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PcAtChipsetPkg/PciHostBridgeDxe: Improve KVM FIFO I/O read/write performance

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KVM can substantially boost the speed of the rep insb/insw/insl
and rep outsb/outsw/outsl instructions by transferring up to
a page of data per VM trap.

This change adds assembly handling of the PCI Host Bridge
I/O FIFO Reads and Writes.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13424 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jljusten
2012-06-01 17:07:00 +00:00
parent 2ea3b92055
commit 1fd376d979
7 changed files with 747 additions and 0 deletions
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8
PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
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@@ -43,6 +43,14 @@
PciRootBridgeIo.c
PciHostBridge.h
[Sources.IA32]
Ia32/IoFifo.asm
Ia32/IoFifo.S
[Sources.X64]
X64/IoFifo.asm
X64/IoFifo.S
[Protocols]
gEfiPciHostBridgeResourceAllocationProtocolGuid
gEfiPciRootBridgeIoProtocolGuid