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[97.126.115.157]) by smtp.gmail.com with ESMTPSA id j6sm17351809pfg.126.2019.02.01.11.54.07 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 01 Feb 2019 11:54:07 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Date: Fri, 1 Feb 2019 11:54:03 -0800 Message-Id: <20190201195404.30486-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20190201195404.30486-1-richard.henderson@linaro.org> References: <20190201195404.30486-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::643 Subject: [Qemu-devel] [PATCH v2 1/2] linux-user: Implement PR_PAC_RESET_KEYS X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, alex.bennee@linaro.org Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- v2: Check arg3-5 are zero. --- linux-user/aarch64/target_syscall.h | 7 ++++++ linux-user/syscall.c | 36 +++++++++++++++++++++++++++++ 2 files changed, 43 insertions(+) -- 2.17.2 diff --git a/linux-user/aarch64/target_syscall.h b/linux-user/aarch64/target_syscall.h index 937fd7989e..b595e5da82 100644 --- a/linux-user/aarch64/target_syscall.h +++ b/linux-user/aarch64/target_syscall.h @@ -22,6 +22,13 @@ struct target_pt_regs { #define TARGET_PR_SVE_SET_VL 50 #define TARGET_PR_SVE_GET_VL 51 +#define TARGET_PR_PAC_RESET_KEYS 54 +# define TARGET_PR_PAC_APIAKEY (1 << 0) +# define TARGET_PR_PAC_APIBKEY (1 << 1) +# define TARGET_PR_PAC_APDAKEY (1 << 2) +# define TARGET_PR_PAC_APDBKEY (1 << 3) +# define TARGET_PR_PAC_APGAKEY (1 << 4) + void arm_init_pauth_key(ARMPACKey *key); #endif /* AARCH64_TARGET_SYSCALL_H */ diff --git a/linux-user/syscall.c b/linux-user/syscall.c index b5786d4fc1..bf076cbf8c 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -9691,6 +9691,42 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1, } } return ret; + case TARGET_PR_PAC_RESET_KEYS: + { + CPUARMState *env = cpu_env; + ARMCPU *cpu = arm_env_get_cpu(env); + + if (arg3 || arg4 || arg5) { + return -TARGET_EINVAL; + } + if (cpu_isar_feature(aa64_pauth, cpu)) { + int all = (TARGET_PR_PAC_APIAKEY | TARGET_PR_PAC_APIBKEY | + TARGET_PR_PAC_APDAKEY | TARGET_PR_PAC_APDBKEY | + TARGET_PR_PAC_APGAKEY); + if (arg2 == 0) { + arg2 = all; + } else if (arg2 & ~all) { + return -TARGET_EINVAL; + } + if (arg2 & TARGET_PR_PAC_APIAKEY) { + arm_init_pauth_key(&env->apia_key); + } + if (arg2 & TARGET_PR_PAC_APIBKEY) { + arm_init_pauth_key(&env->apib_key); + } + if (arg2 & TARGET_PR_PAC_APDAKEY) { + arm_init_pauth_key(&env->apda_key); + } + if (arg2 & TARGET_PR_PAC_APDBKEY) { + arm_init_pauth_key(&env->apdb_key); + } + if (arg2 & TARGET_PR_PAC_APGAKEY) { + arm_init_pauth_key(&env->apga_key); + } + return 0; + } + } + return -TARGET_EINVAL; #endif /* AARCH64 */ case PR_GET_SECCOMP: case PR_SET_SECCOMP: