Re: [PATCH] arm64: Enable PCI write-combine resources under sysfs

2020-09-02 Thread Will Deacon
On Wed, Sep 02, 2020 at 09:22:53AM +1000, Benjamin Herrenschmidt wrote: > On Tue, 2020-09-01 at 13:37 -0500, Bjorn Helgaas wrote: > > On Mon, Aug 31, 2020 at 03:18:27PM +, Clint Sbisa wrote: > > > Using write-combine is crucial for performance of PCI devices where > > > significant amounts of

Re: [PATCH] arm64: Enable PCI write-combine resources under sysfs

2020-09-01 Thread Benjamin Herrenschmidt
On Tue, 2020-09-01 at 13:37 -0500, Bjorn Helgaas wrote: > On Mon, Aug 31, 2020 at 03:18:27PM +, Clint Sbisa wrote: > > Using write-combine is crucial for performance of PCI devices where > > significant amounts of transactions go over PCI BARs. > > > > arm64 supports write-combine PCI

Re: [PATCH] arm64: Enable PCI write-combine resources under sysfs

2020-08-31 Thread Clint Sbisa
On Fri, Aug 21, 2020 at 03:51:54PM +, Clint Sbisa wrote: > Using write-combine is crucial for performance of PCI devices where > significant amounts of transactions go over PCI BARs. > > arm64 supports write-combine PCI mappings, so the appropriate define > has been added which will expose

Re: [PATCH] arm64: Enable PCI write-combine resources under sysfs

2020-08-27 Thread Clint Sbisa
On Fri, Aug 21, 2020 at 03:51:54PM +, Clint Sbisa wrote: > Using write-combine is crucial for performance of PCI devices where > significant amounts of transactions go over PCI BARs. > > arm64 supports write-combine PCI mappings, so the appropriate define > has been added which will expose

[PATCH] arm64: Enable PCI write-combine resources under sysfs

2020-08-21 Thread Clint Sbisa
Using write-combine is crucial for performance of PCI devices where significant amounts of transactions go over PCI BARs. arm64 supports write-combine PCI mappings, so the appropriate define has been added which will expose write-combine mappings under sysfs for prefetchable PCI resources.