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[70.228.75.190]) by smtp.gmail.com with ESMTPSA id r38sm2315588otv.72.2022.02.18.16.25.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Feb 2022 16:25:40 -0800 (PST) From: Atish Patra To: qemu-devel@nongnu.org Subject: [PATCH v5 05/12] target/riscv: Implement mcountinhibit CSR Date: Fri, 18 Feb 2022 16:25:11 -0800 Message-Id: <20220219002518.1936806-6-atishp@rivosinc.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220219002518.1936806-1-atishp@rivosinc.com> References: <20220219002518.1936806-1-atishp@rivosinc.com> MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::c2e (failed) Received-SPF: pass client-ip=2607:f8b0:4864:20::c2e; envelope-from=atishp@rivosinc.com; helo=mail-oo1-xc2e.google.com X-Spam_score_int: -4 X-Spam_score: -0.5 X-Spam_bar: / X-Spam_report: (-0.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, PDS_HP_HELO_NORDNS=0.659, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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: qemu-riscv@nongnu.org, Bin Meng , Atish Patra , Alistair Francis , Palmer Dabbelt , Bin Meng Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Atish Patra As per the privilege specification v1.11, mcountinhibit allows to start/stop a pmu counter selectively. Reviewed-by: Bin Meng Reviewed-by: Alistair Francis Signed-off-by: Atish Patra Signed-off-by: Atish Patra --- target/riscv/cpu.h | 2 ++ target/riscv/cpu_bits.h | 4 ++++ target/riscv/csr.c | 25 +++++++++++++++++++++++++ target/riscv/machine.c | 1 + 4 files changed, 32 insertions(+) diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index f6b994a74ed9..ea3862ccbf5c 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -259,6 +259,8 @@ struct CPURISCVState { target_ulong scounteren; target_ulong mcounteren; + target_ulong mcountinhibit; + target_ulong sscratch; target_ulong mscratch; diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index bb47cf7e77a2..48b39e6d52a7 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -367,6 +367,10 @@ #define CSR_MHPMCOUNTER29 0xb1d #define CSR_MHPMCOUNTER30 0xb1e #define CSR_MHPMCOUNTER31 0xb1f + +/* Machine counter-inhibit register */ +#define CSR_MCOUNTINHIBIT 0x320 + #define CSR_MHPMEVENT3 0x323 #define CSR_MHPMEVENT4 0x324 #define CSR_MHPMEVENT5 0x325 diff --git a/target/riscv/csr.c b/target/riscv/csr.c index d69bd2d88454..2283ff33a5d7 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -1379,6 +1379,28 @@ static RISCVException write_mtvec(CPURISCVState *env, int csrno, return RISCV_EXCP_NONE; } +static RISCVException read_mcountinhibit(CPURISCVState *env, int csrno, + target_ulong *val) +{ + if (env->priv_ver < PRIV_VERSION_1_11_0) { + return RISCV_EXCP_ILLEGAL_INST; + } + + *val = env->mcountinhibit; + return RISCV_EXCP_NONE; +} + +static RISCVException write_mcountinhibit(CPURISCVState *env, int csrno, + target_ulong val) +{ + if (env->priv_ver < PRIV_VERSION_1_11_0) { + return RISCV_EXCP_ILLEGAL_INST; + } + + env->mcountinhibit = val; + return RISCV_EXCP_NONE; +} + static RISCVException read_mcounteren(CPURISCVState *env, int csrno, target_ulong *val) { @@ -3553,6 +3575,9 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = { [CSR_MHPMCOUNTER30] = { "mhpmcounter30", mctr, read_zero }, [CSR_MHPMCOUNTER31] = { "mhpmcounter31", mctr, read_zero }, + [CSR_MCOUNTINHIBIT] = { "mcountinhibit", any, read_mcountinhibit, + write_mcountinhibit }, + [CSR_MHPMEVENT3] = { "mhpmevent3", any, read_zero }, [CSR_MHPMEVENT4] = { "mhpmevent4", any, read_zero }, [CSR_MHPMEVENT5] = { "mhpmevent5", any, read_zero }, diff --git a/target/riscv/machine.c b/target/riscv/machine.c index ebc33c9e2781..a34cc3f69c4b 100644 --- a/target/riscv/machine.c +++ b/target/riscv/machine.c @@ -299,6 +299,7 @@ const VMStateDescription vmstate_riscv_cpu = { VMSTATE_UINTTL(env.siselect, RISCVCPU), VMSTATE_UINTTL(env.scounteren, RISCVCPU), VMSTATE_UINTTL(env.mcounteren, RISCVCPU), + VMSTATE_UINTTL(env.mcountinhibit, RISCVCPU), VMSTATE_UINTTL(env.sscratch, RISCVCPU), VMSTATE_UINTTL(env.mscratch, RISCVCPU), VMSTATE_UINT64(env.mfromhost, RISCVCPU),