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KVM: arm64: selftests: Test SEAs are taken to SError vector when EASE=1

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Ensure KVM routes SEAs to the correct vector depending on
SCTLR2_EL1.EASE.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250708172532.1699409-26-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Oliver Upton 2025-07-08 10:25:30 -07:00
parent 2858ea3083
commit a90aac5532
1 changed files with 41 additions and 1 deletions
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42
tools/testing/selftests/kvm/arm64/external_aborts.c
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@ -86,7 +86,7 @@ static void vcpu_run_expect_sync(struct kvm_vcpu *vcpu)
extern char test_mmio_abort_insn;
static void test_mmio_abort_guest(void)
static noinline void test_mmio_abort_guest(void)
{
WRITE_ONCE(expected_abort_pc, (u64)&test_mmio_abort_insn);
@ -251,6 +251,45 @@ static void test_serror_emulated(void)
kvm_vm_free(vm);
}
static void test_mmio_ease_guest(void)
{
sysreg_clear_set_s(SYS_SCTLR2_EL1, 0, SCTLR2_EL1_EASE);
isb();
test_mmio_abort_guest();
}
/*
* Test that KVM doesn't complete MMIO emulation when userspace has made an
* external abort pending for the instruction.
*/
static void test_mmio_ease(void)
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm = vm_create_with_dabt_handler(&vcpu, test_mmio_ease_guest,
unexpected_dabt_handler);
struct kvm_run *run = vcpu->run;
u64 pfr1;
pfr1 = vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(SYS_ID_AA64PFR1_EL1));
if (!SYS_FIELD_GET(ID_AA64PFR1_EL1, DF2, pfr1)) {
pr_debug("Skipping %s\n", __func__);
return;
}
vm_install_exception_handler(vm, VECTOR_ERROR_CURRENT, expect_serror_handler);
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_MMIO);
TEST_ASSERT_EQ(run->mmio.phys_addr, MMIO_ADDR);
TEST_ASSERT_EQ(run->mmio.len, sizeof(unsigned long));
TEST_ASSERT(!run->mmio.is_write, "Expected MMIO read");
vcpu_inject_sea(vcpu);
vcpu_run_expect_done(vcpu);
kvm_vm_free(vm);
}
int main(void)
{
test_mmio_abort();
@ -259,4 +298,5 @@ int main(void)
test_serror();
test_serror_masked();
test_serror_emulated();
test_mmio_ease();
}