CR8 is only available in long mode.
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
---
x86/vmexit.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/x86/vmexit.c b/x86/vmexit.c
index 819c24b..84c384d 100644
--- a/x86/vmexit.c
+++ b/x86/vmexit.c
@@ -49,6 +49,7 @@ static void vmcall(void)
#define MSR_EFER 0xc0000080
#define EFER_NX_MASK (1ull << 11)
+#ifdef __x86_64__
static void mov_from_cr8(void)
{
unsigned long cr8;
@@ -62,6 +63,7 @@ static void mov_to_cr8(void)
asm volatile ("mov %0, %%cr8" : : "r"(cr8));
}
+#endif
static int is_smp(void)
{
@@ -100,8 +102,10 @@ static struct test {
} tests[] = {
{ cpuid_test, "cpuid", .parallel = 1, },
{ vmcall, "vmcall", .parallel = 1, },
+#ifdef __x86_64__
{ mov_from_cr8, "mov_from_cr8", .parallel = 1, },
{ mov_to_cr8, "mov_to_cr8" , .parallel = 1, },
+#endif
{ inl_pmtimer, "inl_from_pmtimer", .parallel = 1, },
{ ipi, "ipi", is_smp, .parallel = 0, },
{ ipi_halt, "ipi+halt", is_smp, .parallel = 0, },
--
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