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* i386: fix asm constraint in do_IRQ()Jan Beulich2008-04-26
| | | | | | | Two prior changes resulted in the "ecx" clobber being lost. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'master' of ↵Linus Torvalds2008-04-25
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (49 commits) [POWERPC] Add zImage.iseries to arch/powerpc/boot/.gitignore [POWERPC] bootwrapper: fix build error on virtex405-head.S [POWERPC] 4xx: Fix 460GT support to not enable FPU [POWERPC] 4xx: Add NOR FLASH entries to Canyonlands and Glacier dts [POWERPC] Xilinx: of_serial support for Xilinx uart 16550. [POWERPC] Xilinx: boot support for Xilinx uart 16550. [POWERPC] celleb: Add support for PCI Express [POWERPC] celleb: Move miscellaneous files for Beat [POWERPC] celleb: Move a file for SPU on Beat [POWERPC] celleb: Move files for Beat mmu and iommu [POWERPC] celleb: Move files for Beat hvcall interfaces [POWERPC] celleb: Move the SCC related code for celleb [POWERPC] celleb: Move the files for celleb base support [POWERPC] celleb: Consolidate io-workarounds code [POWERPC] cell: Generalize io-workarounds code [POWERPC] Add CONFIG_PPC_PSERIES_DEBUG to enable debugging for platforms/pseries [POWERPC] Convert from DBG() to pr_debug() in platforms/pseries/ [POWERPC] Register udbg console early on pseries LPAR [POWERPC] Mark udbg console as CON_ANYTIME, ie. callable early in boot [POWERPC] Set udbg_console index to 0 ...
| * [POWERPC] Add zImage.iseries to arch/powerpc/boot/.gitignoreKumar Gala2008-04-24
| | | | | | | | | | Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] bootwrapper: fix build error on virtex405-head.SGrant Likely2008-04-24
| | | | | | | | | | | | | | | | virtex405-head.S is an assembler file, not a C file; therefore BOOTAFLAGS is the correct place to set the needed -mcpu=405 flag. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| * [POWERPC] 4xx: Fix 460GT support to not enable FPUStefan Roese2008-04-24
| | | | | | | | | | | | | | The AMCC 460GT doesn't have an FPU so let's not enable support for it. Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| * [POWERPC] 4xx: Add NOR FLASH entries to Canyonlands and Glacier dtsStefan Roese2008-04-24
| | | | | | | | | | | | | | | | This patch adds default NOR entries to the AMCC Canyonlands (460EX) and Glacier (460GT) dts files. Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| * [POWERPC] Xilinx: boot support for Xilinx uart 16550.John Linn2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Xilinx 16550 uart core is not a standard 16550 because it uses word-based addressing rather than byte-based adressing. With additional properties it is compatible with the open firmware 'ns16550' compatible binding. This code updates the ns16550 driver to use the reg-offset property so that the Xilinx UART 16550 can be used with it. The reg-shift was already being handled. Signed-off-by: John Linn <john.linn@xilinx.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| * [POWERPC] celleb: Add support for PCI ExpressIshizaki Kou2008-04-24
| | | | | | | | | | | | | | | | | | | | This adds support for PCI Express port on Celleb. I/O space of this PCI Express port is not mapped in memory space. So we use the io-workaround mechanism to make accesses indirect. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] celleb: Move miscellaneous files for BeatIshizaki Kou2008-04-24
| | | | | | | | | | | | | | | | | | | | This moves miscellaneous files for Beat into platforms/cell/. All files in this patch are used by celleb-beat only. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] celleb: Move a file for SPU on BeatIshizaki Kou2008-04-24
| | | | | | | | | | | | | | | | | | This moves SPU support code on Beat into platforms/cell/. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] celleb: Move files for Beat mmu and iommuIshizaki Kou2008-04-24
| | | | | | | | | | | | | | | | | | | | This moves files for mmu and iommu on Beat into platforms/cell/. All files in this patch are used by celleb-beat only. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] celleb: Move files for Beat hvcall interfacesIshizaki Kou2008-04-24
| | | | | | | | | | | | | | | | | | | | This moves files for Beat hvcall interfaces into platforms/cell/. All files in this patch are used by celleb-beat only. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] celleb: Move the SCC related code for cellebIshizaki Kou2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | This moves the SCC (Super Companion Chip) related code for celleb into platforms/cell/. All files in this patch are used by celleb-beat and celleb-native commonly. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] celleb: Move the files for celleb base supportIshizaki Kou2008-04-24
| | | | | | | | | | | | | | | | | | | | This moves the base code for celleb support into platforms/cell/. All files in this patch are used by celleb-beat and celleb-native commonly. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] celleb: Consolidate io-workarounds codeIshizaki Kou2008-04-24
| | | | | | | | | | | | | | | | | | | | | | Now, we can use generic io-workarounds mechanism and the workaround code for spider-pci. This changes Celleb PCI code to use spider-pci code. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] cell: Generalize io-workarounds codeIshizaki Kou2008-04-24
| | | | | | | | | | | | | | | | | | | | This splits cell io-workaround code into spider-pci dependent code and a generic part, and also moves io-workarounds initialization into cell_setup_phb. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Add CONFIG_PPC_PSERIES_DEBUG to enable debugging for platforms/pseriesMichael Ellerman2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a DEBUG config setting which turns on all (most) of the debugging under platforms/pseries. To have this take effect we need to remove all the #undef DEBUG's, in various files. We leave the #undef DEBUG in platforms/pseries/lpar.c, as this enables debugging printks from the low-level hash table routines, and tends to make your system unusable. If you want those enabled you still have to turn them on by hand. Also some of the RAS code has a DEBUG block which causes a functional change, so I've keyed this off a different (non-existant) debug #define. This is only enabled if you have PPC_EARLY_DEBUG enabled also. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Convert from DBG() to pr_debug() in platforms/pseries/Michael Ellerman2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In pseries/lpar.c, fix some printf specifier mismatches, and add a newline to one printk. In pseries/rtasd.c add "rtasd" to some messages to make it clear where they're coming from. In pseries/scanlog.c remove the hand-rolled runtime debugging support in there. This file has been largely unchanged for eons, if we need to debug it in future we can recompile. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Register udbg console early on pseries LPARMichael Ellerman2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | On pseries LPAR we can call the udbg routines, and the udbg console very early. So mark the udbg console as safe to call early in boot, and register the udbg console as soon as the udbg routines are hooked up. This allows platforms/pseries code to use printk() and pr_debug() rather than needing to call udbg_printf() directly for early debugging. This is nice because a) it's standard, b) it goes via the printk buffer, and c) you can get printk time stamps. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Mark udbg console as CON_ANYTIME, ie. callable early in bootMichael Ellerman2008-04-24
| | | | | | | | | | | | | | | | | | | | The udbg console should be safe to call basically at any time after boot. It does not need any per-cpu resources or for the cpu to be online, as long as there is a udbg_putc routine hooked up it should work. So mark it as CON_ANYTIME. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Set udbg_console index to 0Michael Ellerman2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Because the udbg_console has CON_ENABLED set, it's possible that when we register it with the console code the index won't be set. This leads to slightly confusing boot messages like: [ 0.000000] console [udbg-1] enabled We could remove CON_ENABLED, but we don't want to do that, we always want the udbg console to be activated, even if the user specified some other console on the command line. The simplest fix seems to be just to set the index to 0 by hand. There is no issue with duplicate udbg consoles, as we guard against registering multiple times in register_early_udbg_console(). Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Raise the upper limit of NR_CPUS and move the pacas into the BSSTony Breeds2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds the required functionality to fill in all pacas at runtime. With NR_CPUS=1024 text data bss dec hex filename 137 1704032 0 1704169 1a00e9 arch/powerpc/kernel/paca.o :Before 121 1179744 524288 1704153 1a00d9 arch/powerpc/kernel/paca.o :After Also remove unneeded #includes from arch/powerpc/kernel/paca.c Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Make iSeries spin on __secondary_hold_spinloop, like pSeriesTony Breeds2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently all iSeries secondary CPUs spin directly on the cpu_start field in their paca. Make them spin on the global __secondary_hold_spinloop until after the pacas have been initialised. As Stephen Rothwell points out, this works at the moment because __secondary_hold_spinloop is being set already, but iSeries isn't looking at it :) Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Clean up misc_64.SKumar Gala2008-04-24
| | | | | | | | | | | | | | | | * Removed get_msr(), get_srr0(), and get_srr1() - not used anywhere * Use STACK_FRAME_OVERHEAD instead of magic number Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Use of_get_next_parent() in platforms/cell/axon_msi.cMichael Ellerman2008-04-24
| | | | | | | | | | | | | | Replace two open-coded occurences of the of_get_next_parent() logic. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Discourage people from fiddling with kernel data from prom_initMichael Ellerman2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As BenH said the other day, it is an "accident" that prom_init.o is linked with the rest of the kernel. The truth is a little more subtle, prom_init isn't truly bootloader, it does access kernel data in a few places. What we can do is discourage people from adding new code that accesses data outside of prom_init. And hence this patch; from the script: # This script checks prom_init.o to see what external symbols it # is using, if it finds symbols not in the whitelist it returns # an error. The point of this is to discourage people from # intentionally or accidentally adding new code to prom_init.c # which has side effects on other parts of the kernel. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Cleanup asm-offsets.cKumar Gala2008-04-24
| | | | | | | | | | | | | | | | | | * Removed TI_EXECDOMAIN define as its not used anywhere * Use STACK_INT_FRAME_SIZE to allow common define of INT_FRAME_SIZE * Define TI_CPU on both ppc32 & ppc64 (removes an ifdef). Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Clean up access to thread_info in assemblyKumar Gala2008-04-24
| | | | | | | | | | | | | | | | Use (31-THREAD_SHIFT) to get to thread_info from stack pointer. This makes the code a bit easier to read and more robust if we ever change THREAD_SHIFT. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Fix new warnings arising from stacktrace patchChristoph Hellwig2008-04-24
| | | | | | | | | | | | | | | | | | Remove the inclusion of asm-offsets.h from stacktrace.c. It isn't supposed to be included in C code and it causes problems with multiple definitions of things. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Port fixmap from x86 and use for kmap_atomicKumar Gala2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The fixmap code from x86 allows us to have compile time virtual addresses that we change the physical addresses of at run time. This is useful for applications like kmap_atomic, PCI config that is done via direct memory map, kexec/kdump. We got ride of CONFIG_HIGHMEM_START as we can now determine a more optimal location for PKMAP_BASE based on where the fixmap addresses start and working back from there. Additionally, the kmap code in asm-powerpc/highmem.h always had debug enabled. Moved to using CONFIG_DEBUG_HIGHMEM to determine if we should have the extra debug checking. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] 85xx: Add support for relocatable kernel (and booting at non-zero)Kumar Gala2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Added support to allow an 85xx kernel to be run from a non-zero physical address (useful for cooperative asymmetric multiprocessing situations and kdump). The support can be configured at compile time by setting CONFIG_PAGE_OFFSET, CONFIG_KERNEL_START, and CONFIG_PHYSICAL_START as desired. Alternatively, the kernel build can set CONFIG_RELOCATABLE. Setting this config option causes the kernel to determine at runtime the physical addresses of CONFIG_PAGE_OFFSET and CONFIG_KERNEL_START. If CONFIG_RELOCATABLE is set, then CONFIG_PHYSICAL_START has no meaning. However, CONFIG_PHYSICAL_START will always be used to set the LOAD program header physical address field in the resulting ELF image. Currently we are limited to running at a physical address that is a multiple of 256M. This is due to how we map TLBs to cover lowmem. This should be fixed to allow 64M or maybe even 16M alignment in the future. It is considered an error to try and run a kernel at a non-aligned physical address. All the magic for this support is accomplished by proper initialization of the kernel memory subsystem and use of ARCH_PFN_OFFSET. The use of ARCH_PFN_OFFSET only affects normal memory and not IO mappings. ioremap uses map_page and isn't affected by ARCH_PFN_OFFSET. /dev/mem continues to allow access to any physical address in the system regardless of how CONFIG_PHYSICAL_START is set. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Add strncmp to arch/ppcJosh Boyer2008-04-24
| | | | | | | | | | | | | | | | | | | | Commit 0119536cd314ef95553604208c25bc35581f7f0a added an assembly version of strncmp to PowerPC. However, it changed a common header file between arch/ppc and arch/powerpc without adding strncmp to arch/ppc. This fixes that omission so that arch/ppc links again. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Fix mv64x60 early console code to use cell-index propertyRemi Machet2008-04-24
| | | | | | | | | | | | | | | | | | | | | | The MPSC driver and prpmc2800.dts have been modified to use property 'cell-index' as the serial port number, but the early serial console driver for the mv64x60 has not been modified to use this new property. This fixes it. Signed-off-by: Remi Machet (rmachet@slac.stanford.edu) Acked-by: Dale Farnsworth <dale@farnsworth.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Initialize all mv64x60 devices even if one failsRemi Machet2008-04-24
| | | | | | | | | | | | | | | | | | | | | | If one of the devices of the mv64x60 init fails, the remaining devices are not initialized. This changes the code to display an error and continue the initialization. Signed-off-by: Remi Machet (rmachet@slac.stanford.edu) Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Use default values if necessary in mv64x60 I2C initializationRemi Machet2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | I2C parameters freq_m and freq_n are assigned defaults in the code, but if properties for those parameters are not found in the open firmware description the init routine returns an error and doesn't create the platform device. This changes the code so that it doesn't return an error if the properties are not found but instead uses the default values. Signed-off-by: Remi Machet (rmachet@slac.stanford.edu) Acked-by: Dale Farnsworth <dale@farnsworth.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Fix kernel stack allocation alignmentBenjamin Herrenschmidt2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The powerpc kernel stacks need to be naturally aligned, as they contain the thread info at the bottom, which is obtained by clearing the low bits of the stack pointer. However, when using 64K pages, the stack is smaller than a page, so we use kmalloc to allocate it, but that doesn't provide the alignment guarantee we need. It appeared to work so far... until one enables SLUB debugging which then returns unaligned pointers. Ooops... This fixes it by using a slab cache with enforced alignment. It relies on my previous patch that adds a thread_info_cache_init() callback. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Add include of linux/of.h to os-area.cMichael Ellerman2008-04-24
| | | | | | | | | | | | | | os-area.c requires routines declared in linux/of.h, so should include it. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Add include of linux/of.h to numa.cMichael Ellerman2008-04-24
| | | | | | | | | | | | | | numa.c requires routines declared in linux/of.h, so should include it. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * Merge branch 'powerpc-next' of ↵Paul Mackerras2008-04-24
| |\ | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc
| | * [POWERPC] ppc32: Fix errata for 603 CPUsKumar Gala2008-04-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 603 CPUs have the same issue that some 750 CPUs have in that they can crash in funny ways if a store from an FPU register instruction is executed on a register that has never been initialized since power on. This patch fixes it by making sure all FP registers have been properly initialized at kernel boot. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| | * [PPC] Remove mpc885ads and mpc86x ads boards from arch/ppcKumar Gala2008-04-21
| | | | | | | | | | | | | | | | | | We have a board port in arch/powerpc so we dont need this one anymore. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| | * [PPC] Remove mpc8272 ads board from arch/ppcKumar Gala2008-04-21
| | | | | | | | | | | | | | | | | | We have a board port in arch/powerpc so we dont need this one anymore. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * | Revert "[POWERPC] Add compat handler for PTRACE_GETSIGINFO"Paul Mackerras2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit e4cc58944c1e2ce41e3079d4eb60c95e7ce04b2b, as requested by Roland McGrath, because compat_ptrace_request (added in commit e16b27816462de700f9508d86954410c41105dc2, "ptrace: compat_ptrace_request siginfo") now handles this case. Signed-off-by: Paul Mackerras <paulus@samba.org>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2008-04-25
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-pat * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-pat: generic: add ioremap_wc() interface wrapper /dev/mem: make promisc the default pat: cleanups x86: PAT use reserve free memtype in mmap of /dev/mem x86: PAT phys_mem_access_prot_allowed for dev/mem mmap x86: PAT avoid aliasing in /dev/mem read/write devmem: add range_is_allowed() check to mmap of /dev/mem x86: introduce /dev/mem restrictions with a config option
| * | | /dev/mem: make promisc the defaultIngo Molnar2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | default to the old semantics. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | pat: cleanupsIngo Molnar2008-04-24
| | | | | | | | | | | | | | | | Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: PAT use reserve free memtype in mmap of /dev/memvenkatesh.pallipadi@intel.com2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use reserve_memtype and free_memtype wrappers for /dev/mem mmaps. The memtype is slightly complicated here, given that we have to support existing X mappings. We fallback on UC_MINUS for that. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: PAT phys_mem_access_prot_allowed for dev/mem mmapvenkatesh.pallipadi@intel.com2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce phys_mem_access_prot_allowed(), which checks whether the mapping is possible, without any conflicts and returns success or failure based on that. phys_mem_access_prot() by itself does not allow failure case. This ability to return error is needed for PAT where we may have aliasing conflicts. x86 setup __HAVE_PHYS_MEM_ACCESS_PROT and move x86 specific code out of /dev/mem into arch specific area. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: PAT avoid aliasing in /dev/mem read/writevenkatesh.pallipadi@intel.com2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add xlate and unxlate around /dev/mem read/write. This sets up the mapping that can be used for /dev/mem read and write without aliasing worries. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: introduce /dev/mem restrictions with a config optionArjan van de Ven2008-04-24
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces a restriction on /dev/mem: Only non-memory can be read or written unless the newly introduced config option is set. The X server needs access to /dev/mem for the PCI space, but it doesn't need access to memory; both the file permissions and SELinux permissions of /dev/mem just make X effectively super-super powerful. With the exception of the BIOS area, there's just no valid app that uses /dev/mem on actual memory. Other popular users of /dev/mem are rootkits and the like. (note: mmap access of memory via /dev/mem was already not allowed since a really long time) People who want to use /dev/mem for kernel debugging can enable the config option. The restrictions of this patch have been in the Fedora and RHEL kernels for at least 4 years without any problems. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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