From: Andrew Scull <ascull@google.com>
To: kvmarm@lists.cs.columbia.edu
Cc: kernel-team@android.com, maz@kernel.org, catalin.marinas@arm.com,
will@kernel.org, Dave.Martin@arm.com
Subject: [PATCH 03/10] KVM: arm64: Unmap host task thread flags from hyp
Date: Thu, 4 Mar 2021 11:54:46 +0000 [thread overview]
Message-ID: <20210304115454.3597879-4-ascull@google.com> (raw)
In-Reply-To: <20210304115454.3597879-1-ascull@google.com>
Hyp no longer needs access to the host task's thread flags so remove the
corresponding hyp mapping.
Signed-off-by: Andrew Scull <ascull@google.com>
Cc: Dave Martin <Dave.Martin@arm.com>
---
arch/arm64/include/asm/kvm_host.h | 2 --
arch/arm64/kvm/fpsimd.c | 11 +----------
2 files changed, 1 insertion(+), 12 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index f6a478d3a902..8a559fa2f237 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -26,7 +26,6 @@
#include <asm/fpsimd.h>
#include <asm/kvm.h>
#include <asm/kvm_asm.h>
-#include <asm/thread_info.h>
#define __KVM_HAVE_ARCH_INTC_INITIALIZED
@@ -307,7 +306,6 @@ struct kvm_vcpu_arch {
struct kvm_guest_debug_arch vcpu_debug_state;
struct kvm_guest_debug_arch external_debug_state;
- struct thread_info *host_thread_info; /* hyp VA */
struct user_fpsimd_state *host_fpsimd_state; /* hyp VA */
struct {
diff --git a/arch/arm64/kvm/fpsimd.c b/arch/arm64/kvm/fpsimd.c
index 0c5e79be34d5..3e5a02137643 100644
--- a/arch/arm64/kvm/fpsimd.c
+++ b/arch/arm64/kvm/fpsimd.c
@@ -27,22 +27,13 @@ int kvm_arch_vcpu_run_map_fp(struct kvm_vcpu *vcpu)
{
int ret;
- struct thread_info *ti = ¤t->thread_info;
struct user_fpsimd_state *fpsimd = ¤t->thread.uw.fpsimd_state;
- /*
- * Make sure the host task thread flags and fpsimd state are
- * visible to hyp:
- */
- ret = create_hyp_mappings(ti, ti + 1, PAGE_HYP);
- if (ret)
- goto error;
-
+ /* Make sure the host task fpsimd state is visible to hyp: */
ret = create_hyp_mappings(fpsimd, fpsimd + 1, 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:
return ret;
--
2.30.1.766.gb4fecdf3b7-goog
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next prev parent reply other threads:[~2021-03-04 11:55 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-04 11:54 [PATCH 00/10] FPSIMD restore bypass and protecting Andrew Scull
2021-03-04 11:54 ` [PATCH 01/10] KVM: arm64: Leave KVM_ARM64_DEBUG_DIRTY updates to the host Andrew Scull
2021-03-04 11:54 ` [PATCH 02/10] KVM: arm64: Synchronize vcpu FPSIMD in " Andrew Scull
2021-03-04 11:54 ` Andrew Scull [this message]
2021-03-04 11:54 ` [PATCH 04/10] KVM: arm64: Support smp_processor_id() in nVHE hyp Andrew Scull
2021-03-11 10:35 ` Quentin Perret
2021-03-12 11:20 ` Andrew Scull
2021-03-12 11:27 ` Andrew Scull
2021-03-04 11:54 ` [PATCH 05/10] KVM: arm64: Track where vcpu FP state was last loaded Andrew Scull
2021-03-11 10:37 ` Quentin Perret
2021-03-11 10:40 ` Quentin Perret
2021-03-04 11:54 ` [PATCH 06/10] KVM: arm64: Avoid needlessly reloading guest FP state Andrew Scull
2021-03-04 11:54 ` [PATCH 07/10] KVM: arm64: Separate host and hyp vcpu FP flags Andrew Scull
2021-03-04 11:54 ` [PATCH 08/10] KVM: arm64: Pass the arch run struct explicitly Andrew Scull
2021-03-04 11:54 ` [PATCH 09/10] KVM: arm64: Use hyp-private run struct in protected mode Andrew Scull
2021-03-04 11:54 ` [PATCH 10/10] RFC: KVM: arm64: Manage FPSIMD state at EL2 for protected vCPUs Andrew Scull
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