[v3,0/2] x86/pci: reduce PCI accesses

Message

Roger Pau Monné March 10, 2025, 9:55 a.m. UTC

Hello,

First patch is not really related, but it's some cleanup I've found
while looking at the other fixes.  Patch 2 extends the IOMMU logic to
prevent re-writing the same MSI message.

Thanks, Roger.

Roger Pau Monne (2):
  x86/apic: remove delivery and destination mode fields from drivers
  x86/iommu: avoid MSI address and data writes if IRT index hasn't
    changed

 xen/arch/x86/genapic/bigsmp.c            |  2 --
 xen/arch/x86/genapic/default.c           |  2 --
 xen/arch/x86/genapic/x2apic.c            |  4 ----
 xen/arch/x86/hpet.c                      |  6 +++++-
 xen/arch/x86/hvm/vmx/vmx.c               |  4 +++-
 xen/arch/x86/include/asm/genapic.h       |  5 -----
 xen/arch/x86/io_apic.c                   | 16 ++++++++--------
 xen/arch/x86/msi.c                       | 22 +++++++++-------------
 xen/drivers/passthrough/amd/iommu_intr.c |  4 ++--
 xen/drivers/passthrough/vtd/intremap.c   |  4 +++-
 xen/include/xen/iommu.h                  |  6 ++++++
 11 files changed, 36 insertions(+), 39 deletions(-)