kernel/linux.git/arch/arc/mm, branch linux-4.16.y

Merge tag 'arc-4.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

2018-03-01T22:32:23+00:00

Pull ARC fixes from Vineet Gupta: - MCIP aka ARconnect fixes for SMP builds [Euginey] - preventive fix for SLC (L2 cache) flushing [Euginey] - Kconfig default fix [Ulf Magnusson] - trailing semicolon fixes [Luis de Bethencourt] - other assorted minor fixes * tag 'arc-4.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: setup cpu possible mask according to possible-cpus dts property ARC: mcip: update MCIP debug mask when the new cpu came online ARC: mcip: halt GFRC counter when ARC cores halt ARCv2: boot log: fix HS48 release number arc: dts: use 'atmel' as manufacturer for at24 in axs10x_mb ARC: Fix malformed ARC_EMUL_UNALIGNED default ARC: boot log: Fix trailing semicolon ARC: dw2 unwind: Fix trailing semicolon ARC: Enable fatal signals on boot for dev platforms ARCv2: Don't pretend we may set L-bit in STATUS32 with kflag instruction ARCv2: cache: fix slc_entire_op: flush only instead of flush-n-inv

ARCv2: cache: fix slc_entire_op: flush only instead of flush-n-inv

2018-01-17T20:26:52+00:00

slc_entire_op with OP_FLUSH command also invalidates it. This is a preventive fix as the current use of slc_entire_op is only with OP_FLUSH_N_INV where the invalidate is required. Signed-off-by: Eugeniy Paltsev [vgupta: fixed changelog] Signed-off-by: Vineet Gupta

arc: remove CONFIG_ARC_PLAT_NEEDS_PHYS_TO_DMA

2018-01-09T15:28:37+00:00

We always use the stub definitions, so remove the unused other code. Signed-off-by: Christoph Hellwig Acked-by: Vineet Gupta

ARCv2: Accomodate HS48 MMUv5 by relaxing MMU ver checking

2017-11-06T19:31:21+00:00

HS48 cpus will have a new MMUv5, although Linux is currently not explicitly supporting the newer features (so remains at V4). The existing software/hardware version check is very tight and causes boot abort. Given that the MMUv5 hardware is backwards compatible, relax the boot check to allow current kernel support level to work with new hardware. Also while at it, move the ancient MMU related code to under ARCompact builds as baseline MMU for HS cpus is v4. Signed-off-by: Vineet Gupta

ARC: Re-enable MMU upon Machine Check exception

2017-09-01T18:29:05+00:00

I recently came upon a scenario where I would get a double fault machine check exception tiriggered by a kernel module. However the ensuing crash stacktrace (ksym lookup) was not working correctly. Turns out that machine check auto-disables MMU while modules are allocated in kernel vaddr spapce. This patch re-enables the MMU before start printing the stacktrace making stacktracing of modules work upon a fatal exception. Cc: stable@kernel.org Signed-off-by: Jose Abreu Reviewed-by: Alexey Brodkin Signed-off-by: Vineet Gupta [vgupta: moved code into low level handler to avoid in 2 places]

ARC: mm: Decouple RAM base address from kernel link address

2017-09-01T18:26:27+00:00

[Needed for HSDK] Currently the first page of system (hence RAM base) is assumed to be @ CONFIG_LINUX_LINK_BASE, where kernel itself is linked. However is case of HSDK platform, for reasons explained in that patch, this is not true. kernel needs to be linked @ 0x9000_0000 while DDR is still wired at 0x8000_0000. To properly account for this 256M of RAM, we need to introduce a new option and base page frame accountiing off of it. Signed-off-by: Eugeniy Paltsev Signed-off-by: Vineet Gupta [vgupta: renamed CONFIG_KERNEL_RAM_BASE_ADDRESS => CONFIG_LINUX_RAM_BASE : simplified changelog]

ARCv2: IOC: Tighten up the contraints (specifically base / size alignment)

2017-09-01T18:26:26+00:00

[Needed for HSDK] - Currently IOC base is hardcoded to 0x8000_0000 which is default value of LINUX_LINK_BASE, but may not always be the case - IOC programming model imposes the constraint that IOC aperture size needs to be aligned to IOC base address, which we were not checking so far. Signed-off-by: Eugeniy Paltsev Signed-off-by: Vineet Gupta [vgupta: reworked the changelog]

ARCv2: SLC: provide a line based flush routine for debugging

2017-08-30T16:21:34+00:00

Signed-off-by: Vineet Gupta

ARC: set boot print log level to PR_INFO

2017-08-28T22:17:36+00:00

Some of the boot printing code had printk() w/o explicit log level. This patch introduces consistency allowing platforms to switch to less verbose console logging using cmdline. NPS400 with 4K CPUs needs to avoid the cpu info printing for faster bootup. Signed-off-by: Noam Camus Signed-off-by: Vineet Gupta

ARC: [plat-eznps] Fix TLB Errata

2017-08-28T22:17:36+00:00

Due to a HW bug in NPS400 we get from time to time false TLB miss. Workaround this by validating each miss. Signed-off-by: Noam Camus Signed-off-by: Vineet Gupta