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x86/kvm/vmx: Make noinstr clean

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commit 742ab6df97 upstream.

The recent mmio_stale_data fixes broke the noinstr constraints:

  vmlinux.o: warning: objtool: vmx_vcpu_enter_exit+0x15b: call to wrmsrl.constprop.0() leaves .noinstr.text section
  vmlinux.o: warning: objtool: vmx_vcpu_enter_exit+0x1bf: call to kvm_arch_has_assigned_device() leaves .noinstr.text section

make it all happy again.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Zijlstra 2022-06-14 23:15:32 +02:00 committed by Greg Kroah-Hartman
parent accb8cfd50
commit 7070bbb66c
3 changed files with 6 additions and 6 deletions
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6
arch/x86/kvm/vmx/vmx.c
View File

@ -380,9 +380,9 @@ static __always_inline void vmx_disable_fb_clear(struct vcpu_vmx *vmx)
if (!vmx->disable_fb_clear) if (!vmx->disable_fb_clear)
return; return;
rdmsrl(MSR_IA32_MCU_OPT_CTRL, msr); msr = __rdmsr(MSR_IA32_MCU_OPT_CTRL);
msr |= FB_CLEAR_DIS; msr |= FB_CLEAR_DIS;
wrmsrl(MSR_IA32_MCU_OPT_CTRL, msr); native_wrmsrl(MSR_IA32_MCU_OPT_CTRL, msr);
/* Cache the MSR value to avoid reading it later */ /* Cache the MSR value to avoid reading it later */
vmx->msr_ia32_mcu_opt_ctrl = msr; vmx->msr_ia32_mcu_opt_ctrl = msr;
} }
@ -393,7 +393,7 @@ static __always_inline void vmx_enable_fb_clear(struct vcpu_vmx *vmx)
return; return;
vmx->msr_ia32_mcu_opt_ctrl &= ~FB_CLEAR_DIS; vmx->msr_ia32_mcu_opt_ctrl &= ~FB_CLEAR_DIS;
wrmsrl(MSR_IA32_MCU_OPT_CTRL, vmx->msr_ia32_mcu_opt_ctrl); native_wrmsrl(MSR_IA32_MCU_OPT_CTRL, vmx->msr_ia32_mcu_opt_ctrl);
} }
static void vmx_update_fb_clear_dis(struct kvm_vcpu *vcpu, struct vcpu_vmx *vmx) static void vmx_update_fb_clear_dis(struct kvm_vcpu *vcpu, struct vcpu_vmx *vmx)

4
arch/x86/kvm/x86.c
View File

@ -11173,9 +11173,9 @@ void kvm_arch_end_assignment(struct kvm *kvm)
} }
EXPORT_SYMBOL_GPL(kvm_arch_end_assignment); EXPORT_SYMBOL_GPL(kvm_arch_end_assignment);
bool kvm_arch_has_assigned_device(struct kvm *kvm) bool noinstr kvm_arch_has_assigned_device(struct kvm *kvm)
{ {
return atomic_read(&kvm->arch.assigned_device_count); return arch_atomic_read(&kvm->arch.assigned_device_count);
} }
EXPORT_SYMBOL_GPL(kvm_arch_has_assigned_device); EXPORT_SYMBOL_GPL(kvm_arch_has_assigned_device);

2
include/linux/kvm_host.h
View File

@ -988,7 +988,7 @@ static inline void kvm_arch_end_assignment(struct kvm *kvm)
{ {
} }
static inline bool kvm_arch_has_assigned_device(struct kvm *kvm) static __always_inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
{ {
return false; return false;
} }