Date: Fri, 1 Nov 2019 02:08:02 +0100 From: Marcin Wojtas <mw@semihalf.com> To: John Baldwin <jhb@freebsd.org> Cc: Marcin Wojtas <mw@freebsd.org>, src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r354218 - head/sys/dev/ena Message-ID: <CAPv3WKf1MTUk3bg_1=Agi2Utmq3beS2GFf5aFbE4Lb3Rh9kOug@mail.gmail.com> In-Reply-To: <2fc49b6e-0294-cb5f-bbca-8a53f6aba036@FreeBSD.org> References: <201910311538.x9VFcHPE053035@repo.freebsd.org> <2fc49b6e-0294-cb5f-bbca-8a53f6aba036@FreeBSD.org>
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Hi John, Sure, will be happy to test. Please let me know and cc mk@semihalf.com. Best regards, Marcin pt., 1 lis 2019 o 01:04 John Baldwin <jhb@freebsd.org> napisa=C5=82(a): > On 10/31/19 8:38 AM, Marcin Wojtas wrote: > > Author: mw > > Date: Thu Oct 31 15:38:17 2019 > > New Revision: 354218 > > URL: https://svnweb.freebsd.org/changeset/base/354218 > > > > Log: > > Add WC support for arm64 in the ENA driver > > > > As the pmamp_change_attr() is public on arm64 since r351131, it can b= e > > used on the arm64 to map memory range as with the write combined > > attribute. > > > > It requires the driver to use generic VM_MEMATTR_WRITE_COMBINING flag > > instead of the x86 specific PAT_WRITE_COMBINING. > > > > Differential Revision: https://reviews.freebsd.org/D21931 > > Submitted by: Michal Krawczyk <mk@semihalf.com> > > Obtained from: Semihalf > > Sponsored by: Amazon, Inc. > > This isn't the right API for this, but the right API isn't ready yet on > arm64. I have a patch to add bus_map_resource support on all platforms > that I'm working on testing, and that will be the right way to request > this in the future once it lands. > > -- > -- > John Baldwin >
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