Currently each MOV to a debug register causes a debug exit. Add a testcase to track upcoming improvements.
Signed-off-by: Paolo Bonzini <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
