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| author | Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2014-02-09 22:25:45 +0530 |
|---|---|---|
| committer | Simon Horman <horms@verge.net.au> | 2014-05-15 13:48:42 +0900 |
| commit | 7bb7c2a4bae8510cfc898373e21007ac996432ec (patch) | |
| tree | dd1de8e6da19fc7287d8df46e335e4cef7d5987a | |
| parent | d8847573a40fc00442fd727c4906b5b619fa5e1f (diff) | |
| download | kexec-tools-7bb7c2a4bae8510cfc898373e21007ac996432ec.tar.gz | |
kexec/ppc64: Handle reserved memory ranges exported by OPAL firmware.
OPAL based system exports reserved memory ranges through /proc/device-tree
for the regions that are reserved by OPAL firmware. Traverse
/proc/device-tree/reserved-ranges and add them to exclude_ranges[] and
reserve them.
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
| -rw-r--r-- | kexec/arch/ppc64/kexec-ppc64.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/kexec/arch/ppc64/kexec-ppc64.c b/kexec/arch/ppc64/kexec-ppc64.c index 5956836..6e79f52 100644 --- a/kexec/arch/ppc64/kexec-ppc64.c +++ b/kexec/arch/ppc64/kexec-ppc64.c @@ -31,6 +31,7 @@ #include "../../kexec.h" #include "../../kexec-syscall.h" #include "kexec-ppc64.h" +#include "../../fs2dt.h" #include "crashdump-ppc64.h" #include <arch/options.h> @@ -314,6 +315,47 @@ static int sort_ranges(void) return 0; } +void scan_reserved_ranges(unsigned long kexec_flags, int *range_index) +{ + char fname[256], buf[16]; + FILE *file; + int i = *range_index; + + strcpy(fname, "/proc/device-tree/reserved-ranges"); + + file = fopen(fname, "r"); + if (file == NULL) { + if (errno != ENOENT) { + perror(fname); + return; + } + errno = 0; + /* File not present. Non PowerKVM system. */ + return; + } + + /* + * Each reserved range is an (address,size) pair, 2 cells each, + * totalling 4 cells per range. + */ + while (fread(buf, sizeof(uint64_t) * 2, 1, file) == 1) { + uint64_t base, size; + + base = be64_to_cpu(((uint64_t *)buf)[0]); + size = be64_to_cpu(((uint64_t *)buf)[1]); + + exclude_range[i].start = base; + exclude_range[i].end = base + size; + i++; + if (i >= max_memory_ranges) + realloc_memory_ranges(); + + reserve(base, size); + } + fclose(file); + *range_index = i; +} + /* Get devtree details and create exclude_range array * Also create usablemem_ranges for KEXEC_ON_CRASH */ @@ -339,6 +381,8 @@ static int get_devtree_details(unsigned long kexec_flags) return -1; } + scan_reserved_ranges(kexec_flags, &i); + while ((dentry = readdir(dir)) != NULL) { if (strncmp(dentry->d_name, "chosen", 6) && strncmp(dentry->d_name, "memory@", 7) && |