diff mbox series

[v3,22/29] LoongArch: KVM: Implement handle idle exception

Message ID	20230228070057.3687180-23-zhaotianrui@loongson.cn
State	New
Headers	Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; From: Tianrui Zhao <zhaotianrui@loongson.cn> To: Paolo Bonzini <pbonzini@redhat.com> Cc: Huacai Chen <chenhuacai@kernel.org>, WANG Xuerui <kernel@xen0n.name>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Jens Axboe <axboe@kernel.dk>, Mark Brown <broonie@kernel.org>, Alex Deucher <alexander.deucher@amd.com>, Oliver Upton <oliver.upton@linux.dev>, maobibo@loongson.cn, Xi Ruoyao <xry111@xry111.site> Subject: [PATCH v3 22/29] LoongArch: KVM: Implement handle idle exception Date: Tue, 28 Feb 2023 15:00:49 +0800 Message-Id: <20230228070057.3687180-23-zhaotianrui@loongson.cn> In-Reply-To: <20230228070057.3687180-1-zhaotianrui@loongson.cn> References: <20230228070057.3687180-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	Add KVM LoongArch support \| [v3,00/29] Add KVM LoongArch support [v3,01/29] LoongArch: KVM: Add kvm related header files [v3,02/29] LoongArch: KVM: Implement kvm module related interface [v3,03/29] LoongArch: KVM: Implement kvm hardware enable, disable interface [v3,04/29] LoongArch: KVM: Implement VM related functions [v3,05/29] LoongArch: KVM: Add vcpu related header files [v3,06/29] LoongArch: KVM: Implement vcpu create and destroy interface [v3,07/29] LoongArch: KVM: Implement vcpu run interface [v3,08/29] LoongArch: KVM: Implement vcpu handle exit interface [v3,09/29] LoongArch: KVM: Implement vcpu get, vcpu set registers [v3,10/29] LoongArch: KVM: Implement vcpu ENABLE_CAP ioctl interface [v3,11/29] LoongArch: KVM: Implement fpu related operations for vcpu [v3,12/29] LoongArch: KVM: Implement vcpu interrupt operations [v3,13/29] LoongArch: KVM: Implement misc vcpu related interfaces [v3,14/29] LoongArch: KVM: Implement vcpu load and vcpu put operations [v3,15/29] LoongArch: KVM: Implement vcpu status description [v3,16/29] LoongArch: KVM: Implement update VM id function [v3,17/29] LoongArch: KVM: Implement virtual machine tlb operations [v3,18/29] LoongArch: KVM: Implement vcpu timer operations [v3,19/29] LoongArch: KVM: Implement kvm mmu operations [v3,20/29] LoongArch: KVM: Implement handle csr excption [v3,21/29] LoongArch: KVM: Implement handle iocsr exception [v3,22/29] LoongArch: KVM: Implement handle idle exception [v3,23/29] LoongArch: KVM: Implement handle gspr exception [v3,24/29] LoongArch: KVM: Implement handle mmio exception [v3,25/29] LoongArch: KVM: Implement handle fpu exception [v3,26/29] LoongArch: KVM: Implement kvm exception vector [v3,27/29] LoongArch: KVM: Implement vcpu world switch [v3,28/29] LoongArch: KVM: Implement probe virtualization when loongarch cpu init [v3,29/29] LoongArch: KVM: Enable kvm config and add the makefile

Commit Message

zhaotianrui Feb. 28, 2023, 7 a.m. UTC

  Implement kvm handle loongarch vcpu idle exception, using kvm_vcpu_block
to emulate it.

Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
---
 arch/loongarch/kvm/exit.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff mbox series

Patch

diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c
index f02e2b9402f2..f0de0b638f31 100644
--- a/arch/loongarch/kvm/exit.c
+++ b/arch/loongarch/kvm/exit.c
@@ -191,3 +191,15 @@  int _kvm_complete_iocsr_read(struct kvm_vcpu *vcpu, struct kvm_run *run)
 
 	return er;
 }
+
+int _kvm_emu_idle(struct kvm_vcpu *vcpu)
+{
+	++vcpu->stat.idle_exits;
+	trace_kvm_exit_idle(vcpu, KVM_TRACE_EXIT_IDLE);
+	if (!vcpu->arch.irq_pending) {
+		kvm_save_timer(vcpu);
+		kvm_vcpu_block(vcpu);
+	}
+
+	return EMULATE_DONE;
+}