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2012-12-05MIPS: Fix endless loop when processing signals for kernel tasksDmitry Adamushko1-1/+6
The problem occurs [1] when a kernel-mode task returns from a system call with a pending signal. A real-life scenario is a child of 'khelper' returning from a failed kernel_execve() in ____call_usermodehelper() [ kernel/kmod.c ]. kernel_execve() fails due to a pending SIGKILL, which is the result of "kill -9 -1" (at least, busybox's init does it upon reboot). The loop is as follows: * syscall_exit_work: - work_pending: // start_of_the_loop - work_notifysig: - do_notify_resume() - do_signal() - if (!user_mode(regs)) return; - resume_userspace // TIF_SIGPENDING is still set - work_pending // so we call work_pending => goto // start_of_the_loop More information can be found in another LKML thread: http://www.serverphorums.com/read.php?12,457826 [1] The problem was also reproduced on !CONFIG_VM86 x86, and the following fix was accepted. http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=29a2e2836ff9ea65a603c89df217f4198973a74f Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/3571/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-12-05MIPS: R3000/R3081: Fix CPU detection.Ralf Baechle1-1/+0
Broken since e05ea74fc56f347f872ef9946d27c53e8bf20864 (lmo) rsp. cea7e2dfdef53fe55f359d00da562a268be06fd2 (kernel.org) [MIPS: Sort out CPU type to name translation.] These CPUs are no longer very popular to say the least ... Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Reported-by: Murphy McCauley <murphy.mccauley@gmail.com>
2012-12-05MIPS: N32: Fix signalfd4 syscall entry pointRalf Baechle1-1/+1
This needs to use the compat entry point or it's going to fail on big endian systems. Noticed by Al Viro. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-12-04MIPS: N32: Fix preadv(2) and pwritev(2) entry points.Ralf Baechle1-2/+2
By using the native syscall entry point the kernel was also expecting 64-bit iovec structures. This is broken since ddd9e91b71072b8ebe89311c3a44b077defa1756 [preadv/ pwritev: MIPS: Add preadv(2) and pwritev(2) syscalls.] which originally added these two syscalls. I walked through piles of code, including libc and couldn't find anything that would have worked around the issue so this change the API to what it should always have been. Noticed and patch suggested by Al Viro. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-11-23MIPS: Merge overlapping bootmem rangesRalf Baechle1-6/+20
Without this, we may end up with something like this in /proc/iomem: 01100000-014fffff : System RAM 01100000-013bf48f : Kernel code 013bf490-0149e01f : Kernel data 01500000-0c0fffff : System RAM but the two System RAM ranges should be one single range. This particular case will result in kexec failure on Octeon systems if the kernel being loaded by kexec is bigger than the already running kernel. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-18MIPS: CMP: Fix physical core number calculation logicjerin jacob1-1/+1
The CPUNum Field in EBase register is 10bit wide, so after 1 bit right shift, the mask value should be 0x1ff. Signed-off-by: jerin jacob <jerinjacobk@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/4420/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-14Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds8-627/+144
Pull MIPS update from Ralf Baechle: "Cleanups and fixes for breakage that occured earlier during this merge phase. Also a few patches that didn't make the first pull request. Of those is the Alchemy work that merges code for many of the SOCs and evaluation boards thus among other code shrinkage, reduces the number of MIPS defconfigs by 5." * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (22 commits) MIPS: SNI: Switch RM400 serial to SCCNXP driver MIPS: Remove unused empty_bad_pmd_table[] declaration. MIPS: MT: Remove kspd. MIPS: Malta: Fix section mismatch. MIPS: asm-offset.c: Delete unused irq_cpustat_t struct offsets. MIPS: Alchemy: Merge PB1100/1500 support into DB1000 code. MIPS: Alchemy: merge PB1550 support into DB1550 code MIPS: Alchemy: Single kernel for DB1200/1300/1550 MIPS: Optimize TLB refill for RI/XI configurations. MIPS: proc: Cleanup printing of ASEs. MIPS: Hardwire detection of DSP ASE Rev 2 for systems, as required. MIPS: Add detection of DSP ASE Revision 2. MIPS: Optimize pgd_init and pmd_init MIPS: perf: Add perf functionality for BMIPS5000 MIPS: perf: Split the Kconfig option CONFIG_MIPS_MT_SMP MIPS: perf: Remove unnecessary #ifdef MIPS: perf: Add cpu feature bit for PCI (performance counter interrupt) MIPS: perf: Change the "mips_perf_event" table unsupported indicator. MIPS: Align swapper_pg_dir to 64K for better TLB Refill code. vmlinux.lds.h: Allow architectures to add sections to the front of .bss ...
2012-10-14Merge branch 'modules-next' of ↵Linus Torvalds3-120/+147
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull module signing support from Rusty Russell: "module signing is the highlight, but it's an all-over David Howells frenzy..." Hmm "Magrathea: Glacier signing key". Somebody has been reading too much HHGTTG. * 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (37 commits) X.509: Fix indefinite length element skip error handling X.509: Convert some printk calls to pr_devel asymmetric keys: fix printk format warning MODSIGN: Fix 32-bit overflow in X.509 certificate validity date checking MODSIGN: Make mrproper should remove generated files. MODSIGN: Use utf8 strings in signer's name in autogenerated X.509 certs MODSIGN: Use the same digest for the autogen key sig as for the module sig MODSIGN: Sign modules during the build process MODSIGN: Provide a script for generating a key ID from an X.509 cert MODSIGN: Implement module signature checking MODSIGN: Provide module signing public keys to the kernel MODSIGN: Automatically generate module signing keys if missing MODSIGN: Provide Kconfig options MODSIGN: Provide gitignore and make clean rules for extra files MODSIGN: Add FIPS policy module: signature checking hook X.509: Add a crypto key parser for binary (DER) X.509 certificates MPILIB: Provide a function to read raw data into an MPI X.509: Add an ASN.1 decoder X.509: Add simple ASN.1 grammar compiler ...
2012-10-13Merge tag 'for_linus-3.7' of ↵Linus Torvalds1-0/+9
git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb Pull KGDB/KDB fixes and cleanups from Jason Wessel: "Cleanups - Clean up compile warnings in kgdboc.c and x86/kernel/kgdb.c - Add module event hooks for simplified debugging with gdb Fixes - Fix kdb to stop paging with 'q' on bta and dmesg - Fix for data that scrolls off the vga console due to line wrapping when using the kdb pager New - The debug core registers for kernel module events which allows a kernel aware gdb to automatically load symbols and break on entry to a kernel module - Allow kgdboc=kdb to setup kdb on the vga console" * tag 'for_linus-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb: tty/console: fix warnings in drivers/tty/serial/kgdboc.c kdb,vt_console: Fix missed data due to pager overruns kdb: Fix dmesg/bta scroll to quit with 'q' kgdboc: Accept either kbd or kdb to activate the vga + keyboard kdb shell kgdb,x86: fix warning about unused variable mips,kgdb: fix recursive page fault with CONFIG_KPROBES kgdb: Add module event hooks
2012-10-12vfs: define struct filename and have getname() return itJeff Layton2-4/+4
getname() is intended to copy pathname strings from userspace into a kernel buffer. The result is just a string in kernel space. It would however be quite helpful to be able to attach some ancillary info to the string. For instance, we could attach some audit-related info to reduce the amount of audit-related processing needed. When auditing is enabled, we could also call getname() on the string more than once and not need to recopy it from userspace. This patchset converts the getname()/putname() interfaces to return a struct instead of a string. For now, the struct just tracks the string in kernel space and the original userland pointer for it. Later, we'll add other information to the struct as it becomes convenient. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12mips,kgdb: fix recursive page fault with CONFIG_KPROBESJason Wessel1-0/+9
This fault was detected using the kgdb test suite on boot and it crashes recursively due to the fact that CONFIG_KPROBES on mips adds an extra die notifier in the page fault handler. The crash signature looks like this: kgdbts:RUN bad memory access test KGDB: re-enter exception: ALL breakpoints killed Call Trace: [<807b7548>] dump_stack+0x20/0x54 [<807b7548>] dump_stack+0x20/0x54 The fix for now is to have kgdb return immediately if the fault type is DIE_PAGE_FAULT and allow the kprobe code to decide what is supposed to happen. Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: David S. Miller <davem@davemloft.net> Cc: <stable@vger.kernel.org> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2012-10-11MIPS: MT: Remove kspd.Ralf Baechle3-448/+0
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-11MIPS: asm-offset.c: Delete unused irq_cpustat_t struct offsets.Ralf Baechle1-10/+0
Originally added in 05b541489c48e7fbeec19a92acf8683230750d0a [Merge with Linux 2.5.5.] over 10 years ago but never been used. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-11MIPS: proc: Cleanup printing of ASEs.Ralf Baechle1-9/+11
The number of %s was just getting ridiculous. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-11MIPS: Add detection of DSP ASE Revision 2.Steven J. Hill2-2/+5
[ralf@linux-mips.org: This patch really only detects the ASE and passes its existence on to userland via /proc/cpuinfo. The DSP ASE Rev 2. adds new resources but no resources that would need management by the kernel.] Signed-off-by: Steven J. Hill <sjhill@mips.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/4165/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-11MIPS: perf: Add perf functionality for BMIPS5000Al Cooper1-1/+102
Add hardware performance counter support to kernel "perf" code for BMIPS5000. The BMIPS5000 performance counters are similar to MIPS MTI cores, so the changes were mostly made in perf_event_mipsxx.c which is typically for MTI cores. Signed-off-by: Al Cooper <alcooperx@gmail.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/4109/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-11MIPS: perf: Split the Kconfig option CONFIG_MIPS_MT_SMPAl Cooper1-8/+8
Split the Kconfig option CONFIG_MIPS_MT_SMP into CONFIG_MIPS_MT_SMP and CONFIG_MIPS_PERF_SHARED_TC_COUNTERS so some of the code used for performance counters that are shared between threads can be used for MIPS cores that are not MT_SMP. Signed-off-by: Al Cooper <alcooperx@gmail.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/4108/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-11MIPS: perf: Remove unnecessary #ifdefAl Cooper1-5/+0
The #ifdef for CONFIG_HW_PERF_EVENTS is not needed because the Makefile will only compile the module if this config option is set. This means that the code under #else would never be compiled. This may have been done to leave the original broken code around for reference, but the FIXME comment above the code already shows the broken code. Signed-off-by: Al Cooper <alcooperx@gmail.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/4107/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-11MIPS: perf: Add cpu feature bit for PCI (performance counter interrupt)Al Cooper2-2/+5
The PCI (Program Counter Interrupt) bit in the "cause" register is mandatory for MIPS32R2 cores, but has also been added to some R1 cores (BMIPS5000). This change adds a cpu feature bit to make it easier to check for and use this feature. Signed-off-by: Al Cooper <alcooperx@gmail.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/4106/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-11MIPS: perf: Change the "mips_perf_event" table unsupported indicator.Al Cooper1-150/+4
Change the indicator from 0xffffffff in the "event_id" member to zero in the "cntr_mask" member. This removes the need to initialize entries that are unsupported. This also solves a problem where the number of entries in the table was increased based on a globel enum used for all platforms, but the new unsupported entries were not added for mips. This was leaving new table entries of all zeros that we not marked UNSUPPORTED. Signed-off-by: Al Cooper <alcooperx@gmail.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/4110/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-11MIPS: Align swapper_pg_dir to 64K for better TLB Refill code.David Daney1-2/+19
We can save an instruction in the TLB Refill path for kernel mappings by aligning swapper_pg_dir on a 64K boundary. The address of swapper_pg_dir can be generated with a single LUI instead of LUI/{D}ADDUI. The alignment of __init_end is bumped up to 64K so there are no holes between it and swapper_pg_dir, which is placed at the very beginning of .bss. The alignment of invalid_pmd_table and invalid_pte_table can be relaxed to PAGE_SIZE. We do this by using __page_aligned_bss, which has the added benefit of eliminating alignment holes in .bss. Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: linux-arch@vger.kernel.org, Cc: linux-kernel@vger.kernel.org Acked-by: Arnd Bergmann <arnd@arndb.de> Patchwork: https://patchwork.linux-mips.org/patch/4220/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-09Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds11-128/+149
Pull MIPS update from Ralf Baechle: "This is the MIPS update for 3.7. A fair chunk of them are platform updates to the Cavium Octeon SOC (which involves machine generated header files of considerable size), Atheros ATH79xx, RMI aka Netlogic aka Broadcom XLP, Broadcom BCM63xx platforms. Support for the commercial MIPS simulator MIPSsim has been removed as MIPS Technologies is shifting away from this product and Qemu is offering various more powerful platforms. The generic MIPS code can now also probe for no-execute / write-only TLB features implemented without the full SmartMIPS extension as permitted by the latest MIPS processor architecture. Lots of small changes to generic code." * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (78 commits) MIPS: ath79: Fix CPU/DDR frequency calculation for SRIF PLLs MIPS: ath79: use correct fractional dividers for {CPU,DDR}_PLL on AR934x MIPS: BCM63XX: Properly handle mac address octet overflow MIPS: Kconfig: Avoid build errors by hiding USE_OF from the user. MIPS: Replace `-' in defconfig filename wth `_' for consistency. MIPS: Wire kcmp syscall. MIPS: MIPSsim: Remove the MIPSsim platform. MIPS: NOTIFY_RESUME is not needed in TIF masks MIPS: Merge the identical "return from syscall" per-ABI code MIPS: Unobfuscate _TIF..._MASK MIPS: Prevent hitting do_notify_resume() with !user_mode(regs). MIPS: Replace 'kernel_uses_smartmips_rixi' with 'cpu_has_rixi'. MIPS: Add base architecture support for RI and XI. MIPS: Optimise TLB handlers for MIPS32/64 R2 cores. MIPS: uasm: Add INS and EXT instructions. MIPS: Avoid pipeline stalls on some MIPS32R2 cores. MIPS: Make VPE count to be one-based. MIPS: Add new end of interrupt functionality for GIC. MIPS: Add EIC support for GIC. MIPS: Code clean-ups for the GIC. ...
2012-10-08Merge branch 'rc-fixes' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild Pull kbuild fixes from Michal Marek: "Here are two fixes I intended to send after v3.6-rc7, but failed to do so. So please pull them for v3.7-rc1 and they will be picked up by stable. The first one fixes gcc -x <language> syntax in various build-time tests, which icecream and possible other gcc wrappers did not understand (and yes, icecream is going to be fixed as well). The second one fixes make tar-pkg so that unpacking the tarball does not replace the /lib -> /usr/lib symlink on recent Fedora releases." * 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: kbuild: Fix gcc -x syntax kbuild: Do not package /boot and /lib in make tar-pkg
2012-10-05Merge branch 'master' of git://dev.phrozen.org/mips-next into ↵Ralf Baechle2-18/+3
mips-for-linux-next
2012-10-03kbuild: Fix gcc -x syntaxJean Delvare1-1/+1
The correct syntax for gcc -x is "gcc -x assembler", not "gcc -xassembler". Even though the latter happens to work, the former is what is documented in the manual page and thus what gcc wrappers such as icecream do expect. This isn't a cosmetic change. The missing space prevents icecream from recognizing compilation tasks it can't handle, leading to silent kernel miscompilations. Besides me, credits go to Michael Matz and Dirk Mueller for investigating the miscompilation issue and tracking it down to this incorrect -x parameter syntax. Signed-off-by: Jean Delvare <jdelvare@suse.de> Acked-by: Ingo Molnar <mingo@kernel.org> Cc: stable@vger.kernel.org Cc: Bernhard Walle <bernhard@bwalle.de> Cc: Michal Marek <mmarek@suse.cz> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
2012-09-28Merge branch 'ralf-3.7' of ↵Ralf Baechle3-50/+121
git://git.linux-mips.org/pub/scm/sjhill/linux-sjhill into mips-for-linux-next
2012-09-28Merge branch 'rixi-3.7' of ↵Ralf Baechle1-1/+5
git://git.linux-mips.org/pub/scm/sjhill/linux-sjhill into mips-for-linux-next
2012-09-28Make most arch asm/module.h files use asm-generic/module.hDavid Howells1-1/+1
Use the mapping of Elf_[SPE]hdr, Elf_Addr, Elf_Sym, Elf_Dyn, Elf_Rel/Rela, ELF_R_TYPE() and ELF_R_SYM() to either the 32-bit version or the 64-bit version into asm-generic/module.h for all arches bar MIPS. Also, use the generic definition mod_arch_specific where possible. To this end, I've defined three new config bools: (*) HAVE_MOD_ARCH_SPECIFIC Arches define this if they don't want to use the empty generic mod_arch_specific struct. (*) MODULES_USE_ELF_RELA Arches define this if their modules can contain RELA records. This causes the Elf_Rela mapping to be emitted and allows apply_relocate_add() to be defined by the arch rather than have the core emit an error message. (*) MODULES_USE_ELF_REL Arches define this if their modules can contain REL records. This causes the Elf_Rel mapping to be emitted and allows apply_relocate() to be defined by the arch rather than have the core emit an error message. Note that it is possible to allow both REL and RELA records: m68k and mips are two arches that do this. With this, some arch asm/module.h files can be deleted entirely and replaced with a generic-y marker in the arch Kbuild file. Additionally, I have removed the bits from m32r and score that handle the unsupported type of relocation record as that's now handled centrally. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-09-28MIPS: Fix module.c build for 32 bitRalf Baechle3-120/+147
Fixes build failure introduced by "Make most arch asm/module.h files use asm-generic/module.h" by moving all the RELA processing code to a separate file to be used only for RELA processing on 64-bit kernels. CC arch/mips/kernel/module.o arch/mips/kernel/module.c:250:14: error: 'reloc_handlers_rela' defined but not used [-Werror=unused-variable] cc1: all warnings being treated as errors make[6]: *** [arch/mips/kernel/module.o] Error 1 Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-09-27Merge branch 'cn68xx-ciu2' of ↵Ralf Baechle3-26/+47
git://git.linux-mips.org/pub/scm/daney/upstream-daney into mips-for-linux-next
2012-09-26MIPS: Wire kcmp syscall.Ralf Baechle4-0/+4
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-22Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds1-1/+1
Pull MIPS fixes from Ralf Baechle: "Random fixes across arch/mips, essentially. One fix for an issue in get_user_pages_fast() which previously was discovered on x86, a miscalculation in the support for the MIPS MT hardware multithreading support, the RTC support for the Malta and a fix for a spurious interrupt issue that seems to bite only very special Malta configurations." * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: Malta: Don't crash on spurious interrupt. MIPS: Malta: Remove RTC Data Mode bootstrap breakage MIPS: mm: Add compound tail page _mapcount when mapped MIPS: CMP/SMTC: Fix tc_id calculation
2012-09-22MIPS: Merge the identical "return from syscall" per-ABI codeAl Viro5-51/+13
No need to keep 4 copies of that stuff; merged and taken to entry.S, unused public symbols there killed off. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-22MIPS: Prevent hitting do_notify_resume() with !user_mode(regs).Al Viro2-8/+3
Too late to do anything there... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-09-13MIPS: Add base architecture support for RI and XI.Steven J. Hill1-1/+5
Originally both Read Inhibit (RI) and Execute Inhibit (XI) were supported by the TLB only for a SmartMIPS core. The MIPSr3(TM) Architecture now defines an optional feature to implement these TLB bits separately. Support for one or both features can be checked by looking at the Config3.RXI bit. Signed-off-by: Steven J. Hill <sjhill@mips.com> Acked-by: David Daney <david.daney@cavium.com>
2012-09-13MIPS: Make VPE count to be one-based.Steven J. Hill1-0/+1
When dealing with multiple VPEs, the count needs to be one-based for correct initialization of the GIC. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Add new end of interrupt functionality for GIC.Steven J. Hill1-1/+1
Each platform should define its own 'gic_finish_irq' function. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Add EIC support for GIC.Steven J. Hill2-8/+95
Add support to use an external interrupt controller with the GIC. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Code clean-ups for the GIC.Steven J. Hill1-24/+16
Fix whitespace, beautify the code and remove debug statements. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Make GIC code platform independent.Steven J. Hill1-24/+11
The GIC interrupt code is used by multiple platforms and the current code was half Malta dependent code. These changes abstract away the platform specific differences. Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-09-13MIPS: Add support for the 1074K core.Steven J. Hill1-0/+4
Signed-off-by: Steven J. Hill <sjhill@mips.com>
2012-08-27MIPS: CMP/SMTC: Fix tc_id calculationRongQing.Li1-1/+1
Currently the tc_id code is: (read_c0_tcbind() >> TCBIND_CURTC_SHIFT) & TCBIND_CURTC; After processing this becomes: (read_c0_tcbind() >> 21) & ((0xff) << 21) But it should be: (read_c0_tcbind() & ((0xff)<< 21)) >> 21 Signed-off-by: RongQing.Li <roy.qing.li@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/4077/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-08-22MIPS: Fix build error for non-malta VSMP kernelAnoop P A1-0/+2
VSMP kernel build for non-malta platforms fails with following error LD init/built-in.o LD .tmp_vmlinux1 arch/mips/built-in.o: In function `vsmp_init_secondary': smp-mt.c:(.cpuinit.text+0x23cc): undefined reference to `gic_present' smp-mt.c:(.cpuinit.text+0x23d0): undefined reference to `gic_present' make: *** [.tmp_vmlinux1] Error 1 gic_present variable is declared only if IRQ_GIC is selected. Signed-off-by: Anoop P A <anoop.pa@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/2039/ Signed-off-by: John Crispin <blogic@openwrt.org>
2012-08-22MIPS: introduce CPU_R4K_FPUFlorian Fainelli1-18/+1
R4K-style CPUs have this boolean defined by default. Allows us to remove some lines in arch/mips/kernel/Makefile. Signed-off-by: Florian Fainelli <florian@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/3330/ Signed-off-by: John Crispin <blogic@openwrt.org>
2012-08-17MIPS: Synchronize MIPS count one CPU at a timeJayachandran C2-17/+13
The current implementation of synchronise_count_{master,slave} blocks slave CPUs in early boot until all of them come up. This no longer works because blocking a CPU with interrupts off after notifying the CPU to be online causes problems with the current kernel. Specifically, after the workqueue changes (commit a08489c569dc1 "Pull workqueue changes from Tejun Heo") the CPU_ONLINE notification callback workqueue_cpu_up_callback() will hang on wait_for_completion(&idle_rebind.done), if the slave CPUs are blocked for synchronize_count_slave(). The changes are to update synchronize_count_{master,slave}() to handle one CPU at a time and to call synchronise_count_master() in __cpu_up() so that the CPU_ONLINE notification goes out only after the COP0 COUNT register is synchronized. [ralf@linux-mips.org: This matter only to those few platforms which are using the cp0 counter as their clocksource which are XLP, XLR and MIPS' CMP solution.] Signed-off-by: Jayachandran C <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/4216/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-08-17MIPS: Module: Deal with malformed HI16/LO16 relocation sequences.Ralf Baechle1-7/+28
In case a series of R_MIPS_HI16 relocations was not followed by an R_MIPS_LO16 relocation we were leaking the hi16 relocation chain. Handle that error and return an error. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-08-17MIPS: Fix race condition in module relocation code.Ralf Baechle1-7/+6
The relocation code was essentially taken from the 2.4 modutils which perform relocation in userspace. In 2.6 relocation of multiple modules may be performed in parallel by the in-kernel loader so the global variable mips_hi16_list won't fly anymore. Fix race by moving it into mod_arch_specific. [ralf@linux-mips.org: folded in Tony's followup fix. Thanks Tony!] Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Tony Wu <tung7970@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/4189/
2012-08-17MIPS: Fix memory leak in error path of HI16/LO16 relocation handling.Ralf Baechle1-2/+7
Commit 6f5d2e970452b5c86906adcb8e7ad246f535ba39 (lmo) / 477c4b07406357ad93d0e32788dbf3ee814eadaa (kernel.org) [[MIPS: VPE: Free relocation chain on error.] fixed the same issue in the vpe loader in 2009 but back then the same bug in module.c went unfixed. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Reported-by: Akhilesh Kumar <akhilesh.lxr@gmail.com>
2012-08-01MIPS: Loongson 2: Sort out clock managment.Ralf Baechle3-173/+21
For unexplainable reasons the Loongson 2 clock API was implemented in a module so fixing this involved shifting large amounts of code around. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-07-30Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds6-181/+233
Pull MIPS updates from Ralf Baechle: "More hardware support across the field including a bunch of device drivers. The highlight however really are further steps towards device tree. This has been sitting in -next for ages. All MIPS _defconfigs have been tested to boot or where I don't have hardware available, to at least build fine." * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (77 commits) MIPS: Loongson 1B: Add defconfig MIPS: Loongson 1B: Add board support MIPS: Netlogic: early console fix MIPS: Netlogic: Fix indentation of smpboot.S MIPS: Netlogic: remove cpu_has_dc_aliases define for XLP MIPS: Netlogic: Remove unused pcibios_fixups MIPS: Netlogic: Add XLP SoC devices in FDT MIPS: Netlogic: Add IRQ mappings for more devices MIPS: Netlogic: USB support for XLP MIPS: Netlogic: XLP PCIe controller support. MIPS: Netlogic: Platform changes for XLR/XLS I2C MIPS: Netlogic: Platform NAND/NOR flash support MIPS: Netlogic: Platform changes for XLS USB MIPS: Netlogic: Remove NETLOGIC_ prefix MIPS: Netlogic: SMP wakeup code update MIPS: Netlogic: Update comments in smpboot.S MIPS: BCM63XX: Add 96328avng reference board MIPS: Expose PCIe drivers for MIPS MIPS: BCM63XX: Add PCIe Support for BCM6328 MIPS: BCM63XX: Move the PCI initialization into its own function ...