From: Zhao Liu <zhao1.liu@linux.intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
"Rafael J . Wysocki" <rafael@kernel.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H . Peter Anvin" <hpa@zytor.com>,
kvm@vger.kernel.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org, x86@kernel.org
Cc: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>,
Len Brown <len.brown@intel.com>, Zhang Rui <rui.zhang@intel.com>,
Zhenyu Wang <zhenyu.z.wang@intel.com>,
Zhuocheng Ding <zhuocheng.ding@intel.com>,
Dapeng Mi <dapeng1.mi@intel.com>,
Yanting Jiang <yanting.jiang@intel.com>,
Yongwei Ma <yongwei.ma@intel.com>,
Vineeth Pillai <vineeth@bitbyteword.org>,
Suleiman Souhlal <suleiman@google.com>,
Masami Hiramatsu <mhiramat@google.com>,
David Dai <davidai@google.com>,
Saravana Kannan <saravanak@google.com>,
Zhao Liu <zhao1.liu@intel.com>
Subject: [RFC 04/26] KVM: Add kvm_arch_sched_out() hook
Date: Sat, 3 Feb 2024 17:11:52 +0800 [thread overview]
Message-ID: <20240203091214.411862-5-zhao1.liu@linux.intel.com> (raw)
In-Reply-To: <20240203091214.411862-1-zhao1.liu@linux.intel.com>
From: Zhao Liu <zhao1.liu@intel.com>
x86 needs to reset classification history when vCPU is scheduled out.
Add the kvm_arch_sched_out() hook to allow x86 implements its own
history reset logic at sched_out.
Tested-by: Yanting Jiang <yanting.jiang@intel.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
---
arch/arm64/include/asm/kvm_host.h | 1 +
arch/mips/include/asm/kvm_host.h | 1 +
arch/powerpc/include/asm/kvm_host.h | 1 +
arch/riscv/include/asm/kvm_host.h | 1 +
arch/s390/include/asm/kvm_host.h | 1 +
arch/x86/include/asm/kvm_host.h | 2 ++
include/linux/kvm_host.h | 1 +
virt/kvm/kvm_main.c | 1 +
8 files changed, 9 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 21c57b812569..a7898fceb761 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -1127,6 +1127,7 @@ static inline bool kvm_system_needs_idmapped_vectors(void)
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
+static inline void kvm_arch_sched_out(struct kvm_vcpu *vcpu) {}
void kvm_arm_init_debug(void);
void kvm_arm_vcpu_init_debug(struct kvm_vcpu *vcpu);
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index 179f320cc231..2bcd462db11a 100644
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -891,6 +891,7 @@ static inline void kvm_arch_free_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot) {}
static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
+static inline void kvm_arch_sched_out(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 8abac532146e..96bcf62439b2 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -898,6 +898,7 @@ static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
+static inline void kvm_arch_sched_out(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h
index 484d04a92fa6..a395a366f034 100644
--- a/arch/riscv/include/asm/kvm_host.h
+++ b/arch/riscv/include/asm/kvm_host.h
@@ -273,6 +273,7 @@ struct kvm_vcpu_arch {
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
+static inline void kvm_arch_sched_out(struct kvm_vcpu *vcpu) {}
#define KVM_RISCV_GSTAGE_TLB_MIN_ORDER 12
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index 52664105a473..6e03188d11b0 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -1045,6 +1045,7 @@ extern int kvm_s390_gisc_unregister(struct kvm *kvm, u32 gisc);
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
+static inline void kvm_arch_sched_out(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_free_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot) {}
static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index b5b2d0fde579..2be78549bec8 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -2280,6 +2280,8 @@ static inline int kvm_cpu_get_apicid(int mps_cpu)
int memslot_rmap_alloc(struct kvm_memory_slot *slot, unsigned long npages);
+static inline void kvm_arch_sched_out(struct kvm_vcpu *vcpu) {}
+
#define KVM_CLOCK_VALID_FLAGS \
(KVM_CLOCK_TSC_STABLE | KVM_CLOCK_REALTIME | KVM_CLOCK_HOST_TSC)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 7e7fd25b09b3..3aabd3813de0 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1478,6 +1478,7 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu);
void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
+void kvm_arch_sched_out(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 10bfc88a69f7..671f88dff006 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -6317,6 +6317,7 @@ static void kvm_sched_out(struct preempt_notifier *pn,
WRITE_ONCE(vcpu->ready, true);
}
kvm_arch_vcpu_put(vcpu);
+ kvm_arch_sched_out(vcpu);
__this_cpu_write(kvm_running_vcpu, NULL);
}
--
2.34.1
next prev parent reply other threads:[~2024-02-03 9:00 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-03 9:11 [RFC 00/26] Intel Thread Director Virtualization Zhao Liu
2024-02-03 9:11 ` [RFC 01/26] thermal: Add bit definition for x86 thermal related MSRs Zhao Liu
2024-02-03 9:11 ` [RFC 02/26] thermal: intel: hfi: Add helpers to build HFI/ITD structures Zhao Liu
2024-02-03 9:11 ` [RFC 03/26] thermal: intel: hfi: Add HFI notifier helpers to notify HFI update Zhao Liu
2024-02-03 9:11 ` Zhao Liu [this message]
2024-02-03 9:11 ` [RFC 05/26] KVM: x86: Reset hardware history at vCPU's sched_in/out Zhao Liu
2024-02-03 9:11 ` [RFC 06/26] KVM: VMX: Add helpers to handle the writes to MSR's R/O and R/WC0 bits Zhao Liu
2024-02-03 9:11 ` [RFC 07/26] KVM: VMX: Emulate ACPI (CPUID.0x01.edx[bit 22]) feature Zhao Liu
2024-02-03 9:11 ` [RFC 08/26] KVM: x86: Expose TM/ACC (CPUID.0x01.edx[bit 29]) feature bit to VM Zhao Liu
2024-02-03 9:11 ` [RFC 09/26] KVM: x86: cpuid: Define CPUID 0x06.eax by kvm_cpu_cap_mask() Zhao Liu
2024-02-03 9:11 ` [RFC 10/26] KVM: VMX: Emulate PTM/PTS (CPUID.0x06.eax[bit 6]) feature Zhao Liu
2024-02-03 9:11 ` [RFC 11/26] KVM: VMX: Introduce HFI description structure Zhao Liu
2024-02-03 9:12 ` [RFC 12/26] KVM: VMX: Introduce HFI table index for vCPU Zhao Liu
2024-02-03 9:12 ` [RFC 13/26] KVM: VMX: Support virtual HFI table for VM Zhao Liu
2024-02-03 9:12 ` [RFC 14/26] KVM: x86: Introduce the HFI dynamic update request and kvm_x86_ops Zhao Liu
2024-02-03 9:12 ` [RFC 15/26] KVM: VMX: Sync update of Host HFI table to Guest Zhao Liu
2024-02-03 9:12 ` [RFC 16/26] KVM: VMX: Update HFI table when vCPU migrates Zhao Liu
2024-02-03 9:12 ` [RFC 17/26] KVM: VMX: Allow to inject thermal interrupt without HFI update Zhao Liu
2024-02-03 9:12 ` [RFC 18/26] KVM: VMX: Emulate HFI related bits in package thermal MSRs Zhao Liu
2024-02-03 9:12 ` [RFC 19/26] KVM: VMX: Emulate the MSRs of HFI feature Zhao Liu
2024-02-03 9:12 ` [RFC 20/26] KVM: x86: Expose HFI feature bit and HFI info in CPUID Zhao Liu
2024-02-03 9:12 ` [RFC 21/26] KVM: VMX: Extend HFI table and MSR emulation to support ITD Zhao Liu
2024-02-03 9:12 ` [RFC 22/26] KVM: VMX: Pass through ITD classification related MSRs to Guest Zhao Liu
2024-02-03 9:12 ` [RFC 23/26] KVM: x86: Expose ITD feature bit and related info in CPUID Zhao Liu
2024-02-03 9:12 ` [RFC 24/26] KVM: VMX: Emulate the MSR of HRESET feature Zhao Liu
2024-02-03 9:12 ` [RFC 25/26] KVM: x86: Expose HRESET feature's CPUID to Guest Zhao Liu
2024-02-03 9:12 ` [RFC 26/26] Documentation: KVM: Add description of pkg_therm_lock Zhao Liu
2024-02-22 7:42 ` [RFC 00/26] Intel Thread Director Virtualization Zhao Liu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240203091214.411862-5-zhao1.liu@linux.intel.com \
--to=zhao1.liu@linux.intel.com \
--cc=bp@alien8.de \
--cc=daniel.lezcano@linaro.org \
--cc=dapeng1.mi@intel.com \
--cc=dave.hansen@linux.intel.com \
--cc=davidai@google.com \
--cc=hpa@zytor.com \
--cc=kvm@vger.kernel.org \
--cc=len.brown@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=mhiramat@google.com \
--cc=mingo@redhat.com \
--cc=pbonzini@redhat.com \
--cc=rafael@kernel.org \
--cc=ricardo.neri-calderon@linux.intel.com \
--cc=rui.zhang@intel.com \
--cc=saravanak@google.com \
--cc=seanjc@google.com \
--cc=suleiman@google.com \
--cc=tglx@linutronix.de \
--cc=vineeth@bitbyteword.org \
--cc=x86@kernel.org \
--cc=yanting.jiang@intel.com \
--cc=yongwei.ma@intel.com \
--cc=zhao1.liu@intel.com \
--cc=zhenyu.z.wang@intel.com \
--cc=zhuocheng.ding@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).