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KVM: selftests: arm64: Test that feature ID regs survive a reset

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One of the expectations with feature ID registers is that their values
survive a vCPU reset. Start testing that.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20240502233529.1958459-7-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Oliver Upton 2024-05-02 23:35:28 +00:00 committed by Marc Zyngier
parent 46247a317f
commit 07eabd8a52
1 changed files with 33 additions and 8 deletions
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41
tools/testing/selftests/kvm/aarch64/set_id_regs.c
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@ -457,13 +457,36 @@ static void test_guest_reg_read(struct kvm_vcpu *vcpu)
}
}
static void test_assert_id_reg_unchanged(struct kvm_vcpu *vcpu, uint32_t encoding)
{
size_t idx = encoding_to_range_idx(encoding);
uint64_t observed;
vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(encoding), &observed);
TEST_ASSERT_EQ(test_reg_vals[idx], observed);
}
static void test_reset_preserves_id_regs(struct kvm_vcpu *vcpu)
{
/*
* Calls KVM_ARM_VCPU_INIT behind the scenes, which will do an
* architectural reset of the vCPU.
*/
aarch64_vcpu_setup(vcpu, NULL);
for (int i = 0; i < ARRAY_SIZE(test_regs); i++)
test_assert_id_reg_unchanged(vcpu, test_regs[i].reg);
ksft_test_result_pass("%s\n", __func__);
}
int main(void)
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
bool aarch64_only;
uint64_t val, el0;
int ftr_cnt;
int test_cnt;
TEST_REQUIRE(kvm_has_cap(KVM_CAP_ARM_SUPPORTED_REG_MASK_RANGES));
@ -476,18 +499,20 @@ int main(void)
ksft_print_header();
ftr_cnt = ARRAY_SIZE(ftr_id_aa64dfr0_el1) + ARRAY_SIZE(ftr_id_dfr0_el1) +
ARRAY_SIZE(ftr_id_aa64isar0_el1) + ARRAY_SIZE(ftr_id_aa64isar1_el1) +
ARRAY_SIZE(ftr_id_aa64isar2_el1) + ARRAY_SIZE(ftr_id_aa64pfr0_el1) +
ARRAY_SIZE(ftr_id_aa64mmfr0_el1) + ARRAY_SIZE(ftr_id_aa64mmfr1_el1) +
ARRAY_SIZE(ftr_id_aa64mmfr2_el1) + ARRAY_SIZE(ftr_id_aa64zfr0_el1) -
ARRAY_SIZE(test_regs);
test_cnt = ARRAY_SIZE(ftr_id_aa64dfr0_el1) + ARRAY_SIZE(ftr_id_dfr0_el1) +
ARRAY_SIZE(ftr_id_aa64isar0_el1) + ARRAY_SIZE(ftr_id_aa64isar1_el1) +
ARRAY_SIZE(ftr_id_aa64isar2_el1) + ARRAY_SIZE(ftr_id_aa64pfr0_el1) +
ARRAY_SIZE(ftr_id_aa64mmfr0_el1) + ARRAY_SIZE(ftr_id_aa64mmfr1_el1) +
ARRAY_SIZE(ftr_id_aa64mmfr2_el1) + ARRAY_SIZE(ftr_id_aa64zfr0_el1) -
ARRAY_SIZE(test_regs) + 1;
ksft_set_plan(ftr_cnt);
ksft_set_plan(test_cnt);
test_vm_ftr_id_regs(vcpu, aarch64_only);
test_guest_reg_read(vcpu);
test_reset_preserves_id_regs(vcpu);
kvm_vm_free(vm);
ksft_finished();