KVM tends to patch and emulated vmmcall on Intel. But that must not
happen for L2.
Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
---
If the recently posted fixed for KVM are applied, this test passes.
x86/vmx_tests.c | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/x86/vmx_tests.c b/x86/vmx_tests.c
index 41a9a82..4f8ace1 100644
--- a/x86/vmx_tests.c
+++ b/x86/vmx_tests.c
@@ -11,6 +11,7 @@
#include "fwcfg.h"
#include "isr.h"
#include "apic.h"
+#include "types.h"
u64 ia32_pat;
u64 ia32_efer;
@@ -1493,6 +1494,44 @@ static int msr_switch_exit_handler()
return VMX_TEST_EXIT;
}
+static int vmmcall_init(struct vmcs *vmcs )
+{
+ vmcs_write(EXC_BITMAP, 1 << UD_VECTOR);
+ return VMX_TEST_START;
+}
+
+static void vmmcall_main(void)
+{
+ asm volatile(
+ "mov $0xABCD, %%rax\n\t"
+ "vmmcall\n\t"
+ ::: "rax");
+
+ report("VMMCALL", 0);
+}
+
+static int vmmcall_exit_handler()
+{
+ ulong reason;
+
+ reason = vmcs_read(EXI_REASON);
+ switch (reason) {
+ case VMX_VMCALL:
+ printf("here\n");
+ report("VMMCALL triggers #UD", 0);
+ break;
+ case VMX_EXC_NMI:
+ report("VMMCALL triggers #UD",
+ (vmcs_read(EXI_INTR_INFO) & 0xff) == UD_VECTOR);
+ break;
+ default:
+ printf("Unknown exit reason, %d\n", reason);
+ print_vmexit_info();
+ }
+
+ return VMX_TEST_VMEXIT;
+}
+
/* name/init/guest_main/exit_handler/syscall_handler/guest_regs */
struct vmx_test vmx_tests[] = {
{ "null", NULL, basic_guest_main, basic_exit_handler, NULL, {0} },
@@ -1516,5 +1555,6 @@ struct vmx_test vmx_tests[] = {
NULL, {0} },
{ "MSR switch", msr_switch_init, msr_switch_main,
msr_switch_exit_handler, NULL, {0} },
+ { "vmmcall", vmmcall_init, vmmcall_main, vmmcall_exit_handler, NULL, {0} },
{ NULL, NULL, NULL, NULL, NULL, {0} },
};
--
2.1.4
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
