Piotr Kubaj eaaf838e33 powerpc64: give each CPU its own KDB trap stack ...

Kernel mode program, trace, breakpoint and machine check exceptions go
through dbtrap, which saves the registers on trapstk and, if KDB doesn't
want the trap, restores them from there and continues with the normal
trap handler. There was just one trapstk for all CPUs, so when two of
them trapped at the same time they overwrote each other's frame and one
of them carried on with the other's registers. DTrace fbt probes are
these traps, so a probe on a function that runs on several CPUs at once
took the kernel down within seconds.

Keep the stack in the pcpu instead. The boot CPU gets a static one,
since it's set up before malloc works, the others allocate theirs in
cpu_pcpu_init() like the Book-E critical interrupt stack.

Approved by:	jhibbits
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D60362

2026-10-15 16:27:59 +02:00

..

aim_machdep.c

powerpc64: give each CPU its own KDB trap stack

2026-10-15 16:27:59 +02:00

locore32.S

…

locore64.S

powerpc64: give each CPU its own KDB trap stack

2026-10-15 16:27:59 +02:00

locore.S

…

mmu_oea64.c

vm_page: Replace PGA_EXECUTABLE with PGA_PMAP_PRIV1

2026-09-26 10:40:45 -05:00

mmu_oea64.h

powerpc aim64: Return vm_paddr_t from moea64_bootstrap_alloc

2026-04-23 13:05:54 -04:00

mmu_oea.c

pmap_map: Use void * for the return value instead of vm_offset_t

2026-04-23 13:05:54 -04:00

mmu_radix.c

powerpc/radix: include page tables in minidumps

2026-09-28 11:53:00 -04:00

moea64_native.c

PHYS_TO_DMAP: Return a void * instead of a vm_offset_t

2026-04-23 13:05:54 -04:00

mp_cpudep.c

sched: New scheduler interface definition scheme

2026-10-06 15:27:41 +02:00

slb.c

VM_PAGE_TO_DMAP: Wrapper macro to return direct map address for a page

2026-04-23 13:05:55 -04:00

trap_subr32.S

…

trap_subr64.S

powerpc64: give each CPU its own KDB trap stack

2026-10-15 16:27:59 +02:00