linux-kernel - Re: [GIT PULL] x86/kvm: Guest side changes for 6.18

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Message-ID: <CABgObfb_vRm+WgR_i_BNrhfs_nt46W=ZvFgjuwnn4P5fYfeQXg@mail.gmail.com>
Date: Tue, 30 Sep 2025 19:28:31 +0200
From: Paolo Bonzini <pbonzini@...hat.com>
To: Sean Christopherson <seanjc@...gle.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] x86/kvm: Guest side changes for 6.18

On Sat, Sep 27, 2025 at 8:09 AM Sean Christopherson <seanjc@...gle.com> wrote:
>
> A few smallish guest-side changes.
>
> The following changes since commit a6ad54137af92535cfe32e19e5f3bc1bb7dbd383:
>
>   Merge branch 'guest-memfd-mmap' into HEAD (2025-08-27 04:41:35 -0400)
>
> are available in the Git repository at:
>
>   https://github.com/kvm-x86/linux.git tags/kvm-x86-guest-6.18
>
> for you to fetch changes up to 960550503965094b0babd7e8c83ec66c8a763b0b:
>
>   x86/kvm: Prefer native qspinlock for dedicated vCPUs irrespective of PV_UNHALT (2025-09-11 08:58:37 -0700)

Pulled, thanks.

Paolo

> ----------------------------------------------------------------
> x86/kvm guest side changes for 6.18
>
>  - For the legacy PCI hole (memory between TOLUD and 4GiB) to UC when
>    overriding guest MTRR for TDX/SNP to fix an issue where ACPI auto-mapping
>    could map devices as WB and prevent the device drivers from mapping their
>    devices with UC/UC-.
>
>  - Make kvm_async_pf_task_wake() a local static helper and remove its
>    export.
>
>  - Use native qspinlocks when running in a VM with dedicated vCPU=>pCPU
>    bindings even when PV_UNHALT is unsupported.
>
> ----------------------------------------------------------------
> Li RongQing (1):
>       x86/kvm: Prefer native qspinlock for dedicated vCPUs irrespective of PV_UNHALT
>
> Sean Christopherson (2):
>       x86/kvm: Force legacy PCI hole to UC when overriding MTRRs for TDX/SNP
>       x86/kvm: Make kvm_async_pf_task_wake() a local static helper
>
>  arch/x86/include/asm/kvm_para.h |  2 --
>  arch/x86/kernel/kvm.c           | 44 ++++++++++++++++++++++++++++-------------
>  2 files changed, 30 insertions(+), 16 deletions(-)
>