Re: [Xen-devel] [PATCH RESEND 3/3] OvmfPkg/XenSupport: turn off address decoding before BAR sizing

[Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>]

On 06/03/2019 13:22, Laszlo Ersek wrote:
> On 03/06/19 13:40, Igor Druzhinin wrote:
>> On Xen, hvmloader firmware leaves address decoding enabled for
>> enumerated PCI device before jumping into OVMF. OVMF seems to
>> expect it to be disabled and tries to size PCI BARs in several places
>> without disabling it which causes BAR64, for example, being
>> incorrectly placed by QEMU.
>>
>> Fix it by disabling PCI address decoding explicitly before the
>> first attempt to size BARs on Xen.
>>
>> Contributed-under: TianoCore Contribution Agreement 1.1
>> Signed-off-by: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>
>> ---
>>  OvmfPkg/Library/PciHostBridgeLib/XenSupport.c | 34 
>> +++++++++++++++++++++++++++
>>  1 file changed, 34 insertions(+)
>>
>> diff --git a/OvmfPkg/Library/PciHostBridgeLib/XenSupport.c 
>> b/OvmfPkg/Library/PciHostBridgeLib/XenSupport.c
>> index 408fb24..9940335 100644
>> --- a/OvmfPkg/Library/PciHostBridgeLib/XenSupport.c
>> +++ b/OvmfPkg/Library/PciHostBridgeLib/XenSupport.c
>> @@ -55,6 +55,33 @@ PcatPciRootBridgeBarExisted (
>>    EnableInterrupts ();
>>  }
>>  
>> +#define EFI_PCI_COMMAND_DECODE ((UINT16)(EFI_PCI_COMMAND_IO_SPACE | \
>> +                                         EFI_PCI_COMMAND_MEMORY_SPACE))
> 
> I thought I asked you not to define a macro here that started with the
> "EFI_" prefix :/
> 
> http://mid.mail-archive.com/dd8e3c9e-cb76-d3fe-6a10-c0a41c714b56@xxxxxxxxxx
> 

This is a resend of v1 patch series to get Xen folks into CC and gather
comments. I expect v2.

Igor

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