Commit a90aac55 authored by Oliver Upton's avatar Oliver Upton
Browse files

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



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

Reviewed-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250708172532.1699409-26-oliver.upton@linux.dev


Signed-off-by: default avatarOliver Upton <oliver.upton@linux.dev>
parent 2858ea30

tools/testing/selftests/kvm/arm64/external_aborts.c

+41 −1
Original line number Diff line number Diff line
@@ -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();

}