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x86/kvm/VMX: drop bad asm() clobber from nested_vmx_check_vmentry_hw()

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While upstream gcc doesn't detect conflicts on cc (yet), it really
should, and hence "cc" should not be specified for asm()-s also having
"=@cc<cond>" outputs. (It is quite pointless anyway to specify a "cc"
clobber in x86 inline assembly, since the compiler assumes it to be
always clobbered, and has no means [yet] to suppress this behavior.)

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Fixes: bbc0b82392 ("KVM: nVMX: Capture VM-Fail via CC_{SET,OUT} in nested early checks")
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jan Beulich 2019-05-27 02:45:44 -06:00 committed by Paolo Bonzini
parent fb89f4ea7f
commit 5a253552a5
1 changed files with 1 additions and 1 deletions
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arch/x86/kvm/vmx/nested.c
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@ -2781,7 +2781,7 @@ static int nested_vmx_check_vmentry_hw(struct kvm_vcpu *vcpu)
[launched]"i"(offsetof(struct loaded_vmcs, launched)),
[host_state_rsp]"i"(offsetof(struct loaded_vmcs, host_state.rsp)),
[wordsize]"i"(sizeof(ulong))
: "cc", "memory"
: "memory"
);
if (vmx->msr_autoload.host.nr)