2
0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-24 13:13:57 +08:00
linux-next/arch/powerpc
Gavin Shan 9fcd6f4a2b powerpc/powernv: Allocate PE# in reverse order
PE number for one particular PE can be allocated dynamically or
reserved according to the consumed M64 (64-bits prefetchable)
segments of the PE. The M64 segment can't be remapped to arbitrary
PE, meaning the PE number is determined according to the index
of the consumed M64 segment. As below figure shows, M64 resource
grows from low to high end, meaning the PE (number) reserved
according to M64 segment grows from low to high end as well,
so does the dynamically allocated PE number. It will lead to
conflict: PE number (M64 segment) reserved by dynamic allocation
is required by hot added PCI adapter at later point. It fails
the PCI hotplug because of the PE number can't be reserved
based on the index of the consumed M64 segment.

  +---+---+---+---+---+--------------------------------+-----+
  | 0 | 1 | 2 | 3 | 4 |      .......                   | 255 |
  +---+---+---+---+---+--------------------------------+-----+

  PE number for dynamic allocation          ----------------->
  PE number reserved for M64 segment        ----------------->

To resolve above conflicts, this forces the PE number to be
allocated dynamically in reverse order. With this patch applied,
the PE numbers are reserved in ascending order, but allocated
dynamically in reverse order.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-06-21 15:30:53 +10:00
..
boot Merge branch 'for-4.7-dw' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2016-05-23 18:19:21 -07:00
configs powerpc updates for 4.6 2016-03-19 15:38:41 -07:00
crypto powerpc: Various typo fixes 2016-06-14 13:58:26 +10:00
include powerpc/pci: Override pcibios_setup_bridge() 2016-06-21 15:30:52 +10:00
kernel powerpc/pci: Override pcibios_setup_bridge() 2016-06-21 15:30:52 +10:00
kvm powerpc: Define and use PPC64_ELF_ABI_v2/v1 2016-06-14 13:58:27 +10:00
lib powerpc: Introduce asm-prototypes.h 2016-06-16 22:39:54 +10:00
math-emu powerpc: Correct emulated mtfsf instruction 2014-04-07 10:33:11 +10:00
mm powerpc/mm: Ensure "special" zones are empty 2016-06-16 16:03:21 +10:00
net net: filter: make JITs zero A for SKF_AD_ALU_XOR_X 2016-01-06 00:43:52 -05:00
oprofile powerpc: Various typo fixes 2016-06-14 13:58:26 +10:00
perf powerpc: Various typo fixes 2016-06-14 13:58:26 +10:00
platforms powerpc/powernv: Allocate PE# in reverse order 2016-06-21 15:30:53 +10:00
scripts powerpc/ftrace: Add Kconfig & Make glue for mprofile-kernel 2016-03-07 14:53:56 +11:00
sysdev DAX error handling for 4.7 2016-05-26 19:34:26 -07:00
xmon powerpc/xmon: Fix SPR read/write commands and add command to dump SPRs 2016-05-11 21:54:07 +10:00
Kconfig printk/nmi: generic solution for safe printk in NMI 2016-05-20 17:58:30 -07:00
Kconfig.debug powerpc/mm: Always use STRICT_MM_TYPECHECKS 2016-05-01 18:32:14 +10:00
Makefile Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/scottwood/linux into next 2016-03-14 20:05:14 +11:00
relocs_check.sh powerpc: Convert relocs_check to a shell script using grep 2015-03-23 14:47:39 +11:00