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Mon, 27 Feb 2023 23:01:02 -0800 (PST) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8Dxj82tpv1joWAGAA--.6568S3; Tue, 28 Feb 2023 15:01:01 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Bxc+Wppv1jPG9AAA--.15462S15; Tue, 28 Feb 2023 15:01:01 +0800 (CST) From: Tianrui Zhao To: Paolo Bonzini Cc: Huacai Chen , WANG Xuerui , 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 Subject: [PATCH v3 13/29] LoongArch: KVM: Implement misc vcpu related interfaces Date: Tue, 28 Feb 2023 15:00:40 +0800 Message-Id: <20230228070057.3687180-14-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230228070057.3687180-1-zhaotianrui@loongson.cn> References: <20230228070057.3687180-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8Bxc+Wppv1jPG9AAA--.15462S15 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoWxJw4kXFW5Wr48KF18Wr17Wrg_yoW5CFy8pr 1xC3y5X3yrGr47Gw1ftrs09rsI93ykKr17Zry7W3ya9r4DKF15Aa1kKrWDAFW5Jr1rZF1S vrn8ta1Dua1Fy3JanT9S1TB71UUUUbUqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU bx8Fc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26r4UJVWxJr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aV CY1x0267AKxVWxJr0_GcWln4kS14v26r126r1DM2AIxVAIcxkEcVAq07x20xvEncxIr21l 57IF6xkI12xvs2x26I8E6xACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6x8ErcxFaV Av8VWrMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCY1x0262kKe7AKxVWU tVW8ZwCF04k20xvY0x0EwIxGrwCF04k20xvE74AGY7Cv6cx26rWl4I8I3I0E4IkC6x0Yz7 v_Jr0_Gr1l4IxYO2xFxVAFwI0_JF0_Jw1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8G jcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2I x0cI8IcVAFwI0_tr0E3s1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4UJVWxJr1lIxAIcVCF 04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4UJVWxJr1lIxAIcVC2z280aV CY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x0zRfuc_UUUUU= X-Spam-Status: No, score=1.4 required=5.0 tests=BAYES_00,RCVD_IN_SBL_CSS, SPF_HELO_PASS,SPF_PASS 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?1759057274286602674?= X-GMAIL-MSGID: =?utf-8?q?1759057274286602674?= 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 | 95 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 95 insertions(+) diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index bdcc73172eae..615f68d082f8 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -13,6 +13,101 @@ #define CREATE_TRACE_POINTS #include "trace.h" +int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) +{ + return !!(vcpu->arch.irq_pending); +} + +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 << (EXCCODE_TIMER - EXCCODE_INT_START)); +} + +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) +{ + return -ENOIOCTLCMD; +} + +int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, + struct kvm_mp_state *mp_state) +{ + return -ENOIOCTLCMD; +} + +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, int force) { struct loongarch_csrs *csr = vcpu->arch.csr;