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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/kernel/setup.c | |
| parent | 558df7209e7997275f6b8ad37737494cf2da1512 (diff) | |
| download | lwn-dab7a7b1538fec48790a321a58180adae79a3f3c.tar.gz lwn-dab7a7b1538fec48790a321a58180adae79a3f3c.zip | |
[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/kernel/setup.c')
| -rw-r--r-- | arch/s390/kernel/setup.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 63c81de665ec..6f8e3777a0c8 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -446,6 +446,7 @@ static void __init setup_resources(void) res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; switch (memory_chunk[i].type) { case CHUNK_READ_WRITE: + case CHUNK_CRASHK: res->name = "System RAM"; break; case CHUNK_READ_ONLY: @@ -720,8 +721,8 @@ static void __init reserve_crashkernel(void) &crash_base); if (rc || crash_size == 0) return; - crash_base = PAGE_ALIGN(crash_base); - crash_size = PAGE_ALIGN(crash_size); + crash_base = ALIGN(crash_base, KEXEC_CRASH_MEM_ALIGN); + crash_size = ALIGN(crash_size, KEXEC_CRASH_MEM_ALIGN); if (register_memory_notifier(&kdump_mem_nb)) return; if (!crash_base) @@ -741,7 +742,7 @@ static void __init reserve_crashkernel(void) crashk_res.start = crash_base; crashk_res.end = crash_base + crash_size - 1; insert_resource(&iomem_resource, &crashk_res); - reserve_kdump_bootmem(crash_base, crash_size, CHUNK_READ_WRITE); + reserve_kdump_bootmem(crash_base, crash_size, CHUNK_CRASHK); pr_info("Reserving %lluMB of memory at %lluMB " "for crashkernel (System RAM: %luMB)\n", crash_size >> 20, crash_base >> 20, memory_end >> 20); @@ -816,7 +817,8 @@ setup_memory(void) for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { unsigned long start_chunk, end_chunk, pfn; - if (memory_chunk[i].type != CHUNK_READ_WRITE) + if (memory_chunk[i].type != CHUNK_READ_WRITE && + memory_chunk[i].type != CHUNK_CRASHK) continue; start_chunk = PFN_DOWN(memory_chunk[i].addr); end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size); |