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Commit 83287ea4 authored by Avi Kivity's avatar Avi Kivity Committed by Marcelo Tosatti
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KVM: VMX: Make lto-friendly



LTO (link-time optimization) doesn't like local labels to be referred to
from a different function, since the two functions may be built in separate
compilation units.  Use an external variable instead.

Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent ecba9a52
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+11 −6
Original line number Diff line number Diff line
@@ -127,6 +127,8 @@ module_param(ple_gap, int, S_IRUGO);
static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW;
module_param(ple_window, int, S_IRUGO);

extern const ulong vmx_return;

#define NR_AUTOLOAD_MSRS 8
#define VMCS02_POOL_SIZE 1

@@ -3724,8 +3726,7 @@ static void vmx_set_constant_host_state(void)
	native_store_idt(&dt);
	vmcs_writel(HOST_IDTR_BASE, dt.address);   /* 22.2.4 */

	asm("mov $.Lkvm_vmx_return, %0" : "=r"(tmpl));
	vmcs_writel(HOST_RIP, tmpl); /* 22.2.5 */
	vmcs_writel(HOST_RIP, vmx_return); /* 22.2.5 */

	rdmsr(MSR_IA32_SYSENTER_CS, low32, high32);
	vmcs_write32(HOST_IA32_SYSENTER_CS, low32);
@@ -6276,11 +6277,11 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
		"mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */

		/* Enter guest mode */
		"jne .Llaunched \n\t"
		"jne 1f \n\t"
		__ex(ASM_VMX_VMLAUNCH) "\n\t"
		"jmp .Lkvm_vmx_return \n\t"
		".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t"
		".Lkvm_vmx_return: "
		"jmp 2f \n\t"
		"1: " __ex(ASM_VMX_VMRESUME) "\n\t"
		"2: "
		/* Save guest registers, load host registers, keep flags */
		"mov %0, %c[wordsize](%%"R"sp) \n\t"
		"pop %0 \n\t"
@@ -6306,6 +6307,10 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)

		"pop  %%"R"bp; pop  %%"R"dx \n\t"
		"setbe %c[fail](%0) \n\t"
		".pushsection .rodata \n\t"
		".global vmx_return \n\t"
		"vmx_return: " _ASM_PTR " 2b \n\t"
		".popsection"
	      : : "c"(vmx), "d"((unsigned long)HOST_RSP),
		[launched]"i"(offsetof(struct vcpu_vmx, __launched)),
		[fail]"i"(offsetof(struct vcpu_vmx, fail)),