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
..
4xx_io	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
8xx_io	[PATCH] ppc32: add Freescale MPC885ADS board support	2005-07-05 19:18:59 -07:00
8260_io	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
amiga	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
boot	[PATCH] ppc32: make -j12 all fails in uImage target	2005-07-13 11:25:25 -07:00
configs	[PATCH] ppc32: Fix building of radstone_ppc7d	2005-07-27 16:25:56 -07:00
kernel	[PATCH] ppc32: 8xx: update DataTLBMiss exception comment	2005-07-27 16:25:55 -07:00
lib	[PATCH] smp_processor_id() cleanup	2005-06-21 18:46:13 -07:00
math-emu	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
mm	[PATCH] ppc32: 8xx avoid icbi misbehaviour in __flush_dcache_icache_phys	2005-07-27 16:34:34 -07:00
oprofile	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
platforms	[PATCH] make a few functions static in pmac_setup.c	2005-07-27 16:25:57 -07:00
syslib	[PATCH] ppc32: Fix typo in setup of 2nd PCI bus on 85xx	2005-07-27 16:25:56 -07:00
xmon	[PATCH] ppc32: Kill embedded system.map, use kallsyms	2005-06-21 18:46:26 -07:00
Kconfig	[PATCH] ppc32: Make the UARTs on MPC824x individual platform devices	2005-07-27 16:25:55 -07:00
Kconfig.debug	[PATCH] ppc32: Remove FSL OCP support	2005-06-25 16:24:27 -07:00
Makefile	[PATCH] ppc32: Add support for Freescale e200 (Book-E) core	2005-06-25 16:24:26 -07:00