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Mon, 10 Jan 2022 22:51:52 -0500 Received: from localhost.localdomain (unknown [180.156.147.178]) by APP-05 (Coremail) with SMTP id zQCowAD3_wPK_txh2Dz9BQ--.65038S7; Tue, 11 Jan 2022 11:51:42 +0800 (CST) From: Weiwei Li To: richard.henderson@linaro.org, palmer@dabbelt.com, alistair.francis@wdc.com, bin.meng@windriver.com, qemu-riscv@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH v4 5/7] target/riscv: rvk: add CSR support for Zkr Date: Tue, 11 Jan 2022 11:51:22 +0800 Message-Id: <20220111035124.9468-6-liweiwei@iscas.ac.cn> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220111035124.9468-1-liweiwei@iscas.ac.cn> References: <20220111035124.9468-1-liweiwei@iscas.ac.cn> X-CM-TRANSID: zQCowAD3_wPK_txh2Dz9BQ--.65038S7 X-Coremail-Antispam: 1UD129KBjvJXoWxCF15WF4DAFyrtw4kZF1UWrg_yoW7JFWkpr 4kCay3GryFvFZ7Aw4ftF15WF15G34rGayfJ397uw4kAF13J3yrJrnxW39IqFn5Xas5CrW2 9F4qyFn0kr47XaDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPa14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F 4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v26F4U JVW0owAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7V C0I7IYx2IY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j 6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x0262 8vn2kIc2xKxwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02 F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GF ylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVW8JVW5JwCI42IY6xIIjxv20xvEc7Cj xVAFwI0_Cr0_Gr1UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxV W8JVWxJwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfU F18BUUUUU X-Originating-IP: [180.156.147.178] X-CM-SenderInfo: 5olzvxxzhlqxpvfd2hldfou0/ Received-SPF: pass client-ip=159.226.251.25; envelope-from=liweiwei@iscas.ac.cn; helo=cstnet.cn X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, 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: , Cc: wangjunqiang@iscas.ac.cn, Weiwei Li , lazyparser@gmail.com, luruibo2000@163.com, lustrew@foxmail.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" - add SEED CSR - add USEED, SSEED fields for MSECCFG CSR Co-authored-by: Ruibo Lu Co-authored-by: Zewen Ye Signed-off-by: Weiwei Li Signed-off-by: Junqiang Wang --- target/riscv/cpu_bits.h | 9 +++++ target/riscv/csr.c | 74 +++++++++++++++++++++++++++++++++++++++++ target/riscv/pmp.h | 8 +++-- 3 files changed, 88 insertions(+), 3 deletions(-) diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index 5a6d49aa64..65c708622b 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -374,6 +374,9 @@ #define CSR_VSPMMASK 0x2c1 #define CSR_VSPMBASE 0x2c2 +/* Crypto Extension */ +#define CSR_SEED 0x015 + /* mstatus CSR bits */ #define MSTATUS_UIE 0x00000001 #define MSTATUS_SIE 0x00000002 @@ -628,4 +631,10 @@ typedef enum RISCVException { #define UMTE_U_PM_INSN U_PM_INSN #define UMTE_MASK (UMTE_U_PM_ENABLE | MMTE_U_PM_CURRENT | UMTE_U_PM_INSN) +/* seed CSR bits */ +#define SEED_OPST (0b11 << 30) +#define SEED_OPST_BIST (0b00 << 30) +#define SEED_OPST_WAIT (0b01 << 30) +#define SEED_OPST_ES16 (0b10 << 30) +#define SEED_OPST_DEAD (0b11 << 30) #endif diff --git a/target/riscv/csr.c b/target/riscv/csr.c index adb3d4381d..9d93e72f68 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -22,6 +22,8 @@ #include "cpu.h" #include "qemu/main-loop.h" #include "exec/exec-all.h" +#include "qemu/guest-random.h" +#include "qapi/error.h" /* CSR function table public API */ void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops) @@ -222,6 +224,38 @@ static RISCVException epmp(CPURISCVState *env, int csrno) } #endif +/* Predicates */ +static RISCVException seed(CPURISCVState *env, int csrno) +{ + RISCVCPU *cpu = env_archcpu(env); + if (!cpu->cfg.ext_zkr) { + return RISCV_EXCP_ILLEGAL_INST; + } +#if !defined(CONFIG_USER_ONLY) + if (riscv_has_ext(env, RVS) && riscv_has_ext(env, RVH)) { + /* Hypervisor extension is supported */ + if (riscv_cpu_virt_enabled(env) && (env->priv != PRV_M)) { + if (env->mseccfg & MSECCFG_SSEED) { + return RISCV_EXCP_VIRT_INSTRUCTION_FAULT; + } else { + return RISCV_EXCP_ILLEGAL_INST; + } + } + } + if (env->priv == PRV_M) { + return RISCV_EXCP_NONE; + } else if (env->priv == PRV_S && (env->mseccfg & MSECCFG_SSEED)) { + return RISCV_EXCP_NONE; + } else if (env->priv == PRV_U && (env->mseccfg & MSECCFG_USEED)) { + return RISCV_EXCP_NONE; + } else { + return RISCV_EXCP_ILLEGAL_INST; + } +#else + return RISCV_EXCP_NONE; +#endif +} + /* User Floating-Point CSRs */ static RISCVException read_fflags(CPURISCVState *env, int csrno, target_ulong *val) @@ -1785,6 +1819,39 @@ static RISCVException write_upmbase(CPURISCVState *env, int csrno, #endif +/* Crypto Extension */ +static int read_seed(CPURISCVState *env, int csrno, target_ulong *val) +{ + *val = 0; + uint32_t return_status = SEED_OPST_ES16; + *val = (*val) | return_status; + if (return_status == SEED_OPST_ES16) { + uint16_t random_number; + Error *err = NULL; + if (qemu_guest_getrandom(&random_number, sizeof(random_number), + &err) < 0) { + qemu_log_mask(LOG_UNIMP, "Seed: Crypto failure: %s", + error_get_pretty(err)); + error_free(err); + return -1; + } + *val = (*val) | random_number; + } else if (return_status == SEED_OPST_BIST) { + /* Do nothing */ + } else if (return_status == SEED_OPST_WAIT) { + /* Do nothing */ + } else if (return_status == SEED_OPST_DEAD) { + /* Do nothing */ + } + return 0; +} + +static RISCVException write_seed(CPURISCVState *env, int csrno, + target_ulong val) +{ + return RISCV_EXCP_NONE; +} + /* * riscv_csrrw - read and/or update control and status register * @@ -1823,6 +1890,10 @@ static inline RISCVException riscv_csrrw_check(CPURISCVState *env, return RISCV_EXCP_ILLEGAL_INST; } + if (!write_mask && (csrno == CSR_SEED)) { + return RISCV_EXCP_ILLEGAL_INST; + } + /* ensure the CSR extension is enabled. */ if (!cpu->cfg.ext_icsr) { return RISCV_EXCP_ILLEGAL_INST; @@ -2011,6 +2082,9 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = { [CSR_TIME] = { "time", ctr, read_time }, [CSR_TIMEH] = { "timeh", ctr32, read_timeh }, + /* Crypto Extension */ + [CSR_SEED] = { "seed", seed, read_seed, write_seed}, + #if !defined(CONFIG_USER_ONLY) /* Machine Timers and Counters */ [CSR_MCYCLE] = { "mcycle", any, read_instret }, diff --git a/target/riscv/pmp.h b/target/riscv/pmp.h index a9a0b363a7..83135849bb 100644 --- a/target/riscv/pmp.h +++ b/target/riscv/pmp.h @@ -37,9 +37,11 @@ typedef enum { } pmp_am_t; typedef enum { - MSECCFG_MML = 1 << 0, - MSECCFG_MMWP = 1 << 1, - MSECCFG_RLB = 1 << 2 + MSECCFG_MML = 1 << 0, + MSECCFG_MMWP = 1 << 1, + MSECCFG_RLB = 1 << 2, + MSECCFG_USEED = 1 << 8, + MSECCFG_SSEED = 1 << 9 } mseccfg_field_t; typedef struct {