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KVM: arm64: Test that SMC64 arch calls are reserved

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Assert that the SMC64 view of the Arm architecture range is reserved by
KVM and cannot be filtered by userspace.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230408121732.3411329-3-oliver.upton@linux.dev
This commit is contained in:
Oliver Upton 2023-04-08 12:17:32 +00:00 committed by Marc Zyngier
parent 5a23ad6510
commit 00e0c94711
1 changed files with 8 additions and 0 deletions
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8
tools/testing/selftests/kvm/aarch64/smccc_filter.c
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@ -99,6 +99,7 @@ static void test_filter_reserved_range(void)
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm = setup_vm(&vcpu);
uint32_t smc64_fn;
int r;
r = __set_smccc_filter(vm, ARM_SMCCC_ARCH_WORKAROUND_1,
@ -106,6 +107,13 @@ static void test_filter_reserved_range(void)
TEST_ASSERT(r < 0 && errno == EEXIST,
"Attempt to filter reserved range should return EEXIST");
smc64_fn = ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64,
0, 0);
r = __set_smccc_filter(vm, smc64_fn, 1, KVM_SMCCC_FILTER_DENY);
TEST_ASSERT(r < 0 && errno == EEXIST,
"Attempt to filter reserved range should return EEXIST");
kvm_vm_free(vm);
}