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[2003:c9:3f4c:c600:a5cd:f10d:e606:b5e2]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6a15f1ccd4esm50917516d6.97.2024.05.14.00.23.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 May 2024 00:23:09 -0700 (PDT) From: Sebastian Ott To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org Cc: Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Catalin Marinas , Will Deacon Subject: [PATCH v3 6/6] KVM: selftests: arm64: Test writes to CTR_EL0 Date: Tue, 14 May 2024 09:22:52 +0200 Message-ID: <20240514072252.5657-7-sebott@redhat.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240514072252.5657-1-sebott@redhat.com> References: <20240514072252.5657-1-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" Test that CTR_EL0 is modifiable from userspace, that changes are visible to guests, and that they are preserved across a vCPU reset. Signed-off-by: Sebastian Ott Reviewed-by: Eric Auger --- .../testing/selftests/kvm/aarch64/set_id_regs.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/tools/testing/selftests/kvm/aarch64/set_id_regs.c b/tools/test= ing/selftests/kvm/aarch64/set_id_regs.c index a7de39fa2a0a..9583c04f1228 100644 --- a/tools/testing/selftests/kvm/aarch64/set_id_regs.c +++ b/tools/testing/selftests/kvm/aarch64/set_id_regs.c @@ -219,6 +219,7 @@ static void guest_code(void) GUEST_REG_SYNC(SYS_ID_AA64MMFR1_EL1); GUEST_REG_SYNC(SYS_ID_AA64MMFR2_EL1); GUEST_REG_SYNC(SYS_ID_AA64ZFR0_EL1); + GUEST_REG_SYNC(SYS_CTR_EL0); =20 GUEST_DONE(); } @@ -490,11 +491,25 @@ static void test_clidr(struct kvm_vcpu *vcpu) test_reg_vals[encoding_to_range_idx(SYS_CLIDR_EL1)] =3D clidr; } =20 +static void test_ctr(struct kvm_vcpu *vcpu) +{ + u64 ctr; + + vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(SYS_CTR_EL0), &ctr); + ctr &=3D ~CTR_EL0_DIC_MASK; + if (ctr & CTR_EL0_IminLine_MASK) + ctr--; + + vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_CTR_EL0), ctr); + test_reg_vals[encoding_to_range_idx(SYS_CTR_EL0)] =3D ctr; +} + static void test_vcpu_ftr_id_regs(struct kvm_vcpu *vcpu) { u64 val; =20 test_clidr(vcpu); + test_ctr(vcpu); =20 vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(SYS_MPIDR_EL1), &val); val++; @@ -525,6 +540,7 @@ static void test_reset_preserves_id_regs(struct kvm_vcp= u *vcpu) test_assert_id_reg_unchanged(vcpu, test_regs[i].reg); =20 test_assert_id_reg_unchanged(vcpu, SYS_CLIDR_EL1); + test_assert_id_reg_unchanged(vcpu, SYS_CTR_EL0); =20 ksft_test_result_pass("%s\n", __func__); } --=20 2.42.0