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SubjectRe: [v3] powerpc: implement CONFIG_DEBUG_VIRTUAL
Date
On Tue, 2018-12-11 at 22:40:53 UTC, Christophe Leroy wrote:
> This patch implements CONFIG_DEBUG_VIRTUAL to warn about
> incorrect use of virt_to_phys() and page_to_phys()
>
> Below is the result of test_debug_virtual:
>
> [ 1.438746] WARNING: CPU: 0 PID: 1 at ./arch/powerpc/include/asm/io.h:808 test_debug_virtual_init+0x3c/0xd4
> [ 1.448156] CPU: 0 PID: 1 Comm: swapper Not tainted 4.20.0-rc5-00560-g6bfb52e23a00-dirty #532
> [ 1.457259] NIP: c066c550 LR: c0650ccc CTR: c066c514
> [ 1.462257] REGS: c900bdb0 TRAP: 0700 Not tainted (4.20.0-rc5-00560-g6bfb52e23a00-dirty)
> [ 1.471184] MSR: 00029032 <EE,ME,IR,DR,RI> CR: 48000422 XER: 20000000
> [ 1.477811]
> [ 1.477811] GPR00: c0650ccc c900be60 c60d0000 00000000 006000c0 c9000000 00009032 c7fa0020
> [ 1.477811] GPR08: 00002400 00000001 09000000 00000000 c07b5d04 00000000 c00037d8 00000000
> [ 1.477811] GPR16: 00000000 00000000 00000000 00000000 c0760000 c0740000 00000092 c0685bb0
> [ 1.477811] GPR24: c065042c c068a734 c0685b8c 00000006 00000000 c0760000 c075c3c0 ffffffff
> [ 1.512711] NIP [c066c550] test_debug_virtual_init+0x3c/0xd4
> [ 1.518315] LR [c0650ccc] do_one_initcall+0x8c/0x1cc
> [ 1.523163] Call Trace:
> [ 1.525595] [c900be60] [c0567340] 0xc0567340 (unreliable)
> [ 1.530954] [c900be90] [c0650ccc] do_one_initcall+0x8c/0x1cc
> [ 1.536551] [c900bef0] [c0651000] kernel_init_freeable+0x1f4/0x2cc
> [ 1.542658] [c900bf30] [c00037ec] kernel_init+0x14/0x110
> [ 1.547913] [c900bf40] [c000e1d0] ret_from_kernel_thread+0x14/0x1c
> [ 1.553971] Instruction dump:
> [ 1.556909] 3ca50100 bfa10024 54a5000e 3fa0c076 7c0802a6 3d454000 813dc204 554893be
> [ 1.564566] 7d294010 7d294910 90010034 39290001 <0f090000> 7c3e0b78 955e0008 3fe0c062
> [ 1.572425] ---[ end trace 6f6984225b280ad6 ]---
> [ 1.577467] PA: 0x09000000 for VA: 0xc9000000
> [ 1.581799] PA: 0x061e8f50 for VA: 0xc61e8f50
>
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/6bf752daca07c85c181159f75dcf65

cheers

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