- Nov 20, 2013
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Rusty Russell authored
For the ELFv2 ABI, the hander is the entry point, not a function descriptor. We also need to set up r12, and fortunately the fast_exception_return exit path restores r12 for us so nothing else is required. Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Rusty Russell authored
No function descriptor, but we set r12 up and set TIF_RESTOREALL as it normally isn't restored on return from syscall. Signed-off-by:
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Rusty Russell authored
We leave it at zero (though it could be 1) for old tasks. Signed-off-by:
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Rusty Russell authored
Little endian ppc64 is getting an exciting new ABI. This is reflected by the bottom two bits of e_flags in the ELF header: 0 == legacy binaries (v1 ABI) 1 == binaries using the old ABI (compiled with a new toolchain) 2 == binaries using the new ABI. We store this in a thread flag, because we need to set it in core dumps and for signal delivery. Our chief concern is that it doesn't use function descriptors. Signed-off-by:
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Anton Blanchard authored
On little endian builds call H_SET_MODE so exceptions have the correct endianness. We need to reset the endian during kexec so do that in the MMU hashtable clear callback. Signed-off-by:
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Anton Blanchard authored
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- Nov 06, 2013
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Benjamin Herrenschmidt authored
When restoring the PPR value, we incorrectly access the thread structure at a time where MSR:RI is clear, which means we cannot recover from nested faults. However the thread structure isn't covered by the "bolted" SLB entries and thus accessing can fault. This fixes it by splitting the code so that the PPR value is loaded into a GPR before MSR:RI is cleared. Signed-off-by: -
Gavin Shan authored
We're assigning PE numbers after the completion of PCI probe. During the PCI probe, we had PE#0 as the super container to encompass all PCI devices. However, that's inappropriate since PELTM has ascending order of priority on search on P7IOC. So we need PE#127 takes the role that PE#0 has previously. For PHB3, we still have PE#0 as the reserved PE. The patch supposes that the underly firmware has built the RID to PE# mapping after resetting IODA tables: all PELTM entries except last one has invalid mapping on P7IOC, but all RTEs have binding to PE#0. The reserved PE# is being exported by firmware by device tree. Signed-off-by:
Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by:
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Gavin Shan authored
We need add PE to its own PELTV. Otherwise, the errors originated from the PE might contribute to other PEs. In the result, we can't clear up the error successfully even we're checking and clearing errors during access to PCI config space. Cc: stable@vger.kernel.org Reported-by:
<kalshett@in.ibm.com> Signed-off-by:
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Benjamin Herrenschmidt authored
Indirect XSCOM addresses normally have the top bit set (of the 64-bit address). This doesn't work via the normal debugfs interface, so we use a different encoding, which we need to convert before calling OPAL. Signed-off-by: -
Benjamin Herrenschmidt authored
The current debugfs interface to scom is essentially unused and racy. It uses two different files "address" and "data" to perform accesses which is at best impractical for anything but manual use by a developer. This replaces it with an "access" file which represent the entire scom address space which can be lseek/read/writen too. This file only supports accesses that are 8 bytes aligned and multiple of 8 bytes in size. The offset is logically the SCOM address multiplied by 8. Since nothing in userspace exploits that file at the moment, the ABI change is a no-brainer. Signed-off-by: -
Benjamin Herrenschmidt authored
On P8, XSCOM addresses has a special "indirect" form that requires more than 32-bits, so let's use u64 everywhere in the code instead of u32. Signed-off-by:
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- Nov 04, 2013
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Benjamin Herrenschmidt authored
The wrapper script needs an explicit rule for the "of" boot wrapper (generic wrapper, similar to pseries). Before 0c9fa291 it was hanlded implicitly by the statement: platformo=$object/"$platform".o But now that epapr.o needs to be added, that doesn't work and an explicit rule must be added. Signed-off-by:
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Benjamin Herrenschmidt authored
Fixes for build issues when LPB FIFO driver is configured as a module, removal of #ifdefs in mpc512x DIU platform code and a revert of recent changes to mpc52xx PIC driver. Wolfram provided a better fix for PIC driver build issue popping up when older gcc-4.3.5 is used.
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- Oct 31, 2013
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Vladimir Murzin authored
commit b6069a95 (filter: add MOD operation) added generic support for modulus operation in BPF. This patch brings JIT support for PPC64 Signed-off-by:
Vladimir Murzin <murzin.v@gmail.com> Acked-by:
Matt Evans <matt@ozlabs.org> Signed-off-by:
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Vladimir Murzin authored
Currently DIVWU stands for *signed* divw opcode: 7d 2a 4b 96 divwu r9,r10,r9 7d 2a 4b d6 divw r9,r10,r9 Use the *unsigned* divw opcode for DIVWU. Suggested-by:
Vassili Karpov <av1474@comtv.ru> Reviewed-by:
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Sudeep Holla authored
Since the definition of_find_next_cache_node is architecture independent, the existing definition in powerpc can be moved to driver/of/base.c Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by:
Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Signed-off-by:
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Sudeep Holla authored
Currently big endianness of the device tree data is assumed in of_find_next_cache_node for 'handle' when calling of_find_node_by_phandle. In preparation to move this function to common code, this patch fixes the endianness using 'be32_to_cpup' Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by:
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Michael Neuling authored
We currently turn IRQs off in __switch_to(0 but this is unnecessary as it's already disabled in the caller. This removes the IRQ disable but adds a check to make sure it is really off in case this changes in future. Signed-off-by:
Michael Neuling <mikey@neuling.org> Signed-off-by:
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Philippe Bergheaud authored
This is an optimization for the PowerPC in 64-bit little-endian. Bit counting is used in find_zero(), instead of the multiply and shift. It is modelled after Alan Modra's PowerPC LE strlen patch http://sourceware.org/ml/libc-alpha/2013-08/msg00097.html . Signed-off-by:
Philippe Bergheaud <felix@linux.vnet.ibm.com> Signed-off-by:
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Philippe Bergheaud authored
This enables the Berkeley Packet Filter JIT compiler for the PowerPC running in 64bit Little Endian. Signed-off-by:
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Dan Streetman authored
Currently, when not in hypervisor mode the kernel Oopses during suspend or hibernation when accessing the SDR1 register, because it is only available in hypervisor mode. Access to it needs to be protected in BEGIN/END_FW_FTR_SECTION. Signed-off-by:
Dan Streetman <ddstreet@ieee.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reported-by:
Jimmy Pan <jipan@redhat.com> Tested-by:
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Christian Kujau authored
for quite some time the following is printed (twice) after doing "make oldconfig": [...] scripts/kconfig/conf --oldconfig Kconfig warning: (ADB_PMU_LED_IDE) selects LEDS_TRIGGER_IDE_DISK which has unmet direct dependencies (NEW_LEDS && IDE_GD_ATA && LEDS_TRIGGERS) warning: (ADB_PMU_LED_IDE) selects LEDS_TRIGGER_IDE_DISK which has unmet direct dependencies (NEW_LEDS && IDE_GD_ATA && LEDS_TRIGGERS) The following patch causes ADB_PMU_LED to depend on IDE_GD_ATA, so that the options above are only available when IDE_GD_ATA is actually selected and thus eliminates the warning. Signed-off-by:
Christian Kujau <lists@nerdbynature.de> Signed-off-by:
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Cedric Le Goater authored
When reading partitions, the length has to be translated from big endian to the endian order of the host. Similarly, when writing partitions, the length needs to be in big endian order. The userspace tool 'nvram' needs a similar fix as it is reading and writing partitions through /dev/nram : http://sourceforge.net/p/powerpc-utils/mailman/message/31571277/ Signed-off-by:Cedric Le Goater <clg@fr.ibm.com> Signed-off-by:
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Cedric Le Goater authored
Signed-off-by:
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Cedric Le Goater authored
nvram_scan_partitions() is called twice when initializing the "lnx,oops-log" partition and the "ibm,rtas-log" partition. This fills the partition list with duplicate entries. This patch moves the partition scan in the init routine pseries_nvram_init_log_partitions() which is called only once. Signed-off-by:
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- Oct 30, 2013
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Brian Norris authored
Several functions are only ever referenced locally, so make them static. Of those functions, many of them are protected by an #if. However, the code which can compile fine in either case. Now that (1) the unneeded code is marked 'static' and (2) the code is only used under a C 'if (IS_ENABLED(CONFIG_FB_FSL_DIU))', the compiler can automatically remove the unneeded code, and we don't need the #if or the empty stub functions. Signed-off-by:
Brian Norris <computersforpeace@gmail.com> Signed-off-by:
Anatolij Gustschin <agust@denx.de>
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Anatolij Gustschin authored
The MPC5200 LPBFIFO driver requires the bestcomm module to be enabled, otherwise building will fail. Fix it. Cc: <stable@vger.kernel.org> # 3.10+ Reported-by:
Wolfgang Denk <wd@denx.de> Signed-off-by:
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Wolfram Sang authored
This more or less reverts commit 6391f697. Instead of adding an unneeded 'default', mark the variable to prevent the false positive 'uninitialized var'. The other change (fixing the printout) needs revert, too. We want to know WHICH critical irq failed, not which level it had. Signed-off-by:
Wolfram Sang <wsa@the-dreams.de> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Anatolij Gustschin <agust@denx.de> Acked-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
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Gerhard Sittig authored
a disabled Kconfig option results in a reference to a not implemented routine when the IS_ENABLED() macro is used for both conditional implementation of the routine as well as a C language source code test at the call site -- the "if (0) func();" construct only gets eliminated later by the optimizer, while the compiler already has emitted its warning about "func()" being undeclared provide an empty implementation for the mpc512x_setup_diu() and mpc512x_init_diu() routines in case of the disabled option, to avoid the compiler warning which is considered fatal and breaks compilation the bug appeared with commit 2abbbb63 "powerpc/mpc512x: move common code to shared.c file", how to reproduce: make mpc512x_defconfig echo CONFIG_FB_FSL_DIU=n >> .config && make olddefconfig make CC arch/powerpc/platforms/512x/mpc512x_shared.o .../arch/powerpc/platforms/512x/mpc512x_shared.c: In function 'mpc512x_init_early': .../arch/powerpc/platforms/512x/mpc512x_shared.c:456:3: error: implicit declaration of function 'mpc512x_init_diu' [-Werror=implicit-function-declaration] .../arch/powerpc/platforms/512x/mpc512x_shared.c: In function 'mpc512x_setup_arch': .../arch/powerpc/platforms/512x/mpc512x_shared.c:469:3: error: implicit declaration of function 'mpc512x_setup_diu' [-Werror=implicit-function-declaration] cc1: all warnings being treated as errors make[4]: *** [arch/powerpc/platforms/512x/mpc512x_shared.o] Error 1 Signed-off-by:
Gerhard Sittig <gsi@denx.de> CC: <stable@vger.kernel.org> # v3.11 Signed-off-by:
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Vasant Hegde authored
Code update interface for powernv platform. This provides sysfs interface to pass new image, validate, update and commit images. This patch includes: - Below OPAL APIs for code update - opal_validate_flash() - opal_manage_flash() - opal_update_flash() - Create below sysfs files under /sys/firmware/opal - image : Interface to pass new FW image - validate_flash : Validate candidate image - manage_flash : Commit/Reject operations - update_flash : Flash new candidate image Updating Image: "update_flash" is an interface to indicate flash new FW. It just passes image SG list to FW. Actual flashing is done during system reboot time. Note: - SG entry format: I have kept version number to keep this list similar to what PAPR is defined. Signed-off-by:Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by:
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Vasant Hegde authored
Create /sys/firmware/opal directory. We wil use this interface to fetch opal error logs, firmware update, etc. Signed-off-by:
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Anton Blanchard authored
Add a VMX optimised xor, used primarily for RAID5. On a POWER7 blade this is a decent win: 32regs : 17932.800 MB/sec altivec : 19724.800 MB/sec The bigger gain is when the same test is run in SMT4 mode, as it would if there was a lot of work going on: 8regs : 8377.600 MB/sec altivec : 15801.600 MB/sec I tested this against an array created without the patch, and also verified it worked as expected on a little endian kernel. [ Fix !CONFIG_ALTIVEC build -- BenH ] Signed-off-by:
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Geert Uytterhoeven authored
Correct reference to the location of the kexec_sequence() assembly helper. There never was a kexec_stub.S in mainline. Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
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Anton Blanchard authored
The condition register (CR) is a 32 bit quantity so we should use 32 bit loads and stores. Signed-off-by:
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Anton Blanchard authored
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Anton Blanchard authored
Enable a few modules required to boot on a POWER multipath box. Signed-off-by:
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Anton Blanchard authored
Run savedefconfig over the ppc64, ppc64e and pseries config Signed-off-by:
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Anton Blanchard authored
Using -mcpu=power7 allows gcc to use a number of new instructions including 64 bit byte reversed loads. Signed-off-by:
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Anton Blanchard authored
commit f13c13a0 (powerpc: Stop using non-architected shared_proc field in lppaca) fixed a potential issue with shared/dedicated partition detection. The old method of detection relied on an unarchitected field (shared_proc), and this patch switched to using something architected (a non zero yield_count). Unfortunately the assertion in the Linux header that yield_count is only non zero on shared processor partitions is not true. It turns out dedicated processor partitions can increment yield_count and as such we falsely detect dedicated partitions as shared. Fix the comment, and switch back to using the old method. Signed-off-by:
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