OpenCloudOS-Kernel/arch
Konrad Rzeszutek Wilk bd49940a35 xen/boot: Disable BIOS SMP MP table search.
As the initial domain we are able to search/map certain regions
of memory to harvest configuration data. For all low-level we
use ACPI tables - for interrupts we use exclusively ACPI _PRT
(so DSDT) and MADT for INT_SRC_OVR.

The SMP MP table is not used at all. As a matter of fact we do
not even support machines that only have SMP MP but no ACPI tables.

Lets follow how Moorestown does it and just disable searching
for BIOS SMP tables.

This also fixes an issue on HP Proliant BL680c G5 and DL380 G6:

9f->100 for 1:1 PTE
Freeing 9f-100 pfn range: 97 pages freed
1-1 mapping on 9f->100
.. snip..
e820: BIOS-provided physical RAM map:
Xen: [mem 0x0000000000000000-0x000000000009efff] usable
Xen: [mem 0x000000000009f400-0x00000000000fffff] reserved
Xen: [mem 0x0000000000100000-0x00000000cfd1dfff] usable
.. snip..
Scan for SMP in [mem 0x00000000-0x000003ff]
Scan for SMP in [mem 0x0009fc00-0x0009ffff]
Scan for SMP in [mem 0x000f0000-0x000fffff]
found SMP MP-table at [mem 0x000f4fa0-0x000f4faf] mapped at [ffff8800000f4fa0]
(XEN) mm.c:908:d0 Error getting mfn 100 (pfn 5555555555555555) from L1 entry 0000000000100461 for l1e_owner=0, pg_owner=0
(XEN) mm.c:4995:d0 ptwr_emulate: could not get_page_from_l1e()
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: [<ffffffff81ac07e2>] xen_set_pte_init+0x66/0x71
. snip..
Pid: 0, comm: swapper Not tainted 3.6.0-rc6upstream-00188-gb6fb969-dirty #2 HP ProLiant BL680c G5
.. snip..
Call Trace:
 [<ffffffff81ad31c6>] __early_ioremap+0x18a/0x248
 [<ffffffff81624731>] ? printk+0x48/0x4a
 [<ffffffff81ad32ac>] early_ioremap+0x13/0x15
 [<ffffffff81acc140>] get_mpc_size+0x2f/0x67
 [<ffffffff81acc284>] smp_scan_config+0x10c/0x136
 [<ffffffff81acc2e4>] default_find_smp_config+0x36/0x5a
 [<ffffffff81ac3085>] setup_arch+0x5b3/0xb5b
 [<ffffffff81624731>] ? printk+0x48/0x4a
 [<ffffffff81abca7f>] start_kernel+0x90/0x390
 [<ffffffff81abc356>] x86_64_start_reservations+0x131/0x136
 [<ffffffff81abfa83>] xen_start_kernel+0x65f/0x661
(XEN) Domain 0 crashed: 'noreboot' set - not rebooting.

which is that ioremap would end up mapping 0xff using _PAGE_IOMAP
(which is what early_ioremap sticks as a flag) - which meant
we would get MFN 0xFF (pte ff461, which is OK), and then it would
also map 0x100 (b/c ioremap tries to get page aligned request, and
it was trying to map 0xf4fa0 + PAGE_SIZE - so it mapped the next page)
as _PAGE_IOMAP. Since 0x100 is actually a RAM page, and the _PAGE_IOMAP
bypasses the P2M lookup we would happily set the PTE to 1000461.
Xen would deny the request since we do not have access to the
Machine Frame Number (MFN) of 0x100. The P2M[0x100] is for example
0x80140.

CC: stable@vger.kernel.org
Fixes-Oracle-Bugzilla: https://bugzilla.oracle.com/bugzilla/show_bug.cgi?id=13665
Acked-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-09-19 15:28:28 -04:00
..
alpha Merge branch 'pci/myron-pcibios_setup' into next 2012-07-05 15:31:05 -06:00
arm Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2012-07-26 13:00:59 -07:00
avr32 fixups for signal breakage 2012-06-04 17:47:34 -04:00
blackfin Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-07-24 10:01:50 -07:00
c6x Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-07-24 10:01:50 -07:00
cris cris/PCI: factor out pcibios_setup() 2012-07-05 15:09:07 -06:00
frv frv/PCI: move fixup hooks from __init to __devinit 2012-06-12 09:10:55 -06:00
h8300 h8300/uaccess: add mising __clear_user() 2012-07-11 16:04:46 -07:00
hexagon hexagon: SMP: Remove call to ipi_call_lock()/ipi_call_unlock() 2012-06-05 17:27:11 +02:00
ia64 IOMMU Updates for Linux v3.6-rc1 2012-07-24 16:24:11 -07:00
m32r Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-07-22 11:22:15 -07:00
m68k Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu 2012-07-24 17:20:51 -07:00
microblaze PCI changes for the 3.6 merge window: 2012-07-24 16:17:07 -07:00
mips PCI changes for the 3.6 merge window: 2012-07-24 16:17:07 -07:00
mn10300 Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-07-22 11:22:15 -07:00
openrisc new helper: signal_delivered() 2012-06-01 12:58:52 -04:00
parisc PCI changes for the 3.6 merge window: 2012-07-24 16:17:07 -07:00
powerpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2012-07-26 13:00:59 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2012-07-26 13:00:59 -07:00
score new helper: signal_delivered() 2012-06-01 12:58:52 -04:00
sh Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2012-07-24 17:12:54 -07:00
sparc PCI changes for the 3.6 merge window: 2012-07-24 16:17:07 -07:00
tile PCI changes for the 3.6 merge window: 2012-07-24 16:17:07 -07:00
um Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-07-19 11:17:30 -07:00
unicore32 PCI changes for the 3.6 merge window: 2012-07-24 16:17:07 -07:00
x86 xen/boot: Disable BIOS SMP MP table search. 2012-09-19 15:28:28 -04:00
xtensa PCI changes for the 3.6 merge window: 2012-07-24 16:17:07 -07:00
.gitignore
Kconfig Merge branch 'for-linus' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping 2012-05-25 09:18:59 -07:00