From patchwork Sun Sep 29 07:04:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibo Mao X-Patchwork-Id: 13814846 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 D4456CF649F for ; Sun, 29 Sep 2024 07:05:11 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sunyg-0000wS-EA; Sun, 29 Sep 2024 03:04:22 -0400 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 1sunyb-0000uT-8h for qemu-devel@nongnu.org; Sun, 29 Sep 2024 03:04:17 -0400 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sunyX-0005Z5-Dq for qemu-devel@nongnu.org; Sun, 29 Sep 2024 03:04:17 -0400 Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8DxPIvm+_hmrbADAA--.3248S3; Sun, 29 Sep 2024 15:04:06 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowMBxztXl+_hmI8cUAA--.1144S4; Sun, 29 Sep 2024 15:04:06 +0800 (CST) From: Bibo Mao To: Song Gao Cc: Huacai Chen , qemu-devel@nongnu.org Subject: [PATCH v5 2/2] target/loongarch: Implement lbt registers save/restore function Date: Sun, 29 Sep 2024 15:04:05 +0800 Message-Id: <20240929070405.235200-3-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20240929070405.235200-1-maobibo@loongson.cn> References: <20240929070405.235200-1-maobibo@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: qMiowMBxztXl+_hmI8cUAA--.1144S4 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_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_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 Six registers scr0 - scr3, eflags and ftop are added in percpu vmstate. And two functions kvm_loongarch_get_lbt/kvm_loongarch_put_lbt are added to save/restore lbt registers. Signed-off-by: Bibo Mao --- target/loongarch/cpu.h | 12 ++++++++ target/loongarch/kvm/kvm.c | 62 ++++++++++++++++++++++++++++++++++++++ target/loongarch/machine.c | 24 +++++++++++++++ 3 files changed, 98 insertions(+) diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h index 2b3f2758f6..136866b7b8 100644 --- a/target/loongarch/cpu.h +++ b/target/loongarch/cpu.h @@ -286,6 +286,17 @@ enum loongarch_features { LOONGARCH_FEATURE_LBT, /* loongson binary translation extension */ }; +typedef struct LoongArchBT { + /* scratch registers */ + uint64_t scr0; + uint64_t scr1; + uint64_t scr2; + uint64_t scr3; + /* loongarch eflags */ + uint32_t eflags; + uint32_t ftop; +} lbt_t; + typedef struct CPUArchState { uint64_t gpr[32]; uint64_t pc; @@ -293,6 +304,7 @@ typedef struct CPUArchState { fpr_t fpr[32]; bool cf[8]; uint32_t fcsr0; + lbt_t lbt; uint32_t cpucfg[21]; diff --git a/target/loongarch/kvm/kvm.c b/target/loongarch/kvm/kvm.c index 8d2893efd3..5869e19f6d 100644 --- a/target/loongarch/kvm/kvm.c +++ b/target/loongarch/kvm/kvm.c @@ -477,6 +477,58 @@ static int kvm_loongarch_put_regs_fp(CPUState *cs) return ret; } +static int kvm_loongarch_put_lbt(CPUState *cs) +{ + CPULoongArchState *env = cpu_env(cs); + uint64_t val; + int ret; + + /* check whether vm support LBT firstly */ + if (FIELD_EX32(env->cpucfg[2], CPUCFG2, LBT_ALL) != 7) { + return 0; + } + + /* set six LBT registers including scr0-scr3, eflags, ftop */ + ret = kvm_set_one_reg(cs, KVM_REG_LOONGARCH_LBT_SCR0, &env->lbt.scr0); + ret |= kvm_set_one_reg(cs, KVM_REG_LOONGARCH_LBT_SCR1, &env->lbt.scr1); + ret |= kvm_set_one_reg(cs, KVM_REG_LOONGARCH_LBT_SCR2, &env->lbt.scr2); + ret |= kvm_set_one_reg(cs, KVM_REG_LOONGARCH_LBT_SCR3, &env->lbt.scr3); + /* + * Be cautious, KVM_REG_LOONGARCH_LBT_FTOP is defined as 64-bit however + * lbt.ftop is 32-bit; the same with KVM_REG_LOONGARCH_LBT_EFLAGS register + */ + val = env->lbt.eflags; + ret |= kvm_set_one_reg(cs, KVM_REG_LOONGARCH_LBT_EFLAGS, &val); + val = env->lbt.ftop; + ret |= kvm_set_one_reg(cs, KVM_REG_LOONGARCH_LBT_FTOP, &val); + + return ret; +} + +static int kvm_loongarch_get_lbt(CPUState *cs) +{ + CPULoongArchState *env = cpu_env(cs); + uint64_t val; + int ret; + + /* check whether vm support LBT firstly */ + if (FIELD_EX32(env->cpucfg[2], CPUCFG2, LBT_ALL) != 7) { + return 0; + } + + /* get six LBT registers including scr0-scr3, eflags, ftop */ + ret = kvm_get_one_reg(cs, KVM_REG_LOONGARCH_LBT_SCR0, &env->lbt.scr0); + ret |= kvm_get_one_reg(cs, KVM_REG_LOONGARCH_LBT_SCR1, &env->lbt.scr1); + ret |= kvm_get_one_reg(cs, KVM_REG_LOONGARCH_LBT_SCR2, &env->lbt.scr2); + ret |= kvm_get_one_reg(cs, KVM_REG_LOONGARCH_LBT_SCR3, &env->lbt.scr3); + ret |= kvm_get_one_reg(cs, KVM_REG_LOONGARCH_LBT_EFLAGS, &val); + env->lbt.eflags = (uint32_t)val; + ret |= kvm_get_one_reg(cs, KVM_REG_LOONGARCH_LBT_FTOP, &val); + env->lbt.ftop = (uint32_t)val; + + return ret; +} + void kvm_arch_reset_vcpu(CPUState *cs) { CPULoongArchState *env = cpu_env(cs); @@ -613,6 +665,11 @@ int kvm_arch_get_registers(CPUState *cs) return ret; } + ret = kvm_loongarch_get_lbt(cs); + if (ret) { + return ret; + } + ret = kvm_loongarch_get_mpstate(cs); return ret; } @@ -641,6 +698,11 @@ int kvm_arch_put_registers(CPUState *cs, int level) return ret; } + ret = kvm_loongarch_put_lbt(cs); + if (ret) { + return ret; + } + ret = kvm_loongarch_put_mpstate(cs); return ret; } diff --git a/target/loongarch/machine.c b/target/loongarch/machine.c index 08a7fa5370..3d5c84ae9c 100644 --- a/target/loongarch/machine.c +++ b/target/loongarch/machine.c @@ -110,6 +110,29 @@ static const VMStateDescription vmstate_lasx = { }, }; +static bool lbt_needed(void *opaque) +{ + LoongArchCPU *cpu = opaque; + + return !!FIELD_EX64(cpu->env.cpucfg[2], CPUCFG2, LBT_ALL); +} + +static const VMStateDescription vmstate_lbt = { + .name = "cpu/lbt", + .version_id = 0, + .minimum_version_id = 0, + .needed = lbt_needed, + .fields = (const VMStateField[]) { + VMSTATE_UINT64(env.lbt.scr0, LoongArchCPU), + VMSTATE_UINT64(env.lbt.scr1, LoongArchCPU), + VMSTATE_UINT64(env.lbt.scr2, LoongArchCPU), + VMSTATE_UINT64(env.lbt.scr3, LoongArchCPU), + VMSTATE_UINT32(env.lbt.eflags, LoongArchCPU), + VMSTATE_UINT32(env.lbt.ftop, LoongArchCPU), + VMSTATE_END_OF_LIST() + }, +}; + #if defined(CONFIG_TCG) && !defined(CONFIG_USER_ONLY) static bool tlb_needed(void *opaque) { @@ -219,6 +242,7 @@ const VMStateDescription vmstate_loongarch_cpu = { #if defined(CONFIG_TCG) && !defined(CONFIG_USER_ONLY) &vmstate_tlb, #endif + &vmstate_lbt, NULL } };