kernel.git/arch/xtensa/kernel, branch linux-3.15.y

xtensa: add fixup for double exception raised in window overflow

2014-08-07T23:53:53Z

commit 17290231df16eeee5dfc198dbf5ee4b419996dcd upstream. There are two FIXMEs in the double exception handler 'for the extremely unlikely case'. This case gets hit by gcc during kernel build once in a few hours, resulting in an unrecoverable exception condition. Provide missing fixup routine to handle this case. Double exception literals now need 8 more bytes, add them to the linker script. Also replace bbsi instructions with bbsi.l as we're branching depending on 8th and 7th LSB-based bits of exception address. This may be tested by adding the explicit DTLB invalidation to window overflow handlers, like the following: # --- a/arch/xtensa/kernel/vectors.S # +++ b/arch/xtensa/kernel/vectors.S # @@ -592,6 +592,14 @@ ENDPROC(_WindowUnderflow4) # ENTRY_ALIGN64(_WindowOverflow8) # # s32e a0, a9, -16 # + bbsi.l a9, 31, 1f # + rsr a0, ccount # + bbsi.l a0, 4, 1f # + pdtlb a0, a9 # + idtlb a0 # + movi a0, 9 # + idtlb a0 # +1: # l32e a0, a1, -12 # s32e a2, a9, -8 # s32e a1, a9, -12 Signed-off-by: Max Filippov Signed-off-by: Greg Kroah-Hartman

Merge tag 'xtensa-next-20140503' of git://github.com/czankel/xtensa-linux

2014-05-05T22:36:59Z

Pull Xtensa fixes from Chris Zankel: - Fixes allmodconfig, allnoconfig builds - Adds highmem support - Enables build-time exception table sorting. * tag 'xtensa-next-20140503' of git://github.com/czankel/xtensa-linux: xtensa: ISS: don't depend on CONFIG_TTY xtensa: xt2000: drop redundant sysmem initialization xtensa: add support for KC705 xtensa: xtfpga: introduce SoC I/O bus xtensa: add HIGHMEM support xtensa: optimize local_flush_tlb_kernel_range xtensa: dump sysmem from the bootmem_init xtensa: handle memmap kernel option xtensa: keep sysmem banks ordered in mem_reserve xtensa: keep sysmem banks ordered in add_sysmem_bank xtensa: split bootparam and kernel meminfo xtensa: enable sorting extable at build time xtensa: export __{invalidate,flush}_dcache_range xtensa: Export __invalidate_icache_range

xtensa: optimize local_flush_tlb_kernel_range

2014-04-06T17:29:17Z

Don't flush whole TLB if only a small kernel range is requested. Signed-off-by: Max Filippov

xtensa: handle memmap kernel option

2014-04-01T21:35:54Z

This option is useful for reserving memory regions for secondary cores in AMP configurations. Implement the following memmap variants: - memmap=nn[KMG]@ss[KMG]: force usage of a specific region of memory; - memmap=nn[KMG]$ss[KMG]: mark specified memory as reserved; - memmap=nn[KMG]: set end of memory. Signed-off-by: Max Filippov

xtensa: keep sysmem banks ordered in mem_reserve

2014-04-01T21:35:53Z

Rewrite mem_reserve so that it keeps bank order. Also make its return code more traditional. Signed-off-by: Max Filippov

xtensa: split bootparam and kernel meminfo

2014-04-01T21:35:51Z

Bootparam meminfo is a bootloader ABI, kernel meminfo is for the kernel bookkeeping, keep them separate. Kernel doesn't care of memory region types, so drop the type field and don't pass it to add_sysmem_bank. Move kernel sysmem structures and prototypes to asm/sysmem.h and sysmem variable and add_sysmem_bank to mm/init.c Signed-off-by: Max Filippov

xtensa: export __{invalidate,flush}_dcache_range

2014-04-01T21:35:50Z

Signed-off-by: Max Filippov

xtensa: Export __invalidate_icache_range

2014-04-01T21:35:49Z

When modular code calls flush_icache_range(): ERROR: "__invalidate_icache_range" [drivers/misc/lkdtm.ko] undefined! make[1]: *** [__modpost] Error 1 Signed-off-by: Geert Uytterhoeven Reviewed-by: Kees Cook Signed-off-by: Max Filippov

Merge branch 'irq/for-gpio' into irq/core

2014-03-12T15:01:07Z

Merge the request/release callbacks which are in a separate branch for consumption by the gpio folks. Signed-off-by: Thomas Gleixner

xtensa: Use irq_set_affinity instead of homebrewn code

2014-03-04T16:37:55Z

There is no point in having an incomplete copy of irq_set_affinity() for the hotplug irq migration code. Use the core function instead and while at it switch to for_each_active_irq() Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: Chris Zankel Cc: xtensa Link: http://lkml.kernel.org/r/20140223212736.664624945@linutronix.de Signed-off-by: Thomas Gleixner