linux/arch/mips/lib, branch v4.9

MIPS: dump_tlb: Fix printk continuations

2016-11-04T00:04:32Z

Since commit 4bcc595ccd80 ("printk: reinstate KERN_CONT for printing continuation lines") the output from TLB dumps on MIPS has been pretty unreadable due to the lack of KERN_CONT markers. Use pr_cont to provide the appropriate markers & restore the expected output. Continuation is also used for the second line of each TLB entry printed in dump_tlb.c even though it has a newline, since it is a continuation of the interpretation of the same TLB entry. For example: [ 46.371884] Index: 0 pgmask=16kb va=77654000 asid=73 gid=00 [ri=0 xi=0 pa=ffc18000 c=5 d=0 v=1 g=0] [ri=0 xi=0 pa=ffc1c000 c=5 d=0 v=1 g=0] [ 46.385380] Index: 12 pgmask=16kb va=004b4000 asid=73 gid=00 [ri=0 xi=0 pa=00000000 c=0 d=0 v=0 g=0] [ri=0 xi=0 pa=ffb00000 c=5 d=1 v=1 g=0] Signed-off-by: James Hogan Cc: Maciej W. Rozycki Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14444/ Signed-off-by: Ralf Baechle

MIPS: PCI: Introduce CONFIG_PCI_DRIVERS_LEGACY

2016-10-06T16:00:05Z

Introduce 2 Kconfig symbols, CONFIG_PCI_DRIVERS_GENERIC & CONFIG_PCI_DRIVERS_LEGACY, which indicate whether the system should be built to for PCI drivers using the MIPS-specific struct pci_controller API (hereafter "legacy" drivers) or more generic drivers using only functionality provided by the PCI core (hereafter "generic" drivers). The Kconfig entries are created such that platforms have to select CONFIG_PCI_DRIVERS_GENERIC if they wish to use it - that is, the default is CONFIG_PCI_DRIVERS_LEGACY so that existing platforms need no modification. The functions declared in pci.h are rearranged with those provided only by pci-legacy.c being guarded by an #ifdef CONFIG_PCI_DRIVERS_LEGACY to ensure they are only used in configurations where they are implemented. Signed-off-by: Paul Burton Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14345/ Signed-off-by: Ralf Baechle

MIPS: lib: Audit and remove any unnecessary uses of module.h

2016-10-04T23:31:20Z

Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance for the presence of either and replace as needed. The compiler.h additions are for an implict presence of the "notrace" which module.h brought in but export.h does not. Signed-off-by: Paul Gortmaker Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14034/ Signed-off-by: Ralf Baechle

MIPS: lib: Mark intrinsics notrace

2016-05-28T10:35:11Z

On certain MIPS32 devices, the ftrace tracer "function_graph" uses __lshrdi3() during the capturing of trace data. ftrace then attempts to trace __lshrdi3() which leads to infinite recursion and a stack overflow. Fix this by marking __lshrdi3() as notrace. Mark the other compiler intrinsics as notrace in case the compiler decides to use them in the ftrace path. Signed-off-by: Harvey Hunt Cc: Cc: Cc: # 4.2.x- Patchwork: https://patchwork.linux-mips.org/patch/13354/ Signed-off-by: Ralf Baechle

MIPS: lib: Fix typo

2016-05-28T10:35:08Z

Signed-off-by: Andrea Gelmini Cc: trivial@kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/13331/ Signed-off-by: Ralf Baechle

MIPS: Print GuestCtl1 on machine check exception

2016-05-13T13:30:25Z

The GuestCtl1 CP0 register can contain the GuestID used for root TLB operations, which affects TLB matching. The other TLB registers are already dumped out to the log on a machine check exception due to multiple matching TLB entries, so also dump the value of the GuestCtl1 register if GuestIDs are supported. Signed-off-by: James Hogan Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/13232/ Signed-off-by: Ralf Baechle

MIPS: dump_tlb: Preserve and dump GuestID

2016-05-13T13:30:25Z

The GuestID for root TLB operations (GuestCtl1.RID) is modified by TLB reads, so needs preserving by dump_tlb() like the ASID field of EntryHi. Also dump the GuestID of each entry if it exists alongside the ASID, as it forms an important part of the TLB entry when VZ guests are used. Signed-off-by: James Hogan Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/13230/ Signed-off-by: Ralf Baechle

MIPS: Retrieve ASID masks using function accepting struct cpuinfo_mips

2016-05-13T12:02:20Z

In preparation for supporting variable ASID masks, retrieve ASID masks using functions in asm/cpu-info.h which accept struct cpuinfo_mips. This will allow those functions to determine the ASID mask based upon the CPU in a later patch. This also allows for the r3k & r8k cases to be handled in Kconfig, which is arguably cleaner than the previous #ifdefs. Signed-off-by: Paul Burton Signed-off-by: James Hogan Cc: Paolo Bonzini Cc: Radim Krčmář Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/13210/ Signed-off-by: Ralf Baechle

MIPS: memset.S: Disable code unused with non-R6 MIPS configs

2016-05-09T10:00:04Z

This complements commit 8c56208aff77 ("MIPS: lib: memset: Add MIPS R6 support"). Signed-off-by: Maciej W. Rozycki Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/12452/ Signed-off-by: Ralf Baechle

MIPS: Cleanup the unused __arch_local_irq_restore() function

2016-01-22T00:58:49Z

In history, __arch_local_irq_restore() is only used by SMTC. However, SMTC support has been removed since 3.16, this patch remove the unused function. Signed-off-by: Huacai Chen Cc: Aurelien Jarno Cc: Steven J. Hill Cc: Fuxin Zhang Cc: Zhangjin Wu Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/12159/ Signed-off-by: Ralf Baechle