On 10/23/2013 05:31 PM, Tiejun Chen wrote:
Scott,
Tested on fsl-p5040 DS.
Scott,
Any comments to this version?
Tiejun
v6:
* rebase
* change the C code to initialize the exception stack addresses in the PACA
instead.
* Clear the PACA_IRQ_HARD_DIS force to exit directly from this debug exception
without replaying interrupt.
* so drop "book3e/kgdb: update thread's dbcr0".
v5:
* rebase on merge branch.
Note the original patch, [ATCH 5/7] kgdb/kgdbts: support ppc64, is already
merged
by Jason.
v4:
* use DEFINE_PER_CPU to allocate kgdb's thread_info
* add patch 7 to make usre copy thread_info only !__check_irq_replay
* leave "andi. r14,r11,MSR_PR" out of "#ifndef CONFIG_KGDB"
since cr0 is still used lately.
* retest
v3:
* make work when enable CONFIG_RELOCATABLE
* fix one typo in patch,
"powerpc/book3e: store critical/machine/debug exception thread info":
ld r1,PACAKSAVE(r13);
-> ld r14,PACAKSAVE(r13);
* remove copying the thread_info since booke and book3e always copy
the thead_info now when we enter the debug exception, and so drop
the v2 patch, "book3e/kgdb: Fix a single stgep case of lazy IRQ"
v2:
* Make sure we cover CONFIG_PPC_BOOK3E_64 safely
* Use LOAD_REG_IMMEDIATE() to load properly
the value of the constant expression in load debug exception stack
* Copy thread infor form the kernel stack coming from usr
* Rebase latest powerpc git tree
v1:
* Copy thread info only when we are from !user mode since we'll get kernel stack
coming from usr directly.
* remove save/restore EX_R14/EX_R15 since DBG_EXCEPTION_PROLOG already covered
this.
* use CURRENT_THREAD_INFO() conveniently to get thread.
* fix some typos
* add a patch to make sure gdb can generate a single step properly to invoke a
kgdb state.
* add a patch to if we need to replay an interrupt, we shouldn't restore that
previous backup thread info to make sure we can replay an interrupt lately
with a proper thread info.
* rebase latest powerpc git tree
v0:
This patchset is used to support kgdb for book3e.
----------------------------------------------------------------
Tiejun Chen (5):
powerpc/book3e: initialize crit/mc/dbg kernel stack pointers
powerpc/book3e: store crit/mc/dbg exception thread info
powerpc/book3e: support kgdb for kernel space
powerpc/kgdb: use DEFINE_PER_CPU to allocate kgdb's thread_info
powerpc/book3e/kgdb: Fix a single stgep case of lazy IRQ
arch/powerpc/kernel/exceptions-64e.S | 26 ++++++++++++++++++++++----
arch/powerpc/kernel/kgdb.c | 13 ++++++++++---
arch/powerpc/kernel/setup_64.c | 18 ++++++++++++------
3 files changed, 44 insertions(+), 13 deletions(-)
Tiejun
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