Re: [edk2] [Patch] MdeModulePkg: Enhance PciBusDxe to handle high 32bit of MEM64 BAR returns 0

Reviewed-by: Eric Dong -Original Message- From: Ni, Ruiyu Sent: Thursday, July 30, 2015 11:11 AM To: edk2-devel@lists.01.org Cc: Ni, Ruiyu; Dong, Eric Subject: [Patch] MdeModulePkg: Enhance PciBusDxe to handle high 32bit of MEM64 BAR returns 0 According to the PCI spec, when software w

[edk2] [Patch] MdeModulePkg: Enhance PciBusDxe to handle high 32bit of MEM64 BAR returns 0

According to the PCI spec, when software writes all-one to BAR for size probing, the value read back should be 0b1...10...0 after masking the BAR type bits. But in real world, it's possible that certain device returns 0b0...01...10...0 for MEM64 BAR size probing: some bits in the high 32bit may be