KVM tends to patch and emulated vmmcall on Intel. But that must not happen for L2.
Signed-off-by: Jan Kiszka <[email protected]> --- 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 [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
