Improve handle_external_interrupt_irqoff inline assembly in several ways: - use "rme" operand constraint instead of "i" and remove unneeded %c operand modifiers and "$" prefixes - use %rsp instead of _ASM_SP, since we are in CONFIG_X86_64 part - use $-16 immediate to align %rsp - remove unneeded use of __ASM_SIZE macro - define "ss" named operand only for X86_64 The patch introduces no functional changes. Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> Cc: Sean Christopherson <sean.j.christopherson@xxxxxxxxx> Signed-off-by: Uros Bizjak <ubizjak@xxxxxxxxx> --- arch/x86/kvm/vmx/vmx.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index c2c6335a998c..8354023c1157 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -6283,13 +6283,13 @@ static void handle_external_interrupt_irqoff(struct kvm_vcpu *vcpu) asm volatile( #ifdef CONFIG_X86_64 - "mov %%" _ASM_SP ", %[sp]\n\t" - "and $0xfffffffffffffff0, %%" _ASM_SP "\n\t" - "push $%c[ss]\n\t" + "mov %%rsp, %[sp]\n\t" + "and $-16, %%rsp\n\t" + "push %[ss]\n\t" "push %[sp]\n\t" #endif "pushf\n\t" - __ASM_SIZE(push) " $%c[cs]\n\t" + "push %[cs]\n\t" CALL_NOSPEC : #ifdef CONFIG_X86_64 @@ -6298,8 +6298,10 @@ static void handle_external_interrupt_irqoff(struct kvm_vcpu *vcpu) ASM_CALL_CONSTRAINT : [thunk_target]"r"(entry), - [ss]"i"(__KERNEL_DS), - [cs]"i"(__KERNEL_CS) +#ifdef CONFIG_X86_64 + [ss]"rme"(__KERNEL_DS), +#endif + [cs]"rme"(__KERNEL_CS) ); kvm_after_interrupt(vcpu); -- 2.25.4
