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* powerpc: Unaligned stores and stmw are broken in emulation codeTom Musta2013-08-27
| | | | | | | | | | | | | The stmw instruction was incorrectly decoded as an update form instruction and thus the RA register was being clobbered. Also, the utility routine to write memory to unaligned addresses breaks the operation into smaller aligned accesses but was incorrectly incrementing the address by only one; it needs to increment the address by the size of the smaller aligned chunk. Signed-off-by: Tom Musta <tmusta@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/mm: Mark Memory Resources as busyNathan Fontenot2013-08-27
| | | | | | | | Memory I/O resources need to be marked as busy or else we cannot remove them when doing memory hot remove. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge remote-tracking branch 'scott/next' into nextBenjamin Herrenschmidt2013-08-26
|\ | | | | | | | | | | | | | | | | | | Latest FSL updates from Scott: << Highlights include changes in compiler flag settings on e500 family cores, booke64 hibernation support, support for two new boards, and an erratum workaround. >>
| * powerpc/85xx: Add C293PCIE board supportMingkai Hu2013-08-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | C293PCIE board is a series of Freescale PCIe add-in cards to perform as public key crypto accelerator or secure key management module. - 512KB platform SRAM in addition to 512K L2 Cache/SRAM - 512MB soldered DDR3 32bit memory - CPLD System Logic - 64MB x16 NOR flash and 4GB x8 NAND flash - 16MB SPI flash Signed-off-by: Mingkai Hu <Mingkai.Hu@freescale.com> Signed-off-by: Po Liu <Po.Liu@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
| * powerpc/85xx: Add silicon device tree for C293Mingkai Hu2013-08-23
| | | | | | | | | | | | Signed-off-by: Mingkai Hu <Mingkai.Hu@freescale.com> Signed-off-by: Po Liu <Po.Liu@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
| * powerpc/85xx: Add SEC6.0 device treeMingkai Hu2013-08-23
| | | | | | | | | | | | | | | | Add device tree for SEC 6.0 used on C29x silicon. Signed-off-by: Mingkai Hu <Mingkai.Hu@freescale.com> Signed-off-by: Po Liu <Po.Liu@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
| * powerpc: add Book E support to 64-bit hibernationWang Dongsheng2013-08-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update the 64-bit hibernation code to support Book E CPUs. Some registers and instructions are not defined for Book3e (SDR reg, tlbia instruction). SDR: Storage Description Register. Book3S and Book3E have different address translation mode, we do not need HTABORG & HTABSIZE to translate virtual address to real address. More registers are saved in BookE-64bit.(TCR, SPRG1) Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
| * powerpc/85xx: Add P1023RDB board supportChunhe Lan2013-08-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | P1023RDB Specification: ----------------------- Memory subsystem: 512MB DDR3 (Fixed DDR on board) 64MB NOR flash 128MB NAND flash Ethernet: eTSEC1: Connected to Atheros AR8035 GETH PHY eTSEC2: Connected to Atheros AR8035 GETH PHY PCIe: Three mini-PCIe slots USB: Two USB2.0 Type A ports I2C: AT24C08 8K Board EEPROM (8 bit address) Signed-off-by: Chunhe Lan <Chunhe.Lan@freescale.com> Cc: Scott Wood <scottwood@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
| * powerpc/85xx: Add support for 85xx cpu type detectionHaijun.Zhang2013-08-23
| | | | | | | | | | | | | | | | | | | | Add this file to help detect cpu type in runtime. These macros will be more favorable for driver to apply errata and workaround to specified cpu type. Signed-off-by: Haijun Zhang <Haijun.Zhang@freescale.com> Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
| * powerpc/e500: Set -mcpu flag for 32-bit e500Scott Wood2013-08-20
| | | | | | | | | | | | | | | | | | | | | | Unlike 64-bit, we don't currently support multiplatform between e500 and non-e500, so the -mcpu is not configurable at this time. -msoft-float is specified when testing for -mcpu=8540 because otherwise some older toolchains will fail with "error: E500 and FPRs not supported". Signed-off-by: Scott Wood <scottwood@freescale.com>
| * powerpc/booke64: Use appropriate -mcpuScott Wood2013-08-20
| | | | | | | | | | | | | | | | | | | | By default use -mcpu=powerpc64 rather than -mtune=power7 Add options for e5500/e6500, with fallbacks for older compilers. Hide the POWER cpu options in booke configs. Signed-off-by: Scott Wood <scottwood@freescale.com>
| * powerpc/85xx: Remove -Wa,-me500Scott Wood2013-08-20
| | | | | | | | | | | | | | | | | | | | | | This caused lwsync to be converted to sync on 64-bit (on 32-bit lwsync is generated at runtime, and so wasn't affected). Not using lwsync caused a significant slowdown on certain workloads. Setting this flag for any e500-enabled build is also not friendly to multiplatform kernels. Signed-off-by: Scott Wood <scottwood@freescale.com>
| * powerpc: Convert some mftb/mftbu into mfsprScott Wood2013-08-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some CPUs (such as e500v1/v2) don't implement mftb and will take a trap. mfspr should work on everything that has a timebase, and is the preferred instruction according to ISA v2.06. Currently we get away with mftb on 85xx because the assembler converts it to mfspr due to -Wa,-me500. However, that flag has other effects that are undesireable for certain targets (e.g. lwsync is converted to sync), and is hostile to multiplatform kernels. Thus we would like to stop setting it for all e500-family builds. mftb/mftbu instances which are in 85xx code or common code are converted. Instances which will never run on 85xx are left alone. Signed-off-by: Scott Wood <scottwood@freescale.com>
| * powerpc/fsl-booke: Work around erratum A-006958Scott Wood2013-08-20
|/ | | | | | | | | | | | | | | | Erratum A-006598 says that 64-bit mftb is not atomic -- it's subject to a similar race condition as doing mftbu/mftbl on 32-bit. The lower half of timebase is updated before the upper half; thus, we can share the workaround for a similar bug on Cell. This workaround involves looping if the lower half of timebase is zero, thus avoiding the need for a scratch register (other than CR0). This workaround must be avoided when the timebase is frozen, such as during the timebase sync code. This deals with kernel and vdso accesses, but other userspace accesses will of course need to be fixed elsewhere. Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/wsp: Fix early debug buildBenjamin Herrenschmidt2013-08-15
| | | | | | | | When reworking udbg_16550.c I forgot to remove the old and now useless code for the CONFIG_PPC_EARLY_DEBUG_WSP case, which doesn't build as a result. I also missed a cast. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make rwlocks endian safeAnton Blanchard2013-08-14
| | | | | | | | | Our ppc64 spinlocks and rwlocks use a trick where a lock token and the paca index are placed in the lock with a single store. Since we are using two u16s they need adjusting for little endian. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Fix little endian coredumpsAnton Blanchard2013-08-14
| | | | | | | We need to set ELF_DATA correctly on LE coredumps. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pseries: Fix endian issues in H_GET_TERM_CHAR/H_PUT_TERM_CHARAnton Blanchard2013-08-14
| | | | | Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Little endian SMP IPI demuxAnton Blanchard2013-08-14
| | | | | | | Add little endian support for demuxing SMP IPIs Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Emulate instructions in little endian modeAnton Blanchard2013-08-14
| | | | | | | | | | | Alistair noticed we got a SIGILL on userspace mfpvr instructions. Remove the little endian check in the emulation code, it is probably there to protect against the old pseudo little endian implementations but doesn't make sense for real little endian. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Fix little endian lppaca, slb_shadow and dtl_entryAnton Blanchard2013-08-14
| | | | | | | | | | | The lppaca, slb_shadow and dtl_entry hypervisor structures are big endian, so we have to byte swap them in little endian builds. LE KVM hosts will also need to be fixed but for now add an #error to remind us. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Add endian annotations to lppaca, slb_shadow and dtl_entryAnton Blanchard2013-08-14
| | | | | | | | Add endian annotation to various hypervisor structures which are defined as big endian. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make NUMA device node code endian safeAlistair Popple2013-08-14
| | | | | | | | | The device tree is big endian so make sure we byteswap on little endian. We assume any pHyp calls also return big endian results in memory. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Little endian fixes for legacy_serial.cAlistair Popple2013-08-14
| | | | | Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make PCI device node device tree accesses endian safeAnton Blanchard2013-08-14
| | | | | Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make OF PCI device tree accesses endian safeAnton Blanchard2013-08-14
| | | | | Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make device tree accesses in VIO subsystem endian safeAnton Blanchard2013-08-14
| | | | | Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make device tree accesses in HVC VIO console endian safeAnton Blanchard2013-08-14
| | | | | Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make prom_init.c endian safeBenjamin Herrenschmidt2013-08-14
| | | | | | Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make device tree accesses in cache info code endian safeAnton Blanchard2013-08-14
| | | | | Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: of_parse_dma_window should take a __be32 *dma_windowAnton Blanchard2013-08-14
| | | | | | | | | | | We pass dma_window to of_parse_dma_window as a void * and then run through hoops to cast it back to a u32 array. In the process we lose endian annotation. Simplify it by just passing a __be32 * down. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Fix some endian issues in xics codeAnton Blanchard2013-08-14
| | | | | Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Add some endian annotations to time and xics codeAnton Blanchard2013-08-14
| | | | | | | Fix a couple of sparse warnings. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: More little endian fixes for setup-common.cAlistair Popple2013-08-14
| | | | | Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make logical to real cpu mapping code endian safeAnton Blanchard2013-08-14
| | | | | Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make RTAS calls endian safeAnton Blanchard2013-08-14
| | | | | | | | RTAS expects arguments in the call buffer to be big endian so we need to byteswap on little endian builds Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make cache info device tree accesses endian safeAnton Blanchard2013-08-14
| | | | | Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make RTAS device tree accesses endian safeAnton Blanchard2013-08-14
| | | | | Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: More little endian fixes for prom.cAlistair Popple2013-08-14
| | | | | Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make prom.c device tree accesses endian safeIan Munsie2013-08-14
| | | | | | | | | | On PowerPC the device tree is always big endian, but the CPU could be either, so add be32_to_cpu where appropriate and change the types of device tree data to __be32 etc to allow sparse to locate endian issues. Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Avoid link stack corruption for MMU on exceptionsMichael Neuling2013-08-14
| | | | | | | | | | | | | | | | | | | | | | | | | When we have MMU on exceptions (POWER8) and a relocatable kernel, we need to branch from the initial exception vectors at 0x0 to up high where the kernel might be located. Currently we do this using the link register. Unfortunately this corrupts the link stack and instead we should use the count register. We did this for the syscall entry path in: 6a40480 powerpc: Avoid link stack corruption in MMU on syscall entry path but I stupidly forgot to do the same for other exceptions. This patch changes the initial exception vectors to use the count register instead of the link register when we need to branch up to the relocated kernel. I have a dodgy userspace test which loops calling a function that reads the PVR (mfpvr in userspace will be emulated by the kernel via the program check exception). On POWER8 and with CONFIG_RELOCATABLE=y, I get a ~10% performance improvement with my userspace test with this patch. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make chip-id information available to userspaceVasant Hegde2013-08-14
| | | | | | | | | | | | | So far "/sys/devices/system/cpu/cpuX/topology/physical_package_id" was always default (-1) on ppc64 architecture. Now, some systems have an ibm,chip-id property in the cpu nodes in the device tree. On these systems, we now use this information to display physical_package_id. Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/eeh: powerpc/eeh: Fix undefined variableMike Qiu2013-08-14
| | | | | | | | | | | | | | | | | changes for V4: - changes the type of frozen_pe_no from %d to %llu in pr_devel() 'pe_no' hasn't been defined, it should be an typo error, it should be 'frozen_pe_no'. Also '__func__' has missed in IODA_EEH_DBG(), For safety reasons, use pr_devel() directly, instead of use IODA_EEH_DBG() Signed-off-by: Mike Qiu <qiudayu@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Revert "powerpc/e500: Update compilation flags with core specific options"Benjamin Herrenschmidt2013-08-14
| | | | | | | | | | | | This reverts commit c8db32c8669f7de05b820ee4934926405af52188. The commit breaks the build of all my 64-bit embedded configs. It looks like gcc-4.7.3 doesn't know about e5500. Additionally it incorrectly does -mcpu=e5500 on a config that has both e5500 and A2 support enabled. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> ---
* powerpc: Use ibm, chip-id property to compute cpu_core_mask if availablePaul Mackerras2013-08-14
| | | | | | | | | | | Some systems have an ibm,chip-id property in the cpu nodes in the device tree. On these systems, we now use that to compute the cpu_core_mask (i.e. the set of core siblings) rather than looking at cache properties. Signed-off-by: Paul Mackerras <paulus@samba.org> Tested-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Pull out cpu_core_mask updates into a separate functionPaul Mackerras2013-08-14
| | | | | | | | | This factors out the details of updating cpu_core_mask into a separate function, to make it easier to change how the mask is calculated later. This makes no functional change. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Fix denormalized exception handlerPaul Mackerras2013-08-14
| | | | | | | | | | | | | | | | | | | The denormalized exception handler (denorm_exception_hv) has a couple of bugs. If the CONFIG_PPC_DENORMALISATION option is not selected, or the HSRR1_DENORM bit is not set in HSRR1, we don't test whether the interrupt occurred within a KVM guest. On the other hand, if the HSRR1_DENORM bit is set and CONFIG_PPC_DENORMALISATION is enabled, we corrupt the CFAR and PPR. To correct these problems, this replaces the open-coded version of EXCEPTION_PROLOG_1 that is there currently, and that is missing the saving of PPR and CFAR values to the PACA, with an instance of EXCEPTION_PROLOG_1. This adds an explicit KVMTEST after testing whether the exception is one we can handle, and adds code to restore the CFAR on exit. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Ignore zImage.epaprMark Brown2013-08-14
| | | | | | | This is another file we can generate so add it to the list. Signed-off-by: Mark Brown <broonie@linaro.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/math-emu: Fix load/store indexed emulationJames Yang2013-08-14
| | | | | | | | | | | | | Load/store indexed instructions where the index register RA=R0, such as "lfdx f1,0,r3", are not illegal. Load/store indexed with update instructions where the index register RA=R0, such as "lfdux f1,0,r3", are invalid, and, to be consistent with existing math-emu behavior for other invalid instruction forms, will signal as illegal. Signed-off-by: James Yang <James.Yang@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Remove the empty giveup_fpu() function on 32bit kernelKevin Hao2013-08-14
| | | | | | | | | Instead of implementing an empty giveup_fpu() function for each 32bit processor type, replace them with an unique empty inline function. Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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