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| author | Paul Mackerras <paulus@samba.org> | 2008-01-15 17:29:33 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-01-15 17:30:58 +1100 |
| commit | dfbe0d3b6be52596b5694b1bb75b19562e769021 (patch) | |
| tree | 75e3ef05b6dd8cc7065fe77a05a9cd1b3495619a /arch/powerpc/platforms | |
| parent | d262c32a4bcc3e5fda0325a64e53c25fe1e999d7 (diff) | |
| download | linux-dfbe0d3b6be52596b5694b1bb75b19562e769021.tar.gz linux-dfbe0d3b6be52596b5694b1bb75b19562e769021.tar.bz2 linux-dfbe0d3b6be52596b5694b1bb75b19562e769021.zip | |
[POWERPC] Fix boot failure on POWER6
Commit 473980a99316c0e788bca50996375a2815124ce1 added a call to clear
the SLB shadow buffer before registering it. Unfortunately this means
that we clear out the entries that slb_initialize has previously set in
there. On POWER6, the hypervisor uses the SLB shadow buffer when doing
partition switches, and that means that after the next partition switch,
each non-boot CPU has no SLB entries to map the kernel text and data,
which causes it to crash.
This fixes it by reverting most of 473980a9 and instead clearing the
3rd entry explicitly in slb_initialize. This fixes the problem that
473980a9 was trying to solve, but without breaking POWER6.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/pseries/lpar.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index 34317aa148a8..9a455d46379d 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -272,7 +272,6 @@ void vpa_init(int cpu) */ addr = __pa(&slb_shadow[cpu]); if (firmware_has_feature(FW_FEATURE_SPLPAR)) { - slb_shadow_clear_all(); ret = register_slb_shadow(hwcpu, addr); if (ret) printk(KERN_ERR |