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Wed, 26 Feb 2025 14:40:08 +0000 Received: from PAZP264MB2990.FRAP264.PROD.OUTLOOK.COM ([fe80::ef1:e8a1:244f:3ca7]) by PAZP264MB2990.FRAP264.PROD.OUTLOOK.COM ([fe80::ef1:e8a1:244f:3ca7%5]) with mapi id 15.20.8489.018; Wed, 26 Feb 2025 14:40:08 +0000 From: Florian Lugou To: qemu-devel@nongnu.org Cc: Florian Lugou , Palmer Dabbelt , Alistair Francis , Bin Meng , Weiwei Li , Daniel Henrique Barboza , Liu Zhiwei , qemu-riscv@nongnu.org Subject: [PATCH 2/2] target/riscv: Support matching scontext in Sdtrig's textra CSRs Date: Wed, 26 Feb 2025 15:39:14 +0100 Message-ID: <20250226143914.769112-3-florian.lugou@provenrun.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250226143914.769112-1-florian.lugou@provenrun.com> References: <20250226143914.769112-1-florian.lugou@provenrun.com> X-ClientProxiedBy: PA7P264CA0019.FRAP264.PROD.OUTLOOK.COM (2603:10a6:102:2df::15) To PAZP264MB2990.FRAP264.PROD.OUTLOOK.COM (2603:10a6:102:1f2::18) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PAZP264MB2990:EE_|MR0P264MB5513:EE_ X-MS-Office365-Filtering-Correlation-Id: 1f2c3a0c-78a1-4206-cb8c-08dd56737748 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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envelope-from=florian.lugou@provenrun.com; helo=PAUP264CU001.outbound.protection.outlook.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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Support setting textra32.sselect or textra64.sselect to 1 (scontext). The trigger will only match if the content of scontext matches the value in svalue, after it is masked as configured in sbytemask. Signed-off-by: Florian Lugou --- target/riscv/debug.c | 75 +++++++++++++++++++++++++++++++------------- target/riscv/debug.h | 3 ++ 2 files changed, 57 insertions(+), 21 deletions(-) diff --git a/target/riscv/debug.c b/target/riscv/debug.c index 914a9ce0f8..ac9752d30e 100644 --- a/target/riscv/debug.c +++ b/target/riscv/debug.c @@ -219,8 +219,8 @@ static inline void warn_always_zero_bit(target_ulong val, target_ulong mask, static target_ulong textra_validate(CPURISCVState *env, target_ulong tdata3) { - target_ulong mhvalue, mhselect; - target_ulong mhselect_new; + target_ulong mhvalue, mhselect, sbytemask, svalue, sselect; + target_ulong mhselect_new, sselect_new; target_ulong textra; const uint32_t mhselect_no_rvh[8] = { 0, 0, 0, 0, 4, 4, 4, 4 }; @@ -228,25 +228,17 @@ static target_ulong textra_validate(CPURISCVState *env, target_ulong tdata3) case MXL_RV32: mhvalue = get_field(tdata3, TEXTRA32_MHVALUE); mhselect = get_field(tdata3, TEXTRA32_MHSELECT); - /* Validate unimplemented (always zero) bits */ - warn_always_zero_bit(tdata3, (target_ulong)TEXTRA32_SBYTEMASK, - "sbytemask"); - warn_always_zero_bit(tdata3, (target_ulong)TEXTRA32_SVALUE, - "svalue"); - warn_always_zero_bit(tdata3, (target_ulong)TEXTRA32_SSELECT, - "sselect"); + sbytemask = get_field(tdata3, TEXTRA32_SBYTEMASK); + svalue = get_field(tdata3, TEXTRA32_SVALUE); + sselect = get_field(tdata3, TEXTRA32_SSELECT); break; case MXL_RV64: case MXL_RV128: mhvalue = get_field(tdata3, TEXTRA64_MHVALUE); mhselect = get_field(tdata3, TEXTRA64_MHSELECT); - /* Validate unimplemented (always zero) bits */ - warn_always_zero_bit(tdata3, (target_ulong)TEXTRA64_SBYTEMASK, - "sbytemask"); - warn_always_zero_bit(tdata3, (target_ulong)TEXTRA64_SVALUE, - "svalue"); - warn_always_zero_bit(tdata3, (target_ulong)TEXTRA64_SSELECT, - "sselect"); + sbytemask = get_field(tdata3, TEXTRA64_SBYTEMASK); + svalue = get_field(tdata3, TEXTRA64_SVALUE); + sselect = get_field(tdata3, TEXTRA64_SSELECT); break; default: g_assert_not_reached(); @@ -258,17 +250,34 @@ static target_ulong textra_validate(CPURISCVState *env, target_ulong tdata3) qemu_log_mask(LOG_UNIMP, "mhselect only supports 0 or 4 for now\n"); } + /* Validate sselect. */ + switch (sselect) { + case SSELECT_IGNORE: + case SSELECT_SCONTEXT: + sselect_new = sselect; + break; + default: + sselect_new = 0; + qemu_log_mask(LOG_UNIMP, "sselect only supports 0 or 1 for now\n"); + } + /* Write legal values into textra */ textra = 0; switch (riscv_cpu_mxl(env)) { case MXL_RV32: - textra = set_field(textra, TEXTRA32_MHVALUE, mhvalue); - textra = set_field(textra, TEXTRA32_MHSELECT, mhselect_new); + textra = set_field(textra, TEXTRA32_MHVALUE, mhvalue); + textra = set_field(textra, TEXTRA32_MHSELECT, mhselect_new); + textra = set_field(textra, TEXTRA32_SBYTEMASK, sbytemask); + textra = set_field(textra, TEXTRA32_SVALUE, svalue); + textra = set_field(textra, TEXTRA32_SSELECT, sselect_new); break; case MXL_RV64: case MXL_RV128: - textra = set_field(textra, TEXTRA64_MHVALUE, mhvalue); - textra = set_field(textra, TEXTRA64_MHSELECT, mhselect_new); + textra = set_field(textra, TEXTRA64_MHVALUE, mhvalue); + textra = set_field(textra, TEXTRA64_MHSELECT, mhselect_new); + textra = set_field(textra, TEXTRA64_SBYTEMASK, sbytemask); + textra = set_field(textra, TEXTRA64_SVALUE, svalue); + textra = set_field(textra, TEXTRA64_SSELECT, sselect_new); break; default: g_assert_not_reached(); @@ -368,7 +377,7 @@ static bool trigger_textra_match(CPURISCVState *env, trigger_type_t type, int trigger_index) { target_ulong textra = env->tdata3[trigger_index]; - target_ulong mhvalue, mhselect; + target_ulong mhvalue, mhselect, sbytemask, svalue, sselect; if (type < TRIGGER_TYPE_AD_MATCH || type > TRIGGER_TYPE_AD_MATCH6) { /* textra checking is only applicable when type is 2, 3, 4, 5, or 6 */ @@ -379,11 +388,17 @@ static bool trigger_textra_match(CPURISCVState *env, trigger_type_t type, case MXL_RV32: mhvalue = get_field(textra, TEXTRA32_MHVALUE); mhselect = get_field(textra, TEXTRA32_MHSELECT); + sbytemask = get_field(textra, TEXTRA32_SBYTEMASK); + svalue = get_field(textra, TEXTRA32_SVALUE); + sselect = get_field(textra, TEXTRA32_SSELECT); break; case MXL_RV64: case MXL_RV128: mhvalue = get_field(textra, TEXTRA64_MHVALUE); mhselect = get_field(textra, TEXTRA64_MHSELECT); + sbytemask = get_field(textra, TEXTRA64_SBYTEMASK); + svalue = get_field(textra, TEXTRA64_SVALUE); + sselect = get_field(textra, TEXTRA64_SSELECT); break; default: g_assert_not_reached(); @@ -403,6 +418,24 @@ static bool trigger_textra_match(CPURISCVState *env, trigger_type_t type, break; } + target_ulong svalue_mask = ((sbytemask & 1) * 0xFF) | + ((sbytemask & 2) * 0x7F80) | ((sbytemask & 4) * 0x3FC000) | + ((sbytemask & 8) * 0x1FE00000); + + /* Check svalue and sselect. */ + switch (sselect) { + case SSELECT_IGNORE: + break; + case SSELECT_SCONTEXT: + /* Match if the low bits of scontext equal svalue. */ + if ((svalue & svalue_mask) != (env->scontext & svalue_mask)) { + return false; + } + break; + default: + break; + } + return true; } diff --git a/target/riscv/debug.h b/target/riscv/debug.h index f76b8f944a..16b66441ca 100644 --- a/target/riscv/debug.h +++ b/target/riscv/debug.h @@ -134,6 +134,9 @@ enum { #define MHSELECT_IGNORE 0 #define MHSELECT_MCONTEXT 4 +#define SSELECT_IGNORE 0 +#define SSELECT_SCONTEXT 1 + bool tdata_available(CPURISCVState *env, int tdata_index); target_ulong tselect_csr_read(CPURISCVState *env);