| Message ID | 20230827101128.70931-5-bhe@redhat.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | kdump: use generic functions to simplify crashkernel reservation in architectures | expand |
| Context | Check | Description |
|---|---|---|
| conchuod/cover_letter | success | Series has a cover letter |
| conchuod/tree_selection | success | Guessed tree name to be for-next at HEAD 9f944d2e0ab3 |
| conchuod/fixes_present | success | Fixes tag not required for -next series |
| conchuod/maintainers_pattern | success | MAINTAINERS pattern errors before the patch: 4 and now 4 |
| conchuod/verify_signedoff | success | Signed-off-by tag matches author and committer |
| conchuod/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| conchuod/build_rv64_clang_allmodconfig | success | Errors and warnings before: 46 this patch: 46 |
| conchuod/module_param | success | Was 0 now: 0 |
| conchuod/build_rv64_gcc_allmodconfig | success | Errors and warnings before: 308 this patch: 308 |
| conchuod/build_rv32_defconfig | fail | Build failed |
| conchuod/dtb_warn_rv64 | success | Errors and warnings before: 12 this patch: 12 |
| conchuod/header_inline | success | No static functions without inline keyword in header files |
| conchuod/checkpatch | warning | CHECK: Alignment should match open parenthesis |
| conchuod/build_rv64_nommu_k210_defconfig | fail | Build failed |
| conchuod/verify_fixes | success | No Fixes tag |
| conchuod/build_rv64_nommu_virt_defconfig | fail | Build failed |
diff --git a/include/linux/crash_core.h b/include/linux/crash_core.h index 2e76289699ff..85260bf4a734 100644 --- a/include/linux/crash_core.h +++ b/include/linux/crash_core.h @@ -77,6 +77,12 @@ Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type, void *data, size_t data_len); void final_note(Elf_Word *buf); +#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION +#ifndef DEFAULT_CRASH_KERNEL_LOW_SIZE +#define DEFAULT_CRASH_KERNEL_LOW_SIZE (128UL << 20) +#endif +#endif + int __init parse_crashkernel(char *cmdline, unsigned long long system_ram, unsigned long long *crash_size, unsigned long long *crash_base, unsigned long long *low_size, bool *high); diff --git a/kernel/crash_core.c b/kernel/crash_core.c index f6a5c219e2e1..355b0ab5189c 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -276,6 +276,9 @@ static int __init __parse_crashkernel(char *cmdline, /* * That function is the entry point for command line parsing and should be * called from the arch-specific code. + * + * If crashkernel=,high|low is supported on architecture, non-NULL values + * should be passed to parameters 'low_size' and 'high'. */ int __init parse_crashkernel(char *cmdline, unsigned long long system_ram, @@ -291,7 +294,30 @@ int __init parse_crashkernel(char *cmdline, crash_base, NULL); if (!high) return ret; - +#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION + else if (ret == -ENOENT) { + ret = __parse_crashkernel(cmdline, 0, crash_size, + crash_base, suffix_tbl[SUFFIX_HIGH]); + if (ret || !*crash_size) + return -1; + + /* + * crashkernel=Y,low can be specified or not, but invalid value + * is not allowed. + */ + ret = __parse_crashkernel(cmdline, 0, low_size, + crash_base, suffix_tbl[SUFFIX_LOW]); + if (ret == -ENOENT) + *low_size = DEFAULT_CRASH_KERNEL_LOW_SIZE; + else if (ret) + return -1; + + *high = true; + } else if (ret || !*crash_size) { + /* The specified value is invalid */ + return -1; + } +#endif return 0; }
Now parse_crashkernel() is a real entry point for all kinds of crahskernel parsing on any architecture. And wrap the crahskernel=,high|low handling inside CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION ifdeffery scope. Signed-off-by: Baoquan He <bhe@redhat.com> --- include/linux/crash_core.h | 6 ++++++ kernel/crash_core.c | 28 +++++++++++++++++++++++++++- 2 files changed, 33 insertions(+), 1 deletion(-)