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envelope-from=aaron@os.amperecomputing.com; helo=NAM10-BN7-obe.outbound.protection.outlook.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Aaron Lindsay Reviewed-by: Richard Henderson --- target/arm/cpu.h | 1 + target/arm/cpu64.c | 48 +++++++++++++++++++++++++++++++--------------- 2 files changed, 34 insertions(+), 15 deletions(-) diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 868d844d5a..80683c428f 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -1053,6 +1053,7 @@ struct ArchCPU { */ bool prop_pauth; bool prop_pauth_impdef; + bool prop_pauth_qarma3; bool prop_lpa2; /* DCZ blocksize, in log_2(words), ie low 4 bits of DCZID_EL0 */ diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index 0fb07cc7b6..a5f4540c73 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -591,9 +591,6 @@ static void aarch64_add_sme_properties(Object *obj) void arm_cpu_pauth_finalize(ARMCPU *cpu, Error **errp) { - int arch_val = 0, impdef_val = 0; - uint64_t t; - /* Exit early if PAuth is enabled, and fall through to disable it */ if ((kvm_enabled() || hvf_enabled()) && cpu->prop_pauth) { if (!cpu_isar_feature(aa64_pauth, cpu)) { @@ -604,30 +601,50 @@ void arm_cpu_pauth_finalize(ARMCPU *cpu, Error **errp) return; } - /* TODO: Handle HaveEnhancedPAC, HaveEnhancedPAC2, HaveFPAC. */ + /* Write the features into the correct field for the algorithm in use */ if (cpu->prop_pauth) { + uint64_t t; + + if (cpu->prop_pauth_impdef && cpu->prop_pauth_qarma3) { + error_setg(errp, "Cannot set both qarma3 ('pauth-qarma3') and " + "impdef ('pauth-impdef') pointer authentication ciphers"); + return; + } + + /* Implement FEAT_FPACCOMBINE for address authentication and enable + * generic authentication for the chosen cipher. + */ + int address_auth = 0b0101; + int generic_auth = 0b0001; + if (cpu->prop_pauth_impdef) { - impdef_val = 1; + t = cpu->isar.id_aa64isar1; + t = FIELD_DP64(t, ID_AA64ISAR1, API, address_auth); + t = FIELD_DP64(t, ID_AA64ISAR1, GPI, generic_auth); + cpu->isar.id_aa64isar1 = t; + } else if (cpu->prop_pauth_qarma3) { + t = cpu->isar.id_aa64isar2; + t = FIELD_DP64(t, ID_AA64ISAR2, APA3, address_auth); + t = FIELD_DP64(t, ID_AA64ISAR2, GPA3, generic_auth); + cpu->isar.id_aa64isar2 = t; } else { - arch_val = 1; + t = cpu->isar.id_aa64isar1; + t = FIELD_DP64(t, ID_AA64ISAR1, APA, address_auth); + t = FIELD_DP64(t, ID_AA64ISAR1, GPA, generic_auth); + cpu->isar.id_aa64isar1 = t; } - } else if (cpu->prop_pauth_impdef) { - error_setg(errp, "cannot enable pauth-impdef without pauth"); + } else if (cpu->prop_pauth_impdef || cpu->prop_pauth_qarma3) { + error_setg(errp, "cannot enable pauth-impdef or pauth-qarma3 without pauth"); error_append_hint(errp, "Add pauth=on to the CPU property list.\n"); } - - t = cpu->isar.id_aa64isar1; - t = FIELD_DP64(t, ID_AA64ISAR1, APA, arch_val); - t = FIELD_DP64(t, ID_AA64ISAR1, GPA, arch_val); - t = FIELD_DP64(t, ID_AA64ISAR1, API, impdef_val); - t = FIELD_DP64(t, ID_AA64ISAR1, GPI, impdef_val); - cpu->isar.id_aa64isar1 = t; } static Property arm_cpu_pauth_property = DEFINE_PROP_BOOL("pauth", ARMCPU, prop_pauth, true); static Property arm_cpu_pauth_impdef_property = DEFINE_PROP_BOOL("pauth-impdef", ARMCPU, prop_pauth_impdef, false); +static Property arm_cpu_pauth_qarma3_property = + DEFINE_PROP_BOOL("pauth-qarma3", ARMCPU, prop_pauth_qarma3, false); static void aarch64_add_pauth_properties(Object *obj) { @@ -647,6 +664,7 @@ static void aarch64_add_pauth_properties(Object *obj) cpu->prop_pauth = cpu_isar_feature(aa64_pauth, cpu); } else { qdev_property_add_static(DEVICE(obj), &arm_cpu_pauth_impdef_property); + qdev_property_add_static(DEVICE(obj), &arm_cpu_pauth_qarma3_property); } }