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[174.21.67.243]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7490a49ebd0sm5073744b3a.55.2025.06.21.16.50.49 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 21 Jun 2025 16:50:49 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 016/101] target/arm: Add ZT0 Date: Sat, 21 Jun 2025 16:49:12 -0700 Message-ID: <20250621235037.74091-17-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250621235037.74091-1-richard.henderson@linaro.org> References: <20250621235037.74091-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::42f; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42f.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=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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org This is a 512-bit array introduced with SME2. Save it only when ZA is in use. Signed-off-by: Richard Henderson --- target/arm/cpu.h | 3 +++ target/arm/machine.c | 20 ++++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 052ca20283..465fc188d0 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -715,6 +715,9 @@ typedef struct CPUArchState { uint64_t scxtnum_el[4]; struct { + /* SME2 ZT0 -- 512 bit array, with data ordered like ARMVectorReg. */ + uint64_t zt0[512 / 64] QEMU_ALIGNED(16); + /* * SME ZA storage -- 256 x 256 byte array, with bytes in host * word order, as we do with vfp.zregs[]. This corresponds to diff --git a/target/arm/machine.c b/target/arm/machine.c index 6e73368ef9..6986915bee 100644 --- a/target/arm/machine.c +++ b/target/arm/machine.c @@ -321,6 +321,25 @@ static const VMStateDescription vmstate_za = { } }; +static bool zt0_needed(void *opaque) +{ + ARMCPU *cpu = opaque; + + return za_needed(cpu) && cpu_isar_feature(aa64_sme2, cpu); +} + +static const VMStateDescription vmstate_zt0 = { + .name = "cpu/zt0", + .version_id = 1, + .minimum_version_id = 1, + .needed = zt0_needed, + .fields = (VMStateField[]) { + VMSTATE_UINT64_ARRAY(env.za_state.zt0, ARMCPU, + ARRAY_SIZE(((CPUARMState *)0)->za_state.zt0)), + VMSTATE_END_OF_LIST() + } +}; + static bool serror_needed(void *opaque) { ARMCPU *cpu = opaque; @@ -1096,6 +1115,7 @@ const VMStateDescription vmstate_arm_cpu = { &vmstate_m_security, &vmstate_sve, &vmstate_za, + &vmstate_zt0, &vmstate_serror, &vmstate_irq_line_state, &vmstate_wfxt_timer,