From: Marc Zyngier <marc.zyngier@arm.com>
To: "Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org
Cc: Christoffer Dall <cdall@cs.columbia.edu>,
Christoffer Dall <christoffer.dall@linaro.org>,
Shunyong Yang <shunyong.yang@hxt-semitech.com>,
Julien Thierry <julien.thierry@arm.com>,
Andre Przywara <andre.przywara@arm.com>,
Will Deacon <will.deacon@arm.com>,
Shih-Wei Li <shihwei@cs.columbia.edu>,
Catalin Marinas <catalin.marinas@arm.com>,
Dave Martin <Dave.Martin@arm.com>
Subject: [PATCH 32/85] KVM: arm64: Introduce separate VHE/non-VHE sysreg save/restore functions
Date: Wed, 28 Mar 2018 13:52:01 +0100 [thread overview]
Message-ID: <20180328125254.31380-33-marc.zyngier@arm.com> (raw)
In-Reply-To: <20180328125254.31380-1-marc.zyngier@arm.com>
From: Christoffer Dall <christoffer.dall@linaro.org>
As we are about to handle system registers quite differently between VHE
and non-VHE systems. In preparation for that, we need to split some of
the handling functions between VHE and non-VHE functionality.
For now, we simply copy the non-VHE functions, but we do change the use
of static keys for VHE and non-VHE functionality now that we have
separate functions.
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm64/include/asm/kvm_hyp.h | 12 ++++++++----
arch/arm64/kvm/hyp/switch.c | 20 ++++++++++----------
arch/arm64/kvm/hyp/sysreg-sr.c | 40 ++++++++++++++++++++++++++++++++--------
3 files changed, 50 insertions(+), 22 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index aeda2a777365..23c09d9af343 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -131,10 +131,14 @@ int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu);
void __timer_enable_traps(struct kvm_vcpu *vcpu);
void __timer_disable_traps(struct kvm_vcpu *vcpu);
-void __sysreg_save_host_state(struct kvm_cpu_context *ctxt);
-void __sysreg_restore_host_state(struct kvm_cpu_context *ctxt);
-void __sysreg_save_guest_state(struct kvm_cpu_context *ctxt);
-void __sysreg_restore_guest_state(struct kvm_cpu_context *ctxt);
+void __sysreg_save_host_state_nvhe(struct kvm_cpu_context *ctxt);
+void __sysreg_restore_host_state_nvhe(struct kvm_cpu_context *ctxt);
+void __sysreg_save_guest_state_nvhe(struct kvm_cpu_context *ctxt);
+void __sysreg_restore_guest_state_nvhe(struct kvm_cpu_context *ctxt);
+void sysreg_save_host_state_vhe(struct kvm_cpu_context *ctxt);
+void sysreg_restore_host_state_vhe(struct kvm_cpu_context *ctxt);
+void sysreg_save_guest_state_vhe(struct kvm_cpu_context *ctxt);
+void sysreg_restore_guest_state_vhe(struct kvm_cpu_context *ctxt);
void __sysreg32_save_state(struct kvm_vcpu *vcpu);
void __sysreg32_restore_state(struct kvm_vcpu *vcpu);
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c
index 307f8c1fcc2f..d60d3a018882 100644
--- a/arch/arm64/kvm/hyp/switch.c
+++ b/arch/arm64/kvm/hyp/switch.c
@@ -373,7 +373,7 @@ int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu)
host_ctxt->__hyp_running_vcpu = vcpu;
guest_ctxt = &vcpu->arch.ctxt;
- __sysreg_save_host_state(host_ctxt);
+ sysreg_save_host_state_vhe(host_ctxt);
__activate_traps(vcpu);
__activate_vm(vcpu->kvm);
@@ -385,7 +385,7 @@ int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu)
* to erratum #852523 (Cortex-A57) or #853709 (Cortex-A72).
*/
__sysreg32_restore_state(vcpu);
- __sysreg_restore_guest_state(guest_ctxt);
+ sysreg_restore_guest_state_vhe(guest_ctxt);
__debug_switch_to_guest(vcpu);
do {
@@ -397,13 +397,13 @@ int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu)
fp_enabled = __fpsimd_enabled();
- __sysreg_save_guest_state(guest_ctxt);
+ sysreg_save_guest_state_vhe(guest_ctxt);
__sysreg32_save_state(vcpu);
__vgic_save_state(vcpu);
__deactivate_traps(vcpu);
- __sysreg_restore_host_state(host_ctxt);
+ sysreg_restore_host_state_vhe(host_ctxt);
if (fp_enabled) {
__fpsimd_save_state(&guest_ctxt->gp_regs.fp_regs);
@@ -433,7 +433,7 @@ int __hyp_text __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu)
host_ctxt->__hyp_running_vcpu = vcpu;
guest_ctxt = &vcpu->arch.ctxt;
- __sysreg_save_host_state(host_ctxt);
+ __sysreg_save_host_state_nvhe(host_ctxt);
__activate_traps(vcpu);
__activate_vm(kern_hyp_va(vcpu->kvm));
@@ -446,7 +446,7 @@ int __hyp_text __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu)
* to erratum #852523 (Cortex-A57) or #853709 (Cortex-A72).
*/
__sysreg32_restore_state(vcpu);
- __sysreg_restore_guest_state(guest_ctxt);
+ __sysreg_restore_guest_state_nvhe(guest_ctxt);
__debug_switch_to_guest(vcpu);
do {
@@ -468,7 +468,7 @@ int __hyp_text __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu)
fp_enabled = __fpsimd_enabled();
- __sysreg_save_guest_state(guest_ctxt);
+ __sysreg_save_guest_state_nvhe(guest_ctxt);
__sysreg32_save_state(vcpu);
__timer_disable_traps(vcpu);
__vgic_save_state(vcpu);
@@ -476,7 +476,7 @@ int __hyp_text __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu)
__deactivate_traps(vcpu);
__deactivate_vm(vcpu);
- __sysreg_restore_host_state(host_ctxt);
+ __sysreg_restore_host_state_nvhe(host_ctxt);
if (fp_enabled) {
__fpsimd_save_state(&guest_ctxt->gp_regs.fp_regs);
@@ -506,7 +506,7 @@ static void __hyp_text __hyp_call_panic_nvhe(u64 spsr, u64 elr, u64 par,
__timer_disable_traps(vcpu);
__deactivate_traps(vcpu);
__deactivate_vm(vcpu);
- __sysreg_restore_host_state(__host_ctxt);
+ __sysreg_restore_host_state_nvhe(__host_ctxt);
}
/*
@@ -529,7 +529,7 @@ static void __hyp_call_panic_vhe(u64 spsr, u64 elr, u64 par,
vcpu = host_ctxt->__hyp_running_vcpu;
__deactivate_traps(vcpu);
- __sysreg_restore_host_state(host_ctxt);
+ sysreg_restore_host_state_vhe(host_ctxt);
panic(__hyp_panic_string,
spsr, elr,
diff --git a/arch/arm64/kvm/hyp/sysreg-sr.c b/arch/arm64/kvm/hyp/sysreg-sr.c
index 51b557226170..18801ab56e8b 100644
--- a/arch/arm64/kvm/hyp/sysreg-sr.c
+++ b/arch/arm64/kvm/hyp/sysreg-sr.c
@@ -78,15 +78,27 @@ static void __hyp_text __sysreg_save_el1_state(struct kvm_cpu_context *ctxt)
ctxt->sys_regs[DISR_EL1] = read_sysreg_s(SYS_VDISR_EL2);
}
-void __hyp_text __sysreg_save_host_state(struct kvm_cpu_context *ctxt)
+void __hyp_text __sysreg_save_host_state_nvhe(struct kvm_cpu_context *ctxt)
+{
+ __sysreg_save_el1_state(ctxt);
+ __sysreg_save_common_state(ctxt);
+ __sysreg_save_user_state(ctxt);
+}
+
+void __hyp_text __sysreg_save_guest_state_nvhe(struct kvm_cpu_context *ctxt)
+{
+ __sysreg_save_el1_state(ctxt);
+ __sysreg_save_common_state(ctxt);
+ __sysreg_save_user_state(ctxt);
+}
+
+void sysreg_save_host_state_vhe(struct kvm_cpu_context *ctxt)
{
- if (!has_vhe())
- __sysreg_save_el1_state(ctxt);
__sysreg_save_common_state(ctxt);
__sysreg_save_user_state(ctxt);
}
-void __hyp_text __sysreg_save_guest_state(struct kvm_cpu_context *ctxt)
+void sysreg_save_guest_state_vhe(struct kvm_cpu_context *ctxt)
{
__sysreg_save_el1_state(ctxt);
__sysreg_save_common_state(ctxt);
@@ -142,15 +154,27 @@ static void __hyp_text __sysreg_restore_el1_state(struct kvm_cpu_context *ctxt)
write_sysreg_s(ctxt->sys_regs[DISR_EL1], SYS_VDISR_EL2);
}
-void __hyp_text __sysreg_restore_host_state(struct kvm_cpu_context *ctxt)
+void __hyp_text __sysreg_restore_host_state_nvhe(struct kvm_cpu_context *ctxt)
+{
+ __sysreg_restore_el1_state(ctxt);
+ __sysreg_restore_common_state(ctxt);
+ __sysreg_restore_user_state(ctxt);
+}
+
+void __hyp_text __sysreg_restore_guest_state_nvhe(struct kvm_cpu_context *ctxt)
+{
+ __sysreg_restore_el1_state(ctxt);
+ __sysreg_restore_common_state(ctxt);
+ __sysreg_restore_user_state(ctxt);
+}
+
+void sysreg_restore_host_state_vhe(struct kvm_cpu_context *ctxt)
{
- if (!has_vhe())
- __sysreg_restore_el1_state(ctxt);
__sysreg_restore_common_state(ctxt);
__sysreg_restore_user_state(ctxt);
}
-void __hyp_text __sysreg_restore_guest_state(struct kvm_cpu_context *ctxt)
+void sysreg_restore_guest_state_vhe(struct kvm_cpu_context *ctxt)
{
__sysreg_restore_el1_state(ctxt);
__sysreg_restore_common_state(ctxt);
--
2.14.2
next prev parent reply other threads:[~2018-03-28 12:52 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-28 12:51 [GIT PULL] KVM/ARM updates for v4.17 Marc Zyngier
2018-03-28 12:51 ` [PATCH 01/85] KVM: arm/arm64: Fix arch timers with userspace irqchips Marc Zyngier
2018-03-28 12:51 ` [PATCH 02/85] ARM: kvm: fix building with gcc-8 Marc Zyngier
2018-03-28 12:51 ` [PATCH 03/85] arm64/kvm: Prohibit guest LOR accesses Marc Zyngier
2018-03-28 12:51 ` [PATCH 04/85] arm64: KVM: Move CPU ID reg trap setup off the world switch path Marc Zyngier
2018-03-28 12:51 ` [PATCH 05/85] KVM: arm64: Enable the EL1 physical timer for AArch32 guests Marc Zyngier
2018-03-28 12:51 ` [PATCH 06/85] KVM: arm: Enable emulation of the physical timer Marc Zyngier
2018-03-28 12:51 ` [PATCH 07/85] KVM: arm/arm64: No need to zero CNTVOFF in kvm_timer_vcpu_put() for VHE Marc Zyngier
2018-03-28 12:51 ` [PATCH 08/85] KVM: arm/arm64: vgic: Add missing irq_lock to vgic_mmio_read_pending Marc Zyngier
2018-03-28 12:51 ` [PATCH 09/85] KVM: arm/arm64: Avoid vcpu_load for other vcpu ioctls than KVM_RUN Marc Zyngier
2018-03-28 12:51 ` [PATCH 10/85] KVM: arm/arm64: Reset mapped IRQs on VM reset Marc Zyngier
2018-03-28 12:51 ` [PATCH 11/85] KVM: arm/arm64: Reduce verbosity of KVM init log Marc Zyngier
2018-03-28 12:51 ` [PATCH 12/85] KVM: arm/arm64: vgic: Don't populate multiple LRs with the same vintid Marc Zyngier
2018-03-28 12:51 ` [PATCH 13/85] kvm: arm/arm64: vgic-v3: Tighten synchronization for guests using v2 on v3 Marc Zyngier
2018-03-28 12:51 ` [PATCH 14/85] KVM: arm/arm64: Avoid vcpu_load for other vcpu ioctls than KVM_RUN Marc Zyngier
2018-03-28 12:51 ` [PATCH 15/85] KVM: arm/arm64: Move vcpu_load call after kvm_vcpu_first_run_init Marc Zyngier
2018-03-28 12:51 ` [PATCH 16/85] KVM: arm64: Avoid storing the vcpu pointer on the stack Marc Zyngier
2018-03-28 12:51 ` [PATCH 17/85] KVM: arm64: Rework hyp_panic for VHE and non-VHE Marc Zyngier
2018-03-28 12:51 ` [PATCH 18/85] KVM: arm64: Move HCR_INT_OVERRIDE to default HCR_EL2 guest flag Marc Zyngier
2018-03-28 12:51 ` [PATCH 19/85] KVM: arm/arm64: Get rid of vcpu->arch.irq_lines Marc Zyngier
2018-03-28 12:51 ` [PATCH 20/85] KVM: arm/arm64: Add kvm_vcpu_load_sysregs and kvm_vcpu_put_sysregs Marc Zyngier
2018-03-28 12:51 ` [PATCH 21/85] KVM: arm/arm64: Introduce vcpu_el1_is_32bit Marc Zyngier
2018-03-28 12:51 ` [PATCH 22/85] KVM: arm64: Move debug dirty flag calculation out of world switch Marc Zyngier
2018-03-28 12:51 ` [PATCH 23/85] KVM: arm64: Slightly improve debug save/restore functions Marc Zyngier
2018-03-28 12:51 ` [PATCH 24/85] KVM: arm64: Improve debug register save/restore flow Marc Zyngier
2018-03-28 12:51 ` [PATCH 25/85] KVM: arm64: Factor out fault info population and gic workarounds Marc Zyngier
2018-03-28 12:51 ` [PATCH 26/85] KVM: arm64: Introduce VHE-specific kvm_vcpu_run Marc Zyngier
2018-03-28 12:51 ` [PATCH 27/85] KVM: arm64: Remove kern_hyp_va() use in VHE switch function Marc Zyngier
2018-03-28 12:51 ` [PATCH 28/85] KVM: arm64: Don't deactivate VM on VHE systems Marc Zyngier
2018-03-28 12:51 ` [PATCH 29/85] KVM: arm64: Remove noop calls to timer save/restore from VHE switch Marc Zyngier
2018-03-28 12:51 ` [PATCH 30/85] KVM: arm64: Move userspace system registers into separate function Marc Zyngier
2018-03-28 12:52 ` [PATCH 31/85] KVM: arm64: Rewrite sysreg alternatives to static keys Marc Zyngier
2018-03-28 12:52 ` Marc Zyngier [this message]
2018-03-28 12:52 ` [PATCH 33/85] KVM: arm/arm64: Remove leftover comment from kvm_vcpu_run_vhe Marc Zyngier
2018-03-28 12:52 ` [PATCH 34/85] KVM: arm64: Unify non-VHE host/guest sysreg save and restore functions Marc Zyngier
2018-03-28 12:52 ` [PATCH 35/85] KVM: arm64: Don't save the host ELR_EL2 and SPSR_EL2 on VHE systems Marc Zyngier
2018-03-28 12:52 ` [PATCH 36/85] KVM: arm64: Change 32-bit handling of VM system registers Marc Zyngier
2018-03-28 12:52 ` [PATCH 37/85] KVM: arm64: Rewrite system register accessors to read/write functions Marc Zyngier
2018-03-28 12:52 ` [PATCH 38/85] KVM: arm64: Introduce framework for accessing deferred sysregs Marc Zyngier
2018-03-28 12:52 ` [PATCH 39/85] KVM: arm/arm64: Prepare to handle deferred save/restore of SPSR_EL1 Marc Zyngier
2018-03-28 12:52 ` [PATCH 40/85] KVM: arm64: Prepare to handle deferred save/restore of ELR_EL1 Marc Zyngier
2018-03-28 12:52 ` [PATCH 41/85] KVM: arm64: Defer saving/restoring 64-bit sysregs to vcpu load/put on VHE Marc Zyngier
2018-03-28 12:52 ` [PATCH 42/85] KVM: arm64: Prepare to handle deferred save/restore of 32-bit registers Marc Zyngier
2018-03-28 12:52 ` [PATCH 43/85] KVM: arm64: Defer saving/restoring 32-bit sysregs to vcpu load/put Marc Zyngier
2018-03-28 12:52 ` [PATCH 44/85] KVM: arm64: Move common VHE/non-VHE trap config in separate functions Marc Zyngier
2018-03-28 12:52 ` [PATCH 45/85] KVM: arm64: Directly call VHE and non-VHE FPSIMD enabled functions Marc Zyngier
2018-03-28 12:52 ` [PATCH 46/85] KVM: arm64: Configure c15, PMU, and debug register traps on cpu load/put for VHE Marc Zyngier
2018-03-28 12:52 ` [PATCH 47/85] KVM: arm64: Cleanup __activate_traps and __deactive_traps for VHE and non-VHE Marc Zyngier
2018-03-28 12:52 ` [PATCH 48/85] KVM: arm/arm64: Get rid of vgic_elrsr Marc Zyngier
2018-03-28 12:52 ` [PATCH 49/85] KVM: arm/arm64: Handle VGICv2 save/restore from the main VGIC code Marc Zyngier
2018-03-28 12:52 ` [PATCH 50/85] KVM: arm/arm64: Move arm64-only vgic-v2-sr.c file to arm64 Marc Zyngier
2018-03-28 12:52 ` [PATCH 51/85] KVM: arm/arm64: Handle VGICv3 save/restore from the main VGIC code on VHE Marc Zyngier
2018-03-28 12:52 ` [PATCH 52/85] KVM: arm/arm64: Move VGIC APR save/restore to vgic put/load Marc Zyngier
2018-03-28 12:52 ` [PATCH 53/85] KVM: arm/arm64: Avoid VGICv3 save/restore on VHE with no IRQs Marc Zyngier
2018-03-28 12:52 ` [PATCH 54/85] arm64: alternatives: Add dynamic patching feature Marc Zyngier
2018-03-28 12:52 ` [PATCH 55/85] arm64: insn: Add N immediate encoding Marc Zyngier
2018-03-28 12:52 ` [PATCH 56/85] arm64: insn: Add encoder for bitwise operations using literals Marc Zyngier
2018-03-28 12:52 ` [PATCH 57/85] arm64: KVM: Dynamically patch the kernel/hyp VA mask Marc Zyngier
2018-03-28 12:52 ` [PATCH 58/85] arm64: cpufeatures: Drop the ARM64_HYP_OFFSET_LOW feature flag Marc Zyngier
2018-03-28 12:52 ` [PATCH 59/85] KVM: arm/arm64: Do not use kern_hyp_va() with kvm_vgic_global_state Marc Zyngier
2018-03-28 12:52 ` [PATCH 60/85] KVM: arm/arm64: Demote HYP VA range display to being a debug feature Marc Zyngier
2018-03-28 12:52 ` [PATCH 61/85] KVM: arm/arm64: Move ioremap calls to create_hyp_io_mappings Marc Zyngier
2018-03-28 12:52 ` [PATCH 62/85] KVM: arm/arm64: Keep GICv2 HYP VAs in kvm_vgic_global_state Marc Zyngier
2018-03-28 12:52 ` [PATCH 63/85] KVM: arm/arm64: Fix idmap size and alignment Marc Zyngier
2018-03-28 12:52 ` [PATCH 64/85] KVM: arm64: Fix HYP idmap unmap when using 52bit PA Marc Zyngier
2018-03-28 12:52 ` [PATCH 65/85] KVM: arm/arm64: Move HYP IO VAs to the "idmap" range Marc Zyngier
2018-03-28 12:52 ` [PATCH 66/85] arm64; insn: Add encoder for the EXTR instruction Marc Zyngier
2018-03-28 12:52 ` [PATCH 67/85] arm64: insn: Allow ADD/SUB (immediate) with LSL #12 Marc Zyngier
2018-03-28 12:52 ` [PATCH 68/85] arm64: KVM: Dynamically compute the HYP VA mask Marc Zyngier
2018-03-28 12:52 ` [PATCH 69/85] arm64: KVM: Introduce EL2 VA randomisation Marc Zyngier
2018-03-28 12:52 ` [PATCH 70/85] arm64: Update the KVM memory map documentation Marc Zyngier
2018-03-28 12:52 ` [PATCH 71/85] arm64: KVM: Move vector offsetting from hyp-init.S to kvm_get_hyp_vector Marc Zyngier
2018-03-28 12:52 ` [PATCH 72/85] arm64: KVM: Move stashing of x0/x1 into the vector code itself Marc Zyngier
2018-03-28 12:52 ` [PATCH 73/85] arm64: KVM: Move BP hardening vectors into .hyp.text section Marc Zyngier
2018-03-28 12:52 ` [PATCH 74/85] arm64: KVM: Reserve 4 additional instructions in the BPI template Marc Zyngier
2018-03-28 12:52 ` [PATCH 75/85] arm64: KVM: Allow far branches from vector slots to the main vectors Marc Zyngier
2018-03-28 12:52 ` [PATCH 76/85] arm/arm64: KVM: Introduce EL2-specific executable mappings Marc Zyngier
2018-03-28 12:52 ` [PATCH 77/85] arm64: Make BP hardening slot counter available Marc Zyngier
2018-03-28 12:52 ` [PATCH 78/85] arm64: KVM: Allow mapping of vectors outside of the RAM region Marc Zyngier
2018-03-28 12:52 ` [PATCH 79/85] arm64: Enable ARM64_HARDEN_EL2_VECTORS on Cortex-A57 and A72 Marc Zyngier
2018-03-28 12:52 ` [PATCH 80/85] KVM: arm: Reserve bit in KVM_REG_ARM encoding for secure/nonsecure Marc Zyngier
2018-03-28 12:52 ` [PATCH 81/85] arm64: KVM: Use SMCCC_ARCH_WORKAROUND_1 for Falkor BP hardening Marc Zyngier
2018-03-28 12:52 ` [PATCH 82/85] KVM: arm/arm64: vgic: Disallow Active+Pending for level interrupts Marc Zyngier
2018-03-28 12:52 ` [PATCH 83/85] KVM: arm/arm64: vgic-its: Fix potential overrun in vgic_copy_lpi_list Marc Zyngier
2018-03-28 12:52 ` [PATCH 84/85] Revert "arm64: KVM: Use SMCCC_ARCH_WORKAROUND_1 for Falkor BP hardening" Marc Zyngier
2018-03-28 12:52 ` [PATCH 85/85] arm64: Add temporary ERRATA_MIDR_ALL_VERSIONS compatibility macro Marc Zyngier
2018-03-28 20:00 ` [GIT PULL] KVM/ARM updates for v4.17 Radim Krčmář
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