powerpc: Prepare to build with generic entry/exit framework

2026-05-20T01:27:13+00:00

This patch introduces preparatory changes needed to support building PowerPC with the generic entry/exit (irqentry) framework. The following infrastructure updates are added: - Add a syscall_work field to struct thread_info to hold SYSCALL_WORK_* flags. - Provide a stub implementation of arch_syscall_is_vdso_sigreturn(), returning false for now. - Introduce on_thread_stack() helper to detect if the current stack pointer lies within the task’s kernel stack. These additions enable later integration with the generic entry/exit infrastructure while keeping existing PowerPC behavior unchanged. No functional change is intended in this patch. Signed-off-by: Mukesh Kumar Chaurasiya Tested-by: Samir M Tested-by: David Gow Tested-by: Venkat Rao Bagalkote Reviewed-by: Shrikanth Hegde Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20260427122742.210074-3-mkchauras@gmail.com

powerpc: Add show_user_instructions()

2018-08-07T14:32:30+00:00

show_user_instructions() is a slightly modified version of show_instructions() that allows userspace instruction dump. This will be useful within show_signal_msg() to dump userspace instructions of the faulty location. Here is a sample of what show_user_instructions() outputs: pandafault[10850]: code: 4bfffeec 4bfffee8 3c401002 38427f00 fbe1fff8 f821ffc1 7c3f0b78 3d22fffe pandafault[10850]: code: 392988d0 f93f0020 e93f0020 39400048 <99490000> 39200000 7d234b78 383f0040 The current->comm and current->pid printed can serve as a glue that links the instructions dump to its originator, allowing messages to be interleaved in the logs. Signed-off-by: Murilo Opsfelder Araujo Signed-off-by: Michael Ellerman

kernel/linux.git/arch/powerpc/include/asm/stacktrace.h, branch v7.2-rc1

powerpc: Prepare to build with generic entry/exit framework

powerpc: Add show_user_instructions()