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OvmfPkg: AcpiPlatformDxe: Don't enable unsupported PCI attributes 

Current code in PciEnableDecoding tries to unconditionally enable
EFI_PCI_IO_ATTRIBUTE_IO and EFI_PCI_IO_ATTRIBUTE_MEMORY even if they
are unsupported attributes. This fails on devices which don't
support both attributes.

This patch masks out unsupported attributes.

Information to reproduce the bug.

Host lspci -s 0000:04:00.0 -vnn:
04:00.0 USB controller [0c03]: Renesas Technology Corp. uPD720201 USB
3.0 Host Controller [1912:0014] (rev 03) (prog-if 30 [XHCI])
	Flags: fast devsel, IRQ 19
	Memory at ef900000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: [50] Power Management version 3
	Capabilities: [70] MSI: Enable- Count=1/8 Maskable- 64bit+
	Capabilities: [90] MSI-X: Enable- Count=8 Masked-
	Capabilities: [a0] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [150] Latency Tolerance Reporting
	Kernel driver in use: pci-stub
	Kernel modules: xhci_pci

libvirt xml:
    <hostdev mode='subsystem' type='pci' managed='yes'>
      <driver name='vfio'/>
      <source>
        <address domain='0x0000' bus='0x04' slot='0x00' function='0'/>
      </source>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x11'
       function='0'/>
    </hostdev>

OVMF debug log with additional DEBUG statement:
OnRootBridgesConnected: root bridges have been connected, installing
ACPI tables
Select Item: 0x19
EnablePciDecoding: GetLocation: D=0000:00:00.0
    OrigAttr=0000000000004000 SuppAttr=000000000000E700
EnablePciDecoding: GetLocation: D=0000:00:10.0
    OrigAttr=0000000000004000 SuppAttr=000000000000E700
EnablePciDecoding: GetLocation: D=0000:00:11.0
    OrigAttr=0000000000004000 SuppAttr=000000000000E600
EnablePciDecoding: EfiPciIoAttributeOperationEnable: Unsupported
Select Item: 0x28
Select Item: 0x19
Select Item: 0x2A
Select Item: 0x19
Select Item: 0x27
InstallQemuFwCfgTables: installed 6 tables

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Volker Rümelin 2016-04-18 21:51:30 +02:00 committed by Laszlo Ersek
parent 61ee1dff16
commit 90bb4c577d
1 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
OvmfPkg/AcpiPlatformDxe/PciDecoding.c
View File

@ -89,6 +89,7 @@ EnablePciDecoding (
for (Idx = 0; Idx < NoHandles; ++Idx) {
EFI_PCI_IO_PROTOCOL *PciIo;
UINT64 Attributes;
//
// Look up PciIo on the handle and stash it
@ -109,12 +110,23 @@ EnablePciDecoding (
goto RestoreAttributes;
}
//
// Retrieve supported attributes
//
Status = PciIo->Attributes (PciIo, EfiPciIoAttributeOperationSupported, 0,
&Attributes);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_WARN, "%a: EfiPciIoAttributeOperationSupported: %r\n",
__FUNCTION__, Status));
goto RestoreAttributes;
}
//
// Enable IO and MMIO decoding
//
Attributes &= EFI_PCI_IO_ATTRIBUTE_IO | EFI_PCI_IO_ATTRIBUTE_MEMORY;
Status = PciIo->Attributes (PciIo, EfiPciIoAttributeOperationEnable,
EFI_PCI_IO_ATTRIBUTE_IO | EFI_PCI_IO_ATTRIBUTE_MEMORY,
NULL);
Attributes, NULL);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_WARN, "%a: EfiPciIoAttributeOperationEnable: %r\n",
__FUNCTION__, Status));