diff options
| author | Baoquan He <bhe@redhat.com> | 2023-09-14 11:31:39 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-04 10:41:58 -0700 |
| commit | 9c08a2a139fe83f217625ee0352ce531b9a666ea (patch) | |
| tree | 0dc5154c7c94826008f444c54ec5e3677e07d772 /arch/x86/Kconfig | |
| parent | b631b95dded5e7f007a3a79cbaf82ef50c1e2cf7 (diff) | |
x86: kdump: use generic interface to simplify crashkernel reservation code
With the help of newly changed function parse_crashkernel() and generic
reserve_crashkernel_generic(), crashkernel reservation can be simplified
by steps:
1) Add a new header file <asm/crash_core.h>, and define CRASH_ALIGN,
CRASH_ADDR_LOW_MAX, CRASH_ADDR_HIGH_MAX and
DEFAULT_CRASH_KERNEL_LOW_SIZE in <asm/crash_core.h>;
2) Add arch_reserve_crashkernel() to call parse_crashkernel() and
reserve_crashkernel_generic(), and do the ARCH specific work if
needed.
3) Add ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION Kconfig in
arch/x86/Kconfig.
When adding DEFAULT_CRASH_KERNEL_LOW_SIZE, add crash_low_size_default() to
calculate crashkernel low memory because x86_64 has special requirement.
The old reserve_crashkernel_low() and reserve_crashkernel() can be
removed.
[bhe@redhat.com: move crash_low_size_default() code into <asm/crash_core.h>]
Link: https://lkml.kernel.org/r/ZQpeAjOmuMJBFw1/@MiWiFi-R3L-srv
Link: https://lkml.kernel.org/r/20230914033142.676708-7-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chen Jiahao <chenjiahao16@huawei.com>
Cc: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 66bfabae8814..36b2f12f31c3 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2062,6 +2062,9 @@ config ARCH_SUPPORTS_CRASH_DUMP config ARCH_SUPPORTS_CRASH_HOTPLUG def_bool y +config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION + def_bool CRASH_CORE + config PHYSICAL_START hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) default "0x1000000" |