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([71.212.157.132]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29034f93ea2sm172100975ad.126.2025.10.14.13.07.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Oct 2025 13:07:30 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org Subject: [PATCH v2 16/37] target/arm: Migrate cpreg128 registers Date: Tue, 14 Oct 2025 13:06:57 -0700 Message-ID: <20251014200718.422022-17-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251014200718.422022-1-richard.henderson@linaro.org> References: <20251014200718.422022-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::536; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x536.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, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@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-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Signed-off-by: Richard Henderson --- target/arm/machine.c | 50 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/target/arm/machine.c b/target/arm/machine.c index 44a0cf844b..2cc6234832 100644 --- a/target/arm/machine.c +++ b/target/arm/machine.c @@ -939,6 +939,34 @@ static const VMStateDescription vmstate_syndrome64 = { }, }; +static bool sysreg128_needed(void *opaque) +{ + ARMCPU *cpu = opaque; + return cpu->cpreg128_array_len != 0; +} + +static const VMStateDescription vmstate_sysreg128 = { + .name = "cpu/sysreg128", + .version_id = 1, + .minimum_version_id = 1, + .needed = sysreg128_needed, + .fields = (const VMStateField[]) { + /* + * The length-check must come before the arrays to avoid + * incoming data possibly overflowing the array. + */ + VMSTATE_INT32_POSITIVE_LE(cpreg128_vmstate_array_len, ARMCPU), + VMSTATE_VARRAY_INT32(cpreg128_vmstate_indexes, ARMCPU, + cpreg128_vmstate_array_len, + 0, vmstate_info_uint64, uint64_t), + VMSTATE_VARRAY_INT32(cpreg128_vmstate_values, ARMCPU, + cpreg128_vmstate_array_len, + 0, vmstate_info_int128, Int128), + + VMSTATE_END_OF_LIST() + }, +}; + static int cpu_pre_save(void *opaque) { ARMCPU *cpu = opaque; @@ -971,6 +999,12 @@ static int cpu_pre_save(void *opaque) memcpy(cpu->cpreg_vmstate_values, cpu->cpreg_values, cpu->cpreg_array_len * sizeof(uint64_t)); + cpu->cpreg128_vmstate_array_len = cpu->cpreg128_array_len; + memcpy(cpu->cpreg128_vmstate_indexes, cpu->cpreg128_indexes, + cpu->cpreg128_array_len * sizeof(uint64_t)); + memcpy(cpu->cpreg128_vmstate_values, cpu->cpreg128_values, + cpu->cpreg128_array_len * sizeof(Int128)); + return 0; } @@ -1065,6 +1099,21 @@ static int cpu_post_load(void *opaque, int version_id) v++; } + for (i = 0, v = 0; i < cpu->cpreg128_array_len + && v < cpu->cpreg128_vmstate_array_len; i++) { + if (cpu->cpreg128_vmstate_indexes[v] > cpu->cpreg128_indexes[i]) { + /* register in our list but not incoming : skip it */ + continue; + } + if (cpu->cpreg128_vmstate_indexes[v] < cpu->cpreg128_indexes[i]) { + /* register in their list but not ours: fail migration */ + return -1; + } + /* matching register, copy the value over */ + cpu->cpreg128_values[i] = cpu->cpreg128_vmstate_values[v]; + v++; + } + if (kvm_enabled()) { if (!kvm_arm_cpu_post_load(cpu)) { return -1; @@ -1209,6 +1258,7 @@ const VMStateDescription vmstate_arm_cpu = { &vmstate_wfxt_timer, &vmstate_syndrome64, &vmstate_pstate64, + &vmstate_sysreg128, NULL } }; -- 2.43.0