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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-10-30 09:46:06 +1100
committerJosh Boyer <jwboyer@linux.vnet.ibm.com>2007-11-01 07:15:09 -0500
commite701d269aa28996f3502780951fe1b12d5d66b49 (patch)
treea55db7df5755bf9c69f466432786de7e7e445ba8 /arch/ppc/platforms
parent57d75561be5496289601b2c94787ec38c718fcae (diff)
[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')
-rw-r--r--arch/ppc/platforms/4xx/ebony.c2
-rw-r--r--arch/ppc/platforms/4xx/ocotea.c2
-rw-r--r--arch/ppc/platforms/4xx/taishan.c2
3 files changed, 3 insertions, 3 deletions
diff --git a/arch/ppc/platforms/4xx/ebony.c b/arch/ppc/platforms/4xx/ebony.c
index 05d7184d7e1..453643a0eee 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);
diff --git a/arch/ppc/platforms/4xx/ocotea.c b/arch/ppc/platforms/4xx/ocotea.c
index fd0f971881d..28a712cd480 100644
--- a/arch/ppc/platforms/4xx/ocotea.c
+++ b/arch/ppc/platforms/4xx/ocotea.c
@@ -259,7 +259,7 @@ ocotea_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(PPC440GX_UART1_ADDR, 8);
diff --git a/arch/ppc/platforms/4xx/taishan.c b/arch/ppc/platforms/4xx/taishan.c
index 888c492b4a4..f6a0c6650f3 100644
--- a/arch/ppc/platforms/4xx/taishan.c
+++ b/arch/ppc/platforms/4xx/taishan.c
@@ -316,7 +316,7 @@ taishan_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(PPC440GX_UART1_ADDR, 8);