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| author | Juan Quintela | 2010-09-02 16:45:43 +0200 |
|---|---|---|
| committer | Stefano Stabellini | 2010-10-22 22:25:47 +0200 |
| commit | 4ec5387cc36c6472a2ff2c82e9865abe8cab96c2 (patch) | |
| tree | 3694b8348b60b084c42abaf590f3db47d6d97b0e /arch/x86/xen/setup.c | |
| parent | xen: Initialize xenbus for dom0. (diff) | |
| download | kernel-qcow2-linux-4ec5387cc36c6472a2ff2c82e9865abe8cab96c2.tar.gz kernel-qcow2-linux-4ec5387cc36c6472a2ff2c82e9865abe8cab96c2.tar.xz kernel-qcow2-linux-4ec5387cc36c6472a2ff2c82e9865abe8cab96c2.zip | |
xen: add the direct mapping area for ISA bus access
add the direct mapping area for ISA bus access when running as initial
domain
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86/xen/setup.c')
| -rw-r--r-- | arch/x86/xen/setup.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index c413132702f7..62ceb7864017 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -119,6 +119,9 @@ char * __init xen_memory_setup(void) * Even though this is normal, usable memory under Xen, reserve * ISA memory anyway because too many things think they can poke * about in there. + * + * In a dom0 kernel, this region is identity mapped with the + * hardware ISA area, so it really is out of bounds. */ e820_add_region(ISA_START_ADDRESS, ISA_END_ADDRESS - ISA_START_ADDRESS, E820_RESERVED); |