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x86/kvm/vmx: Make noinstr clean

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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>
This commit is contained in:
Peter Zijlstra 2022-06-14 23:15:32 +02:00 committed by Borislav Petkov
parent 03c765b0e3
commit 742ab6df97
3 changed files with 6 additions and 6 deletions
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6
arch/x86/kvm/vmx/vmx.c
View File

@ -383,9 +383,9 @@ static __always_inline void vmx_disable_fb_clear(struct vcpu_vmx *vmx)
if (!vmx->disable_fb_clear)
return;
rdmsrl(MSR_IA32_MCU_OPT_CTRL, msr);
msr = __rdmsr(MSR_IA32_MCU_OPT_CTRL);
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 */
vmx->msr_ia32_mcu_opt_ctrl = msr;
}
@ -396,7 +396,7 @@ static __always_inline void vmx_enable_fb_clear(struct vcpu_vmx *vmx)
return;
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)

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

@ -12631,9 +12631,9 @@ void kvm_arch_end_assignment(struct kvm *kvm)
}
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);

2
include/linux/kvm_host.h
View File

@ -1513,7 +1513,7 @@ 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;
}