linux/arch/x86/xen
Konrad Rzeszutek Wilk acd049c6e9 xen/setup: Fix for incorrect xen_extra_mem_start.
The earlier attempts (24bdb0b62c)
at fixing this problem caused other problems to surface (PV guests
with no PCI passthrough would have SWIOTLB turned on - which meant
64MB of precious contingous DMA32 memory being eaten up per guest).
The problem was: "on xen we add an extra memory region at the end of
the e820, and on this particular machine this extra memory region
would start below 4g and cross over the 4g boundary:

[0xfee01000-0x192655000)

Unfortunately e820_end_of_low_ram_pfn does not expect an
e820 layout like that so it returns 4g, therefore initial_memory_mapping
will map [0 - 0x100000000), that is a memory range that includes some
reserved memory regions."

The memory range was the IOAPIC regions, and with the 1-1 mapping
turned on, it would map them as RAM, not as MMIO regions. This caused
the hypervisor to complain. Fortunately this is experienced only under
the initial domain so we guard for it.

Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-06-16 13:51:32 -04:00
..
debugfs.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
debugfs.h xen: add debugfs support 2008-08-21 13:52:58 +02:00
enlighten.c xen: When calling power_off, don't call the halt function. 2011-06-15 16:48:29 -04:00
grant-table.c xen: make grant table arch portable 2008-04-24 23:57:32 +02:00
irq.c arch/x86/xen/irq: Cleanup code/data sections definitions 2011-05-12 17:19:33 -04:00
Kconfig fix XEN_SAVE_RESTORE Kconfig dependencies 2011-04-11 22:54:48 +02:00
Makefile xen: move p2m handling to separate file 2011-01-11 14:31:07 -05:00
mmu.c xen: support CONFIG_MAXSMP 2011-06-15 14:18:49 -04:00
mmu.h xen: make a pile of mmu pvop functions static 2011-05-20 14:25:24 -07:00
multicalls.c xen: off by one errors in multicalls.c 2011-06-03 16:04:02 -04:00
multicalls.h xen: Use this_cpu_ops 2010-12-17 15:07:19 +01:00
p2m.c Merge branches 'stable/irq', 'stable/p2m.bugfixes', 'stable/e820.bugfixes' and 'stable/mmu.bugfixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2011-05-19 16:14:58 -07:00
pci-swiotlb-xen.c treewide: fix a few typos in comments 2011-05-10 10:16:21 +02:00
platform-pci-unplug.c xen: unplug the emulated devices at resume time 2010-12-02 14:40:53 +00:00
setup.c xen/setup: Fix for incorrect xen_extra_mem_start. 2011-06-16 13:51:32 -04:00
smp.c xen: support CONFIG_MAXSMP 2011-06-15 14:18:49 -04:00
spinlock.c xen: Use this_cpu_ops 2010-12-17 15:07:19 +01:00
suspend.c xen: suspend: add "arch" to pre/post suspend hooks 2011-02-25 16:43:12 +00:00
time.c Merge branch 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-05-19 17:44:13 -07:00
vdso.h
xen-asm.h xen: make direct versions of irq_enable/disable/save/restore to common code 2009-02-04 16:59:04 -08:00
xen-asm.S x86: style cleanups for xen assemblies 2009-02-05 20:25:41 +01:00
xen-asm_32.S percpu: remove per_cpu__ prefix. 2009-10-29 22:34:15 +09:00
xen-asm_64.S xen: use iret for return from 64b kernel to 32b usermode 2009-12-03 11:14:54 -08:00
xen-head.S x86, asm: Cleanup unnecssary macros in asm-offsets.c 2011-02-25 16:37:32 -08:00
xen-ops.h arch/x86/xen/xen-ops: Cleanup code/data sections definitions 2011-05-19 11:30:39 -04:00