diff options
| author |   Michael Holzheu <holzheu@linux.vnet.ibm.com> | 2013-11-13 10:38:27 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-11-15 14:08:40 +0100 |
| commit | e657d8fe2faf49ed5d35e2325bd0f1712b8058cd (patch) | |
| tree | 420f6c638e1a42f3a83135eff827dd4832544023 /arch/s390/kernel/crash_dump.c | |
| parent | s390/sclp: Move declarations for sclp_sdias into separate header file (diff) | |
| download | linux-dev-e657d8fe2faf49ed5d35e2325bd0f1712b8058cd.tar.xz linux-dev-e657d8fe2faf49ed5d35e2325bd0f1712b8058cd.zip | |
s390/sclp: Determine HSA size dynamically for zfcpdump
Currently we have hardcoded the HSA size to 32 MiB. With this patch the
HSA size is determined dynamically via SCLP in early.c.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
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/crash_dump.c')
| -rw-r--r-- | arch/s390/kernel/crash_dump.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c index f45b2ab0cb81..d7658c4b2ed5 100644 --- a/arch/s390/kernel/crash_dump.c +++ b/arch/s390/kernel/crash_dump.c @@ -95,7 +95,7 @@ static void *elfcorehdr_newmem; /* * Copy one page from zfcpdump "oldmem" * - * For pages below ZFCPDUMP_HSA_SIZE memory from the HSA is copied. Otherwise + * For pages below HSA size memory from the HSA is copied. Otherwise * real memory copy is used. */ static ssize_t copy_oldmem_page_zfcpdump(char *buf, size_t csize, @@ -103,7 +103,7 @@ static ssize_t copy_oldmem_page_zfcpdump(char *buf, size_t csize, { int rc; - if (src < ZFCPDUMP_HSA_SIZE) { + if (src < sclp_get_hsa_size()) { rc = memcpy_hsa(buf, src, csize, userbuf); } else { if (userbuf) @@ -188,18 +188,19 @@ static int remap_oldmem_pfn_range_kdump(struct vm_area_struct *vma, /* * Remap "oldmem" for zfcpdump * - * We only map available memory above ZFCPDUMP_HSA_SIZE. Memory below - * ZFCPDUMP_HSA_SIZE is read on demand using the copy_oldmem_page() function. + * We only map available memory above HSA size. Memory below HSA size + * is read on demand using the copy_oldmem_page() function. */ static int remap_oldmem_pfn_range_zfcpdump(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot) { + unsigned long hsa_end = sclp_get_hsa_size(); unsigned long size_hsa; - if (pfn < ZFCPDUMP_HSA_SIZE >> PAGE_SHIFT) { - size_hsa = min(size, ZFCPDUMP_HSA_SIZE - (pfn << PAGE_SHIFT)); + if (pfn < hsa_end >> PAGE_SHIFT) { + size_hsa = min(size, hsa_end - (pfn << PAGE_SHIFT)); if (size == size_hsa) return 0; size -= size_hsa; @@ -238,9 +239,9 @@ int copy_from_oldmem(void *dest, void *src, size_t count) return rc; } } else { - if ((unsigned long) src < ZFCPDUMP_HSA_SIZE) { - copied = min(count, - ZFCPDUMP_HSA_SIZE - (unsigned long) src); + unsigned long hsa_end = sclp_get_hsa_size(); + if ((unsigned long) src < hsa_end) { + copied = min(count, hsa_end - (unsigned long) src); rc = memcpy_hsa(dest, (unsigned long) src, copied, 0); if (rc) return rc; @@ -580,6 +581,9 @@ int elfcorehdr_alloc(unsigned long long *addr, unsigned long long *size) /* If elfcorehdr= has been passed via cmdline, we use that one */ if (elfcorehdr_addr != ELFCORE_ADDR_MAX) return 0; + /* If we cannot get HSA size for zfcpdump return error */ + if (ipl_info.type == IPL_TYPE_FCP_DUMP && !sclp_get_hsa_size()) + return -ENODEV; mem_chunk_cnt = get_mem_chunk_cnt(); alloc_size = 0x1000 + get_cpu_cnt() * 0x300 + |