Date: Sun, 20 Nov 2011 22:41:00 -0600 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: Peter Grehan <grehan@freebsd.org> Cc: svn-src-projects@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r227772 - in projects/pseries: amd64/amd64 amd64/conf amd64/ia32 amd64/include amd64/linux32 arm/arm arm/at91 arm/conf arm/econa arm/include arm/mv arm/sa11x0 arm/xscale/i80321 arm/xsca... Message-ID: <4EC9D65C.6050106@freebsd.org> In-Reply-To: <4EC98E99.9000601@freebsd.org> References: <201111202147.pAKLlR0i010700@svn.freebsd.org> <4EC98E99.9000601@freebsd.org>
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On 11/20/11 17:34, Peter Grehan wrote: > Hi Nathan, > >> IFC @ r227771. Of particular interest here are virtio drivers, which >> should be useful for the QEMU pSeries emulation. > > One thing to look out for is that the virtio spec has PCI register > access in host-order, so you may need to switch in big-endian bus ops. > > later, > > Peter. Is it worth making some generic way to avoid regular bus accessors? It also needs to avoid regular bus dma calls, since the spec indicates finger-of-God accesses that bypass any emulated IOMMU that busdma would ordinarily try to use. -Nathan
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