Currently each MOV to a debug register causes a debug exit. Add a
testcase to track upcoming improvements.
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
x86/vmexit.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/x86/vmexit.c b/x86/vmexit.c
index 7e9af15..cc24738 100644
--- a/x86/vmexit.c
+++ b/x86/vmexit.c
@@ -130,6 +130,11 @@ static void outl_elcr_kernel(void)
outb(0x4d0, 0);
}
+static void mov_dr(void)
+{
+ asm volatile("mov %0, %%dr7" : : "r" (0x400L));
+}
+
static void ple_round_robin(void)
{
struct counter {
@@ -318,6 +323,7 @@ static struct test tests[] = {
{ inl_nop_qemu, "inl_from_qemu", .parallel = 1 },
{ inl_nop_kernel, "inl_from_kernel", .parallel = 1 },
{ outl_elcr_kernel, "outl_to_kernel", .parallel = 1 },
+ { mov_dr, "mov_dr", .parallel = 1 },
{ ipi, "ipi", is_smp, .parallel = 0, },
{ ipi_halt, "ipi+halt", is_smp, .parallel = 0, },
{ ple_round_robin, "ple-round-robin", .parallel = 1 },
--
1.8.3.1
--
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