[PATCH kvm-unit-tests] x86: vmx: fix RDPMC interception test

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RDPMC can cause a general protection fault if ECX is not within the
valid range for performance counters.  Tweak the test to ensure that
ECX is valid.

Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
 x86/vmx_tests.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/x86/vmx_tests.c b/x86/vmx_tests.c
index b3ddec6..d851692 100644
--- a/x86/vmx_tests.c
+++ b/x86/vmx_tests.c
@@ -733,7 +733,7 @@ asm(
 	"insn_hlt: hlt;ret\n\t"
 	"insn_invlpg: invlpg 0x12345678;ret\n\t"
 	"insn_mwait: mwait;ret\n\t"
-	"insn_rdpmc: rdpmc;ret\n\t"
+	"insn_rdpmc: xor %ecx, %ecx; rdpmc;ret\n\t"
 	"insn_rdtsc: rdtsc;ret\n\t"
 	"insn_cr3_load: mov cr3,%rax; mov %rax,%cr3;ret\n\t"
 	"insn_cr3_store: mov %cr3,%rax;ret\n\t"
-- 
2.5.0

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