OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

KVM: VMX: Fold __vmx_vcpu_run() back into vmx_vcpu_run() 

...now that the code is no longer tagged with STACK_FRAME_NON_STANDARD.
Arguably, providing __vmx_vcpu_run() to break up vmx_vcpu_run() is
valuable on its own, but the previous split was purposely made as small
as possible to limit the effects STACK_FRAME_NON_STANDARD.  In other
words, the current split is now completely arbitrary and likely not the
most logical.

This also allows renaming ____vmx_vcpu_run() to __vmx_vcpu_run() in a
future patch.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2019-01-25 07:41:13 -08:00 committed by Paolo Bonzini
parent 5e0781df18
commit c823dd5c0f
1 changed files with 27 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
arch/x86/kvm/vmx/vmx.c
View File

@ -6371,37 +6371,6 @@ void vmx_update_host_rsp(struct vcpu_vmx *vmx, unsigned long host_rsp)
}
}
static void __vmx_vcpu_run(struct kvm_vcpu *vcpu, struct vcpu_vmx *vmx)
{
if (static_branch_unlikely(&vmx_l1d_should_flush))
vmx_l1d_flush(vcpu);
if (vcpu->arch.cr2 != read_cr2())
write_cr2(vcpu->arch.cr2);
asm(
"call ____vmx_vcpu_run \n\t"
: ASM_CALL_CONSTRAINT, "=b"(vmx->fail),
#ifdef CONFIG_X86_64
"=D"((int){0}), "=S"((int){0})
: "D"(vmx), "S"(&vcpu->arch.regs),
#else
"=a"((int){0}), "=d"((int){0})
: "a"(vmx), "d"(&vcpu->arch.regs),
#endif
"b"(vmx->loaded_vmcs->launched)
: "cc", "memory"
#ifdef CONFIG_X86_64
, "rax", "rcx", "rdx"
, "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
#else
, "ecx", "edi", "esi"
#endif
);
vcpu->arch.cr2 = read_cr2();
}
static void vmx_vcpu_run(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
@ -6469,7 +6438,33 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu)
*/
x86_spec_ctrl_set_guest(vmx->spec_ctrl, 0);
__vmx_vcpu_run(vcpu, vmx);
if (static_branch_unlikely(&vmx_l1d_should_flush))
vmx_l1d_flush(vcpu);
if (vcpu->arch.cr2 != read_cr2())
write_cr2(vcpu->arch.cr2);
asm(
"call ____vmx_vcpu_run \n\t"
: ASM_CALL_CONSTRAINT, "=b"(vmx->fail),
#ifdef CONFIG_X86_64
"=D"((int){0}), "=S"((int){0})
: "D"(vmx), "S"(&vcpu->arch.regs),
#else
"=a"((int){0}), "=d"((int){0})
: "a"(vmx), "d"(&vcpu->arch.regs),
#endif
"b"(vmx->loaded_vmcs->launched)
: "cc", "memory"
#ifdef CONFIG_X86_64
, "rax", "rcx", "rdx"
, "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
#else
, "ecx", "edi", "esi"
#endif
);
vcpu->arch.cr2 = read_cr2();
/*
* We do not use IBRS in the kernel. If this vCPU has used the