Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

To: "Anup Patel" <anup@xxxxxxxxxxxxxx>
Subject: Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
From: Radim Krčmář <rkrcmar@xxxxxxxxxxxxxxxx>
Date: Wed, 30 Apr 2025 16:38:57 +0200
Cc: "Anup Patel" <apatel@xxxxxxxxxxxxxxxx>, <kvm-riscv@xxxxxxxxxxxxxxxxxxx>, <kvm@xxxxxxxxxxxxxxx>, <linux-riscv@xxxxxxxxxxxxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>, "Atish Patra" <atishp@xxxxxxxxxxxxxx>, "Paul Walmsley" <paul.walmsley@xxxxxxxxxx>, "Palmer Dabbelt" <palmer@xxxxxxxxxxx>, "Albert Ou" <aou@xxxxxxxxxxxxxxxxx>, "Alexandre Ghiti" <alex@xxxxxxxx>, "Andrew Jones" <ajones@xxxxxxxxxxxxxxxx>, "Mayuresh Chitale" <mchitale@xxxxxxxxxxxxxxxx>
In-reply-to: <CAAhSdy1xCRocu2uNri4iDm+NQd+VE8JRVeASfYJ8Qspr5aEz8g@mail.gmail.com>
References: <20250403112522.1566629-3-rkrcmar@ventanamicro.com> <20250403112522.1566629-7-rkrcmar@ventanamicro.com> <CAAhSdy0e3HVN6pX-hcX2N+kpwsupsCf6BqrYq=bvtwtFOuEVhA@mail.gmail.com> <D9IGJR9DGFAM.1PVHVOOTVRFZW@ventanamicro.com> <CAK9=C2Woc5MtrJeqNtaVkMXWEsGeZPsmUgtFQET=OKLHLwRbPA@mail.gmail.com> <D9J1TBKYC8YH.1OPUI289U0O2C@ventanamicro.com> <CAAhSdy01yBBfJwdTn90WeXFR85=1zTxuebFhi4CQJuOujVTHXg@mail.gmail.com> <D9J9DW53Q2GD.1PB647ISOCXRX@ventanamicro.com> <CAAhSdy0B-pF-jHmTXNYE7NXwdCWJepDtGR__S+P4MhZ1bfUERQ@mail.gmail.com> <CAAhSdy20pq3KvbCeST=h+O5PWfs2E4uXpX9BbbzE7GJzn+pzkA@mail.gmail.com> <D9JTZ6HH00KY.1B1SKH1Z0UI1S@ventanamicro.com> <CAAhSdy0TfpWQ-kC_gUUCU0oC5dR45A1v9q84H2Tj9A8kdO0d1A@mail.gmail.com> <D9JY52BJEFX2.2S5XL9NOOGBS7@ventanamicro.com> <CAAhSdy1xCRocu2uNri4iDm+NQd+VE8JRVeASfYJ8Qspr5aEz8g@mail.gmail.com>

2025-04-30T18:32:31+05:30, Anup Patel <anup@xxxxxxxxxxxxxx>:
> On Wed, Apr 30, 2025 at 5:15 PM Radim Krčmář <rkrcmar@xxxxxxxxxxxxxxxx> wrote:
>> We can re-use KVM_SET_MP_STATE and add a KVM capability.
>> Userspace will opt-in to reset the VCPU through the existing IOCTL.
>>
>> This design will also allow userspace to trigger a VCPU reset without
>> tearing down the whole VM.
>
> Okay, lets go ahead with a KVM capability which user space can opt-in
> for KVM_SET_MP_STATE ioctl().
>
> Keep in mind that at runtime Guest can still do CPU hotplug using SBI
> HSM start/stop and do system suspend using SBI SUSP so we should
> continue to have VCPU reset requests for both these SBI extensions.

Will do, thanks.

References:
- [PATCH 0/5] KVM: RISC-V: VCPU reset fixes
  - From: Radim Krčmář
- [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Radim Krčmář
- Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Anup Patel
- Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Radim Krčmář
- Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Anup Patel
- Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Radim Krčmář
- Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Anup Patel
- Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Radim Krčmář
- Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Anup Patel
- Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Anup Patel
- Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Radim Krčmář
- Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Anup Patel
- Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Radim Krčmář
- Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
  - From: Anup Patel

Prev by Date: Re: [PATCH v2 00/13] objtool: Detect and warn about indirect calls in __nocfi functions
Next by Date: Re: [PATCH 12/13] target/arm/cpu: compile file twice (user, system) only
Previous by thread: Re: [PATCH 4/5] KVM: RISC-V: reset VCPU state when becoming runnable
Next by thread: Re: [PATCH v6 41/60] hw/i386: add option to forcibly report edge trigger in acpi tables
Index(es):
- Date
- Thread

[Index of Archives] [KVM ARM] [KVM ia64] [KVM ppc] [Virtualization Tools] [Spice Development] [Libvirt] [Libvirt Users] [Linux USB Devel] [Linux Audio Users] [Yosemite Questions] [Linux Kernel] [Linux SCSI] [XFree86]