Hello Baoquan,
On 08/07/24 16:00, Baoquan He wrote:
On 07/07/24 at 08:54pm, Sourabh Jain wrote:
Kernel commit 79365026f869 (crash: add a new kexec flag for hotplug
support) has introduced a new kexec flag to generalize hotplug support.
The newly introduced kexec flags for hotplug allow architectures to
exclude all the required kexec segments from SHA calculation so that
the kernel can update them on hotplug events. This was not possible
earlier with the KEXEC_UPDATE_ELFCOREHDR kexec flags since it was added
only for the elfcorehdr segment.
To enable architectures to control the list of kexec segments to exclude
when hotplug support is enabled, add a new architecture-specific
function named arch_do_exclude_segment. During the SHA calculation, this
function gets called to let the architecture decide whether a specific
kexec segment should be considered for SHA calculation or not.
Note: To avoid breaking backward compatibility, the new kexec flag
KEXEC_CRASH_HOTPLUG_SUPPORT is not used for x86 for now.
Cc: Aditya Gupta <adityag@xxxxxxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Coiby Xu <coxu@xxxxxxxxxx>
Cc: Hari Bathini <hbathini@xxxxxxxxxxxxx>
Cc: Mahesh Salgaonkar <mahesh@xxxxxxxxxxxxx>
Cc: Simon Horman <horms@xxxxxxxxxx>
Signed-off-by: Sourabh Jain <sourabhjain@xxxxxxxxxxxxx>
---
kexec/arch/arm/kexec-arm.c | 5 ++++
kexec/arch/arm64/kexec-arm64.c | 5 ++++
kexec/arch/cris/kexec-cris.c | 4 +++
kexec/arch/hppa/kexec-hppa.c | 5 ++++
kexec/arch/i386/kexec-x86.c | 8 ++++++
kexec/arch/ia64/kexec-ia64.c | 4 +++
kexec/arch/loongarch/kexec-loongarch.c | 5 ++++
kexec/arch/m68k/kexec-m68k.c | 5 ++++
kexec/arch/mips/kexec-mips.c | 4 +++
kexec/arch/ppc/kexec-ppc.c | 4 +++
kexec/arch/ppc64/kexec-ppc64.c | 5 ++++
kexec/arch/s390/kexec-s390.c | 5 ++++
kexec/arch/sh/kexec-sh.c | 5 ++++
kexec/arch/x86_64/kexec-x86_64.c | 8 ++++++
kexec/kexec-syscall.h | 1 +
kexec/kexec.c | 40 ++++++++++++++++++++++----
kexec/kexec.h | 2 ++
17 files changed, 109 insertions(+), 6 deletions(-)
LGTM,
Acked-by: Baoquan He <bhe@xxxxxxxxxx>
Thank you for the Ack.
- Sourabh Jain
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