Hi,
KVM-86 IOMMU uses features available since 2.6.30-rcXX, attached patch
disables its compilation on older kernels. I'm not sure if this is the
best way to disable it, but You can use it as a workaround.
Avi, is this OK? if so, please apply.
nik
diff -Naur kvm-kmod-devel-86/external-module-compat-comm.h kvm-kmod-devel-86-disable-iommu-for-old-kernels/external-module-compat-comm.h
--- kvm-kmod-devel-86/external-module-compat-comm.h 2009-05-20 15:59:56.000000000 +0200
+++ kvm-kmod-devel-86-disable-iommu-for-old-kernels/external-module-compat-comm.h 2009-05-20 22:37:23.632038570 +0200
@@ -791,3 +791,7 @@
}
#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30)
+#undef CONFIG_IOMMU_API
+#endif
diff -Naur kvm-kmod-devel-86/x86/iommu.c kvm-kmod-devel-86-disable-iommu-for-old-kernels/x86/iommu.c
--- kvm-kmod-devel-86/x86/iommu.c 2009-05-20 16:00:00.000000000 +0200
+++ kvm-kmod-devel-86-disable-iommu-for-old-kernels/x86/iommu.c 2009-05-20 22:37:43.840878726 +0200
@@ -1,3 +1,4 @@
+#ifdef CONFIG_IOMMU_API
#ifndef KVM_UNIFDEF_H
#define KVM_UNIFDEF_H
@@ -271,3 +272,4 @@
iommu_domain_free(domain);
return 0;
}
+#endif
On Wed, May 20, 2009 at 10:30:22PM +0200, Nikola Ciprich wrote:
> Hi Rene,
> as a workaround, You can disable
> AMD IOMMU support (AMD_IOMMU) and
> Support for DMA Remapping Devices (EXPERIMENTAL) (DMAR)
> in Your host kernel.
> I'll post patch to disable KVM IOMMU support for kernels <2.6.30 soon.
> BR
> nik
>
> On Wed, May 20, 2009 at 07:48:59PM +0200, René Pfeiffer wrote:
> > Hello!
> >
> > I just tried to compile kvm-86 on two test machines and I get the
> > following error:
> >
> > [...]
> > CC [M] /usr/src/build/kvm-86/kvm/kernel/x86/iommu.o
> > /usr/src/build/kvm-86/kvm/kernel/x86/iommu.c: In function ‘kvm_iommu_map_pages’:
> > /usr/src/build/kvm-86/kvm/kernel/x86/iommu.c:90: error: ‘IOMMU_CACHE’ undeclared (first use in this function)
> > /usr/src/build/kvm-86/kvm/kernel/x86/iommu.c:90: error: (Each undeclared identifier is reported only once
> > /usr/src/build/kvm-86/kvm/kernel/x86/iommu.c:90: error: for each function it appears in.)
> > /usr/src/build/kvm-86/kvm/kernel/x86/iommu.c: In function ‘kvm_assign_device’:
> > /usr/src/build/kvm-86/kvm/kernel/x86/iommu.c:155: error: implicit declaration of function ‘iommu_domain_has_cap’
> > /usr/src/build/kvm-86/kvm/kernel/x86/iommu.c:156: error: ‘IOMMU_CAP_CACHE_COHERENCY’ undeclared (first use in this function)
> > make[4]: *** [/usr/src/build/kvm-86/kvm/kernel/x86/iommu.o] Error 1
> > make[3]: *** [/usr/src/build/kvm-86/kvm/kernel/x86] Error 2
> > make[2]: *** [_module_/usr/src/build/kvm-86/kvm/kernel] Error 2
> > make[1]: *** [all] Error 2
> > make: *** [kvm-kmod] Error 2
> >
> > Both machines run Debian Lenny with a custom kernel (2.6.29.1 and
> > 2.6.29.3). One machine is Intel-based (Core2Duo), one is AMD-based. Both
> > compiled earlier versions of kvm just fine. configure was run without
> > options.
> >
> > Best,
> > René.
> >
> > --
> > )\._.,--....,'``. fL Let GNU/Linux work for you while you take a nap.
> > /, _.. \ _\ (`._ ,. R. Pfeiffer <lynx at luchs.at> + http://web.luchs.at/
> > `._.-(,_..'--(,_..'`-.;.' - System administration + Consulting + Teaching -
> > Got mail delivery problems? http://web.luchs.at/information/blockedmail.php
>
>
>
> --
> -------------------------------------
> Nikola CIPRICH
> LinuxBox.cz, s.r.o.
> 28. rijna 168, 709 01 Ostrava
>
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> fax: +420 596 621 273
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>
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>
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--
-------------------------------------
Nikola CIPRICH
LinuxBox.cz, s.r.o.
28. rijna 168, 709 01 Ostrava
tel.: +420 596 603 142
fax: +420 596 621 273
mobil: +420 777 093 799
www.linuxbox.cz
mobil servis: +420 737 238 656
email servis: servis@xxxxxxxxxxx
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