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Wed, 20 Mar 2024 10:19:03 -0700 (PDT) From: Alexey Baturo X-Google-Original-From: Alexey Baturo To: Cc: baturo.alexey@gmail.com, richard.henderson@linaro.org, space.monkey.delivers@gmail.com, palmer@dabbelt.com, Alistair.Francis@wdc.com, sagark@eecs.berkeley.edu, kbastian@mail.uni-paderborn.de, qemu-devel@nongnu.org, qemu-riscv@nongnu.org, Alistair Francis Subject: [PATCH v8 2/6] target/riscv: Add new CSR fields for S{sn, mn, m}pm extensions as part of Zjpm v0.8 Date: Wed, 20 Mar 2024 20:18:46 +0300 Message-Id: <20240320171850.1197824-3-me@deliversmonkey.space> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240320171850.1197824-1-me@deliversmonkey.space> References: <20240320171850.1197824-1-me@deliversmonkey.space> 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=2a00:1450:4864:20::632; envelope-from=baturo.alexey@gmail.com; helo=mail-ej1-x632.google.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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1710955208743100003 Content-Type: text/plain; charset="utf-8" From: Alexey Baturo Signed-off-by: Alexey Baturo Reviewed-by: Alistair Francis --- target/riscv/cpu.h | 8 ++++++++ target/riscv/cpu_bits.h | 3 +++ target/riscv/cpu_cfg.h | 3 +++ target/riscv/csr.c | 11 +++++++++++ target/riscv/machine.c | 10 +++++++--- target/riscv/pmp.c | 13 ++++++++++--- target/riscv/pmp.h | 11 ++++++----- 7 files changed, 48 insertions(+), 11 deletions(-) diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index cfad5281a1..b694cc62bf 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -123,6 +123,14 @@ typedef enum { EXT_STATUS_DIRTY, } RISCVExtStatus; =20 +/* Enum holds PMM field values for Zjpm v0.8 extension */ +typedef enum { + PMM_FIELD_DISABLED =3D 0, + PMM_FIELD_RESERVED =3D 1, + PMM_FIELD_PMLEN7 =3D 2, + PMM_FIELD_PMLEN16 =3D 3, +} RISCVPmPmm; + #define MMU_USER_IDX 3 =20 #define MAX_RISCV_PMPS (16) diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index 5098d2d613..e9e6e1f952 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -708,6 +708,7 @@ typedef enum RISCVException { #define MENVCFG_CBIE (3UL << 4) #define MENVCFG_CBCFE BIT(6) #define MENVCFG_CBZE BIT(7) +#define MENVCFG_PMM (3ULL << 32) #define MENVCFG_ADUE (1ULL << 61) #define MENVCFG_PBMTE (1ULL << 62) #define MENVCFG_STCE (1ULL << 63) @@ -721,11 +722,13 @@ typedef enum RISCVException { #define SENVCFG_CBIE MENVCFG_CBIE #define SENVCFG_CBCFE MENVCFG_CBCFE #define SENVCFG_CBZE MENVCFG_CBZE +#define SENVCFG_PMM MENVCFG_PMM =20 #define HENVCFG_FIOM MENVCFG_FIOM #define HENVCFG_CBIE MENVCFG_CBIE #define HENVCFG_CBCFE MENVCFG_CBCFE #define HENVCFG_CBZE MENVCFG_CBZE +#define HENVCFG_PMM MENVCFG_PMM #define HENVCFG_ADUE MENVCFG_ADUE #define HENVCFG_PBMTE MENVCFG_PBMTE #define HENVCFG_STCE MENVCFG_STCE diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h index 2040b90da0..963de724c2 100644 --- a/target/riscv/cpu_cfg.h +++ b/target/riscv/cpu_cfg.h @@ -118,6 +118,9 @@ struct RISCVCPUConfig { bool ext_ssaia; bool ext_sscofpmf; bool ext_smepmp; + bool ext_ssnpm; + bool ext_smnpm; + bool ext_smmpm; bool rvv_ta_all_1s; bool rvv_ma_all_1s; =20 diff --git a/target/riscv/csr.c b/target/riscv/csr.c index ffb5a1102e..69c0279c12 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -530,6 +530,9 @@ static RISCVException have_mseccfg(CPURISCVState *env, = int csrno) if (riscv_cpu_cfg(env)->ext_zkr) { return RISCV_EXCP_NONE; } + if (riscv_cpu_cfg(env)->ext_smmpm) { + return RISCV_EXCP_NONE; + } =20 return RISCV_EXCP_ILLEGAL_INST; } @@ -2080,6 +2083,10 @@ static RISCVException write_menvcfg(CPURISCVState *e= nv, int csrno, (cfg->ext_sstc ? MENVCFG_STCE : 0) | (cfg->ext_svadu ? MENVCFG_ADUE : 0); } + /* Update PMM field only if the value is valid according to Zjpm v0.8 = */ + if (((val & MENVCFG_PMM) >> 32) !=3D PMM_FIELD_RESERVED) { + mask |=3D MENVCFG_PMM; + } env->menvcfg =3D (env->menvcfg & ~mask) | (val & mask); =20 return RISCV_EXCP_NONE; @@ -2124,6 +2131,10 @@ static RISCVException write_senvcfg(CPURISCVState *e= nv, int csrno, target_ulong val) { uint64_t mask =3D SENVCFG_FIOM | SENVCFG_CBIE | SENVCFG_CBCFE | SENVCF= G_CBZE; + /* Update PMM field only if the value is valid according to Zjpm v0.8 = */ + if (((val & SENVCFG_PMM) >> 32) !=3D PMM_FIELD_RESERVED) { + mask |=3D SENVCFG_PMM; + } RISCVException ret; =20 ret =3D smstateen_acc_ok(env, 0, SMSTATEEN0_HSENVCFG); diff --git a/target/riscv/machine.c b/target/riscv/machine.c index 64ab66e332..bbbb28f373 100644 --- a/target/riscv/machine.c +++ b/target/riscv/machine.c @@ -152,15 +152,19 @@ static const VMStateDescription vmstate_vector =3D { =20 static bool pointermasking_needed(void *opaque) { - return false; + RISCVCPU *cpu =3D opaque; + return cpu->cfg.ext_ssnpm || cpu->cfg.ext_smnpm || cpu->cfg.ext_smmpm; } =20 static const VMStateDescription vmstate_pointermasking =3D { .name =3D "cpu/pointer_masking", - .version_id =3D 1, - .minimum_version_id =3D 1, + .version_id =3D 2, + .minimum_version_id =3D 2, .needed =3D pointermasking_needed, .fields =3D (const VMStateField[]) { + VMSTATE_UINTTL(env.mseccfg, RISCVCPU), + VMSTATE_UINTTL(env.senvcfg, RISCVCPU), + VMSTATE_UINTTL(env.menvcfg, RISCVCPU), VMSTATE_END_OF_LIST() } }; diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index 2a76b611a0..7ddb9dbf0b 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -574,6 +574,12 @@ target_ulong pmpaddr_csr_read(CPURISCVState *env, uint= 32_t addr_index) void mseccfg_csr_write(CPURISCVState *env, target_ulong val) { int i; + uint64_t mask =3D MSECCFG_MMWP | MSECCFG_MML; + + /* Update PMM field only if the value is valid according to Zjpm v0.8 = */ + if (((val & MSECCFG_PMM) >> 32) !=3D PMM_FIELD_RESERVED) { + mask |=3D MSECCFG_PMM; + } =20 trace_mseccfg_csr_write(env->mhartid, val); =20 @@ -589,12 +595,13 @@ void mseccfg_csr_write(CPURISCVState *env, target_ulo= ng val) =20 if (riscv_cpu_cfg(env)->ext_smepmp) { /* Sticky bits */ - val |=3D (env->mseccfg & (MSECCFG_MMWP | MSECCFG_MML)); - if ((val ^ env->mseccfg) & (MSECCFG_MMWP | MSECCFG_MML)) { + val |=3D (env->mseccfg & mask); + if ((val ^ env->mseccfg) & mask) { tlb_flush(env_cpu(env)); } } else { - val &=3D ~(MSECCFG_MMWP | MSECCFG_MML | MSECCFG_RLB); + mask |=3D MSECCFG_RLB; + val &=3D ~(mask); } =20 env->mseccfg =3D val; diff --git a/target/riscv/pmp.h b/target/riscv/pmp.h index f5c10ce85c..ccff0eb9b6 100644 --- a/target/riscv/pmp.h +++ b/target/riscv/pmp.h @@ -40,11 +40,12 @@ typedef enum { } pmp_am_t; =20 typedef enum { - MSECCFG_MML =3D 1 << 0, - MSECCFG_MMWP =3D 1 << 1, - MSECCFG_RLB =3D 1 << 2, - MSECCFG_USEED =3D 1 << 8, - MSECCFG_SSEED =3D 1 << 9 + MSECCFG_MML =3D 1 << 0, + MSECCFG_MMWP =3D 1 << 1, + MSECCFG_RLB =3D 1 << 2, + MSECCFG_USEED =3D 1 << 8, + MSECCFG_SSEED =3D 1 << 9, + MSECCFG_PMM =3D 3UL << 32, } mseccfg_field_t; =20 typedef struct { --=20 2.34.1