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: Avi Kivity <avi@xxxxxxxxxx>
---
arch/x86/kvm/vmx.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index d62b413..5faf12a 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -127,6 +127,8 @@
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)),
--
1.7.12
--
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