diff options
| author | Paul Mackerras <paulus@samba.org> | 2011-12-05 19:35:32 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-12-08 14:22:53 +1100 |
| commit | cba313da5c8ddbe6bba74c9f2b8f6d9e0bc0e723 (patch) | |
| tree | d98c1ca63240f2f13dbaac9769d08da9803d2647 /arch/powerpc/kernel/exceptions-64s.S | |
| parent | 33392640424ff775e7d82eab4a51af7b8cc9384d (diff) | |
powerpc/powernv: Fix problems in onlining CPUs
At present, on the powernv platform, if you off-line a CPU that was
online, and then try to on-line it again, the kernel generates a
warning message "OPAL Error -1 starting CPU n". Furthermore, if the
CPU is a secondary thread that was used by KVM while it was off-line,
the CPU fails to come online.
The first problem is fixed by only calling OPAL to start the CPU the
first time it is on-lined, as indicated by the cpu_start field of its
PACA being zero. The second problem is fixed by restoring the
cpu_start field to 1 instead of 0 when using the CPU within KVM.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/exceptions-64s.S')
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64s.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index cf9c69b9189c..d4be7bb3dbdf 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -65,7 +65,7 @@ BEGIN_FTR_SECTION lbz r0,PACAPROCSTART(r13) cmpwi r0,0x80 bne 1f - li r0,0 + li r0,1 stb r0,PACAPROCSTART(r13) b kvm_start_guest 1: |