mirror of https://github.com/acidanthera/audk.git
c68d3a6978
The logic we have in place for i440fx does not work reliably on q35. For example, if the guest has 2GB of RAM, we allow the PCI root bridge driver to allocate the legacy video RAM BAR from the [2048 MB, 2816 MB] range, which falls strictly outside of the Q35 PCI host MMIO aperture that QEMU configures, and advertizes in ACPI. In turn, PCI BARs that exist outside of the PCI host aperture that is exposed in ACPI break Windows guests. Allocating PCI MMIO resources at or above 3GB on Q35 ensures that we stay within QEMU's aperture. (See the "w32.begin" assignments in "hw/pci-host/q35.c".) Furthermore, in pc_q35_init() (file "hw/i386/pc_q35.c"), QEMU ensures that the low RAM never "leaks" above 3GB. The i440fx logic is left unchanged. The Windows guest malfunction on Q35 was reported by Jon Panozzo of Lime Technology, Inc. Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Igor Mammedov <imammedo@redhat.com> Cc: Jon Panozzo <jonp@lime-technology.com> Cc: "Gabriel L. Somlo" <somlo@cmu.edu> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> Tested-by: Jonathan Panozzo <jonp@lime-technology.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18393 6f19259b-4bc3-4df7-8a09-765794883524 |
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| .. | ||
| Cmos.c | ||
| Cmos.h | ||
| Fv.c | ||
| MemDetect.c | ||
| Platform.c | ||
| Platform.h | ||
| PlatformPei.inf | ||
| Xen.c | ||
| Xen.h | ||