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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 12:43:55 +08:00
linux-next/arch/powerpc
Hari Bathini a77af552cc powerpc/fadump: avoid duplicates in crash memory ranges
fadump sets up crash memory ranges to be used for creating PT_LOAD
program headers in elfcore header. Memory chunk RMA_START through
boot memory area size is added as the first memory range because
firmware, at the time of crash, moves this memory chunk to different
location specified during fadump registration making it necessary to
create a separate program header for it with the correct offset.
This memory chunk is skipped while setting up the remaining memory
ranges. But currently, there is possibility that some of this memory
may have duplicate entries like when it is hot-removed and added
again. Ensure that no two memory ranges represent the same memory.

When 5 lmbs are hot-removed and then hot-plugged before registering
fadump, here is how the program headers in /proc/vmcore exported by
fadump look like

without this change:

  Program Headers:
    Type           Offset             VirtAddr           PhysAddr
                   FileSiz            MemSiz              Flags  Align
    NOTE           0x0000000000010000 0x0000000000000000 0x0000000000000000
                   0x0000000000001894 0x0000000000001894         0
    LOAD           0x0000000000021020 0xc000000000000000 0x0000000000000000
                   0x0000000040000000 0x0000000040000000  RWE    0
    LOAD           0x0000000040031020 0xc000000000000000 0x0000000000000000
                   0x0000000010000000 0x0000000010000000  RWE    0
    LOAD           0x0000000050040000 0xc000000010000000 0x0000000010000000
                   0x0000000050000000 0x0000000050000000  RWE    0
    LOAD           0x00000000a0040000 0xc000000060000000 0x0000000060000000
                   0x000000019ffe0000 0x000000019ffe0000  RWE    0

and with this change:

  Program Headers:
    Type           Offset             VirtAddr           PhysAddr
                   FileSiz            MemSiz              Flags  Align
    NOTE           0x0000000000010000 0x0000000000000000 0x0000000000000000
                   0x0000000000001894 0x0000000000001894         0
    LOAD           0x0000000000021020 0xc000000000000000 0x0000000000000000
                   0x0000000040000000 0x0000000040000000  RWE    0
    LOAD           0x0000000040030000 0xc000000040000000 0x0000000040000000
                   0x0000000020000000 0x0000000020000000  RWE    0
    LOAD           0x0000000060030000 0xc000000060000000 0x0000000060000000
                   0x000000019ffe0000 0x000000019ffe0000  RWE    0

Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Reviewed-by: Mahesh J Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-06-28 13:08:09 +10:00
..
boot powerpc/64: Do not link crtsaveres.o in boot 2017-05-30 14:59:51 +10:00
configs powerpc/44x/fsp2: Add defconfig for FSP2 board 2017-05-30 14:59:51 +10:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2017-05-02 15:53:46 -07:00
include powerpc/powernv/pci: Add support for PHB4 diagnostics 2017-06-27 12:14:27 +10:00
kernel powerpc/fadump: avoid duplicates in crash memory ranges 2017-06-28 13:08:09 +10:00
kvm powerpc/mm: Trace tlbie(l) instructions 2017-06-23 21:14:49 +10:00
lib powerpc/lib/xor_vmx: Ensure no altivec code executes before enable_kernel_altivec() 2017-06-02 20:17:52 +10:00
math-emu Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mm powerpc: Only do ERAT invalidate on radix context switch on P9 DD1 2017-06-27 14:15:54 +10:00
net powerpc updates for 4.11 part 1. 2017-02-22 10:30:38 -08:00
oprofile ktime: Cleanup ktime_set() usage 2016-12-25 17:21:22 +01:00
perf powerpc/perf: Fix branch event code for power9 2017-06-28 13:08:08 +10:00
platforms powerpc/powernv/pci: Enable 64-bit devices to access >4GB DMA space 2017-06-27 12:14:28 +10:00
purgatory kexec, x86/purgatory: Unbreak it and clean it up 2017-03-10 20:55:09 +01:00
sysdev powerpc/xive: Silence message about VP block allocation 2017-06-28 13:08:08 +10:00
tools powerpc/64: Tool to check head sections location sanity 2017-05-30 14:59:51 +10:00
xmon powerpc/xmon: Fix compile error with PPC_8xx=y 2017-05-30 14:59:51 +10:00
Kconfig powerpc: Convert VDSO update function to use new update_vsyscall interface 2017-06-22 16:26:23 +10:00
Kconfig.debug powerpc/xmon: Enable disassembly files (compilation changes) 2017-02-15 20:02:42 +11:00
Makefile powerpc: Link warning for orphan sections 2017-05-30 14:59:51 +10:00
Makefile.postlink powerpc/64: Tool to check head sections location sanity 2017-05-30 14:59:51 +10:00