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[98.150.199.49]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-24011d5bcbesm3908065ad.10.2025.07.27.01.07.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Jul 2025 01:07:05 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org Subject: [PATCH 56/82] target/arm: Implement GCSPUSHM Date: Sat, 26 Jul 2025 22:02:28 -1000 Message-ID: <20250727080254.83840-57-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250727080254.83840-1-richard.henderson@linaro.org> References: <20250727080254.83840-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::62c; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x62c.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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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 Signed-off-by: Richard Henderson --- target/arm/cpregs.h | 3 +++ target/arm/cpregs-gcs.c | 16 ++++++++++++++++ target/arm/tcg/translate-a64.c | 18 ++++++++++++++++++ 3 files changed, 37 insertions(+) diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h index 15894332b2..93358e6123 100644 --- a/target/arm/cpregs.h +++ b/target/arm/cpregs.h @@ -46,6 +46,8 @@ enum { ARM_CP_DC_ZVA = 0x0005, ARM_CP_DC_GVA = 0x0006, ARM_CP_DC_GZVA = 0x0007, + /* Special: gcs instructions */ + ARM_CP_GCSPUSHM = 0x0008, /* Flag: reads produce resetvalue; writes ignored. */ ARM_CP_CONST = 1 << 4, @@ -861,6 +863,7 @@ typedef enum FGTBit { DO_BIT(HFGITR, DVPRCTX), DO_BIT(HFGITR, CPPRCTX), DO_BIT(HFGITR, DCCVAC), + DO_REV_BIT(HFGITR, NGCSPUSHM_EL1), DO_BIT(HFGITR, ATS1E1A), } FGTBit; diff --git a/target/arm/cpregs-gcs.c b/target/arm/cpregs-gcs.c index 9c06100d2b..38987372c9 100644 --- a/target/arm/cpregs-gcs.c +++ b/target/arm/cpregs-gcs.c @@ -33,6 +33,17 @@ static CPAccessResult access_gcs_el0(CPUARMState *env, const ARMCPRegInfo *ri, return access_gcs(env, ri, isread); } +static CPAccessResult access_gcspushm(CPUARMState *env, const ARMCPRegInfo *ri, + bool isread) +{ + int el = arm_current_el(env); + + if (!(env->cp15.gcscr_el[el] & GCSCR_PUSHMEN)) { + return CP_ACCESS_TRAP_BIT | (el ? el : 1); + } + return CP_ACCESS_OK; +} + static const ARMCPRegInfo gcs_reginfo[] = { { .name = "GCSCRE0_EL1", .state = ARM_CP_STATE_AA64, .opc0 = 3, .opc1 = 0, .crn = 2, .crm = 5, .opc2 = 2, @@ -69,6 +80,11 @@ static const ARMCPRegInfo gcs_reginfo[] = { .opc0 = 3, .opc1 = 6, .crn = 2, .crm = 5, .opc2 = 1, .access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.gcspr_el[2]) }, + + { .name = "GCSPUSHM", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 7, .opc2 = 0, + .access = PL0_W, .accessfn = access_gcspushm, + .fgt = FGT_NGCSPUSHM_EL1, .type = ARM_CP_GCSPUSHM }, }; void define_gcs_cpregs(ARMCPU *cpu) diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c index 45ff7bb0b2..a5810be2f7 100644 --- a/target/arm/tcg/translate-a64.c +++ b/target/arm/tcg/translate-a64.c @@ -420,6 +420,19 @@ static MemOp check_ordered_align(DisasContext *s, int rn, int imm, return finalize_memop(s, mop); } +static void gen_add_gcs_record(DisasContext *s, TCGv_i64 value) +{ + TCGv_i64 addr = tcg_temp_new_i64(); + int sp_off = offsetof(CPUARMState, cp15.gcspr_el[s->current_el]); + int mmuidx = core_gcs_mem_index(s->mmu_idx); + MemOp mop = finalize_memop(s, MO_64 | MO_ALIGN); + + tcg_gen_ld_i64(addr, tcg_env, sp_off); + tcg_gen_addi_i64(addr, addr, -8); + tcg_gen_qemu_st_i64(value, clean_data_tbi(s, addr), mmuidx, mop); + tcg_gen_st_i64(addr, tcg_env, sp_off); +} + typedef struct DisasCompare64 { TCGCond cond; TCGv_i64 value; @@ -2765,6 +2778,11 @@ static void handle_sys(DisasContext *s, bool isread, } } return; + case ARM_CP_GCSPUSHM: + if (s->gcs_en) { + gen_add_gcs_record(s, cpu_reg(s, rt)); + } + return; default: g_assert_not_reached(); } -- 2.43.0