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KVM: selftests: Print out guest RIP on unhandled exception

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Use the newfanged printf-based guest assert framework to spit out the
guest RIP when an unhandled exception is detected, which makes debugging
such failures *much* easier.

Link: https://lore.kernel.org/r/20230729003643.1053367-34-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2023-07-28 17:36:42 -07:00
parent 7ce7f8e754
commit 6f321017c8
1 changed files with 6 additions and 12 deletions
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18
tools/testing/selftests/kvm/lib/x86_64/processor.c
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@ -1074,11 +1074,6 @@ static bool kvm_fixup_exception(struct ex_regs *regs)
return true;
}
void kvm_exit_unexpected_vector(uint32_t value)
{
ucall(UCALL_UNHANDLED, 1, value);
}
void route_exception(struct ex_regs *regs)
{
typedef void(*handler)(struct ex_regs *);
@ -1092,7 +1087,10 @@ void route_exception(struct ex_regs *regs)
if (kvm_fixup_exception(regs))
return;
kvm_exit_unexpected_vector(regs->vector);
ucall_assert(UCALL_UNHANDLED,
"Unhandled exception in guest", __FILE__, __LINE__,
"Unhandled exception '0x%lx' at guest RIP '0x%lx'",
regs->vector, regs->rip);
}
void vm_init_descriptor_tables(struct kvm_vm *vm)
@ -1135,12 +1133,8 @@ void assert_on_unhandled_exception(struct kvm_vcpu *vcpu)
{
struct ucall uc;
if (get_ucall(vcpu, &uc) == UCALL_UNHANDLED) {
uint64_t vector = uc.args[0];
TEST_FAIL("Unexpected vectored event in guest (vector:0x%lx)",
vector);
}
if (get_ucall(vcpu, &uc) == UCALL_UNHANDLED)
REPORT_GUEST_ASSERT(uc);
}
const struct kvm_cpuid_entry2 *get_cpuid_entry(const struct kvm_cpuid2 *cpuid,