Anton Wöllert bf85fa6c87 [PATCH] ppc32: 8xx avoid icbi misbehaviour in __flush_dcache_icache_phys ... On 8xx, in the case where a pagefault happens for a process who's not the owner of the vma in question (ptrace for instance), the flush operation is performed via the physical address. Unfortunately, that results in a strange, unexplainable "icbi" instruction fault, most likely due to a CPU bug (see oops below). Avoid that by flushing the page via its kernel virtual address. Oops: kernel access of bad area, sig: 11 [#2] NIP: C000543C LR: C000B060 SP: C0F35DF0 REGS: c0f35d40 TRAP: 0300 Not tainted MSR: 00009022 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 10 DAR: 00000010, DSISR: C2000000 TASK = c0ea8430[761] 'gdbserver' THREAD: c0f34000 Last syscall: 26 GPR00: 00009022 C0F35DF0 C0EA8430 00F59000 00000100 FFFFFFFF 00F58000 00000001 GPR08: C021DAEF C0270000 00009032 C0270000 22044024 10025428 01000800 00000001 GPR16: 007FFF3F 00000001 00000000 7FBC6AC0 00F61022 00000001 C0839300 C01E0000 GPR24: 00CD0889 C082F568 3000AC18 C02A7A00 C0EA15C8 00F588A9 C02ACB00 C02ACB00 NIP [c000543c] __flush_dcache_icache_phys+0x38/0x54 LR [c000b060] flush_dcache_icache_page+0x20/0x30 Call trace: [c000b154] update_mmu_cache+0x7c/0xa4 [c005ae98] do_wp_page+0x460/0x5ec [c005c8a0] handle_mm_fault+0x7cc/0x91c [c005ccec] get_user_pages+0x2fc/0x65c [c0027104] access_process_vm+0x9c/0x1d4 [c00076e0] sys_ptrace+0x240/0x4a4 [c0002bd0] ret_from_syscall+0x0/0x44 Signed-off-by: Marcelo Tosatti <marcelo.tosatti@cyclades.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2005-07-27 16:34:34 -07:00
..
alpha
arm
arm26
cris	[PATCH] CRIS update: new subarchitecture v32	2005-07-27 16:26:01 -07:00
frv
h8300
i386	[PATCH] sys_get_thread_area does not clear the returned argument	2005-07-27 16:26:08 -07:00
ia64
m32r	[PATCH] m32r: add missing Kconfig help text	2005-07-27 16:25:59 -07:00
m68k
m68knommu
mips	[PATCH] mips: remove obsolete GIU driver for vr41xx	2005-07-27 16:25:58 -07:00
parisc
ppc	[PATCH] ppc32: 8xx avoid icbi misbehaviour in __flush_dcache_icache_phys	2005-07-27 16:34:34 -07:00
ppc64	[PATCH] turn many #if $undefined_string into #ifdef $undefined_string	2005-07-27 16:26:08 -07:00
s390	[PATCH] s390: cpu timer reset in machine check handler	2005-07-27 16:26:05 -07:00
sh
sh64
sparc
sparc64
um	[PATCH] turn many #if $undefined_string into #ifdef $undefined_string	2005-07-27 16:26:08 -07:00
v850	[PATCH] v850: Update PCI support	2005-07-27 16:26:03 -07:00
x86_64	[PATCH] turn many #if $undefined_string into #ifdef $undefined_string	2005-07-27 16:26:08 -07:00
xtensa