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KVM: VMX: Simplify saving guest rcx in vmx_vcpu_run 

Change

  push top-of-stack
  pop guest-rcx
  pop dummy

to

  pop guest-rcx

which is the same thing, only simpler.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Avi Kivity 2011-01-06 18:09:11 +02:00 committed by Marcelo Tosatti
parent 00c25bce02
commit 1c696d0e1b
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kvm/vmx.c
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@ -4066,7 +4066,7 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu)
"xchg %0, (%%"R"sp) \n\t"
"mov %%"R"ax, %c[rax](%0) \n\t"
"mov %%"R"bx, %c[rbx](%0) \n\t"
"push"Q" (%%"R"sp); pop"Q" %c[rcx](%0) \n\t"
"pop"Q" %c[rcx](%0) \n\t"
"mov %%"R"dx, %c[rdx](%0) \n\t"
"mov %%"R"si, %c[rsi](%0) \n\t"
"mov %%"R"di, %c[rdi](%0) \n\t"
@ -4084,7 +4084,7 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu)
"mov %%cr2, %%"R"ax \n\t"
"mov %%"R"ax, %c[cr2](%0) \n\t"
"pop %%"R"bp; pop %%"R"bp; pop %%"R"dx \n\t"
"pop %%"R"bp; pop %%"R"dx \n\t"
"setbe %c[fail](%0) \n\t"
: : "c"(vmx), "d"((unsigned long)HOST_RSP),
[launched]"i"(offsetof(struct vcpu_vmx, launched)),