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[2003:f6:af0e:4d00:dda5:3016:e366:575f]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-38dcc9bd251sm11745833f8f.9.2025.02.11.06.39.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Feb 2025 06:39:16 -0800 (PST) From: Sebastian Ott To: Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Shameer Kolothum Cc: Cornelia Huck , Eric Auger , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH v2 4/4] KVM: selftests: arm64: Test writes to MIDR,REVIDR,AIDR Date: Tue, 11 Feb 2025 15:39:10 +0100 Message-ID: <20250211143910.16775-5-sebott@redhat.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250211143910.16775-1-sebott@redhat.com> References: <20250211143910.16775-1-sebott@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Assert that MIDR_EL1, REVIDR_EL1, AIDR_EL1 are writable from userspace, that the changed values are visible to guests, and that they are preserved across a vCPU reset. Signed-off-by: Sebastian Ott --- .../testing/selftests/kvm/arm64/set_id_regs.c | 32 +++++++++++++++---- 1 file changed, 26 insertions(+), 6 deletions(-) diff --git a/tools/testing/selftests/kvm/arm64/set_id_regs.c b/tools/testin= g/selftests/kvm/arm64/set_id_regs.c index 217541fe6536..d719c2ab1e31 100644 --- a/tools/testing/selftests/kvm/arm64/set_id_regs.c +++ b/tools/testing/selftests/kvm/arm64/set_id_regs.c @@ -230,6 +230,9 @@ static void guest_code(void) GUEST_REG_SYNC(SYS_ID_AA64MMFR2_EL1); GUEST_REG_SYNC(SYS_ID_AA64ZFR0_EL1); GUEST_REG_SYNC(SYS_CTR_EL0); + GUEST_REG_SYNC(SYS_MIDR_EL1); + GUEST_REG_SYNC(SYS_REVIDR_EL1); + GUEST_REG_SYNC(SYS_AIDR_EL1); =20 GUEST_DONE(); } @@ -609,18 +612,31 @@ static void test_ctr(struct kvm_vcpu *vcpu) test_reg_vals[encoding_to_range_idx(SYS_CTR_EL0)] =3D ctr; } =20 -static void test_vcpu_ftr_id_regs(struct kvm_vcpu *vcpu) +static void test_id_reg(struct kvm_vcpu *vcpu, u32 id) { u64 val; =20 + val =3D vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(id)); + val++; + vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(id), val); + test_reg_vals[encoding_to_range_idx(id)] =3D val; +} + +static void test_vcpu_ftr_id_regs(struct kvm_vcpu *vcpu) +{ test_clidr(vcpu); test_ctr(vcpu); =20 - val =3D vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(SYS_MPIDR_EL1)); - val++; - vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_MPIDR_EL1), val); + test_id_reg(vcpu, SYS_MPIDR_EL1); + ksft_test_result_pass("%s\n", __func__); +} + +static void test_vcpu_non_ftr_id_regs(struct kvm_vcpu *vcpu) +{ + test_id_reg(vcpu, SYS_MIDR_EL1); + test_id_reg(vcpu, SYS_REVIDR_EL1); + test_id_reg(vcpu, SYS_AIDR_EL1); =20 - test_reg_vals[encoding_to_range_idx(SYS_MPIDR_EL1)] =3D val; ksft_test_result_pass("%s\n", __func__); } =20 @@ -647,6 +663,9 @@ static void test_reset_preserves_id_regs(struct kvm_vcp= u *vcpu) test_assert_id_reg_unchanged(vcpu, SYS_MPIDR_EL1); test_assert_id_reg_unchanged(vcpu, SYS_CLIDR_EL1); test_assert_id_reg_unchanged(vcpu, SYS_CTR_EL0); + test_assert_id_reg_unchanged(vcpu, SYS_MIDR_EL1); + test_assert_id_reg_unchanged(vcpu, SYS_REVIDR_EL1); + test_assert_id_reg_unchanged(vcpu, SYS_AIDR_EL1); =20 ksft_test_result_pass("%s\n", __func__); } @@ -675,13 +694,14 @@ int main(void) ARRAY_SIZE(ftr_id_aa64isar2_el1) + ARRAY_SIZE(ftr_id_aa64pfr0_el1) + ARRAY_SIZE(ftr_id_aa64pfr1_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) + 2 + + ARRAY_SIZE(ftr_id_aa64zfr0_el1) - ARRAY_SIZE(test_regs) + 3 + MPAM_IDREG_TEST; =20 ksft_set_plan(test_cnt); =20 test_vm_ftr_id_regs(vcpu, aarch64_only); test_vcpu_ftr_id_regs(vcpu); + test_vcpu_non_ftr_id_regs(vcpu); test_user_set_mpam_reg(vcpu); =20 test_guest_reg_read(vcpu); --=20 2.42.0