From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: jmattson@google.com, seanjc@google.com, jpoimboe@kernel.org
Subject: [PATCH 7/7] x86, KVM: remove unnecessary argument to x86_virt_spec_ctrl and callers
Date: Fri, 28 Oct 2022 19:07:23 -0400 [thread overview]
Message-ID: <20221028230723.3254250-8-pbonzini@redhat.com> (raw)
In-Reply-To: <20221028230723.3254250-1-pbonzini@redhat.com>
x86_virt_spec_ctrl only deals with the paravirtualized
MSR_IA32_VIRT_SPEC_CTRL now and does not handle MSR_IA32_SPEC_CTRL
anymore; remove the corresponding, unused argument.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/include/asm/spec-ctrl.h | 10 +++++-----
arch/x86/kernel/cpu/bugs.c | 2 +-
arch/x86/kvm/svm/svm.c | 4 ++--
3 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/x86/include/asm/spec-ctrl.h b/arch/x86/include/asm/spec-ctrl.h
index 5393babc0598..cb0386fc4dc3 100644
--- a/arch/x86/include/asm/spec-ctrl.h
+++ b/arch/x86/include/asm/spec-ctrl.h
@@ -13,7 +13,7 @@
* Takes the guest view of SPEC_CTRL MSR as a parameter and also
* the guest's version of VIRT_SPEC_CTRL, if emulated.
*/
-extern void x86_virt_spec_ctrl(u64 guest_spec_ctrl, u64 guest_virt_spec_ctrl, bool guest);
+extern void x86_virt_spec_ctrl(u64 guest_virt_spec_ctrl, bool guest);
/**
* x86_spec_ctrl_set_guest - Set speculation control registers for the guest
@@ -24,9 +24,9 @@ extern void x86_virt_spec_ctrl(u64 guest_spec_ctrl, u64 guest_virt_spec_ctrl, bo
* Avoids writing to the MSR if the content/bits are the same
*/
static inline
-void x86_spec_ctrl_set_guest(u64 guest_spec_ctrl, u64 guest_virt_spec_ctrl)
+void x86_spec_ctrl_set_guest(u64 guest_virt_spec_ctrl)
{
- x86_virt_spec_ctrl(guest_spec_ctrl, guest_virt_spec_ctrl, true);
+ x86_virt_spec_ctrl(guest_virt_spec_ctrl, true);
}
/**
@@ -38,9 +38,9 @@ void x86_spec_ctrl_set_guest(u64 guest_spec_ctrl, u64 guest_virt_spec_ctrl)
* Avoids writing to the MSR if the content/bits are the same
*/
static inline
-void x86_spec_ctrl_restore_host(u64 guest_spec_ctrl, u64 guest_virt_spec_ctrl)
+void x86_spec_ctrl_restore_host(u64 guest_virt_spec_ctrl)
{
- x86_virt_spec_ctrl(guest_spec_ctrl, guest_virt_spec_ctrl, false);
+ x86_virt_spec_ctrl(guest_virt_spec_ctrl, false);
}
/* AMD specific Speculative Store Bypass MSR data */
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 6ec0b7ce7453..3e3230cccaa7 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -200,7 +200,7 @@ void __init check_bugs(void)
* MSR_IA32_SPEC_CTRL for SSBD.
*/
void
-x86_virt_spec_ctrl(u64 guest_spec_ctrl, u64 guest_virt_spec_ctrl, bool setguest)
+x86_virt_spec_ctrl(u64 guest_virt_spec_ctrl, bool setguest)
{
u64 guestval, hostval;
struct thread_info *ti = current_thread_info();
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index a79cdeebc181..7b87a4e43708 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -4011,7 +4011,7 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
* being speculatively taken.
*/
if (!static_cpu_has(X86_FEATURE_V_SPEC_CTRL))
- x86_spec_ctrl_set_guest(svm->spec_ctrl, svm->virt_spec_ctrl);
+ x86_spec_ctrl_set_guest(svm->virt_spec_ctrl);
svm_vcpu_enter_exit(vcpu);
@@ -4019,7 +4019,7 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
reload_tss(vcpu);
if (!static_cpu_has(X86_FEATURE_V_SPEC_CTRL))
- x86_spec_ctrl_restore_host(svm->spec_ctrl, svm->virt_spec_ctrl);
+ x86_spec_ctrl_restore_host(svm->virt_spec_ctrl);
if (!sev_es_guest(vcpu->kvm)) {
vcpu->arch.cr2 = svm->vmcb->save.cr2;
--
2.31.1
prev parent reply other threads:[~2022-10-28 23:10 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-28 23:07 [RFC PATCH 0/7] KVM: SVM: move MSR_IA32_SPEC_CTRL save/restore to assembly Paolo Bonzini
2022-10-28 23:07 ` [PATCH 1/7] KVM: VMX: remove regs argument of __vmx_vcpu_run Paolo Bonzini
2022-10-31 17:37 ` Sean Christopherson
2022-11-01 17:32 ` Josh Poimboeuf
2022-11-01 18:03 ` Sean Christopherson
2022-11-02 17:42 ` Paolo Bonzini
2022-10-28 23:07 ` [PATCH 2/7] KVM: VMX: more cleanups to __vmx_vcpu_run Paolo Bonzini
2022-10-28 23:07 ` [PATCH 3/7] KVM: SVM: extract VMCB accessors to a new file Paolo Bonzini
2022-10-28 23:07 ` [PATCH 4/7] KVM: SVM: replace argument of __svm_vcpu_run with vcpu_svm Paolo Bonzini
2022-10-29 22:10 ` kernel test robot
2022-10-28 23:07 ` [PATCH 5/7] KVM: SVM: adjust register allocation for __svm_vcpu_run Paolo Bonzini
2022-10-28 23:07 ` [PATCH 6/7] KVM: SVM: move MSR_IA32_SPEC_CTRL save/restore to assembly Paolo Bonzini
2022-10-30 8:36 ` kernel test robot
2022-11-02 15:28 ` Josh Poimboeuf
2022-11-02 16:02 ` Paolo Bonzini
2022-10-28 23:07 ` Paolo Bonzini [this message]
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