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| author |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2007-10-30 09:46:06 +1100 |
|---|---|---|
| committer |   Josh Boyer <jwboyer@linux.vnet.ibm.com> | 2007-11-01 07:15:09 -0500 |
| commit | e701d269aa28996f3502780951fe1b12d5d66b49 (patch) | |
| tree | a55db7df5755bf9c69f466432786de7e7e445ba8 /arch/ppc/platforms/4xx/ebony.c | |
| parent | [POWERPC] allocation fix in ppc/platforms/4xx/luan.c (diff) | |
| download | linux-dev-e701d269aa28996f3502780951fe1b12d5d66b49.tar.xz linux-dev-e701d269aa28996f3502780951fe1b12d5d66b49.zip | |
[POWERPC] 4xx: Fix 4xx flush_tlb_page()
On 4xx CPUs, the current implementation of flush_tlb_page() uses
a low level _tlbie() assembly function that only works for the
current PID. Thus, invalidations caused by, for example, a COW
fault triggered by get_user_pages() from a different context will
not work properly, causing among other things, gdb breakpoints
to fail.
This patch adds a "pid" argument to _tlbie() on 4xx processors,
and uses it to flush entries in the right context. FSL BookE
also gets the argument but it seems they don't need it (their
tlbivax form ignores the PID when invalidating according to the
document I have).
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Diffstat (limited to 'arch/ppc/platforms/4xx/ebony.c')
| -rw-r--r-- | arch/ppc/platforms/4xx/ebony.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/ppc/platforms/4xx/ebony.c b/arch/ppc/platforms/4xx/ebony.c index 05d7184d7e14..453643a0eeea 100644 --- a/arch/ppc/platforms/4xx/ebony.c +++ b/arch/ppc/platforms/4xx/ebony.c @@ -236,7 +236,7 @@ ebony_early_serial_map(void) gen550_init(0, &port); /* Purge TLB entry added in head_44x.S for early serial access */ - _tlbie(UART0_IO_BASE); + _tlbie(UART0_IO_BASE, 0); #endif port.membase = ioremap64(PPC440GP_UART1_ADDR, 8); |