From patchwork Wed Dec 25 02:40:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: bibo mao X-Patchwork-Id: 13920602 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F22ECE77188 for ; Wed, 25 Dec 2024 02:41:52 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tQHK3-0007T1-JP; Tue, 24 Dec 2024 21:40:31 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tQHK1-0007RK-AN for qemu-devel@nongnu.org; Tue, 24 Dec 2024 21:40:29 -0500 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tQHJx-0000YC-KD for qemu-devel@nongnu.org; Tue, 24 Dec 2024 21:40:29 -0500 Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8CxTOKQcGtnNEBaAA--.45437S3; Wed, 25 Dec 2024 10:40:16 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowMCx3sWJcGtnJV0IAA--.35957S7; Wed, 25 Dec 2024 10:40:15 +0800 (CST) From: Bibo Mao To: Stefan Hajnoczi Cc: qemu-devel@nongnu.org, Song Gao Subject: [PULL 5/6] target/loongarch: Use auto method with LSX feature Date: Wed, 25 Dec 2024 10:40:07 +0800 Message-Id: <20241225024008.486236-6-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20241225024008.486236-1-maobibo@loongson.cn> References: <20241225024008.486236-1-maobibo@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: qMiowMCx3sWJcGtnJV0IAA--.35957S7 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Received-SPF: pass client-ip=114.242.206.163; envelope-from=maobibo@loongson.cn; helo=mail.loongson.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Like LBT feature, add type OnOffAuto for LSX feature setting. Also add LSX feature detection with new VM ioctl command, fallback to old method if it is not supported. Signed-off-by: Bibo Mao Reviewed-by: Bibo Mao --- target/loongarch/cpu.c | 38 +++++++++++++++------------ target/loongarch/cpu.h | 2 ++ target/loongarch/kvm/kvm.c | 54 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 77 insertions(+), 17 deletions(-) diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c index f5bc8720d1..4f425df9f3 100644 --- a/target/loongarch/cpu.c +++ b/target/loongarch/cpu.c @@ -379,6 +379,7 @@ static void loongarch_la464_initfn(Object *obj) { LoongArchCPU *cpu = LOONGARCH_CPU(obj); CPULoongArchState *env = &cpu->env; + uint32_t data = 0; int i; for (i = 0; i < 21; i++) { @@ -388,7 +389,6 @@ static void loongarch_la464_initfn(Object *obj) cpu->dtb_compatible = "loongarch,Loongson-3A5000"; env->cpucfg[0] = 0x14c010; /* PRID */ - uint32_t data = 0; data = FIELD_DP32(data, CPUCFG1, ARCH, 2); data = FIELD_DP32(data, CPUCFG1, PGMMU, 1); data = FIELD_DP32(data, CPUCFG1, IOCSR, 1); @@ -477,7 +477,7 @@ static void loongarch_la132_initfn(Object *obj) { LoongArchCPU *cpu = LOONGARCH_CPU(obj); CPULoongArchState *env = &cpu->env; - + uint32_t data = 0; int i; for (i = 0; i < 21; i++) { @@ -487,7 +487,6 @@ static void loongarch_la132_initfn(Object *obj) cpu->dtb_compatible = "loongarch,Loongson-1C103"; env->cpucfg[0] = 0x148042; /* PRID */ - uint32_t data = 0; data = FIELD_DP32(data, CPUCFG1, ARCH, 1); /* LA32 */ data = FIELD_DP32(data, CPUCFG1, PGMMU, 1); data = FIELD_DP32(data, CPUCFG1, IOCSR, 1); @@ -615,27 +614,30 @@ static void loongarch_cpu_realizefn(DeviceState *dev, Error **errp) static bool loongarch_get_lsx(Object *obj, Error **errp) { - LoongArchCPU *cpu = LOONGARCH_CPU(obj); - bool ret; - - if (FIELD_EX32(cpu->env.cpucfg[2], CPUCFG2, LSX)) { - ret = true; - } else { - ret = false; - } - return ret; + return LOONGARCH_CPU(obj)->lsx != ON_OFF_AUTO_OFF; } static void loongarch_set_lsx(Object *obj, bool value, Error **errp) { LoongArchCPU *cpu = LOONGARCH_CPU(obj); + uint32_t val; - if (value) { - cpu->env.cpucfg[2] = FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LSX, 1); - } else { - cpu->env.cpucfg[2] = FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LSX, 0); - cpu->env.cpucfg[2] = FIELD_DP32(cpu->env.cpucfg[2], CPUCFG2, LASX, 0); + cpu->lsx = value ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF; + if (kvm_enabled()) { + /* kvm feature detection in function kvm_arch_init_vcpu */ + return; } + + /* LSX feature detection in TCG mode */ + val = cpu->env.cpucfg[2]; + if (cpu->lsx == ON_OFF_AUTO_ON) { + if (FIELD_EX32(val, CPUCFG2, LSX) == 0) { + error_setg(errp, "Failed to enable LSX in TCG mode"); + return; + } + } + + cpu->env.cpucfg[2] = FIELD_DP32(val, CPUCFG2, LSX, value); } static bool loongarch_get_lasx(Object *obj, Error **errp) @@ -693,6 +695,7 @@ void loongarch_cpu_post_init(Object *obj) { LoongArchCPU *cpu = LOONGARCH_CPU(obj); + cpu->lsx = ON_OFF_AUTO_AUTO; object_property_add_bool(obj, "lsx", loongarch_get_lsx, loongarch_set_lsx); object_property_add_bool(obj, "lasx", loongarch_get_lasx, @@ -713,6 +716,7 @@ void loongarch_cpu_post_init(Object *obj) } else { cpu->lbt = ON_OFF_AUTO_OFF; + cpu->pmu = ON_OFF_AUTO_OFF; } } diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h index 86c86c6c95..5bddf72c22 100644 --- a/target/loongarch/cpu.h +++ b/target/loongarch/cpu.h @@ -283,6 +283,7 @@ typedef struct LoongArchTLB LoongArchTLB; #endif enum loongarch_features { + LOONGARCH_FEATURE_LSX, LOONGARCH_FEATURE_LBT, /* loongson binary translation extension */ LOONGARCH_FEATURE_PMU, }; @@ -404,6 +405,7 @@ struct ArchCPU { uint32_t phy_id; OnOffAuto lbt; OnOffAuto pmu; + OnOffAuto lsx; /* 'compatible' string for this CPU for Linux device trees */ const char *dtb_compatible; diff --git a/target/loongarch/kvm/kvm.c b/target/loongarch/kvm/kvm.c index 3c86f5ffb9..eeedf3175e 100644 --- a/target/loongarch/kvm/kvm.c +++ b/target/loongarch/kvm/kvm.c @@ -798,8 +798,35 @@ static bool kvm_feature_supported(CPUState *cs, enum loongarch_features feature) { int ret; struct kvm_device_attr attr; + uint64_t val; switch (feature) { + case LOONGARCH_FEATURE_LSX: + attr.group = KVM_LOONGARCH_VM_FEAT_CTRL; + attr.attr = KVM_LOONGARCH_VM_FEAT_LSX; + ret = kvm_vm_ioctl(kvm_state, KVM_HAS_DEVICE_ATTR, &attr); + if (ret == 0) { + return true; + } + + /* Fallback to old kernel detect interface */ + val = 0; + attr.group = KVM_LOONGARCH_VCPU_CPUCFG; + /* Cpucfg2 */ + attr.attr = 2; + attr.addr = (uint64_t)&val; + ret = kvm_vcpu_ioctl(cs, KVM_HAS_DEVICE_ATTR, &attr); + if (!ret) { + ret = kvm_vcpu_ioctl(cs, KVM_GET_DEVICE_ATTR, &attr); + if (ret) { + return false; + } + + ret = FIELD_EX32((uint32_t)val, CPUCFG2, LSX); + return (ret != 0); + } + return false; + case LOONGARCH_FEATURE_LBT: /* * Return all if all the LBT features are supported such as: @@ -829,6 +856,28 @@ static bool kvm_feature_supported(CPUState *cs, enum loongarch_features feature) return false; } +static int kvm_cpu_check_lsx(CPUState *cs, Error **errp) +{ + CPULoongArchState *env = cpu_env(cs); + LoongArchCPU *cpu = LOONGARCH_CPU(cs); + bool kvm_supported; + + kvm_supported = kvm_feature_supported(cs, LOONGARCH_FEATURE_LSX); + env->cpucfg[2] = FIELD_DP32(env->cpucfg[2], CPUCFG2, LSX, 0); + if (cpu->lsx == ON_OFF_AUTO_ON) { + if (kvm_supported) { + env->cpucfg[2] = FIELD_DP32(env->cpucfg[2], CPUCFG2, LSX, 1); + } else { + error_setg(errp, "'lsx' feature not supported by KVM on this host"); + return -ENOTSUP; + } + } else if ((cpu->lsx == ON_OFF_AUTO_AUTO) && kvm_supported) { + env->cpucfg[2] = FIELD_DP32(env->cpucfg[2], CPUCFG2, LSX, 1); + } + + return 0; +} + static int kvm_cpu_check_lbt(CPUState *cs, Error **errp) { CPULoongArchState *env = cpu_env(cs); @@ -889,6 +938,11 @@ int kvm_arch_init_vcpu(CPUState *cs) brk_insn = val; } + ret = kvm_cpu_check_lsx(cs, &local_err); + if (ret < 0) { + error_report_err(local_err); + } + ret = kvm_cpu_check_lbt(cs, &local_err); if (ret < 0) { error_report_err(local_err);