Commit c823dd5c authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
Browse files

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: default avatarSean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 5e0781df

arch/x86/kvm/vmx/vmx.c

+27 −32
Original line number Diff line number Diff line
@@ -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

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