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

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Message-ID: <20250927060910.2933942-2-seanjc@google.com>
Date: Fri, 26 Sep 2025 23:09:01 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Sean Christopherson <seanjc@...gle.com>
Subject: [GIT PULL] x86/kvm: Guest side changes for 6.18

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)

----------------------------------------------------------------
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(-)