From: Quentin Perret <qperret@google.com>
To: Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Fuad Tabba <tabba@google.com>,
David Brazdil <dbrazdil@google.com>
Cc: linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org,
kernel-team@android.com
Subject: [PATCH 03/16] KVM: arm64: Avoid remapping the SVE state in the hyp stage-1
Date: Wed, 13 Oct 2021 16:58:18 +0100 [thread overview]
Message-ID: <20211013155831.943476-4-qperret@google.com> (raw)
In-Reply-To: <20211013155831.943476-1-qperret@google.com>
We currently map the SVE state into the hypervisor stage-1 on VCPU_RUN,
when the vCPU thread's PID has changed. However, this only needs to be
done during the first VCPU_RUN as the SVE state doesn't depend on
thread-specific data, so move the create_hyp_mapping() call to
kvm_vcpu_first_run_init().
Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
---
arch/arm64/kvm/arm.c | 12 ++++++++++++
arch/arm64/kvm/fpsimd.c | 11 -----------
2 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index fe102cd2e518..c33d8c073820 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -618,6 +618,18 @@ static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
if (ret)
return ret;
+ if (vcpu->arch.sve_state) {
+ void *sve_end;
+
+ sve_end = vcpu->arch.sve_state + vcpu_sve_state_size(vcpu);
+
+ ret = create_hyp_mappings(vcpu->arch.sve_state, sve_end,
+ PAGE_HYP);
+ if (ret)
+ return ret;
+ }
+
+
ret = kvm_arm_pmu_v3_enable(vcpu);
return ret;
diff --git a/arch/arm64/kvm/fpsimd.c b/arch/arm64/kvm/fpsimd.c
index 5621020b28de..62c0d78da7be 100644
--- a/arch/arm64/kvm/fpsimd.c
+++ b/arch/arm64/kvm/fpsimd.c
@@ -43,17 +43,6 @@ int kvm_arch_vcpu_run_map_fp(struct kvm_vcpu *vcpu)
if (ret)
goto error;
- if (vcpu->arch.sve_state) {
- void *sve_end;
-
- sve_end = vcpu->arch.sve_state + vcpu_sve_state_size(vcpu);
-
- ret = create_hyp_mappings(vcpu->arch.sve_state, sve_end,
- PAGE_HYP);
- if (ret)
- goto error;
- }
-
vcpu->arch.host_thread_info = kern_hyp_va(ti);
vcpu->arch.host_fpsimd_state = kern_hyp_va(fpsimd);
error:
--
2.33.0.882.g93a45727a2-goog
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next prev parent reply other threads:[~2021-10-13 16:02 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-13 15:58 [PATCH 00/16] KVM: arm64: Implement unshare hypercall for pkvm Quentin Perret
2021-10-13 15:58 ` [PATCH 01/16] KVM: arm64: Introduce do_share() helper for memory sharing between components Quentin Perret
2021-10-15 15:11 ` Andrew Walbran
2021-10-19 10:37 ` Quentin Perret
2021-10-13 15:58 ` [PATCH 02/16] KVM: arm64: Implement __pkvm_host_share_hyp() using do_share() Quentin Perret
2021-10-13 15:58 ` Quentin Perret [this message]
2021-10-16 11:04 ` [PATCH 03/16] KVM: arm64: Avoid remapping the SVE state in the hyp stage-1 Marc Zyngier
2021-10-18 10:36 ` Quentin Perret
2021-10-13 15:58 ` [PATCH 04/16] KVM: arm64: Introduce kvm_share_hyp() Quentin Perret
2021-10-17 10:41 ` Marc Zyngier
2021-10-18 10:51 ` Quentin Perret
2021-10-13 15:58 ` [PATCH 05/16] KVM: arm64: Accept page ranges in pkvm share hypercall Quentin Perret
2021-10-13 15:58 ` [PATCH 06/16] KVM: arm64: Provide {get,put}_page() stubs for early hyp allocator Quentin Perret
2021-10-13 15:58 ` [PATCH 07/16] KVM: arm64: Refcount hyp stage-1 pgtable pages Quentin Perret
2021-10-13 15:58 ` [PATCH 08/16] KVM: arm64: Fixup hyp stage-1 refcount Quentin Perret
2021-10-13 15:58 ` [PATCH 09/16] KVM: arm64: Hook up ->page_count() for hypervisor stage-1 page-table Quentin Perret
2021-10-13 15:58 ` [PATCH 10/16] KVM: arm64: Implement kvm_pgtable_hyp_unmap() at EL2 Quentin Perret
2021-10-13 15:58 ` [PATCH 11/16] KVM: arm64: Back hyp_vmemmap for all of memory Quentin Perret
2021-10-13 15:58 ` [PATCH 12/16] KVM: arm64: Move hyp refcount helpers to header files Quentin Perret
2021-10-13 15:58 ` [PATCH 13/16] KVM: arm64: Move double-sharing logic into hyp-specific function Quentin Perret
2021-10-13 15:58 ` [PATCH 14/16] KVM: arm64: Refcount shared pages at EL2 Quentin Perret
2021-10-13 15:58 ` [PATCH 15/16] KVM: arm64: pkvm: Introduce an unshare hypercall Quentin Perret
2021-10-13 15:58 ` [PATCH 16/16] KVM: arm64: pkvm: Unshare guest structs during teardown Quentin Perret
2021-10-16 12:25 ` Marc Zyngier
2021-10-18 10:32 ` Quentin Perret
2021-10-18 14:03 ` Quentin Perret
2021-10-18 17:12 ` Marc Zyngier
2021-10-19 9:40 ` Quentin Perret
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