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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=68.232.143.124; envelope-from=prvs=730c0c5bd=alistair.francis@wdc.com; helo=esa2.hgst.iphmx.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alistair.francis@wdc.com, bmeng.cn@gmail.com, palmer@dabbelt.com, alistair23@gmail.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" The RISC-V spec says: if PMP entry i is locked and pmpicfg.A is set to TOR, writes to pmpaddri-1 are ignored. The current QEMU code ignores accesses to pmpaddri-1 and pmpcfgi-1 which is incorrect. Update the pmp_is_locked() function to not check the supporting fields and instead enforce the lock functionality in the pmpaddr write operation. Signed-off-by: Alistair Francis Reviewed-by: Bin Meng --- target/riscv/pmp.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-) diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index cff020122a..a3b253bb15 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -59,16 +59,6 @@ static inline int pmp_is_locked(CPURISCVState *env, uint= 32_t pmp_index) return 0; } =20 - /* In TOR mode, need to check the lock bit of the next pmp - * (if there is a next) - */ - const uint8_t a_field =3D - pmp_get_a_field(env->pmp_state.pmp[pmp_index + 1].cfg_reg); - if ((env->pmp_state.pmp[pmp_index + 1u].cfg_reg & PMP_LOCK) && - (PMP_AMATCH_TOR =3D=3D a_field)) { - return 1; - } - return 0; } =20 @@ -380,7 +370,23 @@ void pmpaddr_csr_write(CPURISCVState *env, uint32_t ad= dr_index, target_ulong val) { trace_pmpaddr_csr_write(env->mhartid, addr_index, val); + if (addr_index < MAX_RISCV_PMPS) { + /* + * In TOR mode, need to check the lock bit of the next pmp + * (if there is a next). + */ + if (addr_index + 1 < MAX_RISCV_PMPS) { + uint8_t pmp_cfg =3D env->pmp_state.pmp[addr_index + 1].cfg_reg; + + if (pmp_cfg & PMP_LOCK && + PMP_AMATCH_TOR =3D=3D pmp_get_a_field(pmp_cfg)) { + qemu_log_mask(LOG_GUEST_ERROR, + "ignoring pmpaddr write - pmpcfg + 1 locked\= n"); + return; + } + } + if (!pmp_is_locked(env, addr_index)) { env->pmp_state.pmp[addr_index].addr_reg =3D val; pmp_update_rule(env, addr_index); --=20 2.31.1 From nobody Sat May 18 18:27:42 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail header.i=@wdc.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=wdc.com ARC-Seal: i=1; a=rsa-sha256; t=1618281967; cv=none; d=zohomail.com; s=zohoarc; b=ZcFPz81xm9nzgAGYIzMNmproRjBjC2szys4bVIgR04HMcPBH6can6tMWqvPqKi7q0qgTrZ7inRdtKSZLCNIt7zH2gF8+9j4CfWsBL3pR2gKqyo27EzHwxcvq7L1oKVSBFLEP1uESUwKJtcPAHxIpb8mMJ4ECenLA2iFsZ1y+JCQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.71.154.42; envelope-from=prvs=730c0c5bd=alistair.francis@wdc.com; helo=esa4.hgst.iphmx.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alistair.francis@wdc.com, bmeng.cn@gmail.com, palmer@dabbelt.com, alistair23@gmail.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Hou Weiying Use address 0x390 and 0x391 for the ePMP CSRs. Signed-off-by: Hongzheng-Li Signed-off-by: Hou Weiying Signed-off-by: Myriad-Dreamin Reviewed-by: Alistair Francis Message-Id: [ Changes by AF: - Tidy up commit message ] Signed-off-by: Alistair Francis Reviewed-by: Bin Meng --- target/riscv/cpu_bits.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index 8549d77b4f..24d89939a0 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -220,6 +220,9 @@ #define CSR_MTINST 0x34a #define CSR_MTVAL2 0x34b =20 +/* Enhanced Physical Memory Protection (ePMP) */ +#define CSR_MSECCFG 0x390 +#define CSR_MSECCFGH 0x391 /* Physical Memory Protection */ #define CSR_PMPCFG0 0x3a0 #define CSR_PMPCFG1 0x3a1 --=20 2.31.1 From nobody Sat May 18 18:27:42 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail header.i=@wdc.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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d="scan'208";a="164190738" IronPort-SDR: SYgiMQQd6PSxYSv9iNp8QEAHuNSZM1DW3u82hJz9Hm/AoqCg232RDPgFJ2eOjHek6LfnW4r5fB AUOpAsK50T23+eT9V1tEsFDqyjO5w+iFNJX7sZco3BC9C3FL7at3rVwdnflW/lQ8E8mOxYkUmC 2D7MZPle1QskVTRygTmWTYiDfXMNXRrVK2HLLOnK9gkO7Hmrh0UzuB+ACstIen4To7/iWDbrka Hwa352OALjtqjes1z6Aav2HIgQ9d5yb0NvBMQtH1yzJ8Db4aXDp/isVTJ1rLKMX+8CySmuOVOJ z77yBe+pKHtJA6F8mDlb/MDC IronPort-SDR: 4cy/XtgGsOlvE2oddCxjE7SGVFqTX81AVLVEkYJM0Sh0+4blMoj8LF+QWevkkQiYLzeUnao0r+ wQJYA/mLUIE1A2Mp40PgJz5GO4wz7UfSz9MRwTR1Yv50MAJLrxKwCkA8k4lPq98XJix2HpjeTq JKjwIYcM4y92spjKFjhOTetUw0DLiRxQF+nCCHDhwxKUS+QxH3ZHjXj3DtDgYFEGy6ac5FyhHn tztUkCZ0Uf7bVr0ULnnCW3r3+E7OIb5Pr6fXDHOQ62c8TkdCQ23aPLc4SphwT2rRf5UtB+NFPQ ptM= WDCIronportException: Internal From: Alistair Francis To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [PATCH v3 3/8] target/riscv: Add the ePMP feature Date: Tue, 13 Apr 2021 12:42:09 +1000 Message-Id: <3a2615d3f1433a025c7035673f66e4b72cb22878.1618281655.git.alistair.francis@wdc.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.71.154.42; envelope-from=prvs=730c0c5bd=alistair.francis@wdc.com; helo=esa4.hgst.iphmx.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alistair.francis@wdc.com, bmeng.cn@gmail.com, palmer@dabbelt.com, alistair23@gmail.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" The spec is avaliable at: https://docs.google.com/document/d/1Mh_aiHYxemL0umN3GTTw8vsbmzHZ_nxZXgjgOUz= bvc8 Signed-off-by: Alistair Francis Reviewed-by: Bin Meng --- target/riscv/cpu.h | 1 + 1 file changed, 1 insertion(+) diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 842d3ab810..13a08b86f6 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -81,6 +81,7 @@ enum { RISCV_FEATURE_MMU, RISCV_FEATURE_PMP, + RISCV_FEATURE_EPMP, RISCV_FEATURE_MISA }; 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IronPort-SDR: 8rrlo3sAX5t7GAGPkTiFpJ9H8V1afhz6rg6jVADHRfBeQKMVJIwJdQVB5qPqAKXboT3mkiSYQe kGb8mQ6wTRMQ1Q3IrBuKdXLEUAig0bjUByGcesl+4Po5HEDqWpMmnzu++jcGE2DtQIPz6gUYCc ChsofMYPezMXJf/yS/BqrV2lCXPqGrrLsYwnLkFG44SjAKOUle647dm4KHUVqhi6sd112Oru0i ljNvul2vKTsXiuS3zNMKiClXc+/PKJFMWw4godVrsIf73ZaouSBNVTVmgls4cwoewlQbAPIs8/ Vd8= X-IronPort-AV: E=Sophos;i="5.82,216,1613404800"; d="scan'208";a="169070139" IronPort-SDR: jcj2owI6coloN1o94S57TtTjtixtDQPcc9A3c+mpazoLXE13iBehjHHmkKdrSCL7M3ZfvofNPe quJlQ1kqRPAbTbqUPsJUhZ0lV9LvvFu0zjFnQWxktk9Lhftsrz1YtzJ2ngg4ONTpDgXt4zcWDw hZMp16/kob7uvi9JIgF7Ts/n/EQmg6DB3b65Cd3lCELdiyw/YAMhGuAcYBQs06IcEPZ7c3uoAP BwB7FPw+WBe7fS2GxoDg1sD29jGgq+qTm8y8Us3rb/6NjXfWfn7Q9Idc2hHZUfnW77PUcows3f lGRVVJZ8BkvfcUX9J9DbqJx4 IronPort-SDR: TxIPsBiI59tPPAkTY7MwRdJSbjbI5ehbytqd+3DBbpLJC3qLSGfM5DfV2nlZrRPXGJoWOX0LFg Ow1xCv6k1ndwwUxj+AtaQ6aA0efJQ8vZIGM6111+J7EJ7ZMRPRdSOyvunsPGm6rOa2uCsq4ro5 9K2iiasNhmkYAhD6Y6oR7RMnICk7R6tc2yd3CXUOL1CVl2yZYMStt9Kq1Qxi/Z0A+ESxtR2lbx aaa0wGi5pRovCV8NEP/l0hkr3Ap87ycCaX0aTgFkSvjVVzQU6x5QouyIbrT4ZrKz8Kfvd5TxQQ R30= WDCIronportException: Internal From: Alistair Francis To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [PATCH v3 4/8] target/riscv: Add ePMP CSR access functions Date: Tue, 13 Apr 2021 12:42:23 +1000 Message-Id: <19e68047049b7390801464bf9986500777c4ab68.1618281655.git.alistair.francis@wdc.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.71.153.141; envelope-from=prvs=730c0c5bd=alistair.francis@wdc.com; helo=esa3.hgst.iphmx.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alistair.francis@wdc.com, bmeng.cn@gmail.com, palmer@dabbelt.com, alistair23@gmail.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Hou Weiying Signed-off-by: Hongzheng-Li Signed-off-by: Hou Weiying Signed-off-by: Myriad-Dreamin Message-Id: [ Changes by AF: - Rebase on master - Fix build errors - Fix some style issues ] Signed-off-by: Alistair Francis Reviewed-by: Bin Meng --- target/riscv/cpu.h | 1 + target/riscv/pmp.h | 14 ++++++++++++++ target/riscv/csr.c | 24 ++++++++++++++++++++++++ target/riscv/pmp.c | 34 ++++++++++++++++++++++++++++++++++ target/riscv/trace-events | 3 +++ 5 files changed, 76 insertions(+) diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 13a08b86f6..83b315e0b2 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -230,6 +230,7 @@ struct CPURISCVState { =20 /* physical memory protection */ pmp_table_t pmp_state; + target_ulong mseccfg; =20 /* machine specific rdtime callback */ uint64_t (*rdtime_fn)(uint32_t); diff --git a/target/riscv/pmp.h b/target/riscv/pmp.h index b82a30f0d5..a9a0b363a7 100644 --- a/target/riscv/pmp.h +++ b/target/riscv/pmp.h @@ -36,6 +36,12 @@ typedef enum { PMP_AMATCH_NAPOT /* Naturally aligned power-of-two region */ } pmp_am_t; =20 +typedef enum { + MSECCFG_MML =3D 1 << 0, + MSECCFG_MMWP =3D 1 << 1, + MSECCFG_RLB =3D 1 << 2 +} mseccfg_field_t; + typedef struct { target_ulong addr_reg; uint8_t cfg_reg; @@ -55,6 +61,10 @@ typedef struct { void pmpcfg_csr_write(CPURISCVState *env, uint32_t reg_index, target_ulong val); target_ulong pmpcfg_csr_read(CPURISCVState *env, uint32_t reg_index); + +void mseccfg_csr_write(CPURISCVState *env, target_ulong val); +target_ulong mseccfg_csr_read(CPURISCVState *env); + void pmpaddr_csr_write(CPURISCVState *env, uint32_t addr_index, target_ulong val); target_ulong pmpaddr_csr_read(CPURISCVState *env, uint32_t addr_index); @@ -68,4 +78,8 @@ void pmp_update_rule_nums(CPURISCVState *env); uint32_t pmp_get_num_rules(CPURISCVState *env); int pmp_priv_to_page_prot(pmp_priv_t pmp_priv); =20 +#define MSECCFG_MML_ISSET(env) get_field(env->mseccfg, MSECCFG_MML) +#define MSECCFG_MMWP_ISSET(env) get_field(env->mseccfg, MSECCFG_MMWP) +#define MSECCFG_RLB_ISSET(env) get_field(env->mseccfg, MSECCFG_RLB) + #endif diff --git a/target/riscv/csr.c b/target/riscv/csr.c index f0a74f0eb8..97ceff718f 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -200,6 +200,15 @@ static RISCVException pmp(CPURISCVState *env, int csrn= o) =20 return RISCV_EXCP_ILLEGAL_INST; } + +static RISCVException epmp(CPURISCVState *env, int csrno) +{ + if (env->priv =3D=3D PRV_M && riscv_feature(env, RISCV_FEATURE_EPMP)) { + return RISCV_EXCP_NONE; + } + + return RISCV_EXCP_ILLEGAL_INST; +} #endif =20 /* User Floating-Point CSRs */ @@ -1343,6 +1352,20 @@ static RISCVException write_mtinst(CPURISCVState *en= v, int csrno, } =20 /* Physical Memory Protection */ +static RISCVException read_mseccfg(CPURISCVState *env, int csrno, + target_ulong *val) +{ + *val =3D mseccfg_csr_read(env); + return RISCV_EXCP_NONE; +} + +static RISCVException write_mseccfg(CPURISCVState *env, int csrno, + target_ulong val) +{ + mseccfg_csr_write(env, val); + return RISCV_EXCP_NONE; +} + static RISCVException read_pmpcfg(CPURISCVState *env, int csrno, target_ulong *val) { @@ -1581,6 +1604,7 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] =3D { [CSR_MTINST] =3D { "mtinst", hmode, read_mtinst, writ= e_mtinst }, =20 /* Physical Memory Protection */ + [CSR_MSECCFG] =3D { "mseccfg", epmp, read_mseccfg, write_mseccfg }, [CSR_PMPCFG0] =3D { "pmpcfg0", pmp, read_pmpcfg, write_pmpcfg }, [CSR_PMPCFG1] =3D { "pmpcfg1", pmp, read_pmpcfg, write_pmpcfg }, [CSR_PMPCFG2] =3D { "pmpcfg2", pmp, read_pmpcfg, write_pmpcfg }, diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index a3b253bb15..e35988eec2 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -419,6 +419,40 @@ target_ulong pmpaddr_csr_read(CPURISCVState *env, uint= 32_t addr_index) return val; } =20 +/* + * Handle a write to a mseccfg CSR + */ +void mseccfg_csr_write(CPURISCVState *env, target_ulong val) +{ + int i; + + trace_mseccfg_csr_write(env->mhartid, val); + + /* RLB cannot be enabled if it's already 0 and if any regions are lock= ed */ + if (!MSECCFG_RLB_ISSET(env)) { + for (i =3D 0; i < MAX_RISCV_PMPS; i++) { + if (pmp_is_locked(env, i)) { + val &=3D ~MSECCFG_RLB; + break; + } + } + } + + /* Sticky bits */ + val |=3D (env->mseccfg & (MSECCFG_MMWP | MSECCFG_MML)); + + env->mseccfg =3D val; +} + +/* + * Handle a read from a mseccfg CSR + */ +target_ulong mseccfg_csr_read(CPURISCVState *env) +{ + trace_mseccfg_csr_read(env->mhartid, env->mseccfg); + return env->mseccfg; +} + /* * Calculate the TLB size if the start address or the end address of * PMP entry is presented in thie TLB page. diff --git a/target/riscv/trace-events b/target/riscv/trace-events index b7e371ee97..49ec4d3b7d 100644 --- a/target/riscv/trace-events +++ b/target/riscv/trace-events @@ -6,3 +6,6 @@ pmpcfg_csr_read(uint64_t mhartid, uint32_t reg_index, uint6= 4_t val) "hart %" PRI pmpcfg_csr_write(uint64_t mhartid, uint32_t reg_index, uint64_t val) "hart= %" PRIu64 ": write reg%" PRIu32", val: 0x%" PRIx64 pmpaddr_csr_read(uint64_t mhartid, uint32_t addr_index, uint64_t val) "har= t %" PRIu64 ": read addr%" PRIu32", val: 0x%" PRIx64 pmpaddr_csr_write(uint64_t mhartid, uint32_t addr_index, uint64_t val) "ha= rt %" PRIu64 ": write addr%" PRIu32", val: 0x%" PRIx64 + +mseccfg_csr_read(uint64_t mhartid, uint64_t val) "hart %" PRIu64 ": read m= seccfg, val: 0x%" PRIx64 +mseccfg_csr_write(uint64_t mhartid, uint64_t val) "hart %" PRIu64 ": write= mseccfg, val: 0x%" PRIx64 --=20 2.31.1 From nobody Sat May 18 18:27:42 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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Mon, 12 Apr 2021 22:42:45 -0400 Received: from uls-op-cesaip02.wdc.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 13 Apr 2021 10:42:41 +0800 Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Apr 2021 19:22:09 -0700 Received: from unknown (HELO alistair-risc6-laptop.wdc.com) ([10.225.165.16]) by uls-op-cesaip02.wdc.com with ESMTP; 12 Apr 2021 19:42:39 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1618281763; x=1649817763; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Xl1m/1iKNeJ0A7+JnK6xpXTeZOowjbzrcn2KLoPCgTA=; b=eVuLTDOE4pxn6QOskLR9JwZ5tG7lOOC3sUVlqkSmZVM6xZcXE1zOKgPE zOGDw3MuEhYvFC58c9nEj81CBNygDeFG6ocWDC9uUCPXpu873YqG+xVQM wJDnEXdEM6LkfljyHWxq/9spwu/jhN+Bde6bzZOOIvk6y9T9uCJs/vpTi kqBvwtQBd4thZqydLDZekhHMF3i0zdPIclEdnc7c5VbpieA08NTwEy37D xMCM2H48Gqzebv1OZHDI/EPbm9ue1rtiQayVMDh71w/vOTOSkZRKxW17o NO7i1POzfGL/an+P3+ajeJ6Deqn55mWNTxUdbcROmCdXUHB+I2bNmS09i A==; IronPort-SDR: ZqXXCfSDyVdv2tJQ/TukklBeyIywjv26MqCVljZeEzOoR9dcpYApyB7o/dBsmTz5eJoGeBUJda RePCAg4X56CbLS8MxpB89BvmLBTh4XP4Qwf6AcLWuk3oDf52k0dvJ6DgZducL4yd95uJvzjgcD hfkMunxGJHnk/jKE/LG3ecZnzg2fahYPodA+b3YGzcqtLT/jnq88tphO4JjlkQsW9p4/bvZeID tlwiivjQC9uw9Pn/nczXS3NK8mCDz2MQv6nsF59hn3k5i+UcEZM0Vlcahi9blQ8kKQULSiYQko N/0= X-IronPort-AV: E=Sophos;i="5.82,216,1613404800"; d="scan'208";a="169070147" IronPort-SDR: pofKK9fHLjW6Ff9cZCse/SvWaZaRGRrqvmIn8iPumDlEnfSvsXN8c928jOCSVsIwgZPxP1E24U o4nZEdw3SxzJxw9r13i6xHanmwe4J9IrHnWihi2jLiWx42mrELplLM33TFhzbpIGsHElGf85+C haK/jo8WgDd02G0hV5uHwrHAQQWcgWnlrIaMFIxApgMhxLzl5UUZe4r22nIK9beQju0OFWbgbG jwShZXzX2+6Ru/gqFxbU4c4IR/9dwzyFJevHKcQMpeHSzdZGmWlP60mztInl73AE2Sn7jrE8HZ 5WEBSZ3LkN/3G+K4+s/MhtgX IronPort-SDR: UxvY0BrZRNRz4cK1JNGqCePoUhcnpULGeH7MBrc4fXYdlSPaA82eozyyYLhXwmCVw0qspritqv BAIhACNgFiixfQxRUjd+rePDoZZYEpU3PS7HpJWQDOa76o3ofpYefITPnITaR7wRLnsK7konPO Pf1WTs61uLOQtVdvLkpRdfgiJtlrXm96rKikMnum30wiwy18+M0jLOqE82hK8eyYKgFcxvQrcb 07ipl6zhU/RIJASqwrS45c1e130fhQ1fTgfINtcJCrZzV/kBedhwvSSB3gAC6JSyMUyOrCwqHF txw= WDCIronportException: Internal From: Alistair Francis To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [PATCH v3 5/8] target/riscv: Implementation of enhanced PMP (ePMP) Date: Tue, 13 Apr 2021 12:42:32 +1000 Message-Id: <616cef68b75ec06b77847203efaca16f7efaaf18.1618281655.git.alistair.francis@wdc.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.71.153.141; envelope-from=prvs=730c0c5bd=alistair.francis@wdc.com; helo=esa3.hgst.iphmx.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alistair.francis@wdc.com, bmeng.cn@gmail.com, palmer@dabbelt.com, alistair23@gmail.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Hou Weiying This commit adds support for ePMP v0.9.1. The ePMP spec can be found in: https://docs.google.com/document/d/1Mh_aiHYxemL0umN3GTTw8vsbmzHZ_nxZXgjgOUz= bvc8 Signed-off-by: Hongzheng-Li Signed-off-by: Hou Weiying Signed-off-by: Myriad-Dreamin Message-Id: [ Changes by AF: - Rebase on master - Update to latest spec - Use a switch case to handle ePMP MML permissions - Fix a few bugs ] Signed-off-by: Alistair Francis --- target/riscv/pmp.c | 164 +++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 152 insertions(+), 12 deletions(-) diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index e35988eec2..00f91d074f 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -90,11 +90,42 @@ static inline uint8_t pmp_read_cfg(CPURISCVState *env, = uint32_t pmp_index) static void pmp_write_cfg(CPURISCVState *env, uint32_t pmp_index, uint8_t = val) { if (pmp_index < MAX_RISCV_PMPS) { - if (!pmp_is_locked(env, pmp_index)) { - env->pmp_state.pmp[pmp_index].cfg_reg =3D val; - pmp_update_rule(env, pmp_index); + bool locked =3D true; + + if (riscv_feature(env, RISCV_FEATURE_EPMP)) { + /* mseccfg.RLB is set */ + if (MSECCFG_RLB_ISSET(env)) { + locked =3D false; + } + + /* mseccfg.MML is not set */ + if (!MSECCFG_MML_ISSET(env) && !pmp_is_locked(env, pmp_index))= { + locked =3D false; + } + + /* mseccfg.MML is set */ + if (MSECCFG_MML_ISSET(env)) { + /* not adding execute bit */ + if ((val & PMP_LOCK) !=3D 0 && (val & PMP_EXEC) !=3D PMP_E= XEC) { + locked =3D false; + } + /* shared region and not adding X bit */ + if ((val & PMP_LOCK) !=3D PMP_LOCK && + (val & 0x7) !=3D (PMP_WRITE | PMP_EXEC)) { + locked =3D false; + } + } } else { + if (!pmp_is_locked(env, pmp_index)) { + locked =3D false; + } + } + + if (locked) { qemu_log_mask(LOG_GUEST_ERROR, "ignoring pmpcfg write - locked= \n"); + } else { + env->pmp_state.pmp[pmp_index].cfg_reg =3D val; + pmp_update_rule(env, pmp_index); } } else { qemu_log_mask(LOG_GUEST_ERROR, @@ -217,6 +248,32 @@ static bool pmp_hart_has_privs_default(CPURISCVState *= env, target_ulong addr, { bool ret; =20 + if (riscv_feature(env, RISCV_FEATURE_EPMP)) { + if (MSECCFG_MMWP_ISSET(env)) { + /* + * The Machine Mode Whitelist Policy (mseccfg.MMWP) is set + * so we default to deny all, even for M-mode. + */ + *allowed_privs =3D 0; + return false; + } else if (MSECCFG_MML_ISSET(env)) { + /* + * The Machine Mode Lockdown (mseccfg.MML) bit is set + * so we can only execute code in M-mode with an applicable + * rule. Other modes are disabled. + */ + if (mode =3D=3D PRV_M && !(privs & PMP_EXEC)) { + ret =3D true; + *allowed_privs =3D PMP_READ | PMP_WRITE; + } else { + ret =3D false; + *allowed_privs =3D 0; + } + + return ret; + } + } + if ((!riscv_feature(env, RISCV_FEATURE_PMP)) || (mode =3D=3D PRV_M)) { /* * Privileged spec v1.10 states if HW doesn't implement any PMP en= try @@ -294,13 +351,94 @@ bool pmp_hart_has_privs(CPURISCVState *env, target_ul= ong addr, pmp_get_a_field(env->pmp_state.pmp[i].cfg_reg); =20 /* - * If the PMP entry is not off and the address is in range, do the= priv - * check + * Convert the PMP permissions to match the truth table in the + * ePMP spec. */ + const uint8_t epmp_operation =3D + ((env->pmp_state.pmp[i].cfg_reg & PMP_LOCK) >> 4) | + ((env->pmp_state.pmp[i].cfg_reg & PMP_READ) << 2) | + (env->pmp_state.pmp[i].cfg_reg & PMP_WRITE) | + ((env->pmp_state.pmp[i].cfg_reg & PMP_EXEC) >> 2); + if (((s + e) =3D=3D 2) && (PMP_AMATCH_OFF !=3D a_field)) { - *allowed_privs =3D PMP_READ | PMP_WRITE | PMP_EXEC; - if ((mode !=3D PRV_M) || pmp_is_locked(env, i)) { - *allowed_privs &=3D env->pmp_state.pmp[i].cfg_reg; + /* + * If the PMP entry is not off and the address is in range, + * do the priv check + */ + if (!MSECCFG_MML_ISSET(env)) { + /* + * If mseccfg.MML Bit is not set, do pmp priv check + * This will always apply to regular PMP. + */ + *allowed_privs =3D PMP_READ | PMP_WRITE | PMP_EXEC; + if ((mode !=3D PRV_M) || pmp_is_locked(env, i)) { + *allowed_privs &=3D env->pmp_state.pmp[i].cfg_reg; + } + } else { + /* + * If mseccfg.MML Bit set, do the enhanced pmp priv check + */ + if (mode =3D=3D PRV_M) { + switch (epmp_operation) { + case 0: + case 1: + case 4: + case 5: + case 6: + case 7: + case 8: + *allowed_privs =3D 0; + break; + case 2: + case 3: + case 14: + *allowed_privs =3D PMP_READ | PMP_WRITE; + break; + case 9: + case 10: + *allowed_privs =3D PMP_EXEC; + break; + case 11: + case 13: + *allowed_privs =3D PMP_READ | PMP_EXEC; + break; + case 12: + case 15: + *allowed_privs =3D PMP_READ; + break; + } + } else { + switch (epmp_operation) { + case 0: + case 8: + case 9: + case 12: + case 13: + case 14: + *allowed_privs =3D 0; + break; + case 1: + case 10: + case 11: + *allowed_privs =3D PMP_EXEC; + break; + case 2: + case 4: + case 15: + *allowed_privs =3D PMP_READ; + break; + case 3: + case 6: + *allowed_privs =3D PMP_READ | PMP_WRITE; + break; + case 5: + *allowed_privs =3D PMP_READ | PMP_EXEC; + break; + case 7: + *allowed_privs =3D PMP_READ | PMP_WRITE | PMP_EXEC; + break; + } + } } =20 ret =3D ((privs & *allowed_privs) =3D=3D privs); @@ -328,10 +466,12 @@ void pmpcfg_csr_write(CPURISCVState *env, uint32_t re= g_index, =20 trace_pmpcfg_csr_write(env->mhartid, reg_index, val); =20 - if ((reg_index & 1) && (sizeof(target_ulong) =3D=3D 8)) { - qemu_log_mask(LOG_GUEST_ERROR, - "ignoring pmpcfg write - incorrect address\n"); - return; + if (!riscv_feature(env, RISCV_FEATURE_EPMP) || !MSECCFG_RLB_ISSET(env)= ) { + if ((reg_index & 1) && (sizeof(target_ulong) =3D=3D 8)) { + qemu_log_mask(LOG_GUEST_ERROR, + "ignoring pmpcfg write - PMP config is locked\n"= ); + return; + } } =20 for (i =3D 0; i < sizeof(target_ulong); i++) { --=20 2.31.1 From nobody Sat May 18 18:27:42 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail header.i=@wdc.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=wdc.com ARC-Seal: i=1; a=rsa-sha256; t=1618281844; cv=none; d=zohomail.com; s=zohoarc; b=nMFOBD++wJ4S4JtZMM8CAoZYYaA4GFfKJoqWU+cDEULy/MkEbniniAMNZYHOSgslTZWdVNx11LOmPXsjfCcTJL32qXy8YXbH95cHHS0Wcqww/U6tw4mhI49DFg/dJ3M+eIcjnsze5t7J8DTRSzWis1yZhMZ42BsJMZMChUsJQFU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1618281844; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=Gdhn/oTaJconIPq4nHe09wD3soWr4CUt8PjEa+R2YfM=; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.71.153.141; envelope-from=prvs=730c0c5bd=alistair.francis@wdc.com; helo=esa3.hgst.iphmx.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alistair.francis@wdc.com, bmeng.cn@gmail.com, palmer@dabbelt.com, alistair23@gmail.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Hou Weiying Add a config option to enable experimental support for ePMP. This is disabled by default and can be enabled with 'x-epmp=3Dtrue'. Signed-off-by: Hongzheng-Li Signed-off-by: Hou Weiying Signed-off-by: Myriad-Dreamin Message-Id: Signed-off-by: Alistair Francis Reviewed-by: Bin Meng --- target/riscv/cpu.h | 1 + target/riscv/cpu.c | 10 ++++++++++ 2 files changed, 11 insertions(+) diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 83b315e0b2..add734bbbd 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -304,6 +304,7 @@ struct RISCVCPU { uint16_t elen; bool mmu; bool pmp; + bool epmp; uint64_t resetvec; } cfg; }; diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index e530df9385..66787d019c 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -412,6 +412,14 @@ static void riscv_cpu_realize(DeviceState *dev, Error = **errp) =20 if (cpu->cfg.pmp) { set_feature(env, RISCV_FEATURE_PMP); + + /* + * Enhanced PMP should only be available + * on harts with PMP support + */ + if (cpu->cfg.epmp) { + set_feature(env, RISCV_FEATURE_EPMP); + } } =20 set_resetvec(env, cpu->cfg.resetvec); @@ -554,6 +562,8 @@ static Property riscv_cpu_properties[] =3D { DEFINE_PROP_UINT16("elen", RISCVCPU, cfg.elen, 64), DEFINE_PROP_BOOL("mmu", RISCVCPU, cfg.mmu, true), DEFINE_PROP_BOOL("pmp", RISCVCPU, cfg.pmp, true), + DEFINE_PROP_BOOL("x-epmp", RISCVCPU, cfg.epmp, false), + DEFINE_PROP_UINT64("resetvec", RISCVCPU, cfg.resetvec, DEFAULT_RSTVEC), DEFINE_PROP_END_OF_LIST(), }; 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IronPort-SDR: gQfPWEWAOfhpBSGY3BgNMo1Tbc1GD5qTMG96AH3jZHHgGSHZEiEPut8p2ZgonugF3g/DI4SgVM adB6Y9jVkt4n1xjbKpSMO/AOxGPAdXfK/6D26p+lRvCClqNW2gYrWT9wXlwt8rHhYOuTu1r+pX ao9JBYWchdCeOqmQgATYojR5TnPolYWwfxInjrUWflhTeSnrHEnzV6w23grA/J9LlNO6EXTGfz q4JJYCn+mXZC8ozy8plEHswQAfKPTSK1n23qjoDgZqgISMh9AadP2ZDjsC0mVy5wBadbx4//SQ OEg= X-IronPort-AV: E=Sophos;i="5.82,216,1613404800"; d="scan'208";a="164190777" IronPort-SDR: tJjUTFUaZtvsDsSzUXaSi5+/47g6MaBKMOwxyEmf0j/hiYx1aPLW6wlIN7QZM3nOQRU7KoFv7w RdchI4XMJGbieuYiy7+Yvb90w8E3SjY+C8E+eM3tzJA+D53OmpeiZl1SYTkf3GRCn396SMYg55 AVpxU9bB011DlbGkIptIZKAjlom+DC1wRQcXDDjAcA8NS/Z+xFgGTlJw1JmC+vpA5HByvGLQgM RRrrfehSlUchjBJt9DzroK919lPO6clLaPa1pHLuYkgFuSLSBKFrMXP5zNULdqDoP7MMcQfOB6 KumDNez4FsI5h3nI0pUNyTOL IronPort-SDR: o+THx8Iihq1UAAr+Pe9D5Jc6oIclxKQSq+0Ls47/qofz/5xDbRgO/S9wv/f3om7LY7VxpEfLVn rPly1ExR+k2qJiH+cnPs6wJOUt80c639in6lX/dvueUY6ouIQXsHt/zssY39oz0v7u6nTieibA pYWGgmlRmoyjviOL6wrPkj6hc+PPkq190VjrSck6IEJIsjE7G8XQFS3B2A40x41FCP/Ca0TfpP jl0e/08rra4GlgLloeLJmusIt1TX9Qqm/h5PbfGO2vaLg4cOQW5AfYn7Vl3Z6ztALTcsCJWJt0 DFE= WDCIronportException: Internal From: Alistair Francis To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [PATCH v3 7/8] target/riscv/pmp: Remove outdated comment Date: Tue, 13 Apr 2021 12:42:57 +1000 Message-Id: <433d23e16bd941b209d433263aa8020b9efbf669.1618281655.git.alistair.francis@wdc.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.71.154.42; envelope-from=prvs=730c0c5bd=alistair.francis@wdc.com; helo=esa4.hgst.iphmx.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alistair.francis@wdc.com, bmeng.cn@gmail.com, palmer@dabbelt.com, alistair23@gmail.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Signed-off-by: Alistair Francis Reviewed-by: Bin Meng --- target/riscv/pmp.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index 00f91d074f..68be893e16 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -19,10 +19,6 @@ * this program. If not, see . */ =20 -/* - * PMP (Physical Memory Protection) is as-of-yet unused and needs testing. - */ - #include "qemu/osdep.h" #include "qemu/log.h" #include "qapi/error.h" --=20 2.31.1 From nobody Sat May 18 18:27:42 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail header.i=@wdc.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=wdc.com ARC-Seal: i=1; a=rsa-sha256; t=1618282110; cv=none; d=zohomail.com; s=zohoarc; b=VCLIe8aseOsVxAKbxSv2Pw1xm/p2Z+7ymyk3els7YCZot2vmgH7IrcXP+wIYDVmN3O70CnXIGkdURbMUB/kqFw3Gu/DAN34p0q2EsOI5r3qduEJdPYf2zJywZ6+BJ3/ECopYSRDj4ZadkOKEMjY3hynjhGeJjEgnoMdZtu0pMMc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1618282110; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.71.153.144; envelope-from=prvs=730c0c5bd=alistair.francis@wdc.com; helo=esa5.hgst.iphmx.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alistair.francis@wdc.com, bmeng.cn@gmail.com, palmer@dabbelt.com, alistair23@gmail.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" The physical Ibex CPU has ePMP support and it's enabled for the OpenTitan machine so let's enable ePMP support for the Ibex CPU in QEMU. Signed-off-by: Alistair Francis Reviewed-by: Bin Meng --- target/riscv/cpu.c | 1 + 1 file changed, 1 insertion(+) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 66787d019c..4bf6a00636 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -202,6 +202,7 @@ static void rv32_ibex_cpu_init(Object *obj) set_misa(env, RV32 | RVI | RVM | RVC | RVU); set_priv_version(env, PRIV_VERSION_1_10_0); qdev_prop_set_bit(DEVICE(obj), "mmu", false); + qdev_prop_set_bit(DEVICE(obj), "x-epmp", true); } =20 static void rv32_imafcu_nommu_cpu_init(Object *obj) --=20 2.31.1