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| author | Michael Holzheu <holzheu@linux.vnet.ibm.com> | 2011-10-30 15:16:44 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2011-10-30 15:16:42 +0100 |
| commit | dab7a7b1538fec48790a321a58180adae79a3f3c (patch) | |
| tree | 145614bdf89a106508cec17bd6f13e6686ffed07 /arch/s390/include | |
| parent | 558df7209e7997275f6b8ad37737494cf2da1512 (diff) | |
| download | op-kernel-dev-dab7a7b1538fec48790a321a58180adae79a3f3c.zip op-kernel-dev-dab7a7b1538fec48790a321a58180adae79a3f3c.tar.gz | |
[S390] Add architecture code for unmapping crashkernel memory
This patch implements the crash_map_pages() function for s390.
KEXEC_CRASH_MEM_ALIGN is set to HPAGE_SIZE, in order to support
kernel mappings that use large pages. We also use HPAGE_SIZE alignment
for CONFIG_HUGETLB_PAGE=n in order to have the same 1 MiB alignment on
all s390 systems.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/kexec.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/include/asm/kexec.h b/arch/s390/include/asm/kexec.h index fb1c96f..cf4e47b 100644 --- a/arch/s390/include/asm/kexec.h +++ b/arch/s390/include/asm/kexec.h @@ -36,6 +36,9 @@ /* Allocate one page for the pdp and the second for the code */ #define KEXEC_CONTROL_PAGE_SIZE 4096 +/* Alignment of crashkernel memory */ +#define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE + /* The native architecture */ #define KEXEC_ARCH KEXEC_ARCH_S390 |
