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Re: [Qemu-devel] [PULL v2 00/50] virtio, vhost, pci, pc: features, clean


From: Michael S. Tsirkin
Subject: Re: [Qemu-devel] [PULL v2 00/50] virtio, vhost, pci, pc: features, cleanups
Date: Tue, 20 Mar 2018 17:51:29 +0200

On Tue, Mar 20, 2018 at 03:41:54PM +0000, Peter Maydell wrote:
> On 20 March 2018 at 15:05, Michael S. Tsirkin <address@hidden> wrote:
> > I'm curious why does it take that path though.
> > Here's the rule
> >
> > #if defined(__linux__) && defined(__NR_userfaultfd) && 
> > defined(CONFIG_EVENTFD)
> >
> > If it's Linux we'll pick our own copy of the header
> > and so __NR_userfaultfd is defined.
> >
> > CONFIG_EVENTFD is not set?
> 
> CONFIG_EVENTFD is set. __NR_userfaultfd is not. It isn't
> defined in the system headers, and it's not defined in
> our linux-headers/asm-arm64/. Only x86, s390, powerpc
> and arm (32-bit) define it. I suspect the build would also
> fail on MIPS if I had a mips host in the build set.
> 
> thanks
> -- PMM

Let's update headers for arm and mips then?

-- 
MST



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