From: Paolo Bonzini <pbonzini@redhat.com>
To: Tianrui Zhao <zhaotianrui@loongson.cn>
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: Re: [PING PATCH v4 23/29] LoongArch: KVM: Implement handle gspr exception
Date: Tue, 28 Mar 2023 16:13:54 +0200 [thread overview]
Message-ID: <7463da3b-1d52-40a4-97a3-4f912f4f9fdb@redhat.com> (raw)
In-Reply-To: <20230328123119.3649361-24-zhaotianrui@loongson.cn>
On 3/28/23 14:31, Tianrui Zhao wrote:
> + case 0xc91:
> + /* idle GSPR */
> + er = _kvm_emu_idle(vcpu);
> + break;
So this is my last remark. What some other architectures do is change
vcpu->arch.mp_state when entering an idle state, and at this point all
calls to KVM_RUN would call the equivalent of _kvm_emu_idle(). This
requires implementing the KVM_GET_MPSTATE and KVM_SET_MPSTATE ioctls.
This might also be useful if later you want to implement a mechanism
where vCPUs can pause or resume, for example for multi-vCPU VMs.
You can implement this on top of what you have, but I highly recommend
that you do it in the first version of what is committed to Linux.
Paolo
next prev parent reply other threads:[~2023-03-28 14:15 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-28 12:30 [PING PATCH v4 00/29] Add KVM LoongArch support Tianrui Zhao
2023-03-28 12:30 ` [PING PATCH v4 01/29] LoongArch: KVM: Add kvm related header files Tianrui Zhao
2023-03-28 12:30 ` [PING PATCH v4 02/29] LoongArch: KVM: Implement kvm module related interface Tianrui Zhao
2023-03-28 12:30 ` [PING PATCH v4 03/29] LoongArch: KVM: Implement kvm hardware enable, disable interface Tianrui Zhao
2023-03-28 12:30 ` [PING PATCH v4 04/29] LoongArch: KVM: Implement VM related functions Tianrui Zhao
2023-03-28 12:30 ` [PING PATCH v4 05/29] LoongArch: KVM: Add vcpu related header files Tianrui Zhao
2023-03-28 12:30 ` [PING PATCH v4 06/29] LoongArch: KVM: Implement vcpu create and destroy interface Tianrui Zhao
2023-03-28 12:30 ` [PING PATCH v4 07/29] LoongArch: KVM: Implement vcpu run interface Tianrui Zhao
2023-03-28 12:30 ` [PING PATCH v4 08/29] LoongArch: KVM: Implement vcpu handle exit interface Tianrui Zhao
2023-03-28 12:30 ` [PING PATCH v4 09/29] LoongArch: KVM: Implement vcpu get, vcpu set registers Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 10/29] LoongArch: KVM: Implement vcpu ENABLE_CAP ioctl interface Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 11/29] LoongArch: KVM: Implement fpu related operations for vcpu Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 12/29] LoongArch: KVM: Implement vcpu interrupt operations Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 13/29] LoongArch: KVM: Implement misc vcpu related interfaces Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 14/29] LoongArch: KVM: Implement vcpu load and vcpu put operations Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 15/29] LoongArch: KVM: Implement vcpu status description Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 16/29] LoongArch: KVM: Implement update VM id function Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 17/29] LoongArch: KVM: Implement virtual machine tlb operations Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 18/29] LoongArch: KVM: Implement vcpu timer operations Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 19/29] LoongArch: KVM: Implement kvm mmu operations Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 20/29] LoongArch: KVM: Implement handle csr excption Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 21/29] LoongArch: KVM: Implement handle iocsr exception Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 22/29] LoongArch: KVM: Implement handle idle exception Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 23/29] LoongArch: KVM: Implement handle gspr exception Tianrui Zhao
2023-03-28 14:13 ` Paolo Bonzini [this message]
2023-03-28 12:31 ` [PING PATCH v4 24/29] LoongArch: KVM: Implement handle mmio exception Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 25/29] LoongArch: KVM: Implement handle fpu exception Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 26/29] LoongArch: KVM: Implement kvm exception vector Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 27/29] LoongArch: KVM: Implement vcpu world switch Tianrui Zhao
2023-03-28 14:13 ` Paolo Bonzini
2023-03-30 3:41 ` Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 28/29] LoongArch: KVM: Implement probe virtualization when loongarch cpu init Tianrui Zhao
2023-03-28 12:31 ` [PING PATCH v4 29/29] LoongArch: KVM: Enable kvm config and add the makefile Tianrui Zhao
2023-03-28 14:16 ` [PING PATCH v4 00/29] Add KVM LoongArch support Paolo Bonzini
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