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Tue, 9 May 2023 00:53:55 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8AxHusS_FlkGeMGAA--.11498S3; Tue, 09 May 2023 15:53:54 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8BxFLUK_FlkIEhSAA--.16908S15; Tue, 09 May 2023 15:53:53 +0800 (CST) From: Tianrui Zhao To: Paolo Bonzini , Huacai Chen , WANG Xuerui Cc: Greg Kroah-Hartman , loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Jens Axboe , Mark Brown , Alex Deucher , Oliver Upton , maobibo@loongson.cn, Xi Ruoyao , zhaotianrui@loongson.cn Subject: [PATCH v9 13/30] LoongArch: KVM: Implement misc vcpu related interfaces Date: Tue, 9 May 2023 15:53:29 +0800 Message-Id: <20230509075346.1023386-14-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230509075346.1023386-1-zhaotianrui@loongson.cn> References: <20230509075346.1023386-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8BxFLUK_FlkIEhSAA--.16908S15 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoWxJw4ftr4xCF4xXFWrAF1rtFb_yoW5Zw4fpr 1kCw45Xw4rGrW7Ww1ftws09rsI93ykKr17ZryxW3yY9r4DtF15Ar4kKrWDAFW5JryrZF1S yrn8Aa1Dua1jy3JanT9S1TB71UUUUjJqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU b4AFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26r4UJVWxJr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6x kF7I0E14v26F4UJVW0owAaw2AFwI0_JF0_Jw1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAq jxCEc2xF0cIa020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E74AGY7Cv6c x26rWlOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JMxkF7I0En4kS14v26r12 6r1DMxAIw28IcxkI7VAKI48JMxAIw28IcVCjz48v1sIEY20_WwCFx2IqxVCFs4IE7xkEbV WUJVW8JwCFI7km07C267AKxVWUAVWUtwC20s026c02F40E14v26r1j6r18MI8I3I0E7480 Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7 IYx2IY67AKxVWDJVCq3wCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwCI42IY6xAI w20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr1j6F4UJwCI42IY6I8E87Iv6x kF7I0E14v26r4UJVWxJrUvcSsGvfC2KfnxnUUI43ZEXa7xRiTKZJUUUUU== X-Spam-Status: No, score=1.4 required=5.0 tests=BAYES_00,RCVD_IN_SBL_CSS, SPF_HELO_PASS,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Level: * X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1765403207929817261?= X-GMAIL-MSGID: =?utf-8?q?1765403207929817261?= Implement some misc vcpu relaterd interfaces, such as vcpu runnable, vcpu should kick, vcpu dump regs, etc. Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/vcpu.c | 108 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 108 insertions(+) diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index f661743dbe66..a314fb441962 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -12,6 +12,114 @@ #define CREATE_TRACE_POINTS #include "trace.h" +int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) +{ + return !!(vcpu->arch.irq_pending) && + vcpu->arch.mp_state.mp_state == KVM_MP_STATE_RUNNABLE; +} + +int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) +{ + return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; +} + +bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu) +{ + return false; +} + +vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) +{ + return VM_FAULT_SIGBUS; +} + +int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, + struct kvm_translation *tr) +{ + return -EINVAL; +} + +int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) +{ + return _kvm_pending_timer(vcpu) || + kvm_read_hw_gcsr(LOONGARCH_CSR_ESTAT) & + (1 << INT_TI); +} + +int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu) +{ + int i; + + if (!vcpu) + return -1; + + kvm_debug("vCPU Register Dump:\n"); + kvm_debug("\tpc = 0x%08lx\n", vcpu->arch.pc); + kvm_debug("\texceptions: %08lx\n", vcpu->arch.irq_pending); + + for (i = 0; i < 32; i += 4) { + kvm_debug("\tgpr%02d: %08lx %08lx %08lx %08lx\n", i, + vcpu->arch.gprs[i], + vcpu->arch.gprs[i + 1], + vcpu->arch.gprs[i + 2], vcpu->arch.gprs[i + 3]); + } + + kvm_debug("\tCRMOD: 0x%08llx, exst: 0x%08llx\n", + kvm_read_hw_gcsr(LOONGARCH_CSR_CRMD), + kvm_read_hw_gcsr(LOONGARCH_CSR_ESTAT)); + + kvm_debug("\tERA: 0x%08llx\n", kvm_read_hw_gcsr(LOONGARCH_CSR_ERA)); + + return 0; +} + +int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, + struct kvm_mp_state *mp_state) +{ + *mp_state = vcpu->arch.mp_state; + + return 0; +} + +int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, + struct kvm_mp_state *mp_state) +{ + int ret = 0; + + switch (mp_state->mp_state) { + case KVM_MP_STATE_RUNNABLE: + vcpu->arch.mp_state = *mp_state; + break; + default: + ret = -EINVAL; + } + + return ret; +} + +int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, + struct kvm_guest_debug *dbg) +{ + return -EINVAL; +} + +/** + * kvm_migrate_count() - Migrate timer. + * @vcpu: Virtual CPU. + * + * Migrate hrtimer to the current CPU by cancelling and restarting it + * if it was running prior to being cancelled. + * + * Must be called when the vCPU is migrated to a different CPU to ensure that + * timer expiry during guest execution interrupts the guest and causes the + * interrupt to be delivered in a timely manner. + */ +static void kvm_migrate_count(struct kvm_vcpu *vcpu) +{ + if (hrtimer_cancel(&vcpu->arch.swtimer)) + hrtimer_restart(&vcpu->arch.swtimer); +} + int _kvm_getcsr(struct kvm_vcpu *vcpu, unsigned int id, u64 *v) { unsigned long val;