linux-kernel - Re: [PATCH v3 0/5] kvm: fix latent guest entry/exit bugs

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Message-ID: <YfleTYWIW1sBbMNn@FVFF77S0Q05N>
Date:   Tue, 1 Feb 2022 16:22:37 +0000
From:   Mark Rutland <mark.rutland@....com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     linux-kernel@...r.kernel.org, aleksandar.qemu.devel@...il.com,
        alexandru.elisei@....com, anup@...infault.org,
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Subject: Re: [PATCH v3 0/5] kvm: fix latent guest entry/exit bugs

On Tue, Feb 01, 2022 at 04:59:47PM +0100, Paolo Bonzini wrote:
> On 2/1/22 14:29, Mark Rutland wrote:
> > I've pushed the series (based on v5.17-rc2) to my kvm/entry-rework branch:
> > 
> >    https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git/log/?h=kvm/entry-rework
> >    git://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git kvm/entry-rework
> 
> Thanks!  I cherry-picked the basic, x86 and mips patches to kvm.git's master
> branch (I did not use your branch in order to leave arm64 and riscv to the
> respective maintainers).

Since everything's dependent upon that core patch, IIUC that's going to make it
a pain for them to queue things.

How are you expecting the arm64 and riscv maintainers to queue things? Queue
their own copies of that core patch?

Thanks,
Mark.

> Paolo
> 
> > This version of the series is tagged as kvm-entry-rework-20220201.
> > 
> > [1] https://lore.kernel.org/r/20220111153539.2532246-1-mark.rutland@arm.com/
> > [2] https://lore.kernel.org/r/20220119105854.3160683-1-mark.rutland@arm.com/
> > 
> > Thanks,
> > 
> > 
> > Mark Rutland (5):
> >    kvm: add guest_state_{enter,exit}_irqoff()
> >    kvm/arm64: rework guest entry logic
> >    kvm/x86: rework guest entry logic
> >    kvm/riscv: rework guest entry logic
> >    kvm/mips: rework guest entry logic
> > 
> >   arch/arm64/kvm/arm.c     |  51 +++++++++++-------
> >   arch/mips/kvm/mips.c     |  50 +++++++++++++++--
> >   arch/riscv/kvm/vcpu.c    |  44 +++++++++------
> >   arch/x86/kvm/svm/svm.c   |   4 +-
> >   arch/x86/kvm/vmx/vmx.c   |   4 +-
> >   arch/x86/kvm/x86.c       |   4 +-
> >   arch/x86/kvm/x86.h       |  45 ----------------
> >   include/linux/kvm_host.h | 112 +++++++++++++++++++++++++++++++++++++--
> >   8 files changed, 222 insertions(+), 92 deletions(-)
> > 
>