1. 17 Sep, 2024 4 commits
  2. 15 Sep, 2024 3 commits
    • Linus Torvalds's avatar
      Linux 6.11 · 98f7e32f
      Linus Torvalds authored
      98f7e32f
    • Linus Torvalds's avatar
      Merge tag 'for-linus-6.11' of git://git.kernel.org/pub/scm/virt/kvm/kvm · d42f7708
      Linus Torvalds authored
      Pull kvm fix from Paolo Bonzini:
       "Do not always honor guest PAT on CPUs that support self-snoop.
      
        This triggers an issue in the bochsdrm driver, which used ioremap()
        instead of ioremap_wc() to map the video RAM.
      
        The revert lets video RAM use the WB memory type instead of the slower
        UC memory type"
      
      * tag 'for-linus-6.11' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        Revert "KVM: VMX: Always honor guest PAT on CPUs that support self-snoop"
      d42f7708
    • Paolo Bonzini's avatar
      Revert "KVM: VMX: Always honor guest PAT on CPUs that support self-snoop" · 9d70f3fe
      Paolo Bonzini authored
      This reverts commit 377b2f35.
      
      This caused a regression with the bochsdrm driver, which used ioremap()
      instead of ioremap_wc() to map the video RAM.  After the commit, the
      WB memory type is used without the IGNORE_PAT, resulting in the slower
      UC memory type.  In fact, UC is slow enough to basically cause guests
      to not boot... but only on new processors such as Sapphire Rapids and
      Cascade Lake.  Coffee Lake for example works properly, though that might
      also be an effect of being on a larger, more NUMA system.
      
      The driver has been fixed but that does not help older guests.  Until we
      figure out whether Cascade Lake and newer processors are working as
      intended, revert the commit.  Long term we might add a quirk, but the
      details depend on whether the processors are working as intended: for
      example if they are, the quirk might reference bochs-compatible devices,
      e.g. in the name and documentation, so that userspace can disable the
      quirk by default and only leave it enabled if such a device is being
      exposed to the guest.
      
      If instead this is actually a bug in CLX+, then the actions we need to
      take are different and depend on the actual cause of the bug.
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      9d70f3fe
  3. 14 Sep, 2024 4 commits
  4. 13 Sep, 2024 22 commits
  5. 12 Sep, 2024 7 commits