- 13 11月, 2013 8 次提交
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由 David S. Miller 提交于
To make the page tables compact, we were using 32-bit PGDs and PMDs. We only had to support <= 43 bits of physical addresses so this was quite feasible. In order to support larger physical addresses we have to move to 64-bit PGDs and PMDs. Most of the changes are straight-forward: 1) {pgd,pmd}_t --> unsigned long 2) Anything that tries to use plain "unsigned int" types with pgd/pmd values needs to be adjusted. In particular things like "0U" become "0UL". 3) {PGDIR,PMD}_BITS decrease by one. 4) In the assembler page table walkers, use "ldxa" instead of "lduwa" and adjust the low bit masks to clear out the low 3 bits instead of just the low 2 bits during pgd/pmd address formation. Also, use PTRS_PER_PGD and PTRS_PER_PMD in the sizing of the swapper_{pg_dir,low_pmd_dir} arrays. This patch does not try to take advantage of having 64-bits in the PMDs to simplify the hugepage code, that will come in a subsequent change. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
The impetus for this is that we would like to move to 64-bit PMDs and PGDs, but that would result in only supporting a 42-bit address space with the current page table layout. It'd be nice to support at least 43-bits. The reason we'd end up with only 42-bits after making PMDs and PGDs 64-bit is that we only use half-page sized PTE tables in order to make PMDs line up to 4MB, the hardware huge page size we use. So what we do here is we make huge pages 8MB, and fabricate them using 4MB hw TLB entries. Facilitate this by providing a "REAL_HPAGE_SHIFT" which is used in places that really need to operate on hardware 4MB pages. Use full pages (512 entries) for PTE tables, and adjust PMD_SHIFT, PGD_SHIFT, and the build time CPP test as needed. Use a CPP test to make sure REAL_HPAGE_SHIFT and the _PAGE_SZHUGE_* we use match up. This makes the pgtable cache completely unused, so remove the code managing it and the state used in mm_context_t. Now we have less spinlocks taken in the page table allocation path. The technique we use to fabricate the 8MB pages is to transfer bit 22 from the missing virtual address into the PTEs physical address field. That takes care of the transparent huge pages case. For hugetlb, we fill things in at the PTE level and that code already puts the sub huge page physical bits into the PTEs, based upon the offset, so there is nothing special we need to do. It all just works out. So, a small amount of complexity in the THP case, but this code is about to get much simpler when we move the 64-bit PMDs as we can move away from the fancy 32-bit huge PMD encoding and just put a real PTE value in there. With bug fixes and help from Bob Picco. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Choose PAGE_OFFSET dynamically based upon cpu type. Original UltraSPARC-I (spitfire) chips only supported a 44-bit virtual address space. Newer chips (T4 and later) support 52-bit virtual addresses and up to 47-bits of physical memory space. Therefore we have to adjust PAGE_SIZE dynamically based upon the capabilities of the chip. Note that this change alone does not allow us to support > 43-bit physical memory, to do that we need to re-arrange our page table support. The current encodings of the pmd_t and pgd_t pointers restricts us to "32 + 11" == 43 bits. This change can waste quite a bit of memory for the various tables. In particular, a future change should work to size and allocate kern_linear_bitmap[] and sparc64_valid_addr_bitmap[] dynamically. This isn't easy as we really cannot take a TLB miss when accessing kern_linear_bitmap[]. We'd have to lock it into the TLB or similar. Signed-off-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NBob Picco <bob.picco@oracle.com>
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由 David S. Miller 提交于
Some parts of the code use '41' others use '42', make them all use the same value. Signed-off-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NBob Picco <bob.picco@oracle.com>
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由 David S. Miller 提交于
This way we can see exactly what they are derived from, and in particular how they would change if we were to use a different PAGE_OFFSET value. Signed-off-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NBob Picco <bob.picco@oracle.com>
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由 David S. Miller 提交于
This makes clearer the implications for a given choosen value. Based upon patches by Bob Picco. Signed-off-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NBob Picco <bob.picco@oracle.com>
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由 David S. Miller 提交于
This pertains to all of the computations of the kernel fast TLB miss xor values. Based upon a patch by Bob Picco. Signed-off-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NBob Picco <bob.picco@oracle.com>
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由 David S. Miller 提交于
Older UltraSPARC chips had an address space hole due to the MMU only supporting 44-bit virtual addresses. The top end of this hole also has the same value as the current definition of PAGE_OFFSET, so this can be confusing. Consolidate the defines for the userspace mmap exclusion range into page_64.h and use them in sys_sparc_64.c and hugetlbpage.c Signed-off-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NBob Picco <bob.picco@oracle.com>
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- 12 11月, 2013 1 次提交
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由 Ingo Molnar 提交于
This reverts commit 8eba1842. uv_trace() is not used by anything, nor is uv_trace_nmi_func, nor uv_trace_func. That's not how we do instrumentation code in the kernel: we add tracepoints, printk()s, etc. so that everyone not just those with magic kernel modules can debug a system. So remove this unused (and misguied) piece of code. Signed-off-by: NIngo Molnar <mingo@kernel.org> Cc: Mike Travis <travis@sgi.com> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: Hedi Berriche <hedi@sgi.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Jason Wessel <jason.wessel@windriver.com> Link: http://lkml.kernel.org/n/tip-tumfBffmr4jmnt8Gyxanoblg@git.kernel.org
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- 11 11月, 2013 1 次提交
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由 Rob Herring 提交于
Commit b5b4bb3f (of: only include prom.h on sparc) removed implicit includes of of_*.h headers by powerpc's prom.h. Some components were missed in initial clean-up patch, so add the necessary includes to fix powerpc builds. Signed-off-by: NRob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Tejun Heo <tj@kernel.org> Cc: Matt Mackall <mpm@selenic.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-ide@vger.kernel.org Cc: linux-crypto@vger.kernel.org
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- 08 11月, 2013 17 次提交
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由 Michal Simek 提交于
Trivial. Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
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由 Michal Simek 提交于
Fix mmap2 behaviour which incorrectly works with pgoff not in 4k units. Reported-by: NRich Felker <dalias@aerifal.cx> Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
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由 Michal Simek 提交于
Use standard syscall definition. Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
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由 Michal Simek 提交于
Removed IRQF_DISABLED as it's no-op and should be removed. Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
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由 Dan Carpenter 提交于
If "nid == MAX_NUMNODES" then we write beyond the end of the node_data[] array. Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Signed-off-by: NJames Hogan <james.hogan@imgtec.com>
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由 Helge Deller 提交于
New defconfigs which should be able to boot on any 32/64bit machine. Many drivers are selected to be compiled-in to avoid the need for an additional initrd and still being able to boot. Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Helge Deller 提交于
Clean up code to send correct signal on invalid memory accesses: Send SIGBUS instead of SIGSEGV for memory accesses outside of mmap'ed areas This fixes the mmap13 testcase from the Linux Test Project. Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Helge Deller 提交于
Up to now PA-RISC could live with a trivial version of access_ok(). Our fault handlers can correctly handle fault cases. But testcases showed that we need a better access check else we won't always return correct errno failure codes to userspace. Problem showed up during 32bit userspace tests in which writev() used a 32bit memory area and length which would then wrap around on 64bit kernel. Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Helge Deller 提交于
In case we fail to power up other CPUs in a SMP system, the kernel currently shows a wrong number of online CPUs. This change makes the output more verbose on how many of the CPUs are online. Example: CPU(s): 1 out of 2 PA8800 (Mako) at 900.000000 MHz online. Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Helge Deller 提交于
The number of IPI calls is already visible as per-cpu IPI irq counters in/proc/cpuinfo, so let's drop this additional counting. This partly reverts: cd85d551 parisc: more irq statistics in /proc/interrupts Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Helge Deller 提交于
Each CPU has it's own Control Register 16 (CR16) which is used as time source for the udelay() function. But since the CR16 registers across different CPUs are not synced, we need to recalculate the loop count if we get switched away to ensure that we really delay as much time as requested. Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Michael Opdenacker 提交于
This patch removes a duplicate define from arch/parisc/math-emu/float.h Signed-off-by: NMichael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Helge Deller 提交于
Install targets (install, zinstall, uinstall) on parisc have a dependency to vmlinux. This may cause parts of the kernel to be rebuilt during installation. We must avoid this since this may run as root. Install targets "ABSOLUTELY MUST NOT MODIFY THE SOURCE TREE." as Linus emphasized this in: http://lkml.org/lkml/2013/7/10/600 So on parisc and maybe other archs we need the same as for x86: 1648e4f8 x86, kbuild: make "make install" not depend on vmlinux This parisc patch was inspired by: 19514fc6 arm, kbuild: make "make install" not depend on vmlinux Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Helge Deller 提交于
Implement missing functions for parisc to provide kernel audit feature. Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Helge Deller 提交于
Provide a macro ASM_EXCEPTIONTABLE_ENTRY() to create exception table entries and convert all open-coded places to use that macro. This patch is a first step toward creating a exception table which only holds 32bit pointers even on a 64bit kernel. That way in my own kernel I was able to reduce the in-kernel exception table from 44kB to 22kB. Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Paul Gortmaker 提交于
The commit 712b6aa8 [Nov7 linux-next via tip/auto-latest] ("intel_mid: Renamed *mrst* to *intel_mid*") adds a __cpuinit. We removed this a couple versions ago; we now want to remove the compat no-op stubs. Introducing new users is not what we want to see at this point in time, as it will break once the stubs are gone. Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Cc: David Cohen <david.a.cohen@linux.intel.com> Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com> Link: http://lkml.kernel.org/r/1383849290-11250-1-git-send-email-paul.gortmaker@windriver.comSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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由 Sudeep KarkadaNagesha 提交于
The non-IPI interrupts are displayed only for the online cpus from show_interrupts in kernel/irq/proc.c before calling arch_show_interrupts(). As a result, the column headers and the IPI count don't match if any CPU is offline. This patch fixes show_ipi_list to display IPIs for online CPUs only. Signed-off-by: NSudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 07 11月, 2013 10 次提交
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由 Axel Lin 提交于
This patch converts irq-bcm2835 driver to use the new IRQCHIP_DECLARE and irqchip_init. Signed-off-by: NAxel Lin <axel.lin@ingics.com> Tested-by: NStephen Warren <swarren@wwwdotorg.org> Cc: Simon Arlott <simon@fire.lp0.eu> Cc: Olof Johansson <olof@lixom.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: linux-rpi-kernel@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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由 Fenghua Yu 提交于
In reboot and crash path, when we shut down the local APIC, the I/O APIC is still active. This may cause issues because external interrupts can still come in and disturb the local APIC during shutdown process. To quiet external interrupts, disable I/O APIC before shutdown local APIC. Signed-off-by: NFenghua Yu <fenghua.yu@intel.com> Link: http://lkml.kernel.org/r/1382578212-4677-1-git-send-email-fenghua.yu@intel.com Cc: <stable@kernel.org> [ I suppose the 'issue' is a hang during shutdown. It's a fine change nevertheless. ] Signed-off-by: NIngo Molnar <mingo@kernel.org>
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由 Vineet Gupta 提交于
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
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由 Jiang Liu 提交于
Commit 9a46ad6d "smp: make smp_call_function_many() use logic similar to smp_call_function_single()" has unified the way to handle single and multiple cross-CPU function calls. Now only one interrupt is needed for architecture specific code to support generic SMP function call interfaces, so kill the redundant single function call interrupt. Signed-off-by: NJiang Liu <jiang.liu@huawei.com> Cc: Jiang Liu <liuj97@gmail.com> Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
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由 Vineet Gupta 提交于
RTSC is strictly incore and must not be allowed in SMP configs Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
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由 Michal Simek 提交于
The kernel needs to setup the first two tlbs with pad which is used for early page allocation which is used by mapin_ram() to allocate tables for lowmem memory before memory initialisation is done. Calculate pad directly from lowmem size. Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
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由 Jayachandran C 提交于
The early_init_devtree() API was removed in linux-next for 3.13 with commit "mips: use early_init_dt_scan". This causes Netlogic XLP compile to fail: arch/mips/netlogic/xlp/setup.c:101: undefined reference to `early_init_devtree' Add xlp_early_init_devtree() which uses the __dt_setup_arch() to handle early device tree related initialization to fix this. Signed-off-by: NJayachandran C <jchandra@broadcom.com> Signed-off-by: NRob Herring <rob.herring@calxeda.com>
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由 Oleg Nesterov 提交于
Currently xol_get_insn_slot() assumes that we should simply copy arch_uprobe->insn[] which is (ignoring arch_uprobe_analyze_insn) just the copy of the original insn. This is not true for arm which needs to create another insn to execute it out-of-line. So this patch simply adds the new member, ->ixol into the union. This doesn't make any difference for x86 and powerpc, but arm can divorce insn/ixol and initialize the correct xol insn in arch_uprobe_analyze_insn(). Signed-off-by: NOleg Nesterov <oleg@redhat.com>
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由 David A. Long 提交于
Move the function declarations from the arch headers to the common header, since only the function bodies are architecture-specific. These changes are from Vincent Rabin's uprobes patch. [ oleg: update arch/powerpc/include/asm/uprobes.h ] Signed-off-by: NRabin Vincent <rabin@rab.in> Signed-off-by: NDavid A. Long <dave.long@linaro.org> Signed-off-by: NOleg Nesterov <oleg@redhat.com>
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由 H. Peter Anvin 提交于
The variable hv_lapic_frequency causes an unused variable warning if CONFIG_X86_LOCAL_APIC is disabled. Since the variable is only used inside a small if statement, move the declaration of that variable into the if statement itself. Cc: K. Y. Srinivasan <kys@microsoft.com> Link: http://lkml.kernel.org/r/1381444224-3303-1-git-send-email-kys@microsoft.comSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 06 11月, 2013 3 次提交
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由 Michael Opdenacker 提交于
This patch removes a duplicate define from arch/mips/boot/ecoff.h Signed-off-by: NMichael Opdenacker <michael.opdenacker@free-electrons.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/6081/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Catalin Marinas 提交于
Commit 52ea2a56 (arm64: locks: introduce ticket-based spinlock implementation) introduces the arch_spin_is_contended() function making CONFIG_GENERIC_LOCKBREAK unnecessary. Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com> Acked-by: NWill Deacon <will.deacon@arm.com>
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由 Yan, Zheng 提交于
Unlike other uncore boxes, IRP boxes live in PCI buses with no UBOX device. For PCI bus without UBOX device, we find the next bus that has UBOX device and use its 'bus to socket' mapping. Besides the counter/control registers in IRP boxes are not properly aligned. Signed-off-by: NYan, Zheng <zheng.z.yan@intel.com> Signed-off-by: NPeter Zijlstra <peterz@infradead.org> Cc: eranian@google.com Cc: "Yan Zheng" <zheng.z.yan@intel.com> Link: http://lkml.kernel.org/r/1383197815-17706-2-git-send-email-zheng.z.yan@intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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