
- return;
-
- *(u64 *)((char *)current_evmcs + offset) = value;
-
- current_evmcs->hv_clean_fields &= ~clean_field;
-}
-
-static __always_inline void evmcs_write32(unsigned long field, u32 value)
-{
- u16 clean_field;
- int offset = get_evmcs_offset(field, &clean_field);
-
- if (offset < 0)
- return;
-
- *(u32 *)((char *)current_evmcs + offset) = value;
- current_evmcs->hv_clean_fields &= ~clean_field;
-}
-
-static __always_inline void evmcs_write16(unsigned long field, u16 value)
-{
- u16 clean_field;
- int offset = get_evmcs_offset(field, &clean_field);
-
- if (offset < 0)
- return;
-
- *(u16 *)((char *)current_evmcs + offset) = value;
- current_evmcs->hv_clean_fields &= ~clean_field;
-}
-
-static __always_inline u64 evmcs_read64(unsigned long field)
-{
- int offset = get_evmcs_offset(field, NULL);
-
- if (offset < 0)
- return 0;
-
- return *(u64 *)((char *)current_evmcs + offset);
-}
-
-static __always_inline u32 evmcs_read32(unsigned long field)
-{
- int offset = get_evmcs_offset(field, NULL);
-
- if (offset < 0)
- return 0;
-
- return *(u32 *)((char *)current_evmcs + offset);
-}
-
-static __always_inline u16 evmcs_read16(unsigned long field)
-{
- int offset = get_evmcs_offset(field, NULL);
-
- if (offset < 0)
- return 0;
-
- return *(u16 *)((char *)current_evmcs + offset);
-}
-
-static inline void evmcs_load(u64 phys_addr)
-{
- struct hv_vp_assist_page *vp_ap =
- hv_get_vp_assist_page(smp_processor_id());
-
- if (current_evmcs->hv_enlightenments_control.nested_flush_hypercall)
- vp_ap->nested_control.features.directhypercall = 1;
- vp_ap->current_nested_vmcs = phys_addr;
- vp_ap->enlighten_vmentry = 1;
-}
-
-void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf);
-#else /* !IS_ENABLED(CONFIG_HYPERV) */
-static __always_inline bool kvm_is_using_evmcs(void) { return false; }
-static __always_inline void evmcs_write64(unsigned long field, u64 value) {}
-static __always_inline void evmcs_write32(unsigned long field, u32 value) {}
-static __always_inline void evmcs_write16(unsigned long field, u16 value) {}
-static __always_inline u64 evmcs_read64(unsigned long field) { return 0; }
-static __always_inline u32 evmcs_read32(unsigned long field) { return 0; }
-static __always_inline u16 evmcs_read16(unsigned long field) { return 0; }
-static inline void evmcs_load(u64 phys_addr) {}
-#endif /* IS_ENABLED(CONFIG_HYPERV) */
-
#define EVMPTR_INVALID (-1ULL)
#define EVMPTR_MAP_PENDING (-2ULL)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index cf19a3346639..552593a2ac14 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -66,6 +66,7 @@
#include "vmx.h"
#include "x86.h"
#include "smm.h"
+#include "vmx_onhyperv.h"
MODULE_AUTHOR("Qumranet");
MODULE_LICENSE("GPL");
diff --git a/arch/x86/kvm/vmx/vmx_onhyperv.c b/arch/x86/kvm/vmx/vmx_onhyperv.c
new file mode 100644
index 000000000000..b9a8b91166d0
--- /dev/null
+++ b/arch/x86/kvm/vmx/vmx_onhyperv.c
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "capabilities.h"
+#include "vmx_onhyperv.h"
+
+DEFINE_STATIC_KEY_FALSE(__kvm_is_using_evmcs);
+
+/*
+ * KVM on Hyper-V always uses the latest known eVMCSv1 revision, the assumption
+ * is: in case a feature has corresponding fields in eVMCS described and it was
+ * exposed in VMX feature MSRs, KVM is free to use it. Warn if KVM meets a
+ * feature which has no corresponding eVMCS field, this likely means that KVM
+ * needs to be updated.
+ */
+#define evmcs_check_vmcs_conf(field, ctrl) \
+ do { \
+ typeof(vmcs_conf->field) unsupported; \
+ \
+ unsupported = vmcs_conf->field & ~EVMCS1_SUPPORTED_ ## ctrl; \
+ if (unsupported) { \
+ pr_warn_once(#field " unsupported with eVMCS: 0x%llx\n",\
+ (u64)unsupported); \
+ vmcs_conf->field &= EVMCS1_SUPPORTED_ ## ctrl; \
+ } \
+ } \
+ while (0)
+
+void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf)
+{
+ evmcs_check_vmcs_conf(cpu_based_exec_ctrl, EXEC_CTRL);
+ evmcs_check_vmcs_conf(pin_based_exec_ctrl, PINCTRL);
+ evmcs_check_vmcs_conf(cpu_based_2nd_exec_ctrl, 2NDEXEC);
+ evmcs_check_vmcs_conf(cpu_based_3rd_exec_ctrl, 3RDEXEC);
+ evmcs_check_vmcs_conf(vmentry_ctrl, VMENTRY_CTRL);
+ evmcs_check_vmcs_conf(vmexit_ctrl, VMEXIT_CTRL);
+}
diff --git a/arch/x86/kvm/vmx/vmx_onhyperv.h b/arch/x86/kvm/vmx/vmx_onhyperv.h
new file mode 100644
index 000000000000..11541d272dbd
--- /dev/null
+++ b/arch/x86/kvm/vmx/vmx_onhyperv.h
@@ -0,0 +1,124 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __ARCH_X86_KVM_VMX_ONHYPERV_H__
+#define __ARCH_X86_KVM_VMX_ONHYPERV_H__
+
+#include <asm/hyperv-tlfs.h>
+
+#include <linux/jump_label.h>
+
+#include "capabilities.h"
+#include "hyperv.h"
+#include "vmcs12.h"
+
+#define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs))
+
+#if IS_ENABLED(CONFIG_HYPERV)
+
+DECLARE_STATIC_KEY_FALSE(__kvm_is_using_evmcs);
+
+static __always_inline bool kvm_is_using_evmcs(void)
+{
+ return static_branch_unlikely(&__kvm_is_using_evmcs);
+}
+
+static __always_inline int get_evmcs_offset(unsigned long field,
+ u16 *clean_field)
+{
+ int offset = evmcs_field_offset(field, clean_field);
+
+ WARN_ONCE(offset < 0, "accessing unsupported EVMCS field %lx\n", field);
+ return offset;
+}
+
+static __always_inline void evmcs_write64(unsigned long field, u64 value)
+{
+ u16 clean_field;
+ int offset = get_evmcs_offset(field, &clean_field);
+
+ if (offset < 0)
+ return;
+
+ *(u64 *)((char *)current_evmcs + offset) = value;
+
+ current_evmcs->hv_clean_fields &= ~clean_field;
+}
+
+static __always_inline void evmcs_write32(unsigned long field, u32 value)
+{
+ u16 clean_field;
+ int offset = get_evmcs_offset(field, &clean_field);
+
+ if (offset < 0)
+ return;
+
+ *(u32 *)((char *)current_evmcs + offset) = value;
+ current_evmcs->hv_clean_fields &= ~clean_field;
+}
+
+static __always_inline void evmcs_write16(unsigned long field, u16 value)
+{
+ u16 clean_field;
+ int offset = get_evmcs_offset(field, &clean_field);
+
+ if (offset < 0)
+ return;
+
+ *(u16 *)((char *)current_evmcs + offset) = value;
+ current_evmcs->hv_clean_fields &= ~clean_field;
+}
+
+static __always_inline u64 evmcs_read64(unsigned long field)
+{
+ int offset = get_evmcs_offset(field, NULL);
+
+ if (offset < 0)
+ return 0;
+
+ return *(u64 *)((char *)current_evmcs + offset);
+}
+
+static __always_inline u32 evmcs_read32(unsigned long field)
+{
+ int offset = get_evmcs_offset(field, NULL);
+
+ if (offset < 0)
+ return 0;
+
+ return *(u32 *)((char *)current_evmcs + offset);
+}
+
+static __always_inline u16 evmcs_read16(unsigned long field)
+{
+ int offset = get_evmcs_offset(field, NULL);
+
+ if (offset < 0)
+ return 0;
+
+ return *(u16 *)((char *)current_evmcs + offset);
+}
+
+static inline void evmcs_load(u64 phys_addr)
+{
+ struct hv_vp_assist_page *vp_ap =
+ hv_get_vp_assist_page(smp_processor_id());
+
+ if (current_evmcs->hv_enlightenments_control.nested_flush_hypercall)
+ vp_ap->nested_control.features.directhypercall = 1;
+ vp_ap->current_nested_vmcs = phys_addr;
+ vp_ap->enlighten_vmentry = 1;
+}
+
+void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf);
+#else /* !IS_ENABLED(CONFIG_HYPERV) */
+static __always_inline bool kvm_is_using_evmcs(void) { return false; }
+static __always_inline void evmcs_write64(unsigned long field, u64 value) {}
+static __always_inline void evmcs_write32(unsigned long field, u32 value) {}
+static __always_inline void evmcs_write16(unsigned long field, u16 value) {}
+static __always_inline u64 evmcs_read64(unsigned long field) { return 0; }
+static __always_inline u32 evmcs_read32(unsigned long field) { return 0; }
+static __always_inline u16 evmcs_read16(unsigned long field) { return 0; }
+static inline void evmcs_load(u64 phys_addr) {}
+#endif /* IS_ENABLED(CONFIG_HYPERV) */
+
+#endif /* __ARCH_X86_KVM_VMX_ONHYPERV_H__ */
diff --git a/arch/x86/kvm/vmx/vmx_ops.h b/arch/x86/kvm/vmx/vmx_ops.h
index 33af7b4c6eb4..f41ce3c24123 100644
--- a/arch/x86/kvm/vmx/vmx_ops.h
+++ b/arch/x86/kvm/vmx/vmx_ops.h
@@ -6,7 +6,7 @@
#include <asm/vmx.h>
-#include "hyperv.h"
+#include "vmx_onhyperv.h"
#include "vmcs.h"
#include "../x86.h"
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 04/16] KVM: x86: hyper-v: Introduce kvm_hv_synic_auto_eoi_set()
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (2 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 03/16] KVM: VMX: Split off vmx_onhyperv.{ch} from hyperv.{ch} Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 05/16] KVM: x86: hyper-v: Introduce kvm_hv_synic_has_vector() Vitaly Kuznetsov
` (12 subsequent siblings)
16 siblings, 0 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
As a preparation to making Hyper-V emulation optional, create a dedicated
kvm_hv_synic_auto_eoi_set() helper to avoid extra ifdefs in lapic.c
No functional change intended.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/hyperv.h | 5 +++++
arch/x86/kvm/lapic.c | 2 +-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h
index f83b8db72b11..1897a219981d 100644
--- a/arch/x86/kvm/hyperv.h
+++ b/arch/x86/kvm/hyperv.h
@@ -105,6 +105,11 @@ int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint);
void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector);
int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages);
+static inline bool kvm_hv_synic_auto_eoi_set(struct kvm_vcpu *vcpu, int vector)
+{
+ return to_hv_vcpu(vcpu) && test_bit(vector, to_hv_synic(vcpu)->auto_eoi_bitmap);
+}
+
void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu);
bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu);
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 245b20973cae..f7abc1008cad 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2905,7 +2905,7 @@ int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu)
*/
apic_clear_irr(vector, apic);
- if (to_hv_vcpu(vcpu) && test_bit(vector, to_hv_synic(vcpu)->auto_eoi_bitmap)) {
+ if (kvm_hv_synic_auto_eoi_set(vcpu, vector)) {
/*
* For auto-EOI interrupts, there might be another pending
* interrupt above PPR, so check whether to raise another
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 05/16] KVM: x86: hyper-v: Introduce kvm_hv_synic_has_vector()
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (3 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 04/16] KVM: x86: hyper-v: Introduce kvm_hv_synic_auto_eoi_set() Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 06/16] KVM: VMX: Split off hyperv_evmcs.{ch} Vitaly Kuznetsov
` (11 subsequent siblings)
16 siblings, 0 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
As a preparation to making Hyper-V emulation optional, create a dedicated
kvm_hv_synic_has_vector() helper to avoid extra ifdefs in lapic.c.
No functional change intended.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/hyperv.h | 5 +++++
arch/x86/kvm/lapic.c | 3 +--
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h
index 1897a219981d..ddb1d0b019e6 100644
--- a/arch/x86/kvm/hyperv.h
+++ b/arch/x86/kvm/hyperv.h
@@ -105,6 +105,11 @@ int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint);
void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector);
int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages);
+static inline bool kvm_hv_synic_has_vector(struct kvm_vcpu *vcpu, int vector)
+{
+ return to_hv_vcpu(vcpu) && test_bit(vector, to_hv_synic(vcpu)->vec_bitmap);
+}
+
static inline bool kvm_hv_synic_auto_eoi_set(struct kvm_vcpu *vcpu, int vector)
{
return to_hv_vcpu(vcpu) && test_bit(vector, to_hv_synic(vcpu)->auto_eoi_bitmap);
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index f7abc1008cad..3242f3da2457 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1475,8 +1475,7 @@ static int apic_set_eoi(struct kvm_lapic *apic)
apic_clear_isr(vector, apic);
apic_update_ppr(apic);
- if (to_hv_vcpu(apic->vcpu) &&
- test_bit(vector, to_hv_synic(apic->vcpu)->vec_bitmap))
+ if (kvm_hv_synic_has_vector(apic->vcpu, vector))
kvm_hv_synic_send_eoi(apic->vcpu, vector);
kvm_ioapic_send_eoi(apic, vector);
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 06/16] KVM: VMX: Split off hyperv_evmcs.{ch}
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (4 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 05/16] KVM: x86: hyper-v: Introduce kvm_hv_synic_has_vector() Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 07/16] KVM: x86: hyper-v: Introduce kvm_hv_nested_transtion_tlb_flush() helper Vitaly Kuznetsov
` (10 subsequent siblings)
16 siblings, 0 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
Some Enlightened VMCS related code is needed both by Hyper-V on KVM and
KVM on Hyper-V. As a preparation to making Hyper-V emulation optional,
create dedicated 'hyperv_evmcs.{ch}' files which are used by both.
No functional change intended.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/Makefile | 2 +-
arch/x86/kvm/vmx/hyperv.c | 308 -------------------------------
arch/x86/kvm/vmx/hyperv.h | 163 +----------------
arch/x86/kvm/vmx/hyperv_evmcs.c | 315 ++++++++++++++++++++++++++++++++
arch/x86/kvm/vmx/hyperv_evmcs.h | 166 +++++++++++++++++
arch/x86/kvm/vmx/nested.h | 1 +
arch/x86/kvm/vmx/vmx_onhyperv.h | 3 +-
7 files changed, 486 insertions(+), 472 deletions(-)
create mode 100644 arch/x86/kvm/vmx/hyperv_evmcs.c
create mode 100644 arch/x86/kvm/vmx/hyperv_evmcs.h
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index a99ffc3f3a3f..8ea872401cd6 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -23,7 +23,7 @@ kvm-$(CONFIG_KVM_XEN) += xen.o
kvm-$(CONFIG_KVM_SMM) += smm.o
kvm-intel-y += vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o vmx/vmcs12.o \
- vmx/hyperv.o vmx/nested.o vmx/posted_intr.o
+ vmx/hyperv.o vmx/hyperv_evmcs.o vmx/nested.o vmx/posted_intr.o
kvm-intel-$(CONFIG_X86_SGX_KVM) += vmx/sgx.o
ifdef CONFIG_HYPERV
diff --git a/arch/x86/kvm/vmx/hyperv.c b/arch/x86/kvm/vmx/hyperv.c
index de13dc14fe1d..fab6a1ad98dc 100644
--- a/arch/x86/kvm/vmx/hyperv.c
+++ b/arch/x86/kvm/vmx/hyperv.c
@@ -13,314 +13,6 @@
#define CC KVM_NESTED_VMENTER_CONSISTENCY_CHECK
-#define EVMCS1_OFFSET(x) offsetof(struct hv_enlightened_vmcs, x)
-#define EVMCS1_FIELD(number, name, clean_field)[ROL16(number, 6)] = \
- {EVMCS1_OFFSET(name), clean_field}
-
-const struct evmcs_field vmcs_field_to_evmcs_1[] = {
- /* 64 bit rw */
- EVMCS1_FIELD(GUEST_RIP, guest_rip,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
- EVMCS1_FIELD(GUEST_RSP, guest_rsp,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
- EVMCS1_FIELD(GUEST_RFLAGS, guest_rflags,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
- EVMCS1_FIELD(HOST_IA32_PAT, host_ia32_pat,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_IA32_EFER, host_ia32_efer,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_IA32_PERF_GLOBAL_CTRL, host_ia32_perf_global_ctrl,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_CR0, host_cr0,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_CR3, host_cr3,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_CR4, host_cr4,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_IA32_SYSENTER_ESP, host_ia32_sysenter_esp,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_RIP, host_rip,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(IO_BITMAP_A, io_bitmap_a,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP),
- EVMCS1_FIELD(IO_BITMAP_B, io_bitmap_b,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP),
- EVMCS1_FIELD(MSR_BITMAP, msr_bitmap,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP),
- EVMCS1_FIELD(GUEST_ES_BASE, guest_es_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_CS_BASE, guest_cs_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_SS_BASE, guest_ss_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_DS_BASE, guest_ds_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_FS_BASE, guest_fs_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_GS_BASE, guest_gs_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_LDTR_BASE, guest_ldtr_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_TR_BASE, guest_tr_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_GDTR_BASE, guest_gdtr_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_IDTR_BASE, guest_idtr_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(TSC_OFFSET, tsc_offset,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
- EVMCS1_FIELD(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
- EVMCS1_FIELD(VMCS_LINK_POINTER, vmcs_link_pointer,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(GUEST_IA32_PAT, guest_ia32_pat,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(GUEST_IA32_EFER, guest_ia32_efer,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(GUEST_IA32_PERF_GLOBAL_CTRL, guest_ia32_perf_global_ctrl,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(GUEST_PDPTR0, guest_pdptr0,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(GUEST_PDPTR1, guest_pdptr1,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(GUEST_PDPTR2, guest_pdptr2,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(GUEST_PDPTR3, guest_pdptr3,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(GUEST_PENDING_DBG_EXCEPTIONS, guest_pending_dbg_exceptions,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(GUEST_SYSENTER_ESP, guest_sysenter_esp,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(GUEST_SYSENTER_EIP, guest_sysenter_eip,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(CR0_GUEST_HOST_MASK, cr0_guest_host_mask,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
- EVMCS1_FIELD(CR4_GUEST_HOST_MASK, cr4_guest_host_mask,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
- EVMCS1_FIELD(CR0_READ_SHADOW, cr0_read_shadow,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
- EVMCS1_FIELD(CR4_READ_SHADOW, cr4_read_shadow,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
- EVMCS1_FIELD(GUEST_CR0, guest_cr0,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
- EVMCS1_FIELD(GUEST_CR3, guest_cr3,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
- EVMCS1_FIELD(GUEST_CR4, guest_cr4,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
- EVMCS1_FIELD(GUEST_DR7, guest_dr7,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
- EVMCS1_FIELD(HOST_FS_BASE, host_fs_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
- EVMCS1_FIELD(HOST_GS_BASE, host_gs_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
- EVMCS1_FIELD(HOST_TR_BASE, host_tr_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
- EVMCS1_FIELD(HOST_GDTR_BASE, host_gdtr_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
- EVMCS1_FIELD(HOST_IDTR_BASE, host_idtr_base,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
- EVMCS1_FIELD(HOST_RSP, host_rsp,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
- EVMCS1_FIELD(EPT_POINTER, ept_pointer,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT),
- EVMCS1_FIELD(GUEST_BNDCFGS, guest_bndcfgs,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(XSS_EXIT_BITMAP, xss_exit_bitmap,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
- EVMCS1_FIELD(ENCLS_EXITING_BITMAP, encls_exiting_bitmap,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
- EVMCS1_FIELD(TSC_MULTIPLIER, tsc_multiplier,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
- /*
- * Not used by KVM:
- *
- * EVMCS1_FIELD(0x00006828, guest_ia32_s_cet,
- * HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- * EVMCS1_FIELD(0x0000682A, guest_ssp,
- * HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
- * EVMCS1_FIELD(0x0000682C, guest_ia32_int_ssp_table_addr,
- * HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- * EVMCS1_FIELD(0x00002816, guest_ia32_lbr_ctl,
- * HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- * EVMCS1_FIELD(0x00006C18, host_ia32_s_cet,
- * HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- * EVMCS1_FIELD(0x00006C1A, host_ssp,
- * HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- * EVMCS1_FIELD(0x00006C1C, host_ia32_int_ssp_table_addr,
- * HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- */
-
- /* 64 bit read only */
- EVMCS1_FIELD(GUEST_PHYSICAL_ADDRESS, guest_physical_address,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
- EVMCS1_FIELD(EXIT_QUALIFICATION, exit_qualification,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
- /*
- * Not defined in KVM:
- *
- * EVMCS1_FIELD(0x00006402, exit_io_instruction_ecx,
- * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
- * EVMCS1_FIELD(0x00006404, exit_io_instruction_esi,
- * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
- * EVMCS1_FIELD(0x00006406, exit_io_instruction_esi,
- * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
- * EVMCS1_FIELD(0x00006408, exit_io_instruction_eip,
- * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
- */
- EVMCS1_FIELD(GUEST_LINEAR_ADDRESS, guest_linear_address,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
-
- /*
- * No mask defined in the spec as Hyper-V doesn't currently support
- * these. Future proof by resetting the whole clean field mask on
- * access.
- */
- EVMCS1_FIELD(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
- EVMCS1_FIELD(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
- EVMCS1_FIELD(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
-
- /* 32 bit rw */
- EVMCS1_FIELD(TPR_THRESHOLD, tpr_threshold,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
- EVMCS1_FIELD(GUEST_INTERRUPTIBILITY_INFO, guest_interruptibility_info,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
- EVMCS1_FIELD(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_PROC),
- EVMCS1_FIELD(EXCEPTION_BITMAP, exception_bitmap,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EXCPN),
- EVMCS1_FIELD(VM_ENTRY_CONTROLS, vm_entry_controls,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_ENTRY),
- EVMCS1_FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
- EVMCS1_FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE,
- vm_entry_exception_error_code,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
- EVMCS1_FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
- EVMCS1_FIELD(HOST_IA32_SYSENTER_CS, host_ia32_sysenter_cs,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(PIN_BASED_VM_EXEC_CONTROL, pin_based_vm_exec_control,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
- EVMCS1_FIELD(VM_EXIT_CONTROLS, vm_exit_controls,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
- EVMCS1_FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
- EVMCS1_FIELD(GUEST_ES_LIMIT, guest_es_limit,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_CS_LIMIT, guest_cs_limit,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_SS_LIMIT, guest_ss_limit,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_DS_LIMIT, guest_ds_limit,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_FS_LIMIT, guest_fs_limit,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_GS_LIMIT, guest_gs_limit,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_LDTR_LIMIT, guest_ldtr_limit,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_TR_LIMIT, guest_tr_limit,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_GDTR_LIMIT, guest_gdtr_limit,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_IDTR_LIMIT, guest_idtr_limit,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_ES_AR_BYTES, guest_es_ar_bytes,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_CS_AR_BYTES, guest_cs_ar_bytes,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_SS_AR_BYTES, guest_ss_ar_bytes,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_DS_AR_BYTES, guest_ds_ar_bytes,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_FS_AR_BYTES, guest_fs_ar_bytes,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_GS_AR_BYTES, guest_gs_ar_bytes,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_LDTR_AR_BYTES, guest_ldtr_ar_bytes,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_TR_AR_BYTES, guest_tr_ar_bytes,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_ACTIVITY_STATE, guest_activity_state,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
- EVMCS1_FIELD(GUEST_SYSENTER_CS, guest_sysenter_cs,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
-
- /* 32 bit read only */
- EVMCS1_FIELD(VM_INSTRUCTION_ERROR, vm_instruction_error,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
- EVMCS1_FIELD(VM_EXIT_REASON, vm_exit_reason,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
- EVMCS1_FIELD(VM_EXIT_INTR_INFO, vm_exit_intr_info,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
- EVMCS1_FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
- EVMCS1_FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
- EVMCS1_FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
- EVMCS1_FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
- EVMCS1_FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
-
- /* No mask defined in the spec (not used) */
- EVMCS1_FIELD(PAGE_FAULT_ERROR_CODE_MASK, page_fault_error_code_mask,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
- EVMCS1_FIELD(PAGE_FAULT_ERROR_CODE_MATCH, page_fault_error_code_match,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
- EVMCS1_FIELD(CR3_TARGET_COUNT, cr3_target_count,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
- EVMCS1_FIELD(VM_EXIT_MSR_STORE_COUNT, vm_exit_msr_store_count,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
- EVMCS1_FIELD(VM_EXIT_MSR_LOAD_COUNT, vm_exit_msr_load_count,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
- EVMCS1_FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
-
- /* 16 bit rw */
- EVMCS1_FIELD(HOST_ES_SELECTOR, host_es_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_CS_SELECTOR, host_cs_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_SS_SELECTOR, host_ss_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_DS_SELECTOR, host_ds_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_FS_SELECTOR, host_fs_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_GS_SELECTOR, host_gs_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(HOST_TR_SELECTOR, host_tr_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
- EVMCS1_FIELD(GUEST_ES_SELECTOR, guest_es_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_CS_SELECTOR, guest_cs_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_SS_SELECTOR, guest_ss_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_DS_SELECTOR, guest_ds_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_FS_SELECTOR, guest_fs_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_GS_SELECTOR, guest_gs_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_LDTR_SELECTOR, guest_ldtr_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(GUEST_TR_SELECTOR, guest_tr_selector,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
- EVMCS1_FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id,
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT),
-};
-const unsigned int nr_evmcs_1_fields = ARRAY_SIZE(vmcs_field_to_evmcs_1);
-
u64 nested_get_evmptr(struct kvm_vcpu *vcpu)
{
struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
diff --git a/arch/x86/kvm/vmx/hyperv.h b/arch/x86/kvm/vmx/hyperv.h
index 9401dbfaea7c..d4ed99008518 100644
--- a/arch/x86/kvm/vmx/hyperv.h
+++ b/arch/x86/kvm/vmx/hyperv.h
@@ -2,170 +2,9 @@
#ifndef __KVM_X86_VMX_HYPERV_H
#define __KVM_X86_VMX_HYPERV_H
-#include <linux/jump_label.h>
-
-#include <asm/hyperv-tlfs.h>
-#include <asm/mshyperv.h>
-#include <asm/vmx.h>
-
-#include "../hyperv.h"
-
-#include "capabilities.h"
-#include "vmcs.h"
+#include <linux/kvm_host.h>
#include "vmcs12.h"
-#define KVM_EVMCS_VERSION 1
-
-/*
- * Enlightened VMCSv1 doesn't support these:
- *
- * POSTED_INTR_NV = 0x00000002,
- * GUEST_INTR_STATUS = 0x00000810,
- * APIC_ACCESS_ADDR = 0x00002014,
- * POSTED_INTR_DESC_ADDR = 0x00002016,
- * EOI_EXIT_BITMAP0 = 0x0000201c,
- * EOI_EXIT_BITMAP1 = 0x0000201e,
- * EOI_EXIT_BITMAP2 = 0x00002020,
- * EOI_EXIT_BITMAP3 = 0x00002022,
- * GUEST_PML_INDEX = 0x00000812,
- * PML_ADDRESS = 0x0000200e,
- * VM_FUNCTION_CONTROL = 0x00002018,
- * EPTP_LIST_ADDRESS = 0x00002024,
- * VMREAD_BITMAP = 0x00002026,
- * VMWRITE_BITMAP = 0x00002028,
- *
- * TSC_MULTIPLIER = 0x00002032,
- * PLE_GAP = 0x00004020,
- * PLE_WINDOW = 0x00004022,
- * VMX_PREEMPTION_TIMER_VALUE = 0x0000482E,
- *
- * Currently unsupported in KVM:
- * GUEST_IA32_RTIT_CTL = 0x00002814,
- */
-#define EVMCS1_SUPPORTED_PINCTRL \
- (PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR | \
- PIN_BASED_EXT_INTR_MASK | \
- PIN_BASED_NMI_EXITING | \
- PIN_BASED_VIRTUAL_NMIS)
-
-#define EVMCS1_SUPPORTED_EXEC_CTRL \
- (CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR | \
- CPU_BASED_HLT_EXITING | \
- CPU_BASED_CR3_LOAD_EXITING | \
- CPU_BASED_CR3_STORE_EXITING | \
- CPU_BASED_UNCOND_IO_EXITING | \
- CPU_BASED_MOV_DR_EXITING | \
- CPU_BASED_USE_TSC_OFFSETTING | \
- CPU_BASED_MWAIT_EXITING | \
- CPU_BASED_MONITOR_EXITING | \
- CPU_BASED_INVLPG_EXITING | \
- CPU_BASED_RDPMC_EXITING | \
- CPU_BASED_INTR_WINDOW_EXITING | \
- CPU_BASED_CR8_LOAD_EXITING | \
- CPU_BASED_CR8_STORE_EXITING | \
- CPU_BASED_RDTSC_EXITING | \
- CPU_BASED_TPR_SHADOW | \
- CPU_BASED_USE_IO_BITMAPS | \
- CPU_BASED_MONITOR_TRAP_FLAG | \
- CPU_BASED_USE_MSR_BITMAPS | \
- CPU_BASED_NMI_WINDOW_EXITING | \
- CPU_BASED_PAUSE_EXITING | \
- CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)
-
-#define EVMCS1_SUPPORTED_2NDEXEC \
- (SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | \
- SECONDARY_EXEC_WBINVD_EXITING | \
- SECONDARY_EXEC_ENABLE_VPID | \
- SECONDARY_EXEC_ENABLE_EPT | \
- SECONDARY_EXEC_UNRESTRICTED_GUEST | \
- SECONDARY_EXEC_DESC | \
- SECONDARY_EXEC_ENABLE_RDTSCP | \
- SECONDARY_EXEC_ENABLE_INVPCID | \
- SECONDARY_EXEC_ENABLE_XSAVES | \
- SECONDARY_EXEC_RDSEED_EXITING | \
- SECONDARY_EXEC_RDRAND_EXITING | \
- SECONDARY_EXEC_TSC_SCALING | \
- SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE | \
- SECONDARY_EXEC_PT_USE_GPA | \
- SECONDARY_EXEC_PT_CONCEAL_VMX | \
- SECONDARY_EXEC_BUS_LOCK_DETECTION | \
- SECONDARY_EXEC_NOTIFY_VM_EXITING | \
- SECONDARY_EXEC_ENCLS_EXITING)
-
-#define EVMCS1_SUPPORTED_3RDEXEC (0ULL)
-
-#define EVMCS1_SUPPORTED_VMEXIT_CTRL \
- (VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR | \
- VM_EXIT_SAVE_DEBUG_CONTROLS | \
- VM_EXIT_ACK_INTR_ON_EXIT | \
- VM_EXIT_HOST_ADDR_SPACE_SIZE | \
- VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL | \
- VM_EXIT_SAVE_IA32_PAT | \
- VM_EXIT_LOAD_IA32_PAT | \
- VM_EXIT_SAVE_IA32_EFER | \
- VM_EXIT_LOAD_IA32_EFER | \
- VM_EXIT_CLEAR_BNDCFGS | \
- VM_EXIT_PT_CONCEAL_PIP | \
- VM_EXIT_CLEAR_IA32_RTIT_CTL)
-
-#define EVMCS1_SUPPORTED_VMENTRY_CTRL \
- (VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR | \
- VM_ENTRY_LOAD_DEBUG_CONTROLS | \
- VM_ENTRY_IA32E_MODE | \
- VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL | \
- VM_ENTRY_LOAD_IA32_PAT | \
- VM_ENTRY_LOAD_IA32_EFER | \
- VM_ENTRY_LOAD_BNDCFGS | \
- VM_ENTRY_PT_CONCEAL_PIP | \
- VM_ENTRY_LOAD_IA32_RTIT_CTL)
-
-#define EVMCS1_SUPPORTED_VMFUNC (0)
-
-struct evmcs_field {
- u16 offset;
- u16 clean_field;
-};
-
-extern const struct evmcs_field vmcs_field_to_evmcs_1[];
-extern const unsigned int nr_evmcs_1_fields;
-
-static __always_inline int evmcs_field_offset(unsigned long field,
- u16 *clean_field)
-{
- unsigned int index = ROL16(field, 6);
- const struct evmcs_field *evmcs_field;
-
- if (unlikely(index >= nr_evmcs_1_fields))
- return -ENOENT;
-
- evmcs_field = &vmcs_field_to_evmcs_1[index];
-
- /*
- * Use offset=0 to detect holes in eVMCS. This offset belongs to
- * 'revision_id' but this field has no encoding and is supposed to
- * be accessed directly.
- */
- if (unlikely(!evmcs_field->offset))
- return -ENOENT;
-
- if (clean_field)
- *clean_field = evmcs_field->clean_field;
-
- return evmcs_field->offset;
-}
-
-static inline u64 evmcs_read_any(struct hv_enlightened_vmcs *evmcs,
- unsigned long field, u16 offset)
-{
- /*
- * vmcs12_read_any() doesn't care whether the supplied structure
- * is 'struct vmcs12' or 'struct hv_enlightened_vmcs' as it takes
- * the exact offset of the required field, use it for convenience
- * here.
- */
- return vmcs12_read_any((void *)evmcs, field, offset);
-}
-
#define EVMPTR_INVALID (-1ULL)
#define EVMPTR_MAP_PENDING (-2ULL)
diff --git a/arch/x86/kvm/vmx/hyperv_evmcs.c b/arch/x86/kvm/vmx/hyperv_evmcs.c
new file mode 100644
index 000000000000..904bfcd1519b
--- /dev/null
+++ b/arch/x86/kvm/vmx/hyperv_evmcs.c
@@ -0,0 +1,315 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * This file contains common code for working with Enlightened VMCS which is
+ * used both by Hyper-V on KVM and KVM on Hyper-V.
+ */
+
+#include "hyperv_evmcs.h"
+
+#define EVMCS1_OFFSET(x) offsetof(struct hv_enlightened_vmcs, x)
+#define EVMCS1_FIELD(number, name, clean_field)[ROL16(number, 6)] = \
+ {EVMCS1_OFFSET(name), clean_field}
+
+const struct evmcs_field vmcs_field_to_evmcs_1[] = {
+ /* 64 bit rw */
+ EVMCS1_FIELD(GUEST_RIP, guest_rip,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+ EVMCS1_FIELD(GUEST_RSP, guest_rsp,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
+ EVMCS1_FIELD(GUEST_RFLAGS, guest_rflags,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
+ EVMCS1_FIELD(HOST_IA32_PAT, host_ia32_pat,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_IA32_EFER, host_ia32_efer,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_IA32_PERF_GLOBAL_CTRL, host_ia32_perf_global_ctrl,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_CR0, host_cr0,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_CR3, host_cr3,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_CR4, host_cr4,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_IA32_SYSENTER_ESP, host_ia32_sysenter_esp,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_RIP, host_rip,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(IO_BITMAP_A, io_bitmap_a,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP),
+ EVMCS1_FIELD(IO_BITMAP_B, io_bitmap_b,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP),
+ EVMCS1_FIELD(MSR_BITMAP, msr_bitmap,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP),
+ EVMCS1_FIELD(GUEST_ES_BASE, guest_es_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_CS_BASE, guest_cs_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_SS_BASE, guest_ss_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_DS_BASE, guest_ds_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_FS_BASE, guest_fs_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_GS_BASE, guest_gs_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_LDTR_BASE, guest_ldtr_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_TR_BASE, guest_tr_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_GDTR_BASE, guest_gdtr_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_IDTR_BASE, guest_idtr_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(TSC_OFFSET, tsc_offset,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
+ EVMCS1_FIELD(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
+ EVMCS1_FIELD(VMCS_LINK_POINTER, vmcs_link_pointer,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(GUEST_IA32_PAT, guest_ia32_pat,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(GUEST_IA32_EFER, guest_ia32_efer,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(GUEST_IA32_PERF_GLOBAL_CTRL, guest_ia32_perf_global_ctrl,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(GUEST_PDPTR0, guest_pdptr0,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(GUEST_PDPTR1, guest_pdptr1,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(GUEST_PDPTR2, guest_pdptr2,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(GUEST_PDPTR3, guest_pdptr3,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(GUEST_PENDING_DBG_EXCEPTIONS, guest_pending_dbg_exceptions,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(GUEST_SYSENTER_ESP, guest_sysenter_esp,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(GUEST_SYSENTER_EIP, guest_sysenter_eip,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(CR0_GUEST_HOST_MASK, cr0_guest_host_mask,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
+ EVMCS1_FIELD(CR4_GUEST_HOST_MASK, cr4_guest_host_mask,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
+ EVMCS1_FIELD(CR0_READ_SHADOW, cr0_read_shadow,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
+ EVMCS1_FIELD(CR4_READ_SHADOW, cr4_read_shadow,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
+ EVMCS1_FIELD(GUEST_CR0, guest_cr0,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
+ EVMCS1_FIELD(GUEST_CR3, guest_cr3,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
+ EVMCS1_FIELD(GUEST_CR4, guest_cr4,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
+ EVMCS1_FIELD(GUEST_DR7, guest_dr7,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
+ EVMCS1_FIELD(HOST_FS_BASE, host_fs_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
+ EVMCS1_FIELD(HOST_GS_BASE, host_gs_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
+ EVMCS1_FIELD(HOST_TR_BASE, host_tr_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
+ EVMCS1_FIELD(HOST_GDTR_BASE, host_gdtr_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
+ EVMCS1_FIELD(HOST_IDTR_BASE, host_idtr_base,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
+ EVMCS1_FIELD(HOST_RSP, host_rsp,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
+ EVMCS1_FIELD(EPT_POINTER, ept_pointer,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT),
+ EVMCS1_FIELD(GUEST_BNDCFGS, guest_bndcfgs,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(XSS_EXIT_BITMAP, xss_exit_bitmap,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
+ EVMCS1_FIELD(ENCLS_EXITING_BITMAP, encls_exiting_bitmap,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
+ EVMCS1_FIELD(TSC_MULTIPLIER, tsc_multiplier,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
+ /*
+ * Not used by KVM:
+ *
+ * EVMCS1_FIELD(0x00006828, guest_ia32_s_cet,
+ * HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ * EVMCS1_FIELD(0x0000682A, guest_ssp,
+ * HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
+ * EVMCS1_FIELD(0x0000682C, guest_ia32_int_ssp_table_addr,
+ * HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ * EVMCS1_FIELD(0x00002816, guest_ia32_lbr_ctl,
+ * HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ * EVMCS1_FIELD(0x00006C18, host_ia32_s_cet,
+ * HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ * EVMCS1_FIELD(0x00006C1A, host_ssp,
+ * HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ * EVMCS1_FIELD(0x00006C1C, host_ia32_int_ssp_table_addr,
+ * HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ */
+
+ /* 64 bit read only */
+ EVMCS1_FIELD(GUEST_PHYSICAL_ADDRESS, guest_physical_address,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+ EVMCS1_FIELD(EXIT_QUALIFICATION, exit_qualification,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+ /*
+ * Not defined in KVM:
+ *
+ * EVMCS1_FIELD(0x00006402, exit_io_instruction_ecx,
+ * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
+ * EVMCS1_FIELD(0x00006404, exit_io_instruction_esi,
+ * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
+ * EVMCS1_FIELD(0x00006406, exit_io_instruction_esi,
+ * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
+ * EVMCS1_FIELD(0x00006408, exit_io_instruction_eip,
+ * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
+ */
+ EVMCS1_FIELD(GUEST_LINEAR_ADDRESS, guest_linear_address,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+
+ /*
+ * No mask defined in the spec as Hyper-V doesn't currently support
+ * these. Future proof by resetting the whole clean field mask on
+ * access.
+ */
+ EVMCS1_FIELD(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
+ EVMCS1_FIELD(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
+ EVMCS1_FIELD(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
+
+ /* 32 bit rw */
+ EVMCS1_FIELD(TPR_THRESHOLD, tpr_threshold,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+ EVMCS1_FIELD(GUEST_INTERRUPTIBILITY_INFO, guest_interruptibility_info,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
+ EVMCS1_FIELD(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_PROC),
+ EVMCS1_FIELD(EXCEPTION_BITMAP, exception_bitmap,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EXCPN),
+ EVMCS1_FIELD(VM_ENTRY_CONTROLS, vm_entry_controls,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_ENTRY),
+ EVMCS1_FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
+ EVMCS1_FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE,
+ vm_entry_exception_error_code,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
+ EVMCS1_FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
+ EVMCS1_FIELD(HOST_IA32_SYSENTER_CS, host_ia32_sysenter_cs,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(PIN_BASED_VM_EXEC_CONTROL, pin_based_vm_exec_control,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
+ EVMCS1_FIELD(VM_EXIT_CONTROLS, vm_exit_controls,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
+ EVMCS1_FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
+ EVMCS1_FIELD(GUEST_ES_LIMIT, guest_es_limit,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_CS_LIMIT, guest_cs_limit,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_SS_LIMIT, guest_ss_limit,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_DS_LIMIT, guest_ds_limit,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_FS_LIMIT, guest_fs_limit,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_GS_LIMIT, guest_gs_limit,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_LDTR_LIMIT, guest_ldtr_limit,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_TR_LIMIT, guest_tr_limit,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_GDTR_LIMIT, guest_gdtr_limit,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_IDTR_LIMIT, guest_idtr_limit,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_ES_AR_BYTES, guest_es_ar_bytes,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_CS_AR_BYTES, guest_cs_ar_bytes,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_SS_AR_BYTES, guest_ss_ar_bytes,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_DS_AR_BYTES, guest_ds_ar_bytes,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_FS_AR_BYTES, guest_fs_ar_bytes,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_GS_AR_BYTES, guest_gs_ar_bytes,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_LDTR_AR_BYTES, guest_ldtr_ar_bytes,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_TR_AR_BYTES, guest_tr_ar_bytes,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_ACTIVITY_STATE, guest_activity_state,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+ EVMCS1_FIELD(GUEST_SYSENTER_CS, guest_sysenter_cs,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
+
+ /* 32 bit read only */
+ EVMCS1_FIELD(VM_INSTRUCTION_ERROR, vm_instruction_error,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+ EVMCS1_FIELD(VM_EXIT_REASON, vm_exit_reason,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+ EVMCS1_FIELD(VM_EXIT_INTR_INFO, vm_exit_intr_info,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+ EVMCS1_FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+ EVMCS1_FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+ EVMCS1_FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+ EVMCS1_FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+ EVMCS1_FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
+
+ /* No mask defined in the spec (not used) */
+ EVMCS1_FIELD(PAGE_FAULT_ERROR_CODE_MASK, page_fault_error_code_mask,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
+ EVMCS1_FIELD(PAGE_FAULT_ERROR_CODE_MATCH, page_fault_error_code_match,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
+ EVMCS1_FIELD(CR3_TARGET_COUNT, cr3_target_count,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
+ EVMCS1_FIELD(VM_EXIT_MSR_STORE_COUNT, vm_exit_msr_store_count,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
+ EVMCS1_FIELD(VM_EXIT_MSR_LOAD_COUNT, vm_exit_msr_load_count,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
+ EVMCS1_FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
+
+ /* 16 bit rw */
+ EVMCS1_FIELD(HOST_ES_SELECTOR, host_es_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_CS_SELECTOR, host_cs_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_SS_SELECTOR, host_ss_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_DS_SELECTOR, host_ds_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_FS_SELECTOR, host_fs_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_GS_SELECTOR, host_gs_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(HOST_TR_SELECTOR, host_tr_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
+ EVMCS1_FIELD(GUEST_ES_SELECTOR, guest_es_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_CS_SELECTOR, guest_cs_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_SS_SELECTOR, guest_ss_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_DS_SELECTOR, guest_ds_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_FS_SELECTOR, guest_fs_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_GS_SELECTOR, guest_gs_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_LDTR_SELECTOR, guest_ldtr_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(GUEST_TR_SELECTOR, guest_tr_selector,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
+ EVMCS1_FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id,
+ HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT),
+};
+const unsigned int nr_evmcs_1_fields = ARRAY_SIZE(vmcs_field_to_evmcs_1);
diff --git a/arch/x86/kvm/vmx/hyperv_evmcs.h b/arch/x86/kvm/vmx/hyperv_evmcs.h
new file mode 100644
index 000000000000..8220f2cd2f04
--- /dev/null
+++ b/arch/x86/kvm/vmx/hyperv_evmcs.h
@@ -0,0 +1,166 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * This file contains common definitions for working with Enlightened VMCS which
+ * are used both by Hyper-V on KVM and KVM on Hyper-V.
+ */
+#ifndef __KVM_X86_VMX_HYPERV_EVMCS_H
+#define __KVM_X86_VMX_HYPERV_EVMCS_H
+
+#include <asm/hyperv-tlfs.h>
+
+#include "capabilities.h"
+#include "vmcs12.h"
+
+#define KVM_EVMCS_VERSION 1
+
+/*
+ * Enlightened VMCSv1 doesn't support these:
+ *
+ * POSTED_INTR_NV = 0x00000002,
+ * GUEST_INTR_STATUS = 0x00000810,
+ * APIC_ACCESS_ADDR = 0x00002014,
+ * POSTED_INTR_DESC_ADDR = 0x00002016,
+ * EOI_EXIT_BITMAP0 = 0x0000201c,
+ * EOI_EXIT_BITMAP1 = 0x0000201e,
+ * EOI_EXIT_BITMAP2 = 0x00002020,
+ * EOI_EXIT_BITMAP3 = 0x00002022,
+ * GUEST_PML_INDEX = 0x00000812,
+ * PML_ADDRESS = 0x0000200e,
+ * VM_FUNCTION_CONTROL = 0x00002018,
+ * EPTP_LIST_ADDRESS = 0x00002024,
+ * VMREAD_BITMAP = 0x00002026,
+ * VMWRITE_BITMAP = 0x00002028,
+ *
+ * TSC_MULTIPLIER = 0x00002032,
+ * PLE_GAP = 0x00004020,
+ * PLE_WINDOW = 0x00004022,
+ * VMX_PREEMPTION_TIMER_VALUE = 0x0000482E,
+ *
+ * Currently unsupported in KVM:
+ * GUEST_IA32_RTIT_CTL = 0x00002814,
+ */
+#define EVMCS1_SUPPORTED_PINCTRL \
+ (PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR | \
+ PIN_BASED_EXT_INTR_MASK | \
+ PIN_BASED_NMI_EXITING | \
+ PIN_BASED_VIRTUAL_NMIS)
+
+#define EVMCS1_SUPPORTED_EXEC_CTRL \
+ (CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR | \
+ CPU_BASED_HLT_EXITING | \
+ CPU_BASED_CR3_LOAD_EXITING | \
+ CPU_BASED_CR3_STORE_EXITING | \
+ CPU_BASED_UNCOND_IO_EXITING | \
+ CPU_BASED_MOV_DR_EXITING | \
+ CPU_BASED_USE_TSC_OFFSETTING | \
+ CPU_BASED_MWAIT_EXITING | \
+ CPU_BASED_MONITOR_EXITING | \
+ CPU_BASED_INVLPG_EXITING | \
+ CPU_BASED_RDPMC_EXITING | \
+ CPU_BASED_INTR_WINDOW_EXITING | \
+ CPU_BASED_CR8_LOAD_EXITING | \
+ CPU_BASED_CR8_STORE_EXITING | \
+ CPU_BASED_RDTSC_EXITING | \
+ CPU_BASED_TPR_SHADOW | \
+ CPU_BASED_USE_IO_BITMAPS | \
+ CPU_BASED_MONITOR_TRAP_FLAG | \
+ CPU_BASED_USE_MSR_BITMAPS | \
+ CPU_BASED_NMI_WINDOW_EXITING | \
+ CPU_BASED_PAUSE_EXITING | \
+ CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)
+
+#define EVMCS1_SUPPORTED_2NDEXEC \
+ (SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | \
+ SECONDARY_EXEC_WBINVD_EXITING | \
+ SECONDARY_EXEC_ENABLE_VPID | \
+ SECONDARY_EXEC_ENABLE_EPT | \
+ SECONDARY_EXEC_UNRESTRICTED_GUEST | \
+ SECONDARY_EXEC_DESC | \
+ SECONDARY_EXEC_ENABLE_RDTSCP | \
+ SECONDARY_EXEC_ENABLE_INVPCID | \
+ SECONDARY_EXEC_ENABLE_XSAVES | \
+ SECONDARY_EXEC_RDSEED_EXITING | \
+ SECONDARY_EXEC_RDRAND_EXITING | \
+ SECONDARY_EXEC_TSC_SCALING | \
+ SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE | \
+ SECONDARY_EXEC_PT_USE_GPA | \
+ SECONDARY_EXEC_PT_CONCEAL_VMX | \
+ SECONDARY_EXEC_BUS_LOCK_DETECTION | \
+ SECONDARY_EXEC_NOTIFY_VM_EXITING | \
+ SECONDARY_EXEC_ENCLS_EXITING)
+
+#define EVMCS1_SUPPORTED_3RDEXEC (0ULL)
+
+#define EVMCS1_SUPPORTED_VMEXIT_CTRL \
+ (VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR | \
+ VM_EXIT_SAVE_DEBUG_CONTROLS | \
+ VM_EXIT_ACK_INTR_ON_EXIT | \
+ VM_EXIT_HOST_ADDR_SPACE_SIZE | \
+ VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL | \
+ VM_EXIT_SAVE_IA32_PAT | \
+ VM_EXIT_LOAD_IA32_PAT | \
+ VM_EXIT_SAVE_IA32_EFER | \
+ VM_EXIT_LOAD_IA32_EFER | \
+ VM_EXIT_CLEAR_BNDCFGS | \
+ VM_EXIT_PT_CONCEAL_PIP | \
+ VM_EXIT_CLEAR_IA32_RTIT_CTL)
+
+#define EVMCS1_SUPPORTED_VMENTRY_CTRL \
+ (VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR | \
+ VM_ENTRY_LOAD_DEBUG_CONTROLS | \
+ VM_ENTRY_IA32E_MODE | \
+ VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL | \
+ VM_ENTRY_LOAD_IA32_PAT | \
+ VM_ENTRY_LOAD_IA32_EFER | \
+ VM_ENTRY_LOAD_BNDCFGS | \
+ VM_ENTRY_PT_CONCEAL_PIP | \
+ VM_ENTRY_LOAD_IA32_RTIT_CTL)
+
+#define EVMCS1_SUPPORTED_VMFUNC (0)
+
+struct evmcs_field {
+ u16 offset;
+ u16 clean_field;
+};
+
+extern const struct evmcs_field vmcs_field_to_evmcs_1[];
+extern const unsigned int nr_evmcs_1_fields;
+
+static __always_inline int evmcs_field_offset(unsigned long field,
+ u16 *clean_field)
+{
+ unsigned int index = ROL16(field, 6);
+ const struct evmcs_field *evmcs_field;
+
+ if (unlikely(index >= nr_evmcs_1_fields))
+ return -ENOENT;
+
+ evmcs_field = &vmcs_field_to_evmcs_1[index];
+
+ /*
+ * Use offset=0 to detect holes in eVMCS. This offset belongs to
+ * 'revision_id' but this field has no encoding and is supposed to
+ * be accessed directly.
+ */
+ if (unlikely(!evmcs_field->offset))
+ return -ENOENT;
+
+ if (clean_field)
+ *clean_field = evmcs_field->clean_field;
+
+ return evmcs_field->offset;
+}
+
+static inline u64 evmcs_read_any(struct hv_enlightened_vmcs *evmcs,
+ unsigned long field, u16 offset)
+{
+ /*
+ * vmcs12_read_any() doesn't care whether the supplied structure
+ * is 'struct vmcs12' or 'struct hv_enlightened_vmcs' as it takes
+ * the exact offset of the required field, use it for convenience
+ * here.
+ */
+ return vmcs12_read_any((void *)evmcs, field, offset);
+}
+
+#endif /* __KVM_X86_VMX_HYPERV_H */
diff --git a/arch/x86/kvm/vmx/nested.h b/arch/x86/kvm/vmx/nested.h
index b4b9d51438c6..b0f2e26c1aea 100644
--- a/arch/x86/kvm/vmx/nested.h
+++ b/arch/x86/kvm/vmx/nested.h
@@ -3,6 +3,7 @@
#define __KVM_X86_VMX_NESTED_H
#include "kvm_cache_regs.h"
+#include "hyperv.h"
#include "vmcs12.h"
#include "vmx.h"
diff --git a/arch/x86/kvm/vmx/vmx_onhyperv.h b/arch/x86/kvm/vmx/vmx_onhyperv.h
index 11541d272dbd..eb48153bfd73 100644
--- a/arch/x86/kvm/vmx/vmx_onhyperv.h
+++ b/arch/x86/kvm/vmx/vmx_onhyperv.h
@@ -4,11 +4,12 @@
#define __ARCH_X86_KVM_VMX_ONHYPERV_H__
#include <asm/hyperv-tlfs.h>
+#include <asm/mshyperv.h>
#include <linux/jump_label.h>
#include "capabilities.h"
-#include "hyperv.h"
+#include "hyperv_evmcs.h"
#include "vmcs12.h"
#define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs))
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 07/16] KVM: x86: hyper-v: Introduce kvm_hv_nested_transtion_tlb_flush() helper
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (5 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 06/16] KVM: VMX: Split off hyperv_evmcs.{ch} Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 08/16] KVM: x86: hyper-v: Split off nested_evmcs_handle_vmclear() Vitaly Kuznetsov
` (9 subsequent siblings)
16 siblings, 0 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
As a preparation to making Hyper-V emulation optional, introduce a helper
to handle pending KVM_REQ_HV_TLB_FLUSH requests.
No functional change intended.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/hyperv.h | 12 ++++++++++++
arch/x86/kvm/svm/nested.c | 10 ++--------
arch/x86/kvm/vmx/nested.c | 10 ++--------
3 files changed, 16 insertions(+), 16 deletions(-)
diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h
index ddb1d0b019e6..75dcbe598fbc 100644
--- a/arch/x86/kvm/hyperv.h
+++ b/arch/x86/kvm/hyperv.h
@@ -246,6 +246,18 @@ static inline int kvm_hv_verify_vp_assist(struct kvm_vcpu *vcpu)
return kvm_hv_get_assist_page(vcpu);
}
+static inline void kvm_hv_nested_transtion_tlb_flush(struct kvm_vcpu *vcpu, bool tdp_enabled)
+{
+ /*
+ * KVM_REQ_HV_TLB_FLUSH flushes entries from either L1's VP_ID or
+ * L2's VP_ID upon request from the guest. Make sure we check for
+ * pending entries in the right FIFO upon L1/L2 transition as these
+ * requests are put by other vCPUs asynchronously.
+ */
+ if (to_hv_vcpu(vcpu) && tdp_enabled)
+ kvm_make_request(KVM_REQ_HV_TLB_FLUSH, vcpu);
+}
+
int kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu);
#endif
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 3fea8c47679e..74c04102ef01 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -487,14 +487,8 @@ static void nested_save_pending_event_to_vmcb12(struct vcpu_svm *svm,
static void nested_svm_transition_tlb_flush(struct kvm_vcpu *vcpu)
{
- /*
- * KVM_REQ_HV_TLB_FLUSH flushes entries from either L1's VP_ID or
- * L2's VP_ID upon request from the guest. Make sure we check for
- * pending entries in the right FIFO upon L1/L2 transition as these
- * requests are put by other vCPUs asynchronously.
- */
- if (to_hv_vcpu(vcpu) && npt_enabled)
- kvm_make_request(KVM_REQ_HV_TLB_FLUSH, vcpu);
+ /* Handle pending Hyper-V TLB flush requests */
+ kvm_hv_nested_transtion_tlb_flush(vcpu, npt_enabled);
/*
* TODO: optimize unconditional TLB flush/MMU sync. A partial list of
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index c5ec0ef51ff7..382c0746d069 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -1139,14 +1139,8 @@ static void nested_vmx_transition_tlb_flush(struct kvm_vcpu *vcpu,
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
- /*
- * KVM_REQ_HV_TLB_FLUSH flushes entries from either L1's VP_ID or
- * L2's VP_ID upon request from the guest. Make sure we check for
- * pending entries in the right FIFO upon L1/L2 transition as these
- * requests are put by other vCPUs asynchronously.
- */
- if (to_hv_vcpu(vcpu) && enable_ept)
- kvm_make_request(KVM_REQ_HV_TLB_FLUSH, vcpu);
+ /* Handle pending Hyper-V TLB flush requests */
+ kvm_hv_nested_transtion_tlb_flush(vcpu, enable_ept);
/*
* If vmcs12 doesn't use VPID, L1 expects linear and combined mappings
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 08/16] KVM: x86: hyper-v: Split off nested_evmcs_handle_vmclear()
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (6 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 07/16] KVM: x86: hyper-v: Introduce kvm_hv_nested_transtion_tlb_flush() helper Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 12:06 ` Maxim Levitsky
2023-12-05 10:36 ` [PATCH v2 09/16] KVM: selftests: Make all Hyper-V tests explicitly dependent on Hyper-V emulation support in KVM Vitaly Kuznetsov
` (8 subsequent siblings)
16 siblings, 1 reply; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
To avoid overloading handle_vmclear() with Hyper-V specific details and to
prepare the code to making Hyper-V emulation optional, create a dedicated
nested_evmcs_handle_vmclear() helper.
No functional change intended.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/vmx/nested.c | 38 ++++++++++++++++++++++++--------------
1 file changed, 24 insertions(+), 14 deletions(-)
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 382c0746d069..903b6f9ea2bd 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -243,6 +243,29 @@ static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
}
}
+static bool nested_evmcs_handle_vmclear(struct kvm_vcpu *vcpu, gpa_t vmptr)
+{
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
+ /*
+ * When Enlightened VMEntry is enabled on the calling CPU we treat
+ * memory area pointer by vmptr as Enlightened VMCS (as there's no good
+ * way to distinguish it from VMCS12) and we must not corrupt it by
+ * writing to the non-existent 'launch_state' field. The area doesn't
+ * have to be the currently active EVMCS on the calling CPU and there's
+ * nothing KVM has to do to transition it from 'active' to 'non-active'
+ * state. It is possible that the area will stay mapped as
+ * vmx->nested.hv_evmcs but this shouldn't be a problem.
+ */
+ if (!guest_cpuid_has_evmcs(vcpu) ||
+ !evmptr_is_valid(nested_get_evmptr(vcpu)))
+ return false;
+
+ if (vmx->nested.hv_evmcs && vmptr == vmx->nested.hv_evmcs_vmptr)
+ nested_release_evmcs(vcpu);
+
+ return true;
+}
+
static void vmx_sync_vmcs_host_state(struct vcpu_vmx *vmx,
struct loaded_vmcs *prev)
{
@@ -5286,18 +5309,7 @@ static int handle_vmclear(struct kvm_vcpu *vcpu)
if (vmptr == vmx->nested.vmxon_ptr)
return nested_vmx_fail(vcpu, VMXERR_VMCLEAR_VMXON_POINTER);
- /*
- * When Enlightened VMEntry is enabled on the calling CPU we treat
- * memory area pointer by vmptr as Enlightened VMCS (as there's no good
- * way to distinguish it from VMCS12) and we must not corrupt it by
- * writing to the non-existent 'launch_state' field. The area doesn't
- * have to be the currently active EVMCS on the calling CPU and there's
- * nothing KVM has to do to transition it from 'active' to 'non-active'
- * state. It is possible that the area will stay mapped as
- * vmx->nested.hv_evmcs but this shouldn't be a problem.
- */
- if (likely(!guest_cpuid_has_evmcs(vcpu) ||
- !evmptr_is_valid(nested_get_evmptr(vcpu)))) {
+ if (likely(!nested_evmcs_handle_vmclear(vcpu, vmptr))) {
if (vmptr == vmx->nested.current_vmptr)
nested_release_vmcs12(vcpu);
@@ -5314,8 +5326,6 @@ static int handle_vmclear(struct kvm_vcpu *vcpu)
vmptr + offsetof(struct vmcs12,
launch_state),
&zero, sizeof(zero));
- } else if (vmx->nested.hv_evmcs && vmptr == vmx->nested.hv_evmcs_vmptr) {
- nested_release_evmcs(vcpu);
}
return nested_vmx_succeed(vcpu);
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 09/16] KVM: selftests: Make all Hyper-V tests explicitly dependent on Hyper-V emulation support in KVM
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (7 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 08/16] KVM: x86: hyper-v: Split off nested_evmcs_handle_vmclear() Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 10/16] KVM: selftests: Fix vmxon_pa == vmcs12_pa == -1ull vmx_set_nested_state_test for !eVMCS case Vitaly Kuznetsov
` (7 subsequent siblings)
16 siblings, 0 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
In preparation for conditional Hyper-V emulation enablement in KVM, make
Hyper-V specific tests check skip gracefully instead of failing when the
support is not there.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
tools/testing/selftests/kvm/x86_64/hyperv_clock.c | 2 ++
tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c | 5 +++--
.../selftests/kvm/x86_64/hyperv_extended_hypercalls.c | 2 ++
tools/testing/selftests/kvm/x86_64/hyperv_features.c | 2 ++
tools/testing/selftests/kvm/x86_64/hyperv_ipi.c | 2 ++
tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c | 1 +
tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c | 2 ++
7 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_clock.c b/tools/testing/selftests/kvm/x86_64/hyperv_clock.c
index f25749eaa6a8..f5e1e98f04f9 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_clock.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_clock.c
@@ -211,6 +211,8 @@ int main(void)
vm_vaddr_t tsc_page_gva;
int stage;
+ TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_TIME));
+
vm = vm_create_with_one_vcpu(&vcpu, guest_main);
vcpu_set_hv_cpuid(vcpu);
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
index 7bde0c4dfdbd..4c7257ecd2a6 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
@@ -240,11 +240,12 @@ int main(int argc, char *argv[])
struct ucall uc;
int stage;
- vm = vm_create_with_one_vcpu(&vcpu, guest_code);
-
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
TEST_REQUIRE(kvm_has_cap(KVM_CAP_NESTED_STATE));
TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS));
+ TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_DIRECT_TLBFLUSH));
+
+ vm = vm_create_with_one_vcpu(&vcpu, guest_code);
hcall_page = vm_vaddr_alloc_pages(vm, 1);
memset(addr_gva2hva(vm, hcall_page), 0x0, getpagesize());
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_extended_hypercalls.c b/tools/testing/selftests/kvm/x86_64/hyperv_extended_hypercalls.c
index e036db1f32b9..949e08e98f31 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_extended_hypercalls.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_extended_hypercalls.c
@@ -43,6 +43,8 @@ int main(void)
uint64_t *outval;
struct ucall uc;
+ TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_CPUID));
+
/* Verify if extended hypercalls are supported */
if (!kvm_cpuid_has(kvm_get_supported_hv_cpuid(),
HV_ENABLE_EXTENDED_HYPERCALLS)) {
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_features.c b/tools/testing/selftests/kvm/x86_64/hyperv_features.c
index 9f28aa276c4e..387c605a3077 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_features.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_features.c
@@ -690,6 +690,8 @@ static void guest_test_hcalls_access(void)
int main(void)
{
+ TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_ENFORCE_CPUID));
+
pr_info("Testing access to Hyper-V specific MSRs\n");
guest_test_msrs_access();
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
index 6feb5ddb031d..65e5f4c05068 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
@@ -248,6 +248,8 @@ int main(int argc, char *argv[])
int stage = 1, r;
struct ucall uc;
+ TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_SEND_IPI));
+
vm = vm_create_with_one_vcpu(&vcpu[0], sender_guest_code);
/* Hypercall input/output */
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
index 6c1278562090..c9b18707edc0 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
@@ -158,6 +158,7 @@ int main(int argc, char *argv[])
int stage;
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SVM));
+ TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_DIRECT_TLBFLUSH));
/* Create VM */
vm = vm_create_with_one_vcpu(&vcpu, guest_code);
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
index 4758b6ef5618..c4443f71f8dd 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c
@@ -590,6 +590,8 @@ int main(int argc, char *argv[])
struct ucall uc;
int stage = 1, r, i;
+ TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_TLBFLUSH));
+
vm = vm_create_with_one_vcpu(&vcpu[0], sender_guest_code);
/* Test data page */
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 10/16] KVM: selftests: Fix vmxon_pa == vmcs12_pa == -1ull vmx_set_nested_state_test for !eVMCS case
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (8 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 09/16] KVM: selftests: Make all Hyper-V tests explicitly dependent on Hyper-V emulation support in KVM Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 11/16] KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h Vitaly Kuznetsov
` (6 subsequent siblings)
16 siblings, 0 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
The "vmxon_pa == vmcs12_pa == -1ull" test happens to work by accident: as
Enlightened VMCS is always supported, set_default_vmx_state() adds
'KVM_STATE_NESTED_EVMCS' to 'flags' and the following branch of
vmx_set_nested_state() is executed:
if ((kvm_state->flags & KVM_STATE_NESTED_EVMCS) &&
(!guest_can_use(vcpu, X86_FEATURE_VMX) ||
!vmx->nested.enlightened_vmcs_enabled))
return -EINVAL;
as 'enlightened_vmcs_enabled' is false. In fact, "vmxon_pa == vmcs12_pa ==
-1ull" is a valid state when not tainted by wrong flags so the test should
aim for this branch:
if (kvm_state->hdr.vmx.vmxon_pa == INVALID_GPA)
return 0;
Test all this properly:
- Without KVM_STATE_NESTED_EVMCS in the flags, the expected return value is
'0'.
- With KVM_STATE_NESTED_EVMCS flag (when supported) set, the expected
return value is '-EINVAL' prior to enabling eVMCS and '0' after.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
.../kvm/x86_64/vmx_set_nested_state_test.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c b/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c
index 41ea7028a1f8..67a62a5a8895 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c
@@ -125,21 +125,25 @@ void test_vmx_nested_state(struct kvm_vcpu *vcpu)
/*
* Setting vmxon_pa == -1ull and vmcs_pa == -1ull exits early without
- * setting the nested state but flags other than eVMCS must be clear.
- * The eVMCS flag can be set if the enlightened VMCS capability has
- * been enabled.
+ * setting the nested state. When the eVMCS flag is not set, the
+ * expected return value is '0'.
*/
set_default_vmx_state(state, state_sz);
+ state->flags = 0;
state->hdr.vmx.vmxon_pa = -1ull;
state->hdr.vmx.vmcs12_pa = -1ull;
- test_nested_state_expect_einval(vcpu, state);
+ test_nested_state(vcpu, state);
- state->flags &= KVM_STATE_NESTED_EVMCS;
+ /*
+ * When eVMCS is supported, the eVMCS flag can only be set if the
+ * enlightened VMCS capability has been enabled.
+ */
if (have_evmcs) {
+ state->flags = KVM_STATE_NESTED_EVMCS;
test_nested_state_expect_einval(vcpu, state);
vcpu_enable_evmcs(vcpu);
+ test_nested_state(vcpu, state);
}
- test_nested_state(vcpu, state);
/* It is invalid to have vmxon_pa == -1ull and SMM flags non-zero. */
state->hdr.vmx.smm.flags = 1;
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 11/16] KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (9 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 10/16] KVM: selftests: Fix vmxon_pa == vmcs12_pa == -1ull vmx_set_nested_state_test for !eVMCS case Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 12:05 ` Maxim Levitsky
2023-12-05 10:36 ` [PATCH v2 12/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (5 subsequent siblings)
16 siblings, 1 reply; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
In preparation for making Hyper-V emulation optional, move Hyper-V specific
guest_cpuid_has_evmcs() to hyperv.h.
No functional change intended.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/vmx/hyperv.h | 11 +++++++++++
arch/x86/kvm/vmx/vmx.h | 10 ----------
2 files changed, 11 insertions(+), 10 deletions(-)
diff --git a/arch/x86/kvm/vmx/hyperv.h b/arch/x86/kvm/vmx/hyperv.h
index d4ed99008518..6e1ee951e360 100644
--- a/arch/x86/kvm/vmx/hyperv.h
+++ b/arch/x86/kvm/vmx/hyperv.h
@@ -4,6 +4,7 @@
#include <linux/kvm_host.h>
#include "vmcs12.h"
+#include "vmx.h"
#define EVMPTR_INVALID (-1ULL)
#define EVMPTR_MAP_PENDING (-2ULL)
@@ -20,6 +21,16 @@ enum nested_evmptrld_status {
EVMPTRLD_ERROR,
};
+static inline bool guest_cpuid_has_evmcs(struct kvm_vcpu *vcpu)
+{
+ /*
+ * eVMCS is exposed to the guest if Hyper-V is enabled in CPUID and
+ * eVMCS has been explicitly enabled by userspace.
+ */
+ return vcpu->arch.hyperv_enabled &&
+ to_vmx(vcpu)->nested.enlightened_vmcs_enabled;
+}
+
u64 nested_get_evmptr(struct kvm_vcpu *vcpu);
uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu);
int nested_enable_evmcs(struct kvm_vcpu *vcpu,
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index c2130d2c8e24..959c6d94287f 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -745,14 +745,4 @@ static inline bool vmx_can_use_ipiv(struct kvm_vcpu *vcpu)
return lapic_in_kernel(vcpu) && enable_ipiv;
}
-static inline bool guest_cpuid_has_evmcs(struct kvm_vcpu *vcpu)
-{
- /*
- * eVMCS is exposed to the guest if Hyper-V is enabled in CPUID and
- * eVMCS has been explicitly enabled by userspace.
- */
- return vcpu->arch.hyperv_enabled &&
- to_vmx(vcpu)->nested.enlightened_vmcs_enabled;
-}
-
#endif /* __KVM_X86_VMX_H */
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 12/16] KVM: x86: Make Hyper-V emulation optional
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (10 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 11/16] KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 14:52 ` Maxim Levitsky
` (2 more replies)
2023-12-05 10:36 ` [PATCH v2 13/16] KVM: nVMX: hyper-v: Introduce nested_vmx_is_evmptr12_{valid,set}() helpers Vitaly Kuznetsov
` (4 subsequent siblings)
16 siblings, 3 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
Hyper-V emulation in KVM is a fairly big chunk and in some cases it may be
desirable to not compile it in to reduce module sizes as well as the attack
surface. Introduce CONFIG_KVM_HYPERV option to make it possible.
Note, there's room for further nVMX/nSVM code optimizations when
!CONFIG_KVM_HYPERV, this will be done in follow-up patches.
Reorganize Makefile a bit so all CONFIG_HYPERV and CONFIG_KVM_HYPERV files
are grouped together.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/include/asm/kvm_host.h | 6 ++++
arch/x86/kvm/Kconfig | 14 ++++++++
arch/x86/kvm/Makefile | 20 +++++------
arch/x86/kvm/cpuid.c | 6 ++++
arch/x86/kvm/hyperv.h | 61 +++++++++++++++++++++++++++++++-
arch/x86/kvm/irq_comm.c | 9 ++++-
arch/x86/kvm/svm/hyperv.h | 9 +++++
arch/x86/kvm/vmx/hyperv.h | 17 ++++++---
arch/x86/kvm/vmx/nested.c | 30 ++++++++++++++++
arch/x86/kvm/vmx/vmx.c | 2 ++
arch/x86/kvm/x86.c | 62 ++++++++++++++++++++++++---------
11 files changed, 201 insertions(+), 35 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 9dab2f7de495..3b8c63767554 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -937,8 +937,10 @@ struct kvm_vcpu_arch {
/* used for guest single stepping over the given code position */
unsigned long singlestep_rip;
+#ifdef CONFIG_KVM_HYPERV
bool hyperv_enabled;
struct kvm_vcpu_hv *hyperv;
+#endif
#ifdef CONFIG_KVM_XEN
struct kvm_vcpu_xen xen;
#endif
@@ -1095,6 +1097,7 @@ enum hv_tsc_page_status {
HV_TSC_PAGE_BROKEN,
};
+#ifdef CONFIG_KVM_HYPERV
/* Hyper-V emulation context */
struct kvm_hv {
struct mutex hv_lock;
@@ -1127,6 +1130,7 @@ struct kvm_hv {
struct kvm_hv_syndbg hv_syndbg;
};
+#endif
struct msr_bitmap_range {
u32 flags;
@@ -1349,7 +1353,9 @@ struct kvm_arch {
/* reads protected by irq_srcu, writes by irq_lock */
struct hlist_head mask_notifier_list;
+#ifdef CONFIG_KVM_HYPERV
struct kvm_hv hyperv;
+#endif
#ifdef CONFIG_KVM_XEN
struct kvm_xen xen;
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index c1716e83d176..34f2f47cadf2 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -141,6 +141,20 @@ config KVM_SMM
If unsure, say Y.
+config KVM_HYPERV
+ bool "Support for Microsoft Hyper-V emulation"
+ depends on KVM
+ default y
+ help
+ Provides KVM support for emulating Microsoft Hyper-V. This allows KVM
+ to expose a subset of the paravirtualized interfaces defined in the
+ Hyper-V Hypervisor Top-Level Functional Specification (TLFS):
+ https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs
+ These interfaces are required for the correct and performant functioning
+ of Windows and Hyper-V guests on KVM.
+
+ If unsure, say "Y".
+
config KVM_XEN
bool "Support for Xen hypercall interface"
depends on KVM
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index 8ea872401cd6..475b5fa917a6 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -11,29 +11,27 @@ include $(srctree)/virt/kvm/Makefile.kvm
kvm-y += x86.o emulate.o i8259.o irq.o lapic.o \
i8254.o ioapic.o irq_comm.o cpuid.o pmu.o mtrr.o \
- hyperv.o debugfs.o mmu/mmu.o mmu/page_track.o \
+ debugfs.o mmu/mmu.o mmu/page_track.o \
mmu/spte.o
-ifdef CONFIG_HYPERV
-kvm-y += kvm_onhyperv.o
-endif
-
kvm-$(CONFIG_X86_64) += mmu/tdp_iter.o mmu/tdp_mmu.o
+kvm-$(CONFIG_KVM_HYPERV) += hyperv.o
kvm-$(CONFIG_KVM_XEN) += xen.o
kvm-$(CONFIG_KVM_SMM) += smm.o
kvm-intel-y += vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o vmx/vmcs12.o \
- vmx/hyperv.o vmx/hyperv_evmcs.o vmx/nested.o vmx/posted_intr.o
-kvm-intel-$(CONFIG_X86_SGX_KVM) += vmx/sgx.o
+ vmx/nested.o vmx/posted_intr.o
-ifdef CONFIG_HYPERV
-kvm-intel-y += vmx/vmx_onhyperv.o
-endif
+kvm-intel-$(CONFIG_X86_SGX_KVM) += vmx/sgx.o
+kvm-intel-$(CONFIG_KVM_HYPERV) += vmx/hyperv.o vmx/hyperv_evmcs.o
kvm-amd-y += svm/svm.o svm/vmenter.o svm/pmu.o svm/nested.o svm/avic.o \
- svm/sev.o svm/hyperv.o
+ svm/sev.o
+kvm-amd-$(CONFIG_KVM_HYPERV) += svm/hyperv.o
ifdef CONFIG_HYPERV
+kvm-y += kvm_onhyperv.o
+kvm-intel-y += vmx/vmx_onhyperv.o vmx/hyperv_evmcs.o
kvm-amd-y += svm/svm_onhyperv.o
endif
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index dda6fc4cfae8..1b278a3f0689 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -314,11 +314,15 @@ EXPORT_SYMBOL_GPL(kvm_update_cpuid_runtime);
static bool kvm_cpuid_has_hyperv(struct kvm_cpuid_entry2 *entries, int nent)
{
+#ifdef CONFIG_KVM_HYPERV
struct kvm_cpuid_entry2 *entry;
entry = cpuid_entry2_find(entries, nent, HYPERV_CPUID_INTERFACE,
KVM_CPUID_INDEX_NOT_SIGNIFICANT);
return entry && entry->eax == HYPERV_CPUID_SIGNATURE_EAX;
+#else
+ return false;
+#endif
}
static void kvm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
@@ -433,11 +437,13 @@ static int kvm_set_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid_entry2 *e2,
return 0;
}
+#ifdef CONFIG_KVM_HYPERV
if (kvm_cpuid_has_hyperv(e2, nent)) {
r = kvm_hv_vcpu_init(vcpu);
if (r)
return r;
}
+#endif
r = kvm_check_cpuid(vcpu, e2, nent);
if (r)
diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h
index 75dcbe598fbc..53eb3bf56bdf 100644
--- a/arch/x86/kvm/hyperv.h
+++ b/arch/x86/kvm/hyperv.h
@@ -24,6 +24,8 @@
#include <linux/kvm_host.h>
#include "x86.h"
+#ifdef CONFIG_KVM_HYPERV
+
/* "Hv#1" signature */
#define HYPERV_CPUID_SIGNATURE_EAX 0x31237648
@@ -259,5 +261,62 @@ static inline void kvm_hv_nested_transtion_tlb_flush(struct kvm_vcpu *vcpu, bool
}
int kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu);
+#else /* CONFIG_KVM_HYPERV */
+static inline void kvm_hv_setup_tsc_page(struct kvm *kvm,
+ struct pvclock_vcpu_time_info *hv_clock) {}
+static inline void kvm_hv_request_tsc_page_update(struct kvm *kvm) {}
+static inline void kvm_hv_init_vm(struct kvm *kvm) {}
+static inline void kvm_hv_destroy_vm(struct kvm *kvm) {}
+static inline int kvm_hv_vcpu_init(struct kvm_vcpu *vcpu)
+{
+ return 0;
+}
+static inline void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu) {}
+static inline bool kvm_hv_hypercall_enabled(struct kvm_vcpu *vcpu)
+{
+ return false;
+}
+static inline int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
+{
+ return HV_STATUS_ACCESS_DENIED;
+}
+static inline void kvm_hv_vcpu_purge_flush_tlb(struct kvm_vcpu *vcpu) {}
+static inline void kvm_hv_free_pa_page(struct kvm *kvm) {}
+static inline bool kvm_hv_synic_has_vector(struct kvm_vcpu *vcpu, int vector)
+{
+ return false;
+}
+static inline bool kvm_hv_synic_auto_eoi_set(struct kvm_vcpu *vcpu, int vector)
+{
+ return false;
+}
+static inline void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector) {}
+static inline bool kvm_hv_invtsc_suppressed(struct kvm_vcpu *vcpu)
+{
+ return false;
+}
+static inline void kvm_hv_set_cpuid(struct kvm_vcpu *vcpu, bool hyperv_enabled) {}
+static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu)
+{
+ return false;
+}
+static inline bool kvm_hv_is_tlb_flush_hcall(struct kvm_vcpu *vcpu)
+{
+ return false;
+}
+static inline bool guest_hv_cpuid_has_l2_tlb_flush(struct kvm_vcpu *vcpu)
+{
+ return false;
+}
+static inline int kvm_hv_verify_vp_assist(struct kvm_vcpu *vcpu)
+{
+ return 0;
+}
+static inline u32 kvm_hv_get_vpindex(struct kvm_vcpu *vcpu)
+{
+ return vcpu->vcpu_idx;
+}
+static inline void kvm_hv_nested_transtion_tlb_flush(struct kvm_vcpu *vcpu, bool tdp_enabled) {}
+#endif /* CONFIG_KVM_HYPERV */
-#endif
+#endif /* __ARCH_X86_KVM_HYPERV_H__ */
diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
index 16d076a1b91a..68f3f6c26046 100644
--- a/arch/x86/kvm/irq_comm.c
+++ b/arch/x86/kvm/irq_comm.c
@@ -144,7 +144,7 @@ int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
return kvm_irq_delivery_to_apic(kvm, NULL, &irq, NULL);
}
-
+#ifdef CONFIG_KVM_HYPERV
static int kvm_hv_set_sint(struct kvm_kernel_irq_routing_entry *e,
struct kvm *kvm, int irq_source_id, int level,
bool line_status)
@@ -154,6 +154,7 @@ static int kvm_hv_set_sint(struct kvm_kernel_irq_routing_entry *e,
return kvm_hv_synic_set_irq(kvm, e->hv_sint.vcpu, e->hv_sint.sint);
}
+#endif
int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
struct kvm *kvm, int irq_source_id, int level,
@@ -163,9 +164,11 @@ int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
int r;
switch (e->type) {
+#ifdef CONFIG_KVM_HYPERV
case KVM_IRQ_ROUTING_HV_SINT:
return kvm_hv_set_sint(e, kvm, irq_source_id, level,
line_status);
+#endif
case KVM_IRQ_ROUTING_MSI:
if (kvm_msi_route_invalid(kvm, e))
@@ -314,11 +317,13 @@ int kvm_set_routing_entry(struct kvm *kvm,
if (kvm_msi_route_invalid(kvm, e))
return -EINVAL;
break;
+#ifdef CONFIG_KVM_HYPERV
case KVM_IRQ_ROUTING_HV_SINT:
e->set = kvm_hv_set_sint;
e->hv_sint.vcpu = ue->u.hv_sint.vcpu;
e->hv_sint.sint = ue->u.hv_sint.sint;
break;
+#endif
#ifdef CONFIG_KVM_XEN
case KVM_IRQ_ROUTING_XEN_EVTCHN:
return kvm_xen_setup_evtchn(kvm, e, ue);
@@ -438,5 +443,7 @@ void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
void kvm_arch_irq_routing_update(struct kvm *kvm)
{
+#ifdef CONFIG_KVM_HYPERV
kvm_hv_irq_routing_update(kvm);
+#endif
}
diff --git a/arch/x86/kvm/svm/hyperv.h b/arch/x86/kvm/svm/hyperv.h
index 02f4784b5d44..d3f8bfc05832 100644
--- a/arch/x86/kvm/svm/hyperv.h
+++ b/arch/x86/kvm/svm/hyperv.h
@@ -11,6 +11,7 @@
#include "../hyperv.h"
#include "svm.h"
+#ifdef CONFIG_KVM_HYPERV
static inline void nested_svm_hv_update_vm_vp_ids(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
@@ -41,5 +42,13 @@ static inline bool nested_svm_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu)
}
void svm_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu);
+#else /* CONFIG_KVM_HYPERV */
+static inline void nested_svm_hv_update_vm_vp_ids(struct kvm_vcpu *vcpu) {}
+static inline bool nested_svm_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu)
+{
+ return false;
+}
+static inline void svm_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu) {}
+#endif /* CONFIG_KVM_HYPERV */
#endif /* __ARCH_X86_KVM_SVM_HYPERV_H__ */
diff --git a/arch/x86/kvm/vmx/hyperv.h b/arch/x86/kvm/vmx/hyperv.h
index 6e1ee951e360..0e90ef4efe34 100644
--- a/arch/x86/kvm/vmx/hyperv.h
+++ b/arch/x86/kvm/vmx/hyperv.h
@@ -9,11 +9,6 @@
#define EVMPTR_INVALID (-1ULL)
#define EVMPTR_MAP_PENDING (-2ULL)
-static inline bool evmptr_is_valid(u64 evmptr)
-{
- return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
-}
-
enum nested_evmptrld_status {
EVMPTRLD_DISABLED,
EVMPTRLD_SUCCEEDED,
@@ -21,6 +16,12 @@ enum nested_evmptrld_status {
EVMPTRLD_ERROR,
};
+#ifdef CONFIG_KVM_HYPERV
+static inline bool evmptr_is_valid(u64 evmptr)
+{
+ return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
+}
+
static inline bool guest_cpuid_has_evmcs(struct kvm_vcpu *vcpu)
{
/*
@@ -39,5 +40,11 @@ void nested_evmcs_filter_control_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *
int nested_evmcs_check_controls(struct vmcs12 *vmcs12);
bool nested_evmcs_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu);
void vmx_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu);
+#else
+static inline bool evmptr_is_valid(u64 evmptr)
+{
+ return false;
+}
+#endif
#endif /* __KVM_X86_VMX_HYPERV_H */
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 903b6f9ea2bd..01a94d290c12 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -226,6 +226,7 @@ static void vmx_disable_shadow_vmcs(struct vcpu_vmx *vmx)
static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
{
+#ifdef CONFIG_KVM_HYPERV
struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
struct vcpu_vmx *vmx = to_vmx(vcpu);
@@ -241,10 +242,12 @@ static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
hv_vcpu->nested.vm_id = 0;
hv_vcpu->nested.vp_id = 0;
}
+#endif
}
static bool nested_evmcs_handle_vmclear(struct kvm_vcpu *vcpu, gpa_t vmptr)
{
+#ifdef CONFIG_KVM_HYPERV
struct vcpu_vmx *vmx = to_vmx(vcpu);
/*
* When Enlightened VMEntry is enabled on the calling CPU we treat
@@ -264,6 +267,9 @@ static bool nested_evmcs_handle_vmclear(struct kvm_vcpu *vcpu, gpa_t vmptr)
nested_release_evmcs(vcpu);
return true;
+#else
+ return false;
+#endif
}
static void vmx_sync_vmcs_host_state(struct vcpu_vmx *vmx,
@@ -1595,6 +1601,7 @@ static void copy_vmcs12_to_shadow(struct vcpu_vmx *vmx)
static void copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx, u32 hv_clean_fields)
{
+#ifdef CONFIG_KVM_HYPERV
struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12;
struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(&vmx->vcpu);
@@ -1835,10 +1842,14 @@ static void copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx, u32 hv_clean_fields
*/
return;
+#else /* CONFIG_KVM_HYPERV */
+ KVM_BUG_ON(1, vmx->vcpu.kvm);
+#endif /* CONFIG_KVM_HYPERV */
}
static void copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
{
+#ifdef CONFIG_KVM_HYPERV
struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12;
struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
@@ -2009,6 +2020,9 @@ static void copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
evmcs->guest_bndcfgs = vmcs12->guest_bndcfgs;
return;
+#else /* CONFIG_KVM_HYPERV */
+ KVM_BUG_ON(1, vmx->vcpu.kvm);
+#endif /* CONFIG_KVM_HYPERV */
}
/*
@@ -2018,6 +2032,7 @@ static void copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
static enum nested_evmptrld_status nested_vmx_handle_enlightened_vmptrld(
struct kvm_vcpu *vcpu, bool from_launch)
{
+#ifdef CONFIG_KVM_HYPERV
struct vcpu_vmx *vmx = to_vmx(vcpu);
bool evmcs_gpa_changed = false;
u64 evmcs_gpa;
@@ -2099,6 +2114,9 @@ static enum nested_evmptrld_status nested_vmx_handle_enlightened_vmptrld(
}
return EVMPTRLD_SUCCEEDED;
+#else
+ return EVMPTRLD_DISABLED;
+#endif
}
void nested_sync_vmcs12_to_shadow(struct kvm_vcpu *vcpu)
@@ -2905,8 +2923,10 @@ static int nested_vmx_check_controls(struct kvm_vcpu *vcpu,
nested_check_vm_entry_controls(vcpu, vmcs12))
return -EINVAL;
+#ifdef CONFIG_KVM_HYPERV
if (guest_cpuid_has_evmcs(vcpu))
return nested_evmcs_check_controls(vmcs12);
+#endif
return 0;
}
@@ -3178,6 +3198,7 @@ static int nested_vmx_check_vmentry_hw(struct kvm_vcpu *vcpu)
return 0;
}
+#ifdef CONFIG_KVM_HYPERV
static bool nested_get_evmcs_page(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
@@ -3205,6 +3226,7 @@ static bool nested_get_evmcs_page(struct kvm_vcpu *vcpu)
return true;
}
+#endif
static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu)
{
@@ -3296,6 +3318,7 @@ static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu)
static bool vmx_get_nested_state_pages(struct kvm_vcpu *vcpu)
{
+#ifdef CONFIG_KVM_HYPERV
/*
* Note: nested_get_evmcs_page() also updates 'vp_assist_page' copy
* in 'struct kvm_vcpu_hv' in case eVMCS is in use, this is mandatory
@@ -3312,6 +3335,7 @@ static bool vmx_get_nested_state_pages(struct kvm_vcpu *vcpu)
return false;
}
+#endif
if (is_guest_mode(vcpu) && !nested_get_vmcs12_pages(vcpu))
return false;
@@ -4749,6 +4773,7 @@ void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
/* trying to cancel vmlaunch/vmresume is a bug */
WARN_ON_ONCE(vmx->nested.nested_run_pending);
+#ifdef CONFIG_KVM_HYPERV
if (kvm_check_request(KVM_REQ_GET_NESTED_STATE_PAGES, vcpu)) {
/*
* KVM_REQ_GET_NESTED_STATE_PAGES is also used to map
@@ -4758,6 +4783,7 @@ void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
*/
(void)nested_get_evmcs_page(vcpu);
}
+#endif
/* Service pending TLB flush requests for L2 before switching to L1. */
kvm_service_local_tlb_flush_requests(vcpu);
@@ -6212,11 +6238,13 @@ static bool nested_vmx_l0_wants_exit(struct kvm_vcpu *vcpu,
* Handle L2's bus locks in L0 directly.
*/
return true;
+#ifdef CONFIG_KVM_HYPERV
case EXIT_REASON_VMCALL:
/* Hyper-V L2 TLB flush hypercall is handled by L0 */
return guest_hv_cpuid_has_l2_tlb_flush(vcpu) &&
nested_evmcs_l2_tlb_flush_enabled(vcpu) &&
kvm_hv_is_tlb_flush_hcall(vcpu);
+#endif
default:
break;
}
@@ -7100,7 +7128,9 @@ struct kvm_x86_nested_ops vmx_nested_ops = {
.set_state = vmx_set_nested_state,
.get_nested_state_pages = vmx_get_nested_state_pages,
.write_log_dirty = nested_vmx_write_pml_buffer,
+#ifdef CONFIG_KVM_HYPERV
.enable_evmcs = nested_enable_evmcs,
.get_evmcs_version = nested_get_evmcs_version,
.hv_inject_synthetic_vmexit_post_tlb_flush = vmx_hv_inject_synthetic_vmexit_post_tlb_flush,
+#endif
};
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 552593a2ac14..3ff5c44dff9d 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2048,6 +2048,7 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
if (vmx_get_vmx_msr(&vmx->nested.msrs, msr_info->index,
&msr_info->data))
return 1;
+#ifdef CONFIG_KVM_HYPERV
/*
* Enlightened VMCS v1 doesn't have certain VMCS fields but
* instead of just ignoring the features, different Hyper-V
@@ -2058,6 +2059,7 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
if (!msr_info->host_initiated && guest_cpuid_has_evmcs(vcpu))
nested_evmcs_filter_control_msr(vcpu, msr_info->index,
&msr_info->data);
+#endif
break;
case MSR_IA32_RTIT_CTL:
if (!vmx_pt_mode_is_host_guest())
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 81224b9676d9..598b057611e0 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1504,6 +1504,8 @@ static unsigned num_msrs_to_save;
static const u32 emulated_msrs_all[] = {
MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW,
+
+#ifdef CONFIG_KVM_HYPERV
HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL,
HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC,
HV_X64_MSR_TSC_FREQUENCY, HV_X64_MSR_APIC_FREQUENCY,
@@ -1521,6 +1523,7 @@ static const u32 emulated_msrs_all[] = {
HV_X64_MSR_SYNDBG_CONTROL, HV_X64_MSR_SYNDBG_STATUS,
HV_X64_MSR_SYNDBG_SEND_BUFFER, HV_X64_MSR_SYNDBG_RECV_BUFFER,
HV_X64_MSR_SYNDBG_PENDING_BUFFER,
+#endif
MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME,
MSR_KVM_PV_EOI_EN, MSR_KVM_ASYNC_PF_INT, MSR_KVM_ASYNC_PF_ACK,
@@ -4020,6 +4023,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
* the need to ignore the workaround.
*/
break;
+#ifdef CONFIG_KVM_HYPERV
case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
case HV_X64_MSR_SYNDBG_OPTIONS:
@@ -4032,6 +4036,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
case HV_X64_MSR_TSC_INVARIANT_CONTROL:
return kvm_hv_set_msr_common(vcpu, msr, data,
msr_info->host_initiated);
+#endif
case MSR_IA32_BBL_CR_CTL3:
/* Drop writes to this legacy MSR -- see rdmsr
* counterpart for further detail.
@@ -4377,6 +4382,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
*/
msr_info->data = 0x20000000;
break;
+#ifdef CONFIG_KVM_HYPERV
case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
case HV_X64_MSR_SYNDBG_OPTIONS:
@@ -4390,6 +4396,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
return kvm_hv_get_msr_common(vcpu,
msr_info->index, &msr_info->data,
msr_info->host_initiated);
+#endif
case MSR_IA32_BBL_CR_CTL3:
/* This legacy MSR exists but isn't fully documented in current
* silicon. It is however accessed by winxp in very narrow
@@ -4527,6 +4534,7 @@ static inline bool kvm_can_mwait_in_guest(void)
boot_cpu_has(X86_FEATURE_ARAT);
}
+#ifdef CONFIG_KVM_HYPERV
static int kvm_ioctl_get_supported_hv_cpuid(struct kvm_vcpu *vcpu,
struct kvm_cpuid2 __user *cpuid_arg)
{
@@ -4547,6 +4555,7 @@ static int kvm_ioctl_get_supported_hv_cpuid(struct kvm_vcpu *vcpu,
return 0;
}
+#endif
static bool kvm_is_vm_type_supported(unsigned long type)
{
@@ -4580,9 +4589,11 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_PIT_STATE2:
case KVM_CAP_SET_IDENTITY_MAP_ADDR:
case KVM_CAP_VCPU_EVENTS:
+#ifdef CONFIG_KVM_HYPERV
case KVM_CAP_HYPERV:
case KVM_CAP_HYPERV_VAPIC:
case KVM_CAP_HYPERV_SPIN:
+ case KVM_CAP_HYPERV_TIME:
case KVM_CAP_HYPERV_SYNIC:
case KVM_CAP_HYPERV_SYNIC2:
case KVM_CAP_HYPERV_VP_INDEX:
@@ -4592,6 +4603,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_HYPERV_CPUID:
case KVM_CAP_HYPERV_ENFORCE_CPUID:
case KVM_CAP_SYS_HYPERV_CPUID:
+#endif
case KVM_CAP_PCI_SEGMENT:
case KVM_CAP_DEBUGREGS:
case KVM_CAP_X86_ROBUST_SINGLESTEP:
@@ -4601,7 +4613,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_GET_TSC_KHZ:
case KVM_CAP_KVMCLOCK_CTRL:
case KVM_CAP_READONLY_MEM:
- case KVM_CAP_HYPERV_TIME:
case KVM_CAP_IOAPIC_POLARITY_IGNORED:
case KVM_CAP_TSC_DEADLINE_TIMER:
case KVM_CAP_DISABLE_QUIRKS:
@@ -4712,12 +4723,14 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = kvm_x86_ops.nested_ops->get_state ?
kvm_x86_ops.nested_ops->get_state(NULL, NULL, 0) : 0;
break;
+#ifdef CONFIG_KVM_HYPERV
case KVM_CAP_HYPERV_DIRECT_TLBFLUSH:
r = kvm_x86_ops.enable_l2_tlb_flush != NULL;
break;
case KVM_CAP_HYPERV_ENLIGHTENED_VMCS:
r = kvm_x86_ops.nested_ops->enable_evmcs != NULL;
break;
+#endif
case KVM_CAP_SMALLER_MAXPHYADDR:
r = (int) allow_smaller_maxphyaddr;
break;
@@ -4884,9 +4897,11 @@ long kvm_arch_dev_ioctl(struct file *filp,
case KVM_GET_MSRS:
r = msr_io(NULL, argp, do_get_msr_feature, 1);
break;
+#ifdef CONFIG_KVM_HYPERV
case KVM_GET_SUPPORTED_HV_CPUID:
r = kvm_ioctl_get_supported_hv_cpuid(NULL, argp);
break;
+#endif
case KVM_GET_DEVICE_ATTR: {
struct kvm_device_attr attr;
r = -EFAULT;
@@ -5712,14 +5727,11 @@ static int kvm_vcpu_ioctl_device_attr(struct kvm_vcpu *vcpu,
static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
struct kvm_enable_cap *cap)
{
- int r;
- uint16_t vmcs_version;
- void __user *user_ptr;
-
if (cap->flags)
return -EINVAL;
switch (cap->cap) {
+#ifdef CONFIG_KVM_HYPERV
case KVM_CAP_HYPERV_SYNIC2:
if (cap->args[0])
return -EINVAL;
@@ -5731,16 +5743,22 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
return kvm_hv_activate_synic(vcpu, cap->cap ==
KVM_CAP_HYPERV_SYNIC2);
case KVM_CAP_HYPERV_ENLIGHTENED_VMCS:
- if (!kvm_x86_ops.nested_ops->enable_evmcs)
- return -ENOTTY;
- r = kvm_x86_ops.nested_ops->enable_evmcs(vcpu, &vmcs_version);
- if (!r) {
- user_ptr = (void __user *)(uintptr_t)cap->args[0];
- if (copy_to_user(user_ptr, &vmcs_version,
- sizeof(vmcs_version)))
- r = -EFAULT;
+ {
+ int r;
+ uint16_t vmcs_version;
+ void __user *user_ptr;
+
+ if (!kvm_x86_ops.nested_ops->enable_evmcs)
+ return -ENOTTY;
+ r = kvm_x86_ops.nested_ops->enable_evmcs(vcpu, &vmcs_version);
+ if (!r) {
+ user_ptr = (void __user *)(uintptr_t)cap->args[0];
+ if (copy_to_user(user_ptr, &vmcs_version,
+ sizeof(vmcs_version)))
+ r = -EFAULT;
+ }
+ return r;
}
- return r;
case KVM_CAP_HYPERV_DIRECT_TLBFLUSH:
if (!kvm_x86_ops.enable_l2_tlb_flush)
return -ENOTTY;
@@ -5749,6 +5767,7 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
case KVM_CAP_HYPERV_ENFORCE_CPUID:
return kvm_hv_set_enforce_cpuid(vcpu, cap->args[0]);
+#endif
case KVM_CAP_ENFORCE_PV_FEATURE_CPUID:
vcpu->arch.pv_cpuid.enforce = cap->args[0];
@@ -6141,9 +6160,11 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
srcu_read_unlock(&vcpu->kvm->srcu, idx);
break;
}
+#ifdef CONFIG_KVM_HYPERV
case KVM_GET_SUPPORTED_HV_CPUID:
r = kvm_ioctl_get_supported_hv_cpuid(vcpu, argp);
break;
+#endif
#ifdef CONFIG_KVM_XEN
case KVM_XEN_VCPU_GET_ATTR: {
struct kvm_xen_vcpu_attr xva;
@@ -7201,6 +7222,7 @@ int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
r = static_call(kvm_x86_mem_enc_unregister_region)(kvm, ®ion);
break;
}
+#ifdef CONFIG_KVM_HYPERV
case KVM_HYPERV_EVENTFD: {
struct kvm_hyperv_eventfd hvevfd;
@@ -7210,6 +7232,7 @@ int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
r = kvm_vm_ioctl_hv_eventfd(kvm, &hvevfd);
break;
}
+#endif
case KVM_SET_PMU_EVENT_FILTER:
r = kvm_vm_ioctl_set_pmu_event_filter(kvm, argp);
break;
@@ -10588,19 +10611,20 @@ static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu)
static void vcpu_load_eoi_exitmap(struct kvm_vcpu *vcpu)
{
- u64 eoi_exit_bitmap[4];
-
if (!kvm_apic_hw_enabled(vcpu->arch.apic))
return;
+#ifdef CONFIG_KVM_HYPERV
if (to_hv_vcpu(vcpu)) {
+ u64 eoi_exit_bitmap[4];
+
bitmap_or((ulong *)eoi_exit_bitmap,
vcpu->arch.ioapic_handled_vectors,
to_hv_synic(vcpu)->vec_bitmap, 256);
static_call_cond(kvm_x86_load_eoi_exitmap)(vcpu, eoi_exit_bitmap);
return;
}
-
+#endif
static_call_cond(kvm_x86_load_eoi_exitmap)(
vcpu, (u64 *)vcpu->arch.ioapic_handled_vectors);
}
@@ -10691,9 +10715,11 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
* the flushes are considered "remote" and not "local" because
* the requests can be initiated from other vCPUs.
*/
+#ifdef CONFIG_KVM_HYPERV
if (kvm_check_request(KVM_REQ_HV_TLB_FLUSH, vcpu) &&
kvm_hv_vcpu_flush_tlb(vcpu))
kvm_vcpu_flush_tlb_guest(vcpu);
+#endif
if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) {
vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS;
@@ -10746,6 +10772,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
vcpu_load_eoi_exitmap(vcpu);
if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu))
kvm_vcpu_reload_apic_access_page(vcpu);
+#ifdef CONFIG_KVM_HYPERV
if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) {
vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT;
vcpu->run->system_event.type = KVM_SYSTEM_EVENT_CRASH;
@@ -10776,6 +10803,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
*/
if (kvm_check_request(KVM_REQ_HV_STIMER, vcpu))
kvm_hv_process_stimers(vcpu);
+#endif
if (kvm_check_request(KVM_REQ_APICV_UPDATE, vcpu))
kvm_vcpu_update_apicv(vcpu);
if (kvm_check_request(KVM_REQ_APF_READY, vcpu))
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 13/16] KVM: nVMX: hyper-v: Introduce nested_vmx_is_evmptr12_{valid,set}() helpers
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (11 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 12/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 14:53 ` Maxim Levitsky
2023-12-05 10:36 ` [PATCH v2 14/16] KVM: nVMX: hyper-v: Introduce nested_vmx_evmcs() accessor Vitaly Kuznetsov
` (3 subsequent siblings)
16 siblings, 1 reply; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
In order to get rid of raw 'vmx->nested.hv_evmcs_vmptr' accesses when
!CONFIG_KVM_HYPERV, introduce a pair of helpers:
nested_vmx_is_evmptr12_valid() to check that eVMPTR points to a valid
address.
nested_vmx_is_evmptr12_valid() to check that eVMPTR either points to a
valid address or is in 'pending' port-migration state (meaning it is
supposed to be valid but the exact address wasn't acquired from guest's
memory yet).
No functional change intended.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/vmx/hyperv.h | 30 ++++++++++++++++++++++++++++++
arch/x86/kvm/vmx/nested.c | 38 +++++++++++++++++++-------------------
arch/x86/kvm/vmx/nested.h | 2 +-
3 files changed, 50 insertions(+), 20 deletions(-)
diff --git a/arch/x86/kvm/vmx/hyperv.h b/arch/x86/kvm/vmx/hyperv.h
index 0e90ef4efe34..71e90a16f183 100644
--- a/arch/x86/kvm/vmx/hyperv.h
+++ b/arch/x86/kvm/vmx/hyperv.h
@@ -22,6 +22,21 @@ static inline bool evmptr_is_valid(u64 evmptr)
return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
}
+static inline bool nested_vmx_is_evmptr12_valid(struct vcpu_vmx *vmx)
+{
+ return evmptr_is_valid(vmx->nested.hv_evmcs_vmptr);
+}
+
+static inline bool evmptr_is_set(u64 evmptr)
+{
+ return evmptr != EVMPTR_INVALID;
+}
+
+static inline bool nested_vmx_is_evmptr12_set(struct vcpu_vmx *vmx)
+{
+ return evmptr_is_set(vmx->nested.hv_evmcs_vmptr);
+}
+
static inline bool guest_cpuid_has_evmcs(struct kvm_vcpu *vcpu)
{
/*
@@ -45,6 +60,21 @@ static inline bool evmptr_is_valid(u64 evmptr)
{
return false;
}
+
+static inline bool nested_vmx_is_evmptr12_valid(struct vcpu_vmx *vmx)
+{
+ return false;
+}
+
+static inline bool evmptr_is_set(u64 evmptr)
+{
+ return false;
+}
+
+static inline bool nested_vmx_is_evmptr12_set(struct vcpu_vmx *vmx)
+{
+ return false;
+}
#endif
#endif /* __KVM_X86_VMX_HYPERV_H */
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 01a94d290c12..0507174750e0 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -179,7 +179,7 @@ static int nested_vmx_failValid(struct kvm_vcpu *vcpu,
* VM_INSTRUCTION_ERROR is not shadowed. Enlightened VMCS 'shadows' all
* fields and thus must be synced.
*/
- if (to_vmx(vcpu)->nested.hv_evmcs_vmptr != EVMPTR_INVALID)
+ if (nested_vmx_is_evmptr12_set(to_vmx(vcpu)))
to_vmx(vcpu)->nested.need_vmcs12_to_shadow_sync = true;
return kvm_skip_emulated_instruction(vcpu);
@@ -194,7 +194,7 @@ static int nested_vmx_fail(struct kvm_vcpu *vcpu, u32 vm_instruction_error)
* can't be done if there isn't a current VMCS.
*/
if (vmx->nested.current_vmptr == INVALID_GPA &&
- !evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
+ !nested_vmx_is_evmptr12_valid(vmx))
return nested_vmx_failInvalid(vcpu);
return nested_vmx_failValid(vcpu, vm_instruction_error);
@@ -230,7 +230,7 @@ static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
struct vcpu_vmx *vmx = to_vmx(vcpu);
- if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr)) {
+ if (nested_vmx_is_evmptr12_valid(vmx)) {
kvm_vcpu_unmap(vcpu, &vmx->nested.hv_evmcs_map, true);
vmx->nested.hv_evmcs = NULL;
}
@@ -2123,7 +2123,7 @@ void nested_sync_vmcs12_to_shadow(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
- if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
+ if (nested_vmx_is_evmptr12_valid(vmx))
copy_vmcs12_to_enlightened(vmx);
else
copy_vmcs12_to_shadow(vmx);
@@ -2277,7 +2277,7 @@ static void prepare_vmcs02_early(struct vcpu_vmx *vmx, struct loaded_vmcs *vmcs0
u32 exec_control;
u64 guest_efer = nested_vmx_calc_efer(vmx, vmcs12);
- if (vmx->nested.dirty_vmcs12 || evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
+ if (vmx->nested.dirty_vmcs12 || nested_vmx_is_evmptr12_valid(vmx))
prepare_vmcs02_early_rare(vmx, vmcs12);
/*
@@ -2572,11 +2572,11 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
struct vcpu_vmx *vmx = to_vmx(vcpu);
bool load_guest_pdptrs_vmcs12 = false;
- if (vmx->nested.dirty_vmcs12 || evmptr_is_valid(vmx->nested.hv_evmcs_vmptr)) {
+ if (vmx->nested.dirty_vmcs12 || nested_vmx_is_evmptr12_valid(vmx)) {
prepare_vmcs02_rare(vmx, vmcs12);
vmx->nested.dirty_vmcs12 = false;
- load_guest_pdptrs_vmcs12 = !evmptr_is_valid(vmx->nested.hv_evmcs_vmptr) ||
+ load_guest_pdptrs_vmcs12 = !nested_vmx_is_evmptr12_valid(vmx) ||
!(vmx->nested.hv_evmcs->hv_clean_fields &
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1);
}
@@ -2699,7 +2699,7 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
* bits when it changes a field in eVMCS. Mark all fields as clean
* here.
*/
- if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
+ if (nested_vmx_is_evmptr12_valid(vmx))
vmx->nested.hv_evmcs->hv_clean_fields |=
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL;
@@ -3579,7 +3579,7 @@ enum nvmx_vmentry_status nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu,
load_vmcs12_host_state(vcpu, vmcs12);
vmcs12->vm_exit_reason = exit_reason.full;
- if (enable_shadow_vmcs || evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
+ if (enable_shadow_vmcs || nested_vmx_is_evmptr12_valid(vmx))
vmx->nested.need_vmcs12_to_shadow_sync = true;
return NVMX_VMENTRY_VMEXIT;
}
@@ -3610,7 +3610,7 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch)
if (CC(evmptrld_status == EVMPTRLD_VMFAIL))
return nested_vmx_failInvalid(vcpu);
- if (CC(!evmptr_is_valid(vmx->nested.hv_evmcs_vmptr) &&
+ if (CC(!nested_vmx_is_evmptr12_valid(vmx) &&
vmx->nested.current_vmptr == INVALID_GPA))
return nested_vmx_failInvalid(vcpu);
@@ -3625,7 +3625,7 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch)
if (CC(vmcs12->hdr.shadow_vmcs))
return nested_vmx_failInvalid(vcpu);
- if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr)) {
+ if (nested_vmx_is_evmptr12_valid(vmx)) {
copy_enlightened_to_vmcs12(vmx, vmx->nested.hv_evmcs->hv_clean_fields);
/* Enlightened VMCS doesn't have launch state */
vmcs12->launch_state = !launch;
@@ -4370,11 +4370,11 @@ static void sync_vmcs02_to_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
- if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
+ if (nested_vmx_is_evmptr12_valid(vmx))
sync_vmcs02_to_vmcs12_rare(vcpu, vmcs12);
vmx->nested.need_sync_vmcs02_to_vmcs12_rare =
- !evmptr_is_valid(vmx->nested.hv_evmcs_vmptr);
+ !nested_vmx_is_evmptr12_valid(vmx);
vmcs12->guest_cr0 = vmcs12_guest_cr0(vcpu, vmcs12);
vmcs12->guest_cr4 = vmcs12_guest_cr4(vcpu, vmcs12);
@@ -4897,7 +4897,7 @@ void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
}
if ((vm_exit_reason != -1) &&
- (enable_shadow_vmcs || evmptr_is_valid(vmx->nested.hv_evmcs_vmptr)))
+ (enable_shadow_vmcs || nested_vmx_is_evmptr12_valid(vmx)))
vmx->nested.need_vmcs12_to_shadow_sync = true;
/* in case we halted in L2 */
@@ -5390,7 +5390,7 @@ static int handle_vmread(struct kvm_vcpu *vcpu)
/* Decode instruction info and find the field to read */
field = kvm_register_read(vcpu, (((instr_info) >> 28) & 0xf));
- if (!evmptr_is_valid(vmx->nested.hv_evmcs_vmptr)) {
+ if (!nested_vmx_is_evmptr12_valid(vmx)) {
/*
* In VMX non-root operation, when the VMCS-link pointer is INVALID_GPA,
* any VMREAD sets the ALU flags for VMfailInvalid.
@@ -5616,7 +5616,7 @@ static int handle_vmptrld(struct kvm_vcpu *vcpu)
return nested_vmx_fail(vcpu, VMXERR_VMPTRLD_VMXON_POINTER);
/* Forbid normal VMPTRLD if Enlightened version was used */
- if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
+ if (nested_vmx_is_evmptr12_valid(vmx))
return 1;
if (vmx->nested.current_vmptr != vmptr) {
@@ -5679,7 +5679,7 @@ static int handle_vmptrst(struct kvm_vcpu *vcpu)
if (!nested_vmx_check_permission(vcpu))
return 1;
- if (unlikely(evmptr_is_valid(to_vmx(vcpu)->nested.hv_evmcs_vmptr)))
+ if (unlikely(nested_vmx_is_evmptr12_valid(to_vmx(vcpu))))
return 1;
if (get_vmx_mem_address(vcpu, exit_qual, instr_info,
@@ -6467,7 +6467,7 @@ static int vmx_get_nested_state(struct kvm_vcpu *vcpu,
kvm_state.size += sizeof(user_vmx_nested_state->vmcs12);
/* 'hv_evmcs_vmptr' can also be EVMPTR_MAP_PENDING here */
- if (vmx->nested.hv_evmcs_vmptr != EVMPTR_INVALID)
+ if (nested_vmx_is_evmptr12_set(vmx))
kvm_state.flags |= KVM_STATE_NESTED_EVMCS;
if (is_guest_mode(vcpu) &&
@@ -6523,7 +6523,7 @@ static int vmx_get_nested_state(struct kvm_vcpu *vcpu,
} else {
copy_vmcs02_to_vmcs12_rare(vcpu, get_vmcs12(vcpu));
if (!vmx->nested.need_vmcs12_to_shadow_sync) {
- if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
+ if (nested_vmx_is_evmptr12_valid(vmx))
/*
* L1 hypervisor is not obliged to keep eVMCS
* clean fields data always up-to-date while
diff --git a/arch/x86/kvm/vmx/nested.h b/arch/x86/kvm/vmx/nested.h
index b0f2e26c1aea..cce4e2aa30fb 100644
--- a/arch/x86/kvm/vmx/nested.h
+++ b/arch/x86/kvm/vmx/nested.h
@@ -58,7 +58,7 @@ static inline int vmx_has_valid_vmcs12(struct kvm_vcpu *vcpu)
/* 'hv_evmcs_vmptr' can also be EVMPTR_MAP_PENDING here */
return vmx->nested.current_vmptr != -1ull ||
- vmx->nested.hv_evmcs_vmptr != EVMPTR_INVALID;
+ nested_vmx_is_evmptr12_set(vmx);
}
static inline u16 nested_get_vpid02(struct kvm_vcpu *vcpu)
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 14/16] KVM: nVMX: hyper-v: Introduce nested_vmx_evmcs() accessor
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (12 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 13/16] KVM: nVMX: hyper-v: Introduce nested_vmx_is_evmptr12_{valid,set}() helpers Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 15/16] KVM: nVMX: hyper-v: Hide more stuff under CONFIG_KVM_HYPERV Vitaly Kuznetsov
` (2 subsequent siblings)
16 siblings, 0 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
There's a number of 'vmx->nested.hv_evmcs' accesses in nested.c, introduce
'nested_vmx_evmcs()' accessor to hide them all in !CONFIG_KVM_HYPERV case.
No functional change intended.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/vmx/hyperv.h | 10 ++++++++++
arch/x86/kvm/vmx/nested.c | 33 ++++++++++++++++++---------------
2 files changed, 28 insertions(+), 15 deletions(-)
diff --git a/arch/x86/kvm/vmx/hyperv.h b/arch/x86/kvm/vmx/hyperv.h
index 71e90a16f183..a87407412615 100644
--- a/arch/x86/kvm/vmx/hyperv.h
+++ b/arch/x86/kvm/vmx/hyperv.h
@@ -37,6 +37,11 @@ static inline bool nested_vmx_is_evmptr12_set(struct vcpu_vmx *vmx)
return evmptr_is_set(vmx->nested.hv_evmcs_vmptr);
}
+static inline struct hv_enlightened_vmcs *nested_vmx_evmcs(struct vcpu_vmx *vmx)
+{
+ return vmx->nested.hv_evmcs;
+}
+
static inline bool guest_cpuid_has_evmcs(struct kvm_vcpu *vcpu)
{
/*
@@ -75,6 +80,11 @@ static inline bool nested_vmx_is_evmptr12_set(struct vcpu_vmx *vmx)
{
return false;
}
+
+static inline struct hv_enlightened_vmcs *nested_vmx_evmcs(struct vcpu_vmx *vmx)
+{
+ return NULL;
+}
#endif
#endif /* __KVM_X86_VMX_HYPERV_H */
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 0507174750e0..4e872863a0c9 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -263,7 +263,7 @@ static bool nested_evmcs_handle_vmclear(struct kvm_vcpu *vcpu, gpa_t vmptr)
!evmptr_is_valid(nested_get_evmptr(vcpu)))
return false;
- if (vmx->nested.hv_evmcs && vmptr == vmx->nested.hv_evmcs_vmptr)
+ if (nested_vmx_evmcs(vmx) && vmptr == vmx->nested.hv_evmcs_vmptr)
nested_release_evmcs(vcpu);
return true;
@@ -601,7 +601,6 @@ static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu,
int msr;
unsigned long *msr_bitmap_l1;
unsigned long *msr_bitmap_l0 = vmx->nested.vmcs02.msr_bitmap;
- struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
struct kvm_host_map *map = &vmx->nested.msr_bitmap_map;
/* Nothing to do if the MSR bitmap is not in use. */
@@ -617,10 +616,13 @@ static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu,
* - Nested hypervisor (L1) has enabled 'Enlightened MSR Bitmap' feature
* and tells KVM (L0) there were no changes in MSR bitmap for L2.
*/
- if (!vmx->nested.force_msr_bitmap_recalc && evmcs &&
- evmcs->hv_enlightenments_control.msr_bitmap &&
- evmcs->hv_clean_fields & HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP)
- return true;
+ if (!vmx->nested.force_msr_bitmap_recalc) {
+ struct hv_enlightened_vmcs *evmcs = nested_vmx_evmcs(vmx);
+
+ if (evmcs && evmcs->hv_enlightenments_control.msr_bitmap &&
+ evmcs->hv_clean_fields & HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP)
+ return true;
+ }
if (kvm_vcpu_map(vcpu, gpa_to_gfn(vmcs12->msr_bitmap), map))
return false;
@@ -1603,7 +1605,7 @@ static void copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx, u32 hv_clean_fields
{
#ifdef CONFIG_KVM_HYPERV
struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12;
- struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
+ struct hv_enlightened_vmcs *evmcs = nested_vmx_evmcs(vmx);
struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(&vmx->vcpu);
/* HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE */
@@ -1851,7 +1853,7 @@ static void copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
{
#ifdef CONFIG_KVM_HYPERV
struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12;
- struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
+ struct hv_enlightened_vmcs *evmcs = nested_vmx_evmcs(vmx);
/*
* Should not be changed by KVM:
@@ -2438,7 +2440,7 @@ static void prepare_vmcs02_early(struct vcpu_vmx *vmx, struct loaded_vmcs *vmcs0
static void prepare_vmcs02_rare(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
{
- struct hv_enlightened_vmcs *hv_evmcs = vmx->nested.hv_evmcs;
+ struct hv_enlightened_vmcs *hv_evmcs = nested_vmx_evmcs(vmx);
if (!hv_evmcs || !(hv_evmcs->hv_clean_fields &
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2)) {
@@ -2570,6 +2572,7 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
enum vm_entry_failure_code *entry_failure_code)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
+ struct hv_enlightened_vmcs *evmcs = nested_vmx_evmcs(vmx);
bool load_guest_pdptrs_vmcs12 = false;
if (vmx->nested.dirty_vmcs12 || nested_vmx_is_evmptr12_valid(vmx)) {
@@ -2577,8 +2580,7 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
vmx->nested.dirty_vmcs12 = false;
load_guest_pdptrs_vmcs12 = !nested_vmx_is_evmptr12_valid(vmx) ||
- !(vmx->nested.hv_evmcs->hv_clean_fields &
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1);
+ !(evmcs->hv_clean_fields & HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1);
}
if (vmx->nested.nested_run_pending &&
@@ -2700,8 +2702,7 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
* here.
*/
if (nested_vmx_is_evmptr12_valid(vmx))
- vmx->nested.hv_evmcs->hv_clean_fields |=
- HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL;
+ evmcs->hv_clean_fields |= HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL;
return 0;
}
@@ -3626,7 +3627,9 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch)
return nested_vmx_failInvalid(vcpu);
if (nested_vmx_is_evmptr12_valid(vmx)) {
- copy_enlightened_to_vmcs12(vmx, vmx->nested.hv_evmcs->hv_clean_fields);
+ struct hv_enlightened_vmcs *evmcs = nested_vmx_evmcs(vmx);
+
+ copy_enlightened_to_vmcs12(vmx, evmcs->hv_clean_fields);
/* Enlightened VMCS doesn't have launch state */
vmcs12->launch_state = !launch;
} else if (enable_shadow_vmcs) {
@@ -5428,7 +5431,7 @@ static int handle_vmread(struct kvm_vcpu *vcpu)
return nested_vmx_fail(vcpu, VMXERR_UNSUPPORTED_VMCS_COMPONENT);
/* Read the field, zero-extended to a u64 value */
- value = evmcs_read_any(vmx->nested.hv_evmcs, field, offset);
+ value = evmcs_read_any(nested_vmx_evmcs(vmx), field, offset);
}
/*
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 15/16] KVM: nVMX: hyper-v: Hide more stuff under CONFIG_KVM_HYPERV
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (13 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 14/16] KVM: nVMX: hyper-v: Introduce nested_vmx_evmcs() accessor Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 16/16] KVM: nSVM: hyper-v: Hide more stuff under CONFIG_KVM_HYPERV/CONFIG_HYPERV Vitaly Kuznetsov
2023-12-08 2:17 ` [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Sean Christopherson
16 siblings, 0 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
'hv_evmcs_vmptr'/'hv_evmcs_map'/'hv_evmcs' fields in 'struct nested_vmx'
should not be used when !CONFIG_KVM_HYPERV, hide them when
!CONFIG_KVM_HYPERV.
No functional change intended.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/vmx/nested.c | 2 ++
arch/x86/kvm/vmx/vmx.c | 3 +++
arch/x86/kvm/vmx/vmx.h | 2 ++
3 files changed, 7 insertions(+)
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 4e872863a0c9..cf47b8b7f40f 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -6667,6 +6667,7 @@ static int vmx_set_nested_state(struct kvm_vcpu *vcpu,
return -EINVAL;
set_current_vmptr(vmx, kvm_state->hdr.vmx.vmcs12_pa);
+#ifdef CONFIG_KVM_HYPERV
} else if (kvm_state->flags & KVM_STATE_NESTED_EVMCS) {
/*
* nested_vmx_handle_enlightened_vmptrld() cannot be called
@@ -6676,6 +6677,7 @@ static int vmx_set_nested_state(struct kvm_vcpu *vcpu,
*/
vmx->nested.hv_evmcs_vmptr = EVMPTR_MAP_PENDING;
kvm_make_request(KVM_REQ_GET_NESTED_STATE_PAGES, vcpu);
+#endif
} else {
return -EINVAL;
}
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 3ff5c44dff9d..a26603ddc968 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4828,7 +4828,10 @@ static void __vmx_vcpu_reset(struct kvm_vcpu *vcpu)
vmx->nested.posted_intr_nv = -1;
vmx->nested.vmxon_ptr = INVALID_GPA;
vmx->nested.current_vmptr = INVALID_GPA;
+
+#ifdef CONFIG_KVM_HYPERV
vmx->nested.hv_evmcs_vmptr = EVMPTR_INVALID;
+#endif
vcpu->arch.microcode_version = 0x100000000ULL;
vmx->msr_ia32_feature_control_valid_bits = FEAT_CTL_LOCKED;
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 959c6d94287f..8fe6eb2b4a34 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -241,9 +241,11 @@ struct nested_vmx {
bool guest_mode;
} smm;
+#ifdef CONFIG_KVM_HYPERV
gpa_t hv_evmcs_vmptr;
struct kvm_host_map hv_evmcs_map;
struct hv_enlightened_vmcs *hv_evmcs;
+#endif
};
struct vcpu_vmx {
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* [PATCH v2 16/16] KVM: nSVM: hyper-v: Hide more stuff under CONFIG_KVM_HYPERV/CONFIG_HYPERV
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (14 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 15/16] KVM: nVMX: hyper-v: Hide more stuff under CONFIG_KVM_HYPERV Vitaly Kuznetsov
@ 2023-12-05 10:36 ` Vitaly Kuznetsov
2023-12-08 2:17 ` [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Sean Christopherson
16 siblings, 0 replies; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-05 10:36 UTC (permalink / raw)
To: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
'struct hv_vmcb_enlightenments' in VMCB only make sense when either
CONFIG_KVM_HYPERV or CONFIG_HYPERV is enabled.
No functional change intended.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/svm/nested.c | 20 ++++++++++++++------
arch/x86/kvm/svm/svm.h | 2 ++
2 files changed, 16 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 74c04102ef01..20212aac050b 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -187,7 +187,6 @@ void recalc_intercepts(struct vcpu_svm *svm)
*/
static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
{
- struct hv_vmcb_enlightenments *hve = &svm->nested.ctl.hv_enlightenments;
int i;
/*
@@ -198,11 +197,16 @@ static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
* - Nested hypervisor (L1) is using Hyper-V emulation interface and
* tells KVM (L0) there were no changes in MSR bitmap for L2.
*/
- if (!svm->nested.force_msr_bitmap_recalc &&
- kvm_hv_hypercall_enabled(&svm->vcpu) &&
- hve->hv_enlightenments_control.msr_bitmap &&
- (svm->nested.ctl.clean & BIT(HV_VMCB_NESTED_ENLIGHTENMENTS)))
- goto set_msrpm_base_pa;
+#ifdef CONFIG_KVM_HYPERV
+ if (!svm->nested.force_msr_bitmap_recalc) {
+ struct hv_vmcb_enlightenments *hve = &svm->nested.ctl.hv_enlightenments;
+
+ if (kvm_hv_hypercall_enabled(&svm->vcpu) &&
+ hve->hv_enlightenments_control.msr_bitmap &&
+ (svm->nested.ctl.clean & BIT(HV_VMCB_NESTED_ENLIGHTENMENTS)))
+ goto set_msrpm_base_pa;
+ }
+#endif
if (!(vmcb12_is_intercept(&svm->nested.ctl, INTERCEPT_MSR_PROT)))
return true;
@@ -230,7 +234,9 @@ static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
svm->nested.force_msr_bitmap_recalc = false;
+#ifdef CONFIG_KVM_HYPERV
set_msrpm_base_pa:
+#endif
svm->vmcb->control.msrpm_base_pa = __sme_set(__pa(svm->nested.msrpm));
return true;
@@ -378,12 +384,14 @@ void __nested_copy_vmcb_control_to_cache(struct kvm_vcpu *vcpu,
to->msrpm_base_pa &= ~0x0fffULL;
to->iopm_base_pa &= ~0x0fffULL;
+#ifdef CONFIG_KVM_HYPERV
/* Hyper-V extensions (Enlightened VMCB) */
if (kvm_hv_hypercall_enabled(vcpu)) {
to->clean = from->clean;
memcpy(&to->hv_enlightenments, &from->hv_enlightenments,
sizeof(to->hv_enlightenments));
}
+#endif
}
void nested_copy_vmcb_control_to_cache(struct vcpu_svm *svm,
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index be67ab7fdd10..59adff7bbf55 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -148,7 +148,9 @@ struct vmcb_ctrl_area_cached {
u64 virt_ext;
u32 clean;
union {
+#if IS_ENABLED(CONFIG_HYPERV) || IS_ENABLED(CONFIG_KVM_HYPERV)
struct hv_vmcb_enlightenments hv_enlightenments;
+#endif
u8 reserved_sw[32];
};
};
--
2.43.0
^ permalink raw reply related [flat|nested] 25+ messages in thread
* Re: [PATCH v2 11/16] KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h
2023-12-05 10:36 ` [PATCH v2 11/16] KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h Vitaly Kuznetsov
@ 2023-12-05 12:05 ` Maxim Levitsky
0 siblings, 0 replies; 25+ messages in thread
From: Maxim Levitsky @ 2023-12-05 12:05 UTC (permalink / raw)
To: Vitaly Kuznetsov, kvm, Paolo Bonzini, Sean Christopherson
On Tue, 2023-12-05 at 11:36 +0100, Vitaly Kuznetsov wrote:
> In preparation for making Hyper-V emulation optional, move Hyper-V specific
> guest_cpuid_has_evmcs() to hyperv.h.
>
> No functional change intended.
>
> Suggested-by: Sean Christopherson <seanjc@google.com>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> ---
> arch/x86/kvm/vmx/hyperv.h | 11 +++++++++++
> arch/x86/kvm/vmx/vmx.h | 10 ----------
> 2 files changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/arch/x86/kvm/vmx/hyperv.h b/arch/x86/kvm/vmx/hyperv.h
> index d4ed99008518..6e1ee951e360 100644
> --- a/arch/x86/kvm/vmx/hyperv.h
> +++ b/arch/x86/kvm/vmx/hyperv.h
> @@ -4,6 +4,7 @@
>
> #include <linux/kvm_host.h>
> #include "vmcs12.h"
> +#include "vmx.h"
>
> #define EVMPTR_INVALID (-1ULL)
> #define EVMPTR_MAP_PENDING (-2ULL)
> @@ -20,6 +21,16 @@ enum nested_evmptrld_status {
> EVMPTRLD_ERROR,
> };
>
> +static inline bool guest_cpuid_has_evmcs(struct kvm_vcpu *vcpu)
> +{
> + /*
> + * eVMCS is exposed to the guest if Hyper-V is enabled in CPUID and
> + * eVMCS has been explicitly enabled by userspace.
> + */
> + return vcpu->arch.hyperv_enabled &&
> + to_vmx(vcpu)->nested.enlightened_vmcs_enabled;
> +}
> +
> u64 nested_get_evmptr(struct kvm_vcpu *vcpu);
> uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu);
> int nested_enable_evmcs(struct kvm_vcpu *vcpu,
> diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
> index c2130d2c8e24..959c6d94287f 100644
> --- a/arch/x86/kvm/vmx/vmx.h
> +++ b/arch/x86/kvm/vmx/vmx.h
> @@ -745,14 +745,4 @@ static inline bool vmx_can_use_ipiv(struct kvm_vcpu *vcpu)
> return lapic_in_kernel(vcpu) && enable_ipiv;
> }
>
> -static inline bool guest_cpuid_has_evmcs(struct kvm_vcpu *vcpu)
> -{
> - /*
> - * eVMCS is exposed to the guest if Hyper-V is enabled in CPUID and
> - * eVMCS has been explicitly enabled by userspace.
> - */
> - return vcpu->arch.hyperv_enabled &&
> - to_vmx(vcpu)->nested.enlightened_vmcs_enabled;
> -}
> -
> #endif /* __KVM_X86_VMX_H */
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Best regards,
Maxim Levitsky
^ permalink raw reply [flat|nested] 25+ messages in thread
* Re: [PATCH v2 08/16] KVM: x86: hyper-v: Split off nested_evmcs_handle_vmclear()
2023-12-05 10:36 ` [PATCH v2 08/16] KVM: x86: hyper-v: Split off nested_evmcs_handle_vmclear() Vitaly Kuznetsov
@ 2023-12-05 12:06 ` Maxim Levitsky
0 siblings, 0 replies; 25+ messages in thread
From: Maxim Levitsky @ 2023-12-05 12:06 UTC (permalink / raw)
To: Vitaly Kuznetsov, kvm, Paolo Bonzini, Sean Christopherson
On Tue, 2023-12-05 at 11:36 +0100, Vitaly Kuznetsov wrote:
> To avoid overloading handle_vmclear() with Hyper-V specific details and to
> prepare the code to making Hyper-V emulation optional, create a dedicated
> nested_evmcs_handle_vmclear() helper.
>
> No functional change intended.
>
> Suggested-by: Sean Christopherson <seanjc@google.com>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> ---
> arch/x86/kvm/vmx/nested.c | 38 ++++++++++++++++++++++++--------------
> 1 file changed, 24 insertions(+), 14 deletions(-)
>
> diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
> index 382c0746d069..903b6f9ea2bd 100644
> --- a/arch/x86/kvm/vmx/nested.c
> +++ b/arch/x86/kvm/vmx/nested.c
> @@ -243,6 +243,29 @@ static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
> }
> }
>
> +static bool nested_evmcs_handle_vmclear(struct kvm_vcpu *vcpu, gpa_t vmptr)
> +{
> + struct vcpu_vmx *vmx = to_vmx(vcpu);
> + /*
> + * When Enlightened VMEntry is enabled on the calling CPU we treat
> + * memory area pointer by vmptr as Enlightened VMCS (as there's no good
> + * way to distinguish it from VMCS12) and we must not corrupt it by
> + * writing to the non-existent 'launch_state' field. The area doesn't
> + * have to be the currently active EVMCS on the calling CPU and there's
> + * nothing KVM has to do to transition it from 'active' to 'non-active'
> + * state. It is possible that the area will stay mapped as
> + * vmx->nested.hv_evmcs but this shouldn't be a problem.
> + */
> + if (!guest_cpuid_has_evmcs(vcpu) ||
> + !evmptr_is_valid(nested_get_evmptr(vcpu)))
> + return false;
> +
> + if (vmx->nested.hv_evmcs && vmptr == vmx->nested.hv_evmcs_vmptr)
> + nested_release_evmcs(vcpu);
> +
> + return true;
> +}
> +
> static void vmx_sync_vmcs_host_state(struct vcpu_vmx *vmx,
> struct loaded_vmcs *prev)
> {
> @@ -5286,18 +5309,7 @@ static int handle_vmclear(struct kvm_vcpu *vcpu)
> if (vmptr == vmx->nested.vmxon_ptr)
> return nested_vmx_fail(vcpu, VMXERR_VMCLEAR_VMXON_POINTER);
>
> - /*
> - * When Enlightened VMEntry is enabled on the calling CPU we treat
> - * memory area pointer by vmptr as Enlightened VMCS (as there's no good
> - * way to distinguish it from VMCS12) and we must not corrupt it by
> - * writing to the non-existent 'launch_state' field. The area doesn't
> - * have to be the currently active EVMCS on the calling CPU and there's
> - * nothing KVM has to do to transition it from 'active' to 'non-active'
> - * state. It is possible that the area will stay mapped as
> - * vmx->nested.hv_evmcs but this shouldn't be a problem.
> - */
> - if (likely(!guest_cpuid_has_evmcs(vcpu) ||
> - !evmptr_is_valid(nested_get_evmptr(vcpu)))) {
> + if (likely(!nested_evmcs_handle_vmclear(vcpu, vmptr))) {
> if (vmptr == vmx->nested.current_vmptr)
> nested_release_vmcs12(vcpu);
>
> @@ -5314,8 +5326,6 @@ static int handle_vmclear(struct kvm_vcpu *vcpu)
> vmptr + offsetof(struct vmcs12,
> launch_state),
> &zero, sizeof(zero));
> - } else if (vmx->nested.hv_evmcs && vmptr == vmx->nested.hv_evmcs_vmptr) {
> - nested_release_evmcs(vcpu);
> }
>
> return nested_vmx_succeed(vcpu);
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Best regards,
Maxim Levitsky
^ permalink raw reply [flat|nested] 25+ messages in thread
* Re: [PATCH v2 12/16] KVM: x86: Make Hyper-V emulation optional
2023-12-05 10:36 ` [PATCH v2 12/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
@ 2023-12-05 14:52 ` Maxim Levitsky
2023-12-06 11:36 ` Jeremi Piotrowski
[not found] ` <46235.123120606372000354@us-mta-490.us.mimecast.lan>
2 siblings, 0 replies; 25+ messages in thread
From: Maxim Levitsky @ 2023-12-05 14:52 UTC (permalink / raw)
To: Vitaly Kuznetsov, kvm, Paolo Bonzini, Sean Christopherson
On Tue, 2023-12-05 at 11:36 +0100, Vitaly Kuznetsov wrote:
> Hyper-V emulation in KVM is a fairly big chunk and in some cases it may be
> desirable to not compile it in to reduce module sizes as well as the attack
> surface. Introduce CONFIG_KVM_HYPERV option to make it possible.
>
> Note, there's room for further nVMX/nSVM code optimizations when
> !CONFIG_KVM_HYPERV, this will be done in follow-up patches.
>
> Reorganize Makefile a bit so all CONFIG_HYPERV and CONFIG_KVM_HYPERV files
> are grouped together.
>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> ---
> arch/x86/include/asm/kvm_host.h | 6 ++++
> arch/x86/kvm/Kconfig | 14 ++++++++
> arch/x86/kvm/Makefile | 20 +++++------
> arch/x86/kvm/cpuid.c | 6 ++++
> arch/x86/kvm/hyperv.h | 61 +++++++++++++++++++++++++++++++-
> arch/x86/kvm/irq_comm.c | 9 ++++-
> arch/x86/kvm/svm/hyperv.h | 9 +++++
> arch/x86/kvm/vmx/hyperv.h | 17 ++++++---
> arch/x86/kvm/vmx/nested.c | 30 ++++++++++++++++
> arch/x86/kvm/vmx/vmx.c | 2 ++
> arch/x86/kvm/x86.c | 62 ++++++++++++++++++++++++---------
> 11 files changed, 201 insertions(+), 35 deletions(-)
>
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 9dab2f7de495..3b8c63767554 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -937,8 +937,10 @@ struct kvm_vcpu_arch {
> /* used for guest single stepping over the given code position */
> unsigned long singlestep_rip;
>
> +#ifdef CONFIG_KVM_HYPERV
> bool hyperv_enabled;
> struct kvm_vcpu_hv *hyperv;
> +#endif
> #ifdef CONFIG_KVM_XEN
> struct kvm_vcpu_xen xen;
> #endif
> @@ -1095,6 +1097,7 @@ enum hv_tsc_page_status {
> HV_TSC_PAGE_BROKEN,
> };
>
> +#ifdef CONFIG_KVM_HYPERV
> /* Hyper-V emulation context */
> struct kvm_hv {
> struct mutex hv_lock;
> @@ -1127,6 +1130,7 @@ struct kvm_hv {
>
> struct kvm_hv_syndbg hv_syndbg;
> };
> +#endif
>
> struct msr_bitmap_range {
> u32 flags;
> @@ -1349,7 +1353,9 @@ struct kvm_arch {
> /* reads protected by irq_srcu, writes by irq_lock */
> struct hlist_head mask_notifier_list;
>
> +#ifdef CONFIG_KVM_HYPERV
> struct kvm_hv hyperv;
> +#endif
>
> #ifdef CONFIG_KVM_XEN
> struct kvm_xen xen;
> diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
> index c1716e83d176..34f2f47cadf2 100644
> --- a/arch/x86/kvm/Kconfig
> +++ b/arch/x86/kvm/Kconfig
> @@ -141,6 +141,20 @@ config KVM_SMM
>
> If unsure, say Y.
>
> +config KVM_HYPERV
> + bool "Support for Microsoft Hyper-V emulation"
> + depends on KVM
> + default y
> + help
> + Provides KVM support for emulating Microsoft Hyper-V. This allows KVM
> + to expose a subset of the paravirtualized interfaces defined in the
> + Hyper-V Hypervisor Top-Level Functional Specification (TLFS):
> + https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs
> + These interfaces are required for the correct and performant functioning
> + of Windows and Hyper-V guests on KVM.
> +
> + If unsure, say "Y".
> +
> config KVM_XEN
> bool "Support for Xen hypercall interface"
> depends on KVM
> diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
> index 8ea872401cd6..475b5fa917a6 100644
> --- a/arch/x86/kvm/Makefile
> +++ b/arch/x86/kvm/Makefile
> @@ -11,29 +11,27 @@ include $(srctree)/virt/kvm/Makefile.kvm
>
> kvm-y += x86.o emulate.o i8259.o irq.o lapic.o \
> i8254.o ioapic.o irq_comm.o cpuid.o pmu.o mtrr.o \
> - hyperv.o debugfs.o mmu/mmu.o mmu/page_track.o \
> + debugfs.o mmu/mmu.o mmu/page_track.o \
> mmu/spte.o
>
> -ifdef CONFIG_HYPERV
> -kvm-y += kvm_onhyperv.o
> -endif
> -
> kvm-$(CONFIG_X86_64) += mmu/tdp_iter.o mmu/tdp_mmu.o
> +kvm-$(CONFIG_KVM_HYPERV) += hyperv.o
> kvm-$(CONFIG_KVM_XEN) += xen.o
> kvm-$(CONFIG_KVM_SMM) += smm.o
>
> kvm-intel-y += vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o vmx/vmcs12.o \
> - vmx/hyperv.o vmx/hyperv_evmcs.o vmx/nested.o vmx/posted_intr.o
> -kvm-intel-$(CONFIG_X86_SGX_KVM) += vmx/sgx.o
> + vmx/nested.o vmx/posted_intr.o
>
> -ifdef CONFIG_HYPERV
> -kvm-intel-y += vmx/vmx_onhyperv.o
> -endif
> +kvm-intel-$(CONFIG_X86_SGX_KVM) += vmx/sgx.o
> +kvm-intel-$(CONFIG_KVM_HYPERV) += vmx/hyperv.o vmx/hyperv_evmcs.o
>
> kvm-amd-y += svm/svm.o svm/vmenter.o svm/pmu.o svm/nested.o svm/avic.o \
> - svm/sev.o svm/hyperv.o
> + svm/sev.o
> +kvm-amd-$(CONFIG_KVM_HYPERV) += svm/hyperv.o
>
> ifdef CONFIG_HYPERV
> +kvm-y += kvm_onhyperv.o
> +kvm-intel-y += vmx/vmx_onhyperv.o vmx/hyperv_evmcs.o
> kvm-amd-y += svm/svm_onhyperv.o
> endif
>
> diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
> index dda6fc4cfae8..1b278a3f0689 100644
> --- a/arch/x86/kvm/cpuid.c
> +++ b/arch/x86/kvm/cpuid.c
> @@ -314,11 +314,15 @@ EXPORT_SYMBOL_GPL(kvm_update_cpuid_runtime);
>
> static bool kvm_cpuid_has_hyperv(struct kvm_cpuid_entry2 *entries, int nent)
> {
> +#ifdef CONFIG_KVM_HYPERV
> struct kvm_cpuid_entry2 *entry;
>
> entry = cpuid_entry2_find(entries, nent, HYPERV_CPUID_INTERFACE,
> KVM_CPUID_INDEX_NOT_SIGNIFICANT);
> return entry && entry->eax == HYPERV_CPUID_SIGNATURE_EAX;
> +#else
> + return false;
> +#endif
> }
>
> static void kvm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
> @@ -433,11 +437,13 @@ static int kvm_set_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid_entry2 *e2,
> return 0;
> }
>
> +#ifdef CONFIG_KVM_HYPERV
> if (kvm_cpuid_has_hyperv(e2, nent)) {
> r = kvm_hv_vcpu_init(vcpu);
> if (r)
> return r;
> }
> +#endif
>
> r = kvm_check_cpuid(vcpu, e2, nent);
> if (r)
> diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h
> index 75dcbe598fbc..53eb3bf56bdf 100644
> --- a/arch/x86/kvm/hyperv.h
> +++ b/arch/x86/kvm/hyperv.h
> @@ -24,6 +24,8 @@
> #include <linux/kvm_host.h>
> #include "x86.h"
>
> +#ifdef CONFIG_KVM_HYPERV
> +
> /* "Hv#1" signature */
> #define HYPERV_CPUID_SIGNATURE_EAX 0x31237648
>
> @@ -259,5 +261,62 @@ static inline void kvm_hv_nested_transtion_tlb_flush(struct kvm_vcpu *vcpu, bool
> }
>
> int kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu);
> +#else /* CONFIG_KVM_HYPERV */
> +static inline void kvm_hv_setup_tsc_page(struct kvm *kvm,
> + struct pvclock_vcpu_time_info *hv_clock) {}
> +static inline void kvm_hv_request_tsc_page_update(struct kvm *kvm) {}
> +static inline void kvm_hv_init_vm(struct kvm *kvm) {}
> +static inline void kvm_hv_destroy_vm(struct kvm *kvm) {}
> +static inline int kvm_hv_vcpu_init(struct kvm_vcpu *vcpu)
> +{
> + return 0;
> +}
> +static inline void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu) {}
> +static inline bool kvm_hv_hypercall_enabled(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +static inline int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
> +{
> + return HV_STATUS_ACCESS_DENIED;
> +}
> +static inline void kvm_hv_vcpu_purge_flush_tlb(struct kvm_vcpu *vcpu) {}
> +static inline void kvm_hv_free_pa_page(struct kvm *kvm) {}
> +static inline bool kvm_hv_synic_has_vector(struct kvm_vcpu *vcpu, int vector)
> +{
> + return false;
> +}
> +static inline bool kvm_hv_synic_auto_eoi_set(struct kvm_vcpu *vcpu, int vector)
> +{
> + return false;
> +}
> +static inline void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector) {}
> +static inline bool kvm_hv_invtsc_suppressed(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +static inline void kvm_hv_set_cpuid(struct kvm_vcpu *vcpu, bool hyperv_enabled) {}
> +static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +static inline bool kvm_hv_is_tlb_flush_hcall(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +static inline bool guest_hv_cpuid_has_l2_tlb_flush(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +static inline int kvm_hv_verify_vp_assist(struct kvm_vcpu *vcpu)
> +{
> + return 0;
> +}
> +static inline u32 kvm_hv_get_vpindex(struct kvm_vcpu *vcpu)
> +{
> + return vcpu->vcpu_idx;
> +}
> +static inline void kvm_hv_nested_transtion_tlb_flush(struct kvm_vcpu *vcpu, bool tdp_enabled) {}
> +#endif /* CONFIG_KVM_HYPERV */
>
> -#endif
> +#endif /* __ARCH_X86_KVM_HYPERV_H__ */
> diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
> index 16d076a1b91a..68f3f6c26046 100644
> --- a/arch/x86/kvm/irq_comm.c
> +++ b/arch/x86/kvm/irq_comm.c
> @@ -144,7 +144,7 @@ int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
> return kvm_irq_delivery_to_apic(kvm, NULL, &irq, NULL);
> }
>
> -
> +#ifdef CONFIG_KVM_HYPERV
> static int kvm_hv_set_sint(struct kvm_kernel_irq_routing_entry *e,
> struct kvm *kvm, int irq_source_id, int level,
> bool line_status)
> @@ -154,6 +154,7 @@ static int kvm_hv_set_sint(struct kvm_kernel_irq_routing_entry *e,
>
> return kvm_hv_synic_set_irq(kvm, e->hv_sint.vcpu, e->hv_sint.sint);
> }
> +#endif
>
> int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
> struct kvm *kvm, int irq_source_id, int level,
> @@ -163,9 +164,11 @@ int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
> int r;
>
> switch (e->type) {
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_IRQ_ROUTING_HV_SINT:
> return kvm_hv_set_sint(e, kvm, irq_source_id, level,
> line_status);
> +#endif
>
> case KVM_IRQ_ROUTING_MSI:
> if (kvm_msi_route_invalid(kvm, e))
> @@ -314,11 +317,13 @@ int kvm_set_routing_entry(struct kvm *kvm,
> if (kvm_msi_route_invalid(kvm, e))
> return -EINVAL;
> break;
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_IRQ_ROUTING_HV_SINT:
> e->set = kvm_hv_set_sint;
> e->hv_sint.vcpu = ue->u.hv_sint.vcpu;
> e->hv_sint.sint = ue->u.hv_sint.sint;
> break;
> +#endif
> #ifdef CONFIG_KVM_XEN
> case KVM_IRQ_ROUTING_XEN_EVTCHN:
> return kvm_xen_setup_evtchn(kvm, e, ue);
> @@ -438,5 +443,7 @@ void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
>
> void kvm_arch_irq_routing_update(struct kvm *kvm)
> {
> +#ifdef CONFIG_KVM_HYPERV
> kvm_hv_irq_routing_update(kvm);
> +#endif
> }
> diff --git a/arch/x86/kvm/svm/hyperv.h b/arch/x86/kvm/svm/hyperv.h
> index 02f4784b5d44..d3f8bfc05832 100644
> --- a/arch/x86/kvm/svm/hyperv.h
> +++ b/arch/x86/kvm/svm/hyperv.h
> @@ -11,6 +11,7 @@
> #include "../hyperv.h"
> #include "svm.h"
>
> +#ifdef CONFIG_KVM_HYPERV
> static inline void nested_svm_hv_update_vm_vp_ids(struct kvm_vcpu *vcpu)
> {
> struct vcpu_svm *svm = to_svm(vcpu);
> @@ -41,5 +42,13 @@ static inline bool nested_svm_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu)
> }
>
> void svm_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu);
> +#else /* CONFIG_KVM_HYPERV */
> +static inline void nested_svm_hv_update_vm_vp_ids(struct kvm_vcpu *vcpu) {}
> +static inline bool nested_svm_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +static inline void svm_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu) {}
> +#endif /* CONFIG_KVM_HYPERV */
>
> #endif /* __ARCH_X86_KVM_SVM_HYPERV_H__ */
> diff --git a/arch/x86/kvm/vmx/hyperv.h b/arch/x86/kvm/vmx/hyperv.h
> index 6e1ee951e360..0e90ef4efe34 100644
> --- a/arch/x86/kvm/vmx/hyperv.h
> +++ b/arch/x86/kvm/vmx/hyperv.h
> @@ -9,11 +9,6 @@
> #define EVMPTR_INVALID (-1ULL)
> #define EVMPTR_MAP_PENDING (-2ULL)
>
> -static inline bool evmptr_is_valid(u64 evmptr)
> -{
> - return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
> -}
> -
> enum nested_evmptrld_status {
> EVMPTRLD_DISABLED,
> EVMPTRLD_SUCCEEDED,
> @@ -21,6 +16,12 @@ enum nested_evmptrld_status {
> EVMPTRLD_ERROR,
> };
>
> +#ifdef CONFIG_KVM_HYPERV
> +static inline bool evmptr_is_valid(u64 evmptr)
> +{
> + return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
> +}
> +
> static inline bool guest_cpuid_has_evmcs(struct kvm_vcpu *vcpu)
> {
> /*
> @@ -39,5 +40,11 @@ void nested_evmcs_filter_control_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *
> int nested_evmcs_check_controls(struct vmcs12 *vmcs12);
> bool nested_evmcs_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu);
> void vmx_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu);
> +#else
> +static inline bool evmptr_is_valid(u64 evmptr)
> +{
> + return false;
> +}
> +#endif
>
> #endif /* __KVM_X86_VMX_HYPERV_H */
> diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
> index 903b6f9ea2bd..01a94d290c12 100644
> --- a/arch/x86/kvm/vmx/nested.c
> +++ b/arch/x86/kvm/vmx/nested.c
> @@ -226,6 +226,7 @@ static void vmx_disable_shadow_vmcs(struct vcpu_vmx *vmx)
>
> static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
> {
> +#ifdef CONFIG_KVM_HYPERV
> struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
> struct vcpu_vmx *vmx = to_vmx(vcpu);
>
> @@ -241,10 +242,12 @@ static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
> hv_vcpu->nested.vm_id = 0;
> hv_vcpu->nested.vp_id = 0;
> }
> +#endif
> }
>
> static bool nested_evmcs_handle_vmclear(struct kvm_vcpu *vcpu, gpa_t vmptr)
> {
> +#ifdef CONFIG_KVM_HYPERV
> struct vcpu_vmx *vmx = to_vmx(vcpu);
> /*
> * When Enlightened VMEntry is enabled on the calling CPU we treat
> @@ -264,6 +267,9 @@ static bool nested_evmcs_handle_vmclear(struct kvm_vcpu *vcpu, gpa_t vmptr)
> nested_release_evmcs(vcpu);
>
> return true;
> +#else
> + return false;
> +#endif
> }
>
> static void vmx_sync_vmcs_host_state(struct vcpu_vmx *vmx,
> @@ -1595,6 +1601,7 @@ static void copy_vmcs12_to_shadow(struct vcpu_vmx *vmx)
>
> static void copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx, u32 hv_clean_fields)
> {
> +#ifdef CONFIG_KVM_HYPERV
> struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12;
> struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
> struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(&vmx->vcpu);
> @@ -1835,10 +1842,14 @@ static void copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx, u32 hv_clean_fields
> */
>
> return;
> +#else /* CONFIG_KVM_HYPERV */
> + KVM_BUG_ON(1, vmx->vcpu.kvm);
> +#endif /* CONFIG_KVM_HYPERV */
> }
>
> static void copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
> {
> +#ifdef CONFIG_KVM_HYPERV
> struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12;
> struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
>
> @@ -2009,6 +2020,9 @@ static void copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
> evmcs->guest_bndcfgs = vmcs12->guest_bndcfgs;
>
> return;
> +#else /* CONFIG_KVM_HYPERV */
> + KVM_BUG_ON(1, vmx->vcpu.kvm);
> +#endif /* CONFIG_KVM_HYPERV */
> }
>
> /*
> @@ -2018,6 +2032,7 @@ static void copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
> static enum nested_evmptrld_status nested_vmx_handle_enlightened_vmptrld(
> struct kvm_vcpu *vcpu, bool from_launch)
> {
> +#ifdef CONFIG_KVM_HYPERV
> struct vcpu_vmx *vmx = to_vmx(vcpu);
> bool evmcs_gpa_changed = false;
> u64 evmcs_gpa;
> @@ -2099,6 +2114,9 @@ static enum nested_evmptrld_status nested_vmx_handle_enlightened_vmptrld(
> }
>
> return EVMPTRLD_SUCCEEDED;
> +#else
> + return EVMPTRLD_DISABLED;
> +#endif
> }
>
> void nested_sync_vmcs12_to_shadow(struct kvm_vcpu *vcpu)
> @@ -2905,8 +2923,10 @@ static int nested_vmx_check_controls(struct kvm_vcpu *vcpu,
> nested_check_vm_entry_controls(vcpu, vmcs12))
> return -EINVAL;
>
> +#ifdef CONFIG_KVM_HYPERV
> if (guest_cpuid_has_evmcs(vcpu))
> return nested_evmcs_check_controls(vmcs12);
> +#endif
>
> return 0;
> }
> @@ -3178,6 +3198,7 @@ static int nested_vmx_check_vmentry_hw(struct kvm_vcpu *vcpu)
> return 0;
> }
>
> +#ifdef CONFIG_KVM_HYPERV
> static bool nested_get_evmcs_page(struct kvm_vcpu *vcpu)
> {
> struct vcpu_vmx *vmx = to_vmx(vcpu);
> @@ -3205,6 +3226,7 @@ static bool nested_get_evmcs_page(struct kvm_vcpu *vcpu)
>
> return true;
> }
> +#endif
>
> static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu)
> {
> @@ -3296,6 +3318,7 @@ static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu)
>
> static bool vmx_get_nested_state_pages(struct kvm_vcpu *vcpu)
> {
> +#ifdef CONFIG_KVM_HYPERV
> /*
> * Note: nested_get_evmcs_page() also updates 'vp_assist_page' copy
> * in 'struct kvm_vcpu_hv' in case eVMCS is in use, this is mandatory
> @@ -3312,6 +3335,7 @@ static bool vmx_get_nested_state_pages(struct kvm_vcpu *vcpu)
>
> return false;
> }
> +#endif
>
> if (is_guest_mode(vcpu) && !nested_get_vmcs12_pages(vcpu))
> return false;
> @@ -4749,6 +4773,7 @@ void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
> /* trying to cancel vmlaunch/vmresume is a bug */
> WARN_ON_ONCE(vmx->nested.nested_run_pending);
>
> +#ifdef CONFIG_KVM_HYPERV
> if (kvm_check_request(KVM_REQ_GET_NESTED_STATE_PAGES, vcpu)) {
> /*
> * KVM_REQ_GET_NESTED_STATE_PAGES is also used to map
> @@ -4758,6 +4783,7 @@ void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
> */
> (void)nested_get_evmcs_page(vcpu);
> }
> +#endif
>
> /* Service pending TLB flush requests for L2 before switching to L1. */
> kvm_service_local_tlb_flush_requests(vcpu);
> @@ -6212,11 +6238,13 @@ static bool nested_vmx_l0_wants_exit(struct kvm_vcpu *vcpu,
> * Handle L2's bus locks in L0 directly.
> */
> return true;
> +#ifdef CONFIG_KVM_HYPERV
> case EXIT_REASON_VMCALL:
> /* Hyper-V L2 TLB flush hypercall is handled by L0 */
> return guest_hv_cpuid_has_l2_tlb_flush(vcpu) &&
> nested_evmcs_l2_tlb_flush_enabled(vcpu) &&
> kvm_hv_is_tlb_flush_hcall(vcpu);
> +#endif
> default:
> break;
> }
> @@ -7100,7 +7128,9 @@ struct kvm_x86_nested_ops vmx_nested_ops = {
> .set_state = vmx_set_nested_state,
> .get_nested_state_pages = vmx_get_nested_state_pages,
> .write_log_dirty = nested_vmx_write_pml_buffer,
> +#ifdef CONFIG_KVM_HYPERV
> .enable_evmcs = nested_enable_evmcs,
> .get_evmcs_version = nested_get_evmcs_version,
> .hv_inject_synthetic_vmexit_post_tlb_flush = vmx_hv_inject_synthetic_vmexit_post_tlb_flush,
> +#endif
> };
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index 552593a2ac14..3ff5c44dff9d 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -2048,6 +2048,7 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> if (vmx_get_vmx_msr(&vmx->nested.msrs, msr_info->index,
> &msr_info->data))
> return 1;
> +#ifdef CONFIG_KVM_HYPERV
> /*
> * Enlightened VMCS v1 doesn't have certain VMCS fields but
> * instead of just ignoring the features, different Hyper-V
> @@ -2058,6 +2059,7 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> if (!msr_info->host_initiated && guest_cpuid_has_evmcs(vcpu))
> nested_evmcs_filter_control_msr(vcpu, msr_info->index,
> &msr_info->data);
> +#endif
> break;
> case MSR_IA32_RTIT_CTL:
> if (!vmx_pt_mode_is_host_guest())
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 81224b9676d9..598b057611e0 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -1504,6 +1504,8 @@ static unsigned num_msrs_to_save;
> static const u32 emulated_msrs_all[] = {
> MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
> MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW,
> +
> +#ifdef CONFIG_KVM_HYPERV
> HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL,
> HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC,
> HV_X64_MSR_TSC_FREQUENCY, HV_X64_MSR_APIC_FREQUENCY,
> @@ -1521,6 +1523,7 @@ static const u32 emulated_msrs_all[] = {
> HV_X64_MSR_SYNDBG_CONTROL, HV_X64_MSR_SYNDBG_STATUS,
> HV_X64_MSR_SYNDBG_SEND_BUFFER, HV_X64_MSR_SYNDBG_RECV_BUFFER,
> HV_X64_MSR_SYNDBG_PENDING_BUFFER,
> +#endif
>
> MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME,
> MSR_KVM_PV_EOI_EN, MSR_KVM_ASYNC_PF_INT, MSR_KVM_ASYNC_PF_ACK,
> @@ -4020,6 +4023,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> * the need to ignore the workaround.
> */
> break;
> +#ifdef CONFIG_KVM_HYPERV
> case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
> case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
> case HV_X64_MSR_SYNDBG_OPTIONS:
> @@ -4032,6 +4036,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> case HV_X64_MSR_TSC_INVARIANT_CONTROL:
> return kvm_hv_set_msr_common(vcpu, msr, data,
> msr_info->host_initiated);
> +#endif
> case MSR_IA32_BBL_CR_CTL3:
> /* Drop writes to this legacy MSR -- see rdmsr
> * counterpart for further detail.
> @@ -4377,6 +4382,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> */
> msr_info->data = 0x20000000;
> break;
> +#ifdef CONFIG_KVM_HYPERV
> case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
> case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
> case HV_X64_MSR_SYNDBG_OPTIONS:
> @@ -4390,6 +4396,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> return kvm_hv_get_msr_common(vcpu,
> msr_info->index, &msr_info->data,
> msr_info->host_initiated);
> +#endif
> case MSR_IA32_BBL_CR_CTL3:
> /* This legacy MSR exists but isn't fully documented in current
> * silicon. It is however accessed by winxp in very narrow
> @@ -4527,6 +4534,7 @@ static inline bool kvm_can_mwait_in_guest(void)
> boot_cpu_has(X86_FEATURE_ARAT);
> }
>
> +#ifdef CONFIG_KVM_HYPERV
> static int kvm_ioctl_get_supported_hv_cpuid(struct kvm_vcpu *vcpu,
> struct kvm_cpuid2 __user *cpuid_arg)
> {
> @@ -4547,6 +4555,7 @@ static int kvm_ioctl_get_supported_hv_cpuid(struct kvm_vcpu *vcpu,
>
> return 0;
> }
> +#endif
>
> static bool kvm_is_vm_type_supported(unsigned long type)
> {
> @@ -4580,9 +4589,11 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> case KVM_CAP_PIT_STATE2:
> case KVM_CAP_SET_IDENTITY_MAP_ADDR:
> case KVM_CAP_VCPU_EVENTS:
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_CAP_HYPERV:
> case KVM_CAP_HYPERV_VAPIC:
> case KVM_CAP_HYPERV_SPIN:
> + case KVM_CAP_HYPERV_TIME:
> case KVM_CAP_HYPERV_SYNIC:
> case KVM_CAP_HYPERV_SYNIC2:
> case KVM_CAP_HYPERV_VP_INDEX:
> @@ -4592,6 +4603,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> case KVM_CAP_HYPERV_CPUID:
> case KVM_CAP_HYPERV_ENFORCE_CPUID:
> case KVM_CAP_SYS_HYPERV_CPUID:
> +#endif
> case KVM_CAP_PCI_SEGMENT:
> case KVM_CAP_DEBUGREGS:
> case KVM_CAP_X86_ROBUST_SINGLESTEP:
> @@ -4601,7 +4613,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> case KVM_CAP_GET_TSC_KHZ:
> case KVM_CAP_KVMCLOCK_CTRL:
> case KVM_CAP_READONLY_MEM:
> - case KVM_CAP_HYPERV_TIME:
> case KVM_CAP_IOAPIC_POLARITY_IGNORED:
> case KVM_CAP_TSC_DEADLINE_TIMER:
> case KVM_CAP_DISABLE_QUIRKS:
> @@ -4712,12 +4723,14 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> r = kvm_x86_ops.nested_ops->get_state ?
> kvm_x86_ops.nested_ops->get_state(NULL, NULL, 0) : 0;
> break;
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_CAP_HYPERV_DIRECT_TLBFLUSH:
> r = kvm_x86_ops.enable_l2_tlb_flush != NULL;
> break;
> case KVM_CAP_HYPERV_ENLIGHTENED_VMCS:
> r = kvm_x86_ops.nested_ops->enable_evmcs != NULL;
> break;
> +#endif
> case KVM_CAP_SMALLER_MAXPHYADDR:
> r = (int) allow_smaller_maxphyaddr;
> break;
> @@ -4884,9 +4897,11 @@ long kvm_arch_dev_ioctl(struct file *filp,
> case KVM_GET_MSRS:
> r = msr_io(NULL, argp, do_get_msr_feature, 1);
> break;
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_GET_SUPPORTED_HV_CPUID:
> r = kvm_ioctl_get_supported_hv_cpuid(NULL, argp);
> break;
> +#endif
> case KVM_GET_DEVICE_ATTR: {
> struct kvm_device_attr attr;
> r = -EFAULT;
> @@ -5712,14 +5727,11 @@ static int kvm_vcpu_ioctl_device_attr(struct kvm_vcpu *vcpu,
> static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
> struct kvm_enable_cap *cap)
> {
> - int r;
> - uint16_t vmcs_version;
> - void __user *user_ptr;
> -
> if (cap->flags)
> return -EINVAL;
>
> switch (cap->cap) {
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_CAP_HYPERV_SYNIC2:
> if (cap->args[0])
> return -EINVAL;
> @@ -5731,16 +5743,22 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
> return kvm_hv_activate_synic(vcpu, cap->cap ==
> KVM_CAP_HYPERV_SYNIC2);
> case KVM_CAP_HYPERV_ENLIGHTENED_VMCS:
> - if (!kvm_x86_ops.nested_ops->enable_evmcs)
> - return -ENOTTY;
> - r = kvm_x86_ops.nested_ops->enable_evmcs(vcpu, &vmcs_version);
> - if (!r) {
> - user_ptr = (void __user *)(uintptr_t)cap->args[0];
> - if (copy_to_user(user_ptr, &vmcs_version,
> - sizeof(vmcs_version)))
> - r = -EFAULT;
> + {
> + int r;
> + uint16_t vmcs_version;
> + void __user *user_ptr;
> +
> + if (!kvm_x86_ops.nested_ops->enable_evmcs)
> + return -ENOTTY;
> + r = kvm_x86_ops.nested_ops->enable_evmcs(vcpu, &vmcs_version);
> + if (!r) {
> + user_ptr = (void __user *)(uintptr_t)cap->args[0];
> + if (copy_to_user(user_ptr, &vmcs_version,
> + sizeof(vmcs_version)))
> + r = -EFAULT;
> + }
> + return r;
> }
> - return r;
> case KVM_CAP_HYPERV_DIRECT_TLBFLUSH:
> if (!kvm_x86_ops.enable_l2_tlb_flush)
> return -ENOTTY;
> @@ -5749,6 +5767,7 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
>
> case KVM_CAP_HYPERV_ENFORCE_CPUID:
> return kvm_hv_set_enforce_cpuid(vcpu, cap->args[0]);
> +#endif
>
> case KVM_CAP_ENFORCE_PV_FEATURE_CPUID:
> vcpu->arch.pv_cpuid.enforce = cap->args[0];
> @@ -6141,9 +6160,11 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
> srcu_read_unlock(&vcpu->kvm->srcu, idx);
> break;
> }
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_GET_SUPPORTED_HV_CPUID:
> r = kvm_ioctl_get_supported_hv_cpuid(vcpu, argp);
> break;
> +#endif
> #ifdef CONFIG_KVM_XEN
> case KVM_XEN_VCPU_GET_ATTR: {
> struct kvm_xen_vcpu_attr xva;
> @@ -7201,6 +7222,7 @@ int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
> r = static_call(kvm_x86_mem_enc_unregister_region)(kvm, ®ion);
> break;
> }
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_HYPERV_EVENTFD: {
> struct kvm_hyperv_eventfd hvevfd;
>
> @@ -7210,6 +7232,7 @@ int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
> r = kvm_vm_ioctl_hv_eventfd(kvm, &hvevfd);
> break;
> }
> +#endif
> case KVM_SET_PMU_EVENT_FILTER:
> r = kvm_vm_ioctl_set_pmu_event_filter(kvm, argp);
> break;
> @@ -10588,19 +10611,20 @@ static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu)
>
> static void vcpu_load_eoi_exitmap(struct kvm_vcpu *vcpu)
> {
> - u64 eoi_exit_bitmap[4];
> -
> if (!kvm_apic_hw_enabled(vcpu->arch.apic))
> return;
>
> +#ifdef CONFIG_KVM_HYPERV
> if (to_hv_vcpu(vcpu)) {
> + u64 eoi_exit_bitmap[4];
> +
> bitmap_or((ulong *)eoi_exit_bitmap,
> vcpu->arch.ioapic_handled_vectors,
> to_hv_synic(vcpu)->vec_bitmap, 256);
> static_call_cond(kvm_x86_load_eoi_exitmap)(vcpu, eoi_exit_bitmap);
> return;
> }
> -
> +#endif
> static_call_cond(kvm_x86_load_eoi_exitmap)(
> vcpu, (u64 *)vcpu->arch.ioapic_handled_vectors);
> }
> @@ -10691,9 +10715,11 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
> * the flushes are considered "remote" and not "local" because
> * the requests can be initiated from other vCPUs.
> */
> +#ifdef CONFIG_KVM_HYPERV
> if (kvm_check_request(KVM_REQ_HV_TLB_FLUSH, vcpu) &&
> kvm_hv_vcpu_flush_tlb(vcpu))
> kvm_vcpu_flush_tlb_guest(vcpu);
> +#endif
>
> if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) {
> vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS;
> @@ -10746,6 +10772,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
> vcpu_load_eoi_exitmap(vcpu);
> if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu))
> kvm_vcpu_reload_apic_access_page(vcpu);
> +#ifdef CONFIG_KVM_HYPERV
> if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) {
> vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT;
> vcpu->run->system_event.type = KVM_SYSTEM_EVENT_CRASH;
> @@ -10776,6 +10803,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
> */
> if (kvm_check_request(KVM_REQ_HV_STIMER, vcpu))
> kvm_hv_process_stimers(vcpu);
> +#endif
> if (kvm_check_request(KVM_REQ_APICV_UPDATE, vcpu))
> kvm_vcpu_update_apicv(vcpu);
> if (kvm_check_request(KVM_REQ_APF_READY, vcpu))
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Best regards,
Maxim Levitsky
^ permalink raw reply [flat|nested] 25+ messages in thread
* Re: [PATCH v2 13/16] KVM: nVMX: hyper-v: Introduce nested_vmx_is_evmptr12_{valid,set}() helpers
2023-12-05 10:36 ` [PATCH v2 13/16] KVM: nVMX: hyper-v: Introduce nested_vmx_is_evmptr12_{valid,set}() helpers Vitaly Kuznetsov
@ 2023-12-05 14:53 ` Maxim Levitsky
0 siblings, 0 replies; 25+ messages in thread
From: Maxim Levitsky @ 2023-12-05 14:53 UTC (permalink / raw)
To: Vitaly Kuznetsov, kvm, Paolo Bonzini, Sean Christopherson
On Tue, 2023-12-05 at 11:36 +0100, Vitaly Kuznetsov wrote:
> In order to get rid of raw 'vmx->nested.hv_evmcs_vmptr' accesses when
> !CONFIG_KVM_HYPERV, introduce a pair of helpers:
>
> nested_vmx_is_evmptr12_valid() to check that eVMPTR points to a valid
> address.
>
> nested_vmx_is_evmptr12_valid() to check that eVMPTR either points to a
> valid address or is in 'pending' port-migration state (meaning it is
> supposed to be valid but the exact address wasn't acquired from guest's
> memory yet).
>
> No functional change intended.
>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> ---
> arch/x86/kvm/vmx/hyperv.h | 30 ++++++++++++++++++++++++++++++
> arch/x86/kvm/vmx/nested.c | 38 +++++++++++++++++++-------------------
> arch/x86/kvm/vmx/nested.h | 2 +-
> 3 files changed, 50 insertions(+), 20 deletions(-)
>
> diff --git a/arch/x86/kvm/vmx/hyperv.h b/arch/x86/kvm/vmx/hyperv.h
> index 0e90ef4efe34..71e90a16f183 100644
> --- a/arch/x86/kvm/vmx/hyperv.h
> +++ b/arch/x86/kvm/vmx/hyperv.h
> @@ -22,6 +22,21 @@ static inline bool evmptr_is_valid(u64 evmptr)
> return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
> }
>
> +static inline bool nested_vmx_is_evmptr12_valid(struct vcpu_vmx *vmx)
> +{
> + return evmptr_is_valid(vmx->nested.hv_evmcs_vmptr);
> +}
> +
> +static inline bool evmptr_is_set(u64 evmptr)
> +{
> + return evmptr != EVMPTR_INVALID;
> +}
> +
> +static inline bool nested_vmx_is_evmptr12_set(struct vcpu_vmx *vmx)
> +{
> + return evmptr_is_set(vmx->nested.hv_evmcs_vmptr);
> +}
Looks very good.
> +
> static inline bool guest_cpuid_has_evmcs(struct kvm_vcpu *vcpu)
> {
> /*
> @@ -45,6 +60,21 @@ static inline bool evmptr_is_valid(u64 evmptr)
> {
> return false;
> }
> +
> +static inline bool nested_vmx_is_evmptr12_valid(struct vcpu_vmx *vmx)
> +{
> + return false;
> +}
> +
> +static inline bool evmptr_is_set(u64 evmptr)
> +{
> + return false;
> +}
> +
> +static inline bool nested_vmx_is_evmptr12_set(struct vcpu_vmx *vmx)
> +{
> + return false;
> +}
> #endif
>
> #endif /* __KVM_X86_VMX_HYPERV_H */
> diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
> index 01a94d290c12..0507174750e0 100644
> --- a/arch/x86/kvm/vmx/nested.c
> +++ b/arch/x86/kvm/vmx/nested.c
> @@ -179,7 +179,7 @@ static int nested_vmx_failValid(struct kvm_vcpu *vcpu,
> * VM_INSTRUCTION_ERROR is not shadowed. Enlightened VMCS 'shadows' all
> * fields and thus must be synced.
> */
> - if (to_vmx(vcpu)->nested.hv_evmcs_vmptr != EVMPTR_INVALID)
> + if (nested_vmx_is_evmptr12_set(to_vmx(vcpu)))
> to_vmx(vcpu)->nested.need_vmcs12_to_shadow_sync = true;
>
> return kvm_skip_emulated_instruction(vcpu);
> @@ -194,7 +194,7 @@ static int nested_vmx_fail(struct kvm_vcpu *vcpu, u32 vm_instruction_error)
> * can't be done if there isn't a current VMCS.
> */
> if (vmx->nested.current_vmptr == INVALID_GPA &&
> - !evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
> + !nested_vmx_is_evmptr12_valid(vmx))
> return nested_vmx_failInvalid(vcpu);
>
> return nested_vmx_failValid(vcpu, vm_instruction_error);
> @@ -230,7 +230,7 @@ static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
> struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
> struct vcpu_vmx *vmx = to_vmx(vcpu);
>
> - if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr)) {
> + if (nested_vmx_is_evmptr12_valid(vmx)) {
> kvm_vcpu_unmap(vcpu, &vmx->nested.hv_evmcs_map, true);
> vmx->nested.hv_evmcs = NULL;
> }
> @@ -2123,7 +2123,7 @@ void nested_sync_vmcs12_to_shadow(struct kvm_vcpu *vcpu)
> {
> struct vcpu_vmx *vmx = to_vmx(vcpu);
>
> - if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
> + if (nested_vmx_is_evmptr12_valid(vmx))
> copy_vmcs12_to_enlightened(vmx);
> else
> copy_vmcs12_to_shadow(vmx);
> @@ -2277,7 +2277,7 @@ static void prepare_vmcs02_early(struct vcpu_vmx *vmx, struct loaded_vmcs *vmcs0
> u32 exec_control;
> u64 guest_efer = nested_vmx_calc_efer(vmx, vmcs12);
>
> - if (vmx->nested.dirty_vmcs12 || evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
> + if (vmx->nested.dirty_vmcs12 || nested_vmx_is_evmptr12_valid(vmx))
> prepare_vmcs02_early_rare(vmx, vmcs12);
>
> /*
> @@ -2572,11 +2572,11 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
> struct vcpu_vmx *vmx = to_vmx(vcpu);
> bool load_guest_pdptrs_vmcs12 = false;
>
> - if (vmx->nested.dirty_vmcs12 || evmptr_is_valid(vmx->nested.hv_evmcs_vmptr)) {
> + if (vmx->nested.dirty_vmcs12 || nested_vmx_is_evmptr12_valid(vmx)) {
> prepare_vmcs02_rare(vmx, vmcs12);
> vmx->nested.dirty_vmcs12 = false;
>
> - load_guest_pdptrs_vmcs12 = !evmptr_is_valid(vmx->nested.hv_evmcs_vmptr) ||
> + load_guest_pdptrs_vmcs12 = !nested_vmx_is_evmptr12_valid(vmx) ||
> !(vmx->nested.hv_evmcs->hv_clean_fields &
> HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1);
> }
> @@ -2699,7 +2699,7 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
> * bits when it changes a field in eVMCS. Mark all fields as clean
> * here.
> */
> - if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
> + if (nested_vmx_is_evmptr12_valid(vmx))
> vmx->nested.hv_evmcs->hv_clean_fields |=
> HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL;
>
> @@ -3579,7 +3579,7 @@ enum nvmx_vmentry_status nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu,
>
> load_vmcs12_host_state(vcpu, vmcs12);
> vmcs12->vm_exit_reason = exit_reason.full;
> - if (enable_shadow_vmcs || evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
> + if (enable_shadow_vmcs || nested_vmx_is_evmptr12_valid(vmx))
> vmx->nested.need_vmcs12_to_shadow_sync = true;
> return NVMX_VMENTRY_VMEXIT;
> }
> @@ -3610,7 +3610,7 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch)
> if (CC(evmptrld_status == EVMPTRLD_VMFAIL))
> return nested_vmx_failInvalid(vcpu);
>
> - if (CC(!evmptr_is_valid(vmx->nested.hv_evmcs_vmptr) &&
> + if (CC(!nested_vmx_is_evmptr12_valid(vmx) &&
> vmx->nested.current_vmptr == INVALID_GPA))
> return nested_vmx_failInvalid(vcpu);
>
> @@ -3625,7 +3625,7 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch)
> if (CC(vmcs12->hdr.shadow_vmcs))
> return nested_vmx_failInvalid(vcpu);
>
> - if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr)) {
> + if (nested_vmx_is_evmptr12_valid(vmx)) {
> copy_enlightened_to_vmcs12(vmx, vmx->nested.hv_evmcs->hv_clean_fields);
> /* Enlightened VMCS doesn't have launch state */
> vmcs12->launch_state = !launch;
> @@ -4370,11 +4370,11 @@ static void sync_vmcs02_to_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
> {
> struct vcpu_vmx *vmx = to_vmx(vcpu);
>
> - if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
> + if (nested_vmx_is_evmptr12_valid(vmx))
> sync_vmcs02_to_vmcs12_rare(vcpu, vmcs12);
>
> vmx->nested.need_sync_vmcs02_to_vmcs12_rare =
> - !evmptr_is_valid(vmx->nested.hv_evmcs_vmptr);
> + !nested_vmx_is_evmptr12_valid(vmx);
>
> vmcs12->guest_cr0 = vmcs12_guest_cr0(vcpu, vmcs12);
> vmcs12->guest_cr4 = vmcs12_guest_cr4(vcpu, vmcs12);
> @@ -4897,7 +4897,7 @@ void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
> }
>
> if ((vm_exit_reason != -1) &&
> - (enable_shadow_vmcs || evmptr_is_valid(vmx->nested.hv_evmcs_vmptr)))
> + (enable_shadow_vmcs || nested_vmx_is_evmptr12_valid(vmx)))
> vmx->nested.need_vmcs12_to_shadow_sync = true;
>
> /* in case we halted in L2 */
> @@ -5390,7 +5390,7 @@ static int handle_vmread(struct kvm_vcpu *vcpu)
> /* Decode instruction info and find the field to read */
> field = kvm_register_read(vcpu, (((instr_info) >> 28) & 0xf));
>
> - if (!evmptr_is_valid(vmx->nested.hv_evmcs_vmptr)) {
> + if (!nested_vmx_is_evmptr12_valid(vmx)) {
> /*
> * In VMX non-root operation, when the VMCS-link pointer is INVALID_GPA,
> * any VMREAD sets the ALU flags for VMfailInvalid.
> @@ -5616,7 +5616,7 @@ static int handle_vmptrld(struct kvm_vcpu *vcpu)
> return nested_vmx_fail(vcpu, VMXERR_VMPTRLD_VMXON_POINTER);
>
> /* Forbid normal VMPTRLD if Enlightened version was used */
> - if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
> + if (nested_vmx_is_evmptr12_valid(vmx))
> return 1;
>
> if (vmx->nested.current_vmptr != vmptr) {
> @@ -5679,7 +5679,7 @@ static int handle_vmptrst(struct kvm_vcpu *vcpu)
> if (!nested_vmx_check_permission(vcpu))
> return 1;
>
> - if (unlikely(evmptr_is_valid(to_vmx(vcpu)->nested.hv_evmcs_vmptr)))
> + if (unlikely(nested_vmx_is_evmptr12_valid(to_vmx(vcpu))))
> return 1;
>
> if (get_vmx_mem_address(vcpu, exit_qual, instr_info,
> @@ -6467,7 +6467,7 @@ static int vmx_get_nested_state(struct kvm_vcpu *vcpu,
> kvm_state.size += sizeof(user_vmx_nested_state->vmcs12);
>
> /* 'hv_evmcs_vmptr' can also be EVMPTR_MAP_PENDING here */
> - if (vmx->nested.hv_evmcs_vmptr != EVMPTR_INVALID)
> + if (nested_vmx_is_evmptr12_set(vmx))
> kvm_state.flags |= KVM_STATE_NESTED_EVMCS;
>
> if (is_guest_mode(vcpu) &&
> @@ -6523,7 +6523,7 @@ static int vmx_get_nested_state(struct kvm_vcpu *vcpu,
> } else {
> copy_vmcs02_to_vmcs12_rare(vcpu, get_vmcs12(vcpu));
> if (!vmx->nested.need_vmcs12_to_shadow_sync) {
> - if (evmptr_is_valid(vmx->nested.hv_evmcs_vmptr))
> + if (nested_vmx_is_evmptr12_valid(vmx))
> /*
> * L1 hypervisor is not obliged to keep eVMCS
> * clean fields data always up-to-date while
> diff --git a/arch/x86/kvm/vmx/nested.h b/arch/x86/kvm/vmx/nested.h
> index b0f2e26c1aea..cce4e2aa30fb 100644
> --- a/arch/x86/kvm/vmx/nested.h
> +++ b/arch/x86/kvm/vmx/nested.h
> @@ -58,7 +58,7 @@ static inline int vmx_has_valid_vmcs12(struct kvm_vcpu *vcpu)
>
> /* 'hv_evmcs_vmptr' can also be EVMPTR_MAP_PENDING here */
> return vmx->nested.current_vmptr != -1ull ||
> - vmx->nested.hv_evmcs_vmptr != EVMPTR_INVALID;
> + nested_vmx_is_evmptr12_set(vmx);
> }
>
> static inline u16 nested_get_vpid02(struct kvm_vcpu *vcpu)
Looks even better that previous version,
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Best regards,
Maxim Levitsky
^ permalink raw reply [flat|nested] 25+ messages in thread
* Re: [PATCH v2 12/16] KVM: x86: Make Hyper-V emulation optional
2023-12-05 10:36 ` [PATCH v2 12/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
2023-12-05 14:52 ` Maxim Levitsky
@ 2023-12-06 11:36 ` Jeremi Piotrowski
[not found] ` <46235.123120606372000354@us-mta-490.us.mimecast.lan>
2 siblings, 0 replies; 25+ messages in thread
From: Jeremi Piotrowski @ 2023-12-06 11:36 UTC (permalink / raw)
To: Vitaly Kuznetsov; +Cc: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
On Tue, Dec 05, 2023 at 11:36:26AM +0100, Vitaly Kuznetsov wrote:
> Hyper-V emulation in KVM is a fairly big chunk and in some cases it may be
> desirable to not compile it in to reduce module sizes as well as the attack
> surface. Introduce CONFIG_KVM_HYPERV option to make it possible.
>
> Note, there's room for further nVMX/nSVM code optimizations when
> !CONFIG_KVM_HYPERV, this will be done in follow-up patches.
>
> Reorganize Makefile a bit so all CONFIG_HYPERV and CONFIG_KVM_HYPERV files
> are grouped together.
>
Wanted to test this for the case where KVM is running as a nested hypervisor on
Hyper-V but it doesn't apply cleanly - what base did you use? Tried v6.6,
v6.7-rc1, and v6.7-rc4.
Jeremi
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> ---
> arch/x86/include/asm/kvm_host.h | 6 ++++
> arch/x86/kvm/Kconfig | 14 ++++++++
> arch/x86/kvm/Makefile | 20 +++++------
> arch/x86/kvm/cpuid.c | 6 ++++
> arch/x86/kvm/hyperv.h | 61 +++++++++++++++++++++++++++++++-
> arch/x86/kvm/irq_comm.c | 9 ++++-
> arch/x86/kvm/svm/hyperv.h | 9 +++++
> arch/x86/kvm/vmx/hyperv.h | 17 ++++++---
> arch/x86/kvm/vmx/nested.c | 30 ++++++++++++++++
> arch/x86/kvm/vmx/vmx.c | 2 ++
> arch/x86/kvm/x86.c | 62 ++++++++++++++++++++++++---------
> 11 files changed, 201 insertions(+), 35 deletions(-)
>
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 9dab2f7de495..3b8c63767554 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -937,8 +937,10 @@ struct kvm_vcpu_arch {
> /* used for guest single stepping over the given code position */
> unsigned long singlestep_rip;
>
> +#ifdef CONFIG_KVM_HYPERV
> bool hyperv_enabled;
> struct kvm_vcpu_hv *hyperv;
> +#endif
> #ifdef CONFIG_KVM_XEN
> struct kvm_vcpu_xen xen;
> #endif
> @@ -1095,6 +1097,7 @@ enum hv_tsc_page_status {
> HV_TSC_PAGE_BROKEN,
> };
>
> +#ifdef CONFIG_KVM_HYPERV
> /* Hyper-V emulation context */
> struct kvm_hv {
> struct mutex hv_lock;
> @@ -1127,6 +1130,7 @@ struct kvm_hv {
>
> struct kvm_hv_syndbg hv_syndbg;
> };
> +#endif
>
> struct msr_bitmap_range {
> u32 flags;
> @@ -1349,7 +1353,9 @@ struct kvm_arch {
> /* reads protected by irq_srcu, writes by irq_lock */
> struct hlist_head mask_notifier_list;
>
> +#ifdef CONFIG_KVM_HYPERV
> struct kvm_hv hyperv;
> +#endif
>
> #ifdef CONFIG_KVM_XEN
> struct kvm_xen xen;
> diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
> index c1716e83d176..34f2f47cadf2 100644
> --- a/arch/x86/kvm/Kconfig
> +++ b/arch/x86/kvm/Kconfig
> @@ -141,6 +141,20 @@ config KVM_SMM
>
> If unsure, say Y.
>
> +config KVM_HYPERV
> + bool "Support for Microsoft Hyper-V emulation"
> + depends on KVM
> + default y
> + help
> + Provides KVM support for emulating Microsoft Hyper-V. This allows KVM
> + to expose a subset of the paravirtualized interfaces defined in the
> + Hyper-V Hypervisor Top-Level Functional Specification (TLFS):
> + https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs
> + These interfaces are required for the correct and performant functioning
> + of Windows and Hyper-V guests on KVM.
> +
> + If unsure, say "Y".
> +
> config KVM_XEN
> bool "Support for Xen hypercall interface"
> depends on KVM
> diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
> index 8ea872401cd6..475b5fa917a6 100644
> --- a/arch/x86/kvm/Makefile
> +++ b/arch/x86/kvm/Makefile
> @@ -11,29 +11,27 @@ include $(srctree)/virt/kvm/Makefile.kvm
>
> kvm-y += x86.o emulate.o i8259.o irq.o lapic.o \
> i8254.o ioapic.o irq_comm.o cpuid.o pmu.o mtrr.o \
> - hyperv.o debugfs.o mmu/mmu.o mmu/page_track.o \
> + debugfs.o mmu/mmu.o mmu/page_track.o \
> mmu/spte.o
>
> -ifdef CONFIG_HYPERV
> -kvm-y += kvm_onhyperv.o
> -endif
> -
> kvm-$(CONFIG_X86_64) += mmu/tdp_iter.o mmu/tdp_mmu.o
> +kvm-$(CONFIG_KVM_HYPERV) += hyperv.o
> kvm-$(CONFIG_KVM_XEN) += xen.o
> kvm-$(CONFIG_KVM_SMM) += smm.o
>
> kvm-intel-y += vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o vmx/vmcs12.o \
> - vmx/hyperv.o vmx/hyperv_evmcs.o vmx/nested.o vmx/posted_intr.o
> -kvm-intel-$(CONFIG_X86_SGX_KVM) += vmx/sgx.o
> + vmx/nested.o vmx/posted_intr.o
>
> -ifdef CONFIG_HYPERV
> -kvm-intel-y += vmx/vmx_onhyperv.o
> -endif
> +kvm-intel-$(CONFIG_X86_SGX_KVM) += vmx/sgx.o
> +kvm-intel-$(CONFIG_KVM_HYPERV) += vmx/hyperv.o vmx/hyperv_evmcs.o
>
> kvm-amd-y += svm/svm.o svm/vmenter.o svm/pmu.o svm/nested.o svm/avic.o \
> - svm/sev.o svm/hyperv.o
> + svm/sev.o
> +kvm-amd-$(CONFIG_KVM_HYPERV) += svm/hyperv.o
>
> ifdef CONFIG_HYPERV
> +kvm-y += kvm_onhyperv.o
> +kvm-intel-y += vmx/vmx_onhyperv.o vmx/hyperv_evmcs.o
> kvm-amd-y += svm/svm_onhyperv.o
> endif
>
> diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
> index dda6fc4cfae8..1b278a3f0689 100644
> --- a/arch/x86/kvm/cpuid.c
> +++ b/arch/x86/kvm/cpuid.c
> @@ -314,11 +314,15 @@ EXPORT_SYMBOL_GPL(kvm_update_cpuid_runtime);
>
> static bool kvm_cpuid_has_hyperv(struct kvm_cpuid_entry2 *entries, int nent)
> {
> +#ifdef CONFIG_KVM_HYPERV
> struct kvm_cpuid_entry2 *entry;
>
> entry = cpuid_entry2_find(entries, nent, HYPERV_CPUID_INTERFACE,
> KVM_CPUID_INDEX_NOT_SIGNIFICANT);
> return entry && entry->eax == HYPERV_CPUID_SIGNATURE_EAX;
> +#else
> + return false;
> +#endif
> }
>
> static void kvm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
> @@ -433,11 +437,13 @@ static int kvm_set_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid_entry2 *e2,
> return 0;
> }
>
> +#ifdef CONFIG_KVM_HYPERV
> if (kvm_cpuid_has_hyperv(e2, nent)) {
> r = kvm_hv_vcpu_init(vcpu);
> if (r)
> return r;
> }
> +#endif
>
> r = kvm_check_cpuid(vcpu, e2, nent);
> if (r)
> diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h
> index 75dcbe598fbc..53eb3bf56bdf 100644
> --- a/arch/x86/kvm/hyperv.h
> +++ b/arch/x86/kvm/hyperv.h
> @@ -24,6 +24,8 @@
> #include <linux/kvm_host.h>
> #include "x86.h"
>
> +#ifdef CONFIG_KVM_HYPERV
> +
> /* "Hv#1" signature */
> #define HYPERV_CPUID_SIGNATURE_EAX 0x31237648
>
> @@ -259,5 +261,62 @@ static inline void kvm_hv_nested_transtion_tlb_flush(struct kvm_vcpu *vcpu, bool
> }
>
> int kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu);
> +#else /* CONFIG_KVM_HYPERV */
> +static inline void kvm_hv_setup_tsc_page(struct kvm *kvm,
> + struct pvclock_vcpu_time_info *hv_clock) {}
> +static inline void kvm_hv_request_tsc_page_update(struct kvm *kvm) {}
> +static inline void kvm_hv_init_vm(struct kvm *kvm) {}
> +static inline void kvm_hv_destroy_vm(struct kvm *kvm) {}
> +static inline int kvm_hv_vcpu_init(struct kvm_vcpu *vcpu)
> +{
> + return 0;
> +}
> +static inline void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu) {}
> +static inline bool kvm_hv_hypercall_enabled(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +static inline int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
> +{
> + return HV_STATUS_ACCESS_DENIED;
> +}
> +static inline void kvm_hv_vcpu_purge_flush_tlb(struct kvm_vcpu *vcpu) {}
> +static inline void kvm_hv_free_pa_page(struct kvm *kvm) {}
> +static inline bool kvm_hv_synic_has_vector(struct kvm_vcpu *vcpu, int vector)
> +{
> + return false;
> +}
> +static inline bool kvm_hv_synic_auto_eoi_set(struct kvm_vcpu *vcpu, int vector)
> +{
> + return false;
> +}
> +static inline void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector) {}
> +static inline bool kvm_hv_invtsc_suppressed(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +static inline void kvm_hv_set_cpuid(struct kvm_vcpu *vcpu, bool hyperv_enabled) {}
> +static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +static inline bool kvm_hv_is_tlb_flush_hcall(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +static inline bool guest_hv_cpuid_has_l2_tlb_flush(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +static inline int kvm_hv_verify_vp_assist(struct kvm_vcpu *vcpu)
> +{
> + return 0;
> +}
> +static inline u32 kvm_hv_get_vpindex(struct kvm_vcpu *vcpu)
> +{
> + return vcpu->vcpu_idx;
> +}
> +static inline void kvm_hv_nested_transtion_tlb_flush(struct kvm_vcpu *vcpu, bool tdp_enabled) {}
> +#endif /* CONFIG_KVM_HYPERV */
>
> -#endif
> +#endif /* __ARCH_X86_KVM_HYPERV_H__ */
> diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
> index 16d076a1b91a..68f3f6c26046 100644
> --- a/arch/x86/kvm/irq_comm.c
> +++ b/arch/x86/kvm/irq_comm.c
> @@ -144,7 +144,7 @@ int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
> return kvm_irq_delivery_to_apic(kvm, NULL, &irq, NULL);
> }
>
> -
> +#ifdef CONFIG_KVM_HYPERV
> static int kvm_hv_set_sint(struct kvm_kernel_irq_routing_entry *e,
> struct kvm *kvm, int irq_source_id, int level,
> bool line_status)
> @@ -154,6 +154,7 @@ static int kvm_hv_set_sint(struct kvm_kernel_irq_routing_entry *e,
>
> return kvm_hv_synic_set_irq(kvm, e->hv_sint.vcpu, e->hv_sint.sint);
> }
> +#endif
>
> int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
> struct kvm *kvm, int irq_source_id, int level,
> @@ -163,9 +164,11 @@ int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
> int r;
>
> switch (e->type) {
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_IRQ_ROUTING_HV_SINT:
> return kvm_hv_set_sint(e, kvm, irq_source_id, level,
> line_status);
> +#endif
>
> case KVM_IRQ_ROUTING_MSI:
> if (kvm_msi_route_invalid(kvm, e))
> @@ -314,11 +317,13 @@ int kvm_set_routing_entry(struct kvm *kvm,
> if (kvm_msi_route_invalid(kvm, e))
> return -EINVAL;
> break;
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_IRQ_ROUTING_HV_SINT:
> e->set = kvm_hv_set_sint;
> e->hv_sint.vcpu = ue->u.hv_sint.vcpu;
> e->hv_sint.sint = ue->u.hv_sint.sint;
> break;
> +#endif
> #ifdef CONFIG_KVM_XEN
> case KVM_IRQ_ROUTING_XEN_EVTCHN:
> return kvm_xen_setup_evtchn(kvm, e, ue);
> @@ -438,5 +443,7 @@ void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
>
> void kvm_arch_irq_routing_update(struct kvm *kvm)
> {
> +#ifdef CONFIG_KVM_HYPERV
> kvm_hv_irq_routing_update(kvm);
> +#endif
> }
> diff --git a/arch/x86/kvm/svm/hyperv.h b/arch/x86/kvm/svm/hyperv.h
> index 02f4784b5d44..d3f8bfc05832 100644
> --- a/arch/x86/kvm/svm/hyperv.h
> +++ b/arch/x86/kvm/svm/hyperv.h
> @@ -11,6 +11,7 @@
> #include "../hyperv.h"
> #include "svm.h"
>
> +#ifdef CONFIG_KVM_HYPERV
> static inline void nested_svm_hv_update_vm_vp_ids(struct kvm_vcpu *vcpu)
> {
> struct vcpu_svm *svm = to_svm(vcpu);
> @@ -41,5 +42,13 @@ static inline bool nested_svm_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu)
> }
>
> void svm_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu);
> +#else /* CONFIG_KVM_HYPERV */
> +static inline void nested_svm_hv_update_vm_vp_ids(struct kvm_vcpu *vcpu) {}
> +static inline bool nested_svm_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu)
> +{
> + return false;
> +}
> +static inline void svm_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu) {}
> +#endif /* CONFIG_KVM_HYPERV */
>
> #endif /* __ARCH_X86_KVM_SVM_HYPERV_H__ */
> diff --git a/arch/x86/kvm/vmx/hyperv.h b/arch/x86/kvm/vmx/hyperv.h
> index 6e1ee951e360..0e90ef4efe34 100644
> --- a/arch/x86/kvm/vmx/hyperv.h
> +++ b/arch/x86/kvm/vmx/hyperv.h
> @@ -9,11 +9,6 @@
> #define EVMPTR_INVALID (-1ULL)
> #define EVMPTR_MAP_PENDING (-2ULL)
>
> -static inline bool evmptr_is_valid(u64 evmptr)
> -{
> - return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
> -}
> -
> enum nested_evmptrld_status {
> EVMPTRLD_DISABLED,
> EVMPTRLD_SUCCEEDED,
> @@ -21,6 +16,12 @@ enum nested_evmptrld_status {
> EVMPTRLD_ERROR,
> };
>
> +#ifdef CONFIG_KVM_HYPERV
> +static inline bool evmptr_is_valid(u64 evmptr)
> +{
> + return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
> +}
> +
> static inline bool guest_cpuid_has_evmcs(struct kvm_vcpu *vcpu)
> {
> /*
> @@ -39,5 +40,11 @@ void nested_evmcs_filter_control_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *
> int nested_evmcs_check_controls(struct vmcs12 *vmcs12);
> bool nested_evmcs_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu);
> void vmx_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu);
> +#else
> +static inline bool evmptr_is_valid(u64 evmptr)
> +{
> + return false;
> +}
> +#endif
>
> #endif /* __KVM_X86_VMX_HYPERV_H */
> diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
> index 903b6f9ea2bd..01a94d290c12 100644
> --- a/arch/x86/kvm/vmx/nested.c
> +++ b/arch/x86/kvm/vmx/nested.c
> @@ -226,6 +226,7 @@ static void vmx_disable_shadow_vmcs(struct vcpu_vmx *vmx)
>
> static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
> {
> +#ifdef CONFIG_KVM_HYPERV
> struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
> struct vcpu_vmx *vmx = to_vmx(vcpu);
>
> @@ -241,10 +242,12 @@ static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
> hv_vcpu->nested.vm_id = 0;
> hv_vcpu->nested.vp_id = 0;
> }
> +#endif
> }
>
> static bool nested_evmcs_handle_vmclear(struct kvm_vcpu *vcpu, gpa_t vmptr)
> {
> +#ifdef CONFIG_KVM_HYPERV
> struct vcpu_vmx *vmx = to_vmx(vcpu);
> /*
> * When Enlightened VMEntry is enabled on the calling CPU we treat
> @@ -264,6 +267,9 @@ static bool nested_evmcs_handle_vmclear(struct kvm_vcpu *vcpu, gpa_t vmptr)
> nested_release_evmcs(vcpu);
>
> return true;
> +#else
> + return false;
> +#endif
> }
>
> static void vmx_sync_vmcs_host_state(struct vcpu_vmx *vmx,
> @@ -1595,6 +1601,7 @@ static void copy_vmcs12_to_shadow(struct vcpu_vmx *vmx)
>
> static void copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx, u32 hv_clean_fields)
> {
> +#ifdef CONFIG_KVM_HYPERV
> struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12;
> struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
> struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(&vmx->vcpu);
> @@ -1835,10 +1842,14 @@ static void copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx, u32 hv_clean_fields
> */
>
> return;
> +#else /* CONFIG_KVM_HYPERV */
> + KVM_BUG_ON(1, vmx->vcpu.kvm);
> +#endif /* CONFIG_KVM_HYPERV */
> }
>
> static void copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
> {
> +#ifdef CONFIG_KVM_HYPERV
> struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12;
> struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
>
> @@ -2009,6 +2020,9 @@ static void copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
> evmcs->guest_bndcfgs = vmcs12->guest_bndcfgs;
>
> return;
> +#else /* CONFIG_KVM_HYPERV */
> + KVM_BUG_ON(1, vmx->vcpu.kvm);
> +#endif /* CONFIG_KVM_HYPERV */
> }
>
> /*
> @@ -2018,6 +2032,7 @@ static void copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
> static enum nested_evmptrld_status nested_vmx_handle_enlightened_vmptrld(
> struct kvm_vcpu *vcpu, bool from_launch)
> {
> +#ifdef CONFIG_KVM_HYPERV
> struct vcpu_vmx *vmx = to_vmx(vcpu);
> bool evmcs_gpa_changed = false;
> u64 evmcs_gpa;
> @@ -2099,6 +2114,9 @@ static enum nested_evmptrld_status nested_vmx_handle_enlightened_vmptrld(
> }
>
> return EVMPTRLD_SUCCEEDED;
> +#else
> + return EVMPTRLD_DISABLED;
> +#endif
> }
>
> void nested_sync_vmcs12_to_shadow(struct kvm_vcpu *vcpu)
> @@ -2905,8 +2923,10 @@ static int nested_vmx_check_controls(struct kvm_vcpu *vcpu,
> nested_check_vm_entry_controls(vcpu, vmcs12))
> return -EINVAL;
>
> +#ifdef CONFIG_KVM_HYPERV
> if (guest_cpuid_has_evmcs(vcpu))
> return nested_evmcs_check_controls(vmcs12);
> +#endif
>
> return 0;
> }
> @@ -3178,6 +3198,7 @@ static int nested_vmx_check_vmentry_hw(struct kvm_vcpu *vcpu)
> return 0;
> }
>
> +#ifdef CONFIG_KVM_HYPERV
> static bool nested_get_evmcs_page(struct kvm_vcpu *vcpu)
> {
> struct vcpu_vmx *vmx = to_vmx(vcpu);
> @@ -3205,6 +3226,7 @@ static bool nested_get_evmcs_page(struct kvm_vcpu *vcpu)
>
> return true;
> }
> +#endif
>
> static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu)
> {
> @@ -3296,6 +3318,7 @@ static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu)
>
> static bool vmx_get_nested_state_pages(struct kvm_vcpu *vcpu)
> {
> +#ifdef CONFIG_KVM_HYPERV
> /*
> * Note: nested_get_evmcs_page() also updates 'vp_assist_page' copy
> * in 'struct kvm_vcpu_hv' in case eVMCS is in use, this is mandatory
> @@ -3312,6 +3335,7 @@ static bool vmx_get_nested_state_pages(struct kvm_vcpu *vcpu)
>
> return false;
> }
> +#endif
>
> if (is_guest_mode(vcpu) && !nested_get_vmcs12_pages(vcpu))
> return false;
> @@ -4749,6 +4773,7 @@ void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
> /* trying to cancel vmlaunch/vmresume is a bug */
> WARN_ON_ONCE(vmx->nested.nested_run_pending);
>
> +#ifdef CONFIG_KVM_HYPERV
> if (kvm_check_request(KVM_REQ_GET_NESTED_STATE_PAGES, vcpu)) {
> /*
> * KVM_REQ_GET_NESTED_STATE_PAGES is also used to map
> @@ -4758,6 +4783,7 @@ void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
> */
> (void)nested_get_evmcs_page(vcpu);
> }
> +#endif
>
> /* Service pending TLB flush requests for L2 before switching to L1. */
> kvm_service_local_tlb_flush_requests(vcpu);
> @@ -6212,11 +6238,13 @@ static bool nested_vmx_l0_wants_exit(struct kvm_vcpu *vcpu,
> * Handle L2's bus locks in L0 directly.
> */
> return true;
> +#ifdef CONFIG_KVM_HYPERV
> case EXIT_REASON_VMCALL:
> /* Hyper-V L2 TLB flush hypercall is handled by L0 */
> return guest_hv_cpuid_has_l2_tlb_flush(vcpu) &&
> nested_evmcs_l2_tlb_flush_enabled(vcpu) &&
> kvm_hv_is_tlb_flush_hcall(vcpu);
> +#endif
> default:
> break;
> }
> @@ -7100,7 +7128,9 @@ struct kvm_x86_nested_ops vmx_nested_ops = {
> .set_state = vmx_set_nested_state,
> .get_nested_state_pages = vmx_get_nested_state_pages,
> .write_log_dirty = nested_vmx_write_pml_buffer,
> +#ifdef CONFIG_KVM_HYPERV
> .enable_evmcs = nested_enable_evmcs,
> .get_evmcs_version = nested_get_evmcs_version,
> .hv_inject_synthetic_vmexit_post_tlb_flush = vmx_hv_inject_synthetic_vmexit_post_tlb_flush,
> +#endif
> };
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index 552593a2ac14..3ff5c44dff9d 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -2048,6 +2048,7 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> if (vmx_get_vmx_msr(&vmx->nested.msrs, msr_info->index,
> &msr_info->data))
> return 1;
> +#ifdef CONFIG_KVM_HYPERV
> /*
> * Enlightened VMCS v1 doesn't have certain VMCS fields but
> * instead of just ignoring the features, different Hyper-V
> @@ -2058,6 +2059,7 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> if (!msr_info->host_initiated && guest_cpuid_has_evmcs(vcpu))
> nested_evmcs_filter_control_msr(vcpu, msr_info->index,
> &msr_info->data);
> +#endif
> break;
> case MSR_IA32_RTIT_CTL:
> if (!vmx_pt_mode_is_host_guest())
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 81224b9676d9..598b057611e0 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -1504,6 +1504,8 @@ static unsigned num_msrs_to_save;
> static const u32 emulated_msrs_all[] = {
> MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
> MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW,
> +
> +#ifdef CONFIG_KVM_HYPERV
> HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL,
> HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC,
> HV_X64_MSR_TSC_FREQUENCY, HV_X64_MSR_APIC_FREQUENCY,
> @@ -1521,6 +1523,7 @@ static const u32 emulated_msrs_all[] = {
> HV_X64_MSR_SYNDBG_CONTROL, HV_X64_MSR_SYNDBG_STATUS,
> HV_X64_MSR_SYNDBG_SEND_BUFFER, HV_X64_MSR_SYNDBG_RECV_BUFFER,
> HV_X64_MSR_SYNDBG_PENDING_BUFFER,
> +#endif
>
> MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME,
> MSR_KVM_PV_EOI_EN, MSR_KVM_ASYNC_PF_INT, MSR_KVM_ASYNC_PF_ACK,
> @@ -4020,6 +4023,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> * the need to ignore the workaround.
> */
> break;
> +#ifdef CONFIG_KVM_HYPERV
> case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
> case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
> case HV_X64_MSR_SYNDBG_OPTIONS:
> @@ -4032,6 +4036,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> case HV_X64_MSR_TSC_INVARIANT_CONTROL:
> return kvm_hv_set_msr_common(vcpu, msr, data,
> msr_info->host_initiated);
> +#endif
> case MSR_IA32_BBL_CR_CTL3:
> /* Drop writes to this legacy MSR -- see rdmsr
> * counterpart for further detail.
> @@ -4377,6 +4382,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> */
> msr_info->data = 0x20000000;
> break;
> +#ifdef CONFIG_KVM_HYPERV
> case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
> case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
> case HV_X64_MSR_SYNDBG_OPTIONS:
> @@ -4390,6 +4396,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> return kvm_hv_get_msr_common(vcpu,
> msr_info->index, &msr_info->data,
> msr_info->host_initiated);
> +#endif
> case MSR_IA32_BBL_CR_CTL3:
> /* This legacy MSR exists but isn't fully documented in current
> * silicon. It is however accessed by winxp in very narrow
> @@ -4527,6 +4534,7 @@ static inline bool kvm_can_mwait_in_guest(void)
> boot_cpu_has(X86_FEATURE_ARAT);
> }
>
> +#ifdef CONFIG_KVM_HYPERV
> static int kvm_ioctl_get_supported_hv_cpuid(struct kvm_vcpu *vcpu,
> struct kvm_cpuid2 __user *cpuid_arg)
> {
> @@ -4547,6 +4555,7 @@ static int kvm_ioctl_get_supported_hv_cpuid(struct kvm_vcpu *vcpu,
>
> return 0;
> }
> +#endif
>
> static bool kvm_is_vm_type_supported(unsigned long type)
> {
> @@ -4580,9 +4589,11 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> case KVM_CAP_PIT_STATE2:
> case KVM_CAP_SET_IDENTITY_MAP_ADDR:
> case KVM_CAP_VCPU_EVENTS:
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_CAP_HYPERV:
> case KVM_CAP_HYPERV_VAPIC:
> case KVM_CAP_HYPERV_SPIN:
> + case KVM_CAP_HYPERV_TIME:
> case KVM_CAP_HYPERV_SYNIC:
> case KVM_CAP_HYPERV_SYNIC2:
> case KVM_CAP_HYPERV_VP_INDEX:
> @@ -4592,6 +4603,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> case KVM_CAP_HYPERV_CPUID:
> case KVM_CAP_HYPERV_ENFORCE_CPUID:
> case KVM_CAP_SYS_HYPERV_CPUID:
> +#endif
> case KVM_CAP_PCI_SEGMENT:
> case KVM_CAP_DEBUGREGS:
> case KVM_CAP_X86_ROBUST_SINGLESTEP:
> @@ -4601,7 +4613,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> case KVM_CAP_GET_TSC_KHZ:
> case KVM_CAP_KVMCLOCK_CTRL:
> case KVM_CAP_READONLY_MEM:
> - case KVM_CAP_HYPERV_TIME:
> case KVM_CAP_IOAPIC_POLARITY_IGNORED:
> case KVM_CAP_TSC_DEADLINE_TIMER:
> case KVM_CAP_DISABLE_QUIRKS:
> @@ -4712,12 +4723,14 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> r = kvm_x86_ops.nested_ops->get_state ?
> kvm_x86_ops.nested_ops->get_state(NULL, NULL, 0) : 0;
> break;
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_CAP_HYPERV_DIRECT_TLBFLUSH:
> r = kvm_x86_ops.enable_l2_tlb_flush != NULL;
> break;
> case KVM_CAP_HYPERV_ENLIGHTENED_VMCS:
> r = kvm_x86_ops.nested_ops->enable_evmcs != NULL;
> break;
> +#endif
> case KVM_CAP_SMALLER_MAXPHYADDR:
> r = (int) allow_smaller_maxphyaddr;
> break;
> @@ -4884,9 +4897,11 @@ long kvm_arch_dev_ioctl(struct file *filp,
> case KVM_GET_MSRS:
> r = msr_io(NULL, argp, do_get_msr_feature, 1);
> break;
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_GET_SUPPORTED_HV_CPUID:
> r = kvm_ioctl_get_supported_hv_cpuid(NULL, argp);
> break;
> +#endif
> case KVM_GET_DEVICE_ATTR: {
> struct kvm_device_attr attr;
> r = -EFAULT;
> @@ -5712,14 +5727,11 @@ static int kvm_vcpu_ioctl_device_attr(struct kvm_vcpu *vcpu,
> static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
> struct kvm_enable_cap *cap)
> {
> - int r;
> - uint16_t vmcs_version;
> - void __user *user_ptr;
> -
> if (cap->flags)
> return -EINVAL;
>
> switch (cap->cap) {
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_CAP_HYPERV_SYNIC2:
> if (cap->args[0])
> return -EINVAL;
> @@ -5731,16 +5743,22 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
> return kvm_hv_activate_synic(vcpu, cap->cap ==
> KVM_CAP_HYPERV_SYNIC2);
> case KVM_CAP_HYPERV_ENLIGHTENED_VMCS:
> - if (!kvm_x86_ops.nested_ops->enable_evmcs)
> - return -ENOTTY;
> - r = kvm_x86_ops.nested_ops->enable_evmcs(vcpu, &vmcs_version);
> - if (!r) {
> - user_ptr = (void __user *)(uintptr_t)cap->args[0];
> - if (copy_to_user(user_ptr, &vmcs_version,
> - sizeof(vmcs_version)))
> - r = -EFAULT;
> + {
> + int r;
> + uint16_t vmcs_version;
> + void __user *user_ptr;
> +
> + if (!kvm_x86_ops.nested_ops->enable_evmcs)
> + return -ENOTTY;
> + r = kvm_x86_ops.nested_ops->enable_evmcs(vcpu, &vmcs_version);
> + if (!r) {
> + user_ptr = (void __user *)(uintptr_t)cap->args[0];
> + if (copy_to_user(user_ptr, &vmcs_version,
> + sizeof(vmcs_version)))
> + r = -EFAULT;
> + }
> + return r;
> }
> - return r;
> case KVM_CAP_HYPERV_DIRECT_TLBFLUSH:
> if (!kvm_x86_ops.enable_l2_tlb_flush)
> return -ENOTTY;
> @@ -5749,6 +5767,7 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
>
> case KVM_CAP_HYPERV_ENFORCE_CPUID:
> return kvm_hv_set_enforce_cpuid(vcpu, cap->args[0]);
> +#endif
>
> case KVM_CAP_ENFORCE_PV_FEATURE_CPUID:
> vcpu->arch.pv_cpuid.enforce = cap->args[0];
> @@ -6141,9 +6160,11 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
> srcu_read_unlock(&vcpu->kvm->srcu, idx);
> break;
> }
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_GET_SUPPORTED_HV_CPUID:
> r = kvm_ioctl_get_supported_hv_cpuid(vcpu, argp);
> break;
> +#endif
> #ifdef CONFIG_KVM_XEN
> case KVM_XEN_VCPU_GET_ATTR: {
> struct kvm_xen_vcpu_attr xva;
> @@ -7201,6 +7222,7 @@ int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
> r = static_call(kvm_x86_mem_enc_unregister_region)(kvm, ®ion);
> break;
> }
> +#ifdef CONFIG_KVM_HYPERV
> case KVM_HYPERV_EVENTFD: {
> struct kvm_hyperv_eventfd hvevfd;
>
> @@ -7210,6 +7232,7 @@ int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
> r = kvm_vm_ioctl_hv_eventfd(kvm, &hvevfd);
> break;
> }
> +#endif
> case KVM_SET_PMU_EVENT_FILTER:
> r = kvm_vm_ioctl_set_pmu_event_filter(kvm, argp);
> break;
> @@ -10588,19 +10611,20 @@ static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu)
>
> static void vcpu_load_eoi_exitmap(struct kvm_vcpu *vcpu)
> {
> - u64 eoi_exit_bitmap[4];
> -
> if (!kvm_apic_hw_enabled(vcpu->arch.apic))
> return;
>
> +#ifdef CONFIG_KVM_HYPERV
> if (to_hv_vcpu(vcpu)) {
> + u64 eoi_exit_bitmap[4];
> +
> bitmap_or((ulong *)eoi_exit_bitmap,
> vcpu->arch.ioapic_handled_vectors,
> to_hv_synic(vcpu)->vec_bitmap, 256);
> static_call_cond(kvm_x86_load_eoi_exitmap)(vcpu, eoi_exit_bitmap);
> return;
> }
> -
> +#endif
> static_call_cond(kvm_x86_load_eoi_exitmap)(
> vcpu, (u64 *)vcpu->arch.ioapic_handled_vectors);
> }
> @@ -10691,9 +10715,11 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
> * the flushes are considered "remote" and not "local" because
> * the requests can be initiated from other vCPUs.
> */
> +#ifdef CONFIG_KVM_HYPERV
> if (kvm_check_request(KVM_REQ_HV_TLB_FLUSH, vcpu) &&
> kvm_hv_vcpu_flush_tlb(vcpu))
> kvm_vcpu_flush_tlb_guest(vcpu);
> +#endif
>
> if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) {
> vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS;
> @@ -10746,6 +10772,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
> vcpu_load_eoi_exitmap(vcpu);
> if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu))
> kvm_vcpu_reload_apic_access_page(vcpu);
> +#ifdef CONFIG_KVM_HYPERV
> if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) {
> vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT;
> vcpu->run->system_event.type = KVM_SYSTEM_EVENT_CRASH;
> @@ -10776,6 +10803,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
> */
> if (kvm_check_request(KVM_REQ_HV_STIMER, vcpu))
> kvm_hv_process_stimers(vcpu);
> +#endif
> if (kvm_check_request(KVM_REQ_APICV_UPDATE, vcpu))
> kvm_vcpu_update_apicv(vcpu);
> if (kvm_check_request(KVM_REQ_APF_READY, vcpu))
> --
> 2.43.0
>
^ permalink raw reply [flat|nested] 25+ messages in thread
* Re: [PATCH v2 12/16] KVM: x86: Make Hyper-V emulation optional
[not found] ` <46235.123120606372000354@us-mta-490.us.mimecast.lan>
@ 2023-12-06 12:36 ` Vitaly Kuznetsov
2023-12-07 12:06 ` Jeremi Piotrowski
0 siblings, 1 reply; 25+ messages in thread
From: Vitaly Kuznetsov @ 2023-12-06 12:36 UTC (permalink / raw)
To: Jeremi Piotrowski; +Cc: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
Jeremi Piotrowski <jpiotrowski@linux.microsoft.com> writes:
> On Tue, Dec 05, 2023 at 11:36:26AM +0100, Vitaly Kuznetsov wrote:
>> Hyper-V emulation in KVM is a fairly big chunk and in some cases it may be
>> desirable to not compile it in to reduce module sizes as well as the attack
>> surface. Introduce CONFIG_KVM_HYPERV option to make it possible.
>>
>> Note, there's room for further nVMX/nSVM code optimizations when
>> !CONFIG_KVM_HYPERV, this will be done in follow-up patches.
>>
>> Reorganize Makefile a bit so all CONFIG_HYPERV and CONFIG_KVM_HYPERV files
>> are grouped together.
>>
>
> Wanted to test this for the case where KVM is running as a nested hypervisor on
> Hyper-V but it doesn't apply cleanly - what base did you use? Tried v6.6,
> v6.7-rc1, and v6.7-rc4.
Hi Jeremi,
the base was 'kvm/next' (git://git.kernel.org/pub/scm/virt/kvm/kvm.git,
'next' branch):
commit e9e60c82fe391d04db55a91c733df4a017c28b2f (kvm/next)
Author: Paolo Bonzini <pbonzini@redhat.com>
Date: Tue Nov 21 11:24:08 2023 -0500
selftests/kvm: fix compilation on non-x86_64 platforms
--
Vitaly
^ permalink raw reply [flat|nested] 25+ messages in thread
* Re: [PATCH v2 12/16] KVM: x86: Make Hyper-V emulation optional
2023-12-06 12:36 ` Vitaly Kuznetsov
@ 2023-12-07 12:06 ` Jeremi Piotrowski
0 siblings, 0 replies; 25+ messages in thread
From: Jeremi Piotrowski @ 2023-12-07 12:06 UTC (permalink / raw)
To: Vitaly Kuznetsov; +Cc: kvm, Paolo Bonzini, Sean Christopherson, Maxim Levitsky
On 06/12/2023 13:36, Vitaly Kuznetsov wrote:
> Jeremi Piotrowski <jpiotrowski@linux.microsoft.com> writes:
>
>> On Tue, Dec 05, 2023 at 11:36:26AM +0100, Vitaly Kuznetsov wrote:
>>> Hyper-V emulation in KVM is a fairly big chunk and in some cases it may be
>>> desirable to not compile it in to reduce module sizes as well as the attack
>>> surface. Introduce CONFIG_KVM_HYPERV option to make it possible.
>>>
>>> Note, there's room for further nVMX/nSVM code optimizations when
>>> !CONFIG_KVM_HYPERV, this will be done in follow-up patches.
>>>
>>> Reorganize Makefile a bit so all CONFIG_HYPERV and CONFIG_KVM_HYPERV files
>>> are grouped together.
>>>
>>
>> Wanted to test this for the case where KVM is running as a nested hypervisor on
>> Hyper-V but it doesn't apply cleanly - what base did you use? Tried v6.6,
>> v6.7-rc1, and v6.7-rc4.
>
> Hi Jeremi,
>
> the base was 'kvm/next' (git://git.kernel.org/pub/scm/virt/kvm/kvm.git,
> 'next' branch):
>
> commit e9e60c82fe391d04db55a91c733df4a017c28b2f (kvm/next)
> Author: Paolo Bonzini <pbonzini@redhat.com>
> Date: Tue Nov 21 11:24:08 2023 -0500
>
> selftests/kvm: fix compilation on non-x86_64 platforms
>
Hi Vitaly,
Thanks. Just tested this running in an AMD Hyper-V guest with CONFIG_KVM_HYPERV
unset, and tested nested virtualization - no regressions. You can have my tag:
Tested-by: Jeremi Piotrowski <jpiotrowski@linux.microsoft.com>
Jeremi
^ permalink raw reply [flat|nested] 25+ messages in thread
* Re: [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
` (15 preceding siblings ...)
2023-12-05 10:36 ` [PATCH v2 16/16] KVM: nSVM: hyper-v: Hide more stuff under CONFIG_KVM_HYPERV/CONFIG_HYPERV Vitaly Kuznetsov
@ 2023-12-08 2:17 ` Sean Christopherson
16 siblings, 0 replies; 25+ messages in thread
From: Sean Christopherson @ 2023-12-08 2:17 UTC (permalink / raw)
To: Sean Christopherson, kvm, Paolo Bonzini, Maxim Levitsky,
Vitaly Kuznetsov
On Tue, 05 Dec 2023 11:36:14 +0100, Vitaly Kuznetsov wrote:
> v1:
> https://lore.kernel.org/kvm/20231025152406.1879274-1-vkuznets@redhat.com/
>
> Changes since RFC:
> - "KVM: x86: hyper-v: Split off nested_evmcs_handle_vmclear()" patch added
> [Sean]
> - "KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h" patch added [Sean]
> - Use evmptr_is_set()/nested_vmx_is_evmptr12_set() helpers instead of
> nested_vmx_evmptr12() [Sean]
> - Move "#ifdef CONFIG_KVM_HYPERV" inside certain functions instead of
> adding stubs for !CONFIG_KVM_HYPERV case [Sean]
> - Minor code re-shuffling [Sean]
> - Collect R-b tags [Max]
>
> [...]
Applied to kvm-x86 hyperv. I massaged a lot of the shortlogs to adjust the
scope, shorten line lengths, and rephrase things using more conversational
language.
Re: the scopes, while I like the idea of "KVM: x86/hyper-v:", e.g. to pair with
"KVM: x86/xen:", I think we should forego it for now. The Xen code is fairly
well contained and doesn't have VMX or SVM code, let alone nVMX and nSVM code.
Hyper-V... not so much. It has its greedy little hands in everything :-) That
makes it rather difficult to have consistency and correctness, e.g. these three
are all nVMX+hyper-v specific, yet managed to end up with three different scopes.
KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h
KVM: nVMX: hyper-v: Introduce nested_vmx_evmcs() accessor
KVM: x86: hyper-v: Split off nested_evmcs_handle_vmclear()
And things only get more confusing when KVM-on-Hyper-V comes into play. So kinda
like we do with the TDP MMU, which is too intertwined with the regular/common
MMU code to get its own scope, I think we should use existing scopes and then
explicitly talk about Hyper-V in the shortlog to make up for the lack of
precision.
Please speak up if you disagree! I don't expect to apply any other patches to
this branch, i.e. further massaging the shortlogs isn't a problem.
[1/16] KVM: x86/xen: Remove unneeded xen context from kvm_arch when !CONFIG_KVM_XEN
https://github.com/kvm-x86/linux/commit/87562052c965
[2/16] KVM: x86: Move Hyper-V partition assist page out of Hyper-V emulation context
https://github.com/kvm-x86/linux/commit/cfef5af3cb0e
[3/16] KVM: VMX: Split off vmx_onhyperv.{ch} from hyperv.{ch}
https://github.com/kvm-x86/linux/commit/50a82b0eb88c
[4/16] KVM: x86: Introduce helper to check if auto-EOI is set in Hyper-V SynIC
https://github.com/kvm-x86/linux/commit/16e880bfa637
[5/16] KVM: x86: Introduce helper to check if vector is set in Hyper-V SynIC
https://github.com/kvm-x86/linux/commit/0659262a2625
[6/16] KVM: VMX: Split off hyperv_evmcs.{ch}
https://github.com/kvm-x86/linux/commit/e7ad84db4d71
[7/16] KVM: x86: Introduce helper to handle Hyper-V paravirt TLB flush requests
https://github.com/kvm-x86/linux/commit/af9d544a4521
[8/16] KVM: nVMX: Split off helper for emulating VMCLEAR on Hyper-V eVMCS
https://github.com/kvm-x86/linux/commit/b2e02f82b7f7
[9/16] KVM: selftests: Make Hyper-V tests explicitly require KVM Hyper-V support
https://github.com/kvm-x86/linux/commit/6dac1195181c
[10/16] KVM: selftests: Fix vmxon_pa == vmcs12_pa == -1ull nVMX testcase for !eVMCS
https://github.com/kvm-x86/linux/commit/225b7c1117b2
[11/16] KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h
https://github.com/kvm-x86/linux/commit/f97314626734
[12/16] KVM: x86: Make Hyper-V emulation optional
https://github.com/kvm-x86/linux/commit/b4f69df0f65e
[13/16] KVM: nVMX: Introduce helpers to check if Hyper-V evmptr12 is valid/set
https://github.com/kvm-x86/linux/commit/453e42b05571
[14/16] KVM: nVMX: Introduce accessor to get Hyper-V eVMCS pointer
https://github.com/kvm-x86/linux/commit/c98842b26c23
[15/16] KVM: nVMX: Hide more stuff under CONFIG_KVM_HYPERV
https://github.com/kvm-x86/linux/commit/5a30f97683af
[16/16] KVM: nSVM: Hide more stuff under CONFIG_KVM_HYPERV/CONFIG_HYPERV
https://github.com/kvm-x86/linux/commit/017a99a966f1
--
https://github.com/kvm-x86/linux/tree/next
^ permalink raw reply [flat|nested] 25+ messages in thread
end of thread, other threads:[~2023-12-08 2:18 UTC | newest]
Thread overview: 25+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-12-05 10:36 [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 01/16] KVM: x86: xen: Remove unneeded xen context from struct kvm_arch when !CONFIG_KVM_XEN Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 02/16] KVM: x86: hyper-v: Move Hyper-V partition assist page out of Hyper-V emulation context Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 03/16] KVM: VMX: Split off vmx_onhyperv.{ch} from hyperv.{ch} Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 04/16] KVM: x86: hyper-v: Introduce kvm_hv_synic_auto_eoi_set() Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 05/16] KVM: x86: hyper-v: Introduce kvm_hv_synic_has_vector() Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 06/16] KVM: VMX: Split off hyperv_evmcs.{ch} Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 07/16] KVM: x86: hyper-v: Introduce kvm_hv_nested_transtion_tlb_flush() helper Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 08/16] KVM: x86: hyper-v: Split off nested_evmcs_handle_vmclear() Vitaly Kuznetsov
2023-12-05 12:06 ` Maxim Levitsky
2023-12-05 10:36 ` [PATCH v2 09/16] KVM: selftests: Make all Hyper-V tests explicitly dependent on Hyper-V emulation support in KVM Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 10/16] KVM: selftests: Fix vmxon_pa == vmcs12_pa == -1ull vmx_set_nested_state_test for !eVMCS case Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 11/16] KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h Vitaly Kuznetsov
2023-12-05 12:05 ` Maxim Levitsky
2023-12-05 10:36 ` [PATCH v2 12/16] KVM: x86: Make Hyper-V emulation optional Vitaly Kuznetsov
2023-12-05 14:52 ` Maxim Levitsky
2023-12-06 11:36 ` Jeremi Piotrowski
[not found] ` <46235.123120606372000354@us-mta-490.us.mimecast.lan>
2023-12-06 12:36 ` Vitaly Kuznetsov
2023-12-07 12:06 ` Jeremi Piotrowski
2023-12-05 10:36 ` [PATCH v2 13/16] KVM: nVMX: hyper-v: Introduce nested_vmx_is_evmptr12_{valid,set}() helpers Vitaly Kuznetsov
2023-12-05 14:53 ` Maxim Levitsky
2023-12-05 10:36 ` [PATCH v2 14/16] KVM: nVMX: hyper-v: Introduce nested_vmx_evmcs() accessor Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 15/16] KVM: nVMX: hyper-v: Hide more stuff under CONFIG_KVM_HYPERV Vitaly Kuznetsov
2023-12-05 10:36 ` [PATCH v2 16/16] KVM: nSVM: hyper-v: Hide more stuff under CONFIG_KVM_HYPERV/CONFIG_HYPERV Vitaly Kuznetsov
2023-12-08 2:17 ` [PATCH v2 00/16] KVM: x86: Make Hyper-V emulation optional Sean Christopherson
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