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| author | Catalin Marinas <catalin.marinas@arm.com> | 2005-06-24 21:27:39 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-06-24 21:27:39 +0100 |
| commit | 79042f087b5ac7bba819de03dc3e7462bab8aad9 (patch) | |
| tree | 0fb7ca4b0d690d59a4a0d5bc6774a345edb43284 /arch | |
| parent | 5932ae3f5d610fd8d047ef4693bab9f084e5c56d (diff) | |
| download | blackbird-op-linux-79042f087b5ac7bba819de03dc3e7462bab8aad9.tar.gz blackbird-op-linux-79042f087b5ac7bba819de03dc3e7462bab8aad9.zip | |
[PATCH] ARM: 2698/1: Enable kernel r/w access to user pages on ARMv6
Patch from Catalin Marinas
cpu_v6_set_pte() sets the kernel access rights to r/o for user
pages (L_PTE_USER) when neither L_PTE_WRITE nor L_PTE_DIRTY are
set. This causes a kernel data abort when writing the TLS value
in the 0xffff0000 page. This patch enables the kernel r/w access.
Signed-off-by: Catalin Marinas
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mm/proc-v6.S | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S index 0aa73d414783..e3d8510f4340 100644 --- a/arch/arm/mm/proc-v6.S +++ b/arch/arm/mm/proc-v6.S @@ -132,8 +132,8 @@ ENTRY(cpu_v6_switch_mm) * 100x 1 0 1 r/o no acc * 10x0 1 0 1 r/o no acc * 1011 0 0 1 r/w no acc - * 110x 1 1 0 r/o r/o - * 11x0 1 1 0 r/o r/o + * 110x 0 1 0 r/w r/o + * 11x0 0 1 0 r/w r/o * 1111 0 1 1 r/w r/w */ ENTRY(cpu_v6_set_pte) @@ -150,7 +150,7 @@ ENTRY(cpu_v6_set_pte) tst r1, #L_PTE_USER orrne r2, r2, #AP1 | nG tstne r2, #APX - eorne r2, r2, #AP0 + bicne r2, r2, #APX | AP0 tst r1, #L_PTE_YOUNG biceq r2, r2, #APX | AP1 | AP0 |
