- 01 9月, 2017 1 次提交
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由 Paul Mackerras 提交于
The analyse_instr function currently doesn't just work out what an instruction does, it also executes those instructions whose effect is only to update CPU registers that are stored in struct pt_regs. This is undesirable because optprobes uses analyse_instr to work out if an instruction could be successfully emulated in future. This changes analyse_instr so it doesn't modify *regs; instead it stores information in the instruction_op structure to indicate what registers (GPRs, CR, XER, LR) would be set and what value they would be set to. A companion function called emulate_update_regs() can then use that information to update a pt_regs struct appropriately. As a minor cleanup, this replaces inline asm using the cntlzw and cntlzd instructions with calls to __builtin_clz() and __builtin_clzl(). Signed-off-by: NPaul Mackerras <paulus@ozlabs.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 31 8月, 2017 39 次提交
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由 Paul Mackerras 提交于
The instruction code for xxlor that commit 0016a4cf ("powerpc: Emulate most Book I instructions in emulate_step()", 2010-06-15) added is actually the code for xxlnor. It is used in get_vsr() and put_vsr() and the effect of the error is that if emulate_step is used to emulate a VSX load or store from any register other than vsr0, the bitwise complement of the correct value will be loaded or stored. This corrects the error. Fixes: 0016a4cf ("powerpc: Emulate most Book I instructions in emulate_step()") Signed-off-by: NPaul Mackerras <paulus@ozlabs.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
Anton noticed that if we fault part way through emulating an unaligned instruction, we don't update the DAR to reflect that. The DAR value is eventually reported back to userspace as the address in the SEGV signal, and if userspace is using that value to demand fault then it can be confused by us not setting the value correctly. This patch is ugly as hell, but is intended to be the minimal fix and back ports easily. Cc: stable@vger.kernel.org Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au> Reviewed-by: NPaul Mackerras <paulus@ozlabs.org>
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由 John Allen 提交于
Check if an LMB is assigned before attempting to call dlpar_acquire_drc in order to avoid any unnecessary rtas calls. This substantially reduces the running time of memory hot add on lpars with large amounts of memory. [mpe: We need to explicitly set rc to 0 in the success case, otherwise the compiler might think we use rc without initialising it.] Fixes: c21f515c ("powerpc/pseries: Make the acquire/release of the drc for memory a seperate step") Cc: stable@vger.kernel.org # v4.11+ Signed-off-by: NJohn Allen <jallen@linux.vnet.ibm.com> Reviewed-by: NNathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Arvind Yadav 提交于
struct platform_suspend_ops are not supposed to change at runtime. Functions suspend_set_ops working with const platform_suspend_ops. So mark the non-const structs as const. Signed-off-by: NArvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Oliver O'Halloran 提交于
In previous generations of Power processors each core had a private L2 cache. The Power 9 processor has a slightly different design where the L2 cache is shared among pairs of cores rather than being completely private. Making the scheduler aware of this cache sharing allows the scheduler to make better migration decisions. For example, if two CPU heavy tasks share a core then one task can be migrated to the paired core to improve throughput. Under the existing three level topology the task could be migrated to any core on the same chip, while with the new topology it would be preferentially migrated to the paired core so it remains cache-hot. Signed-off-by: NOliver O'Halloran <oohall@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Oliver O'Halloran 提交于
We want to add an extra level to the CPU scheduler topology to account for cores which share a cache. To do this we need to build a cpumask for each CPU that indicates which CPUs share this cache to use as an input to the scheduler. Signed-off-by: NOliver O'Halloran <oohall@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Oliver O'Halloran 提交于
The CPU scheduler topology is constructed from a number of per-cpu cpumasks which describe which sets of logical CPUs are related in some fashion. Current code that handles constructing these masks when CPUs are hot(un)plugged can be simplified a bit by exploiting the fact that the scheduler requires higher levels of the toplogy (e.g package level groupings) to be supersets of the lower levels (e.g. threas in a core). This patch reworks the cpumask construction to be simpler and easier to extend with extra topology levels. Signed-off-by: NOliver O'Halloran <oohall@gmail.com> [mpe: Fix CONFIG_HOTPLUG_CPU=n build] Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Oliver O'Halloran 提交于
When building the CPU scheduler topology the kernel uses the ibm,chipid property from the devicetree to group logical CPUs. Currently the DT search for this property is open-coded in smp.c and this functionality is a duplication of what's in cpu_to_chip_id() already. This patch removes the existing search in favor of that. It's worth mentioning that the semantics of the search are different in cpu_to_chip_id(). When there is no ibm,chipid in the CPUs node it will also search /cpus and / for the property, but this should not effect the output topology. Signed-off-by: NOliver O'Halloran <oohall@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Hannes Reinecke 提交于
mpsc.c and mpc52xx-psc.c are platform-specific serial drivers, and should be compiled for the respective platforms only. Signed-off-by: NHannes Reinecke <hare@suse.com> Reviewed-by: NTorsten Duwe <duwe@suse.de> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Tobin C. Harding 提交于
.llong is an undocumented PPC specific directive. The generic equivalent is .quad, but even better (because it's self describing) is .8byte. Convert all .llong directives to .8byte. Signed-off-by: NTobin C. Harding <me@tobin.cc> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Balbir Singh 提交于
Enable 64K page size and THP. I use ppc64le_defconfig when I need a single config across guest and host, but having 4K page size as default is not what I expect. I could move these over to server.config and merge if ppc64_defconfig is meant for systems that use 4k pages by default. Signed-off-by: NBalbir Singh <bsingharora@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Balbir Singh 提交于
Most (all?) distros turn these on, so it makes sense to enable them for testing coverage, and they're also useful for developers. Signed-off-by: NBalbir Singh <bsingharora@gmail.com> Acked-by: NNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> [mpe: Reword change log] Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Balbir Singh 提交于
Add support for printing the PIDR/TIDR for ISA 300 and PSSCR and PTCR in ISA 3.0 hypervisor mode. SPRN_PSSCR_PR is the privileged mode access and is used when we are not in hypervisor mode. Signed-off-by: NBalbir Singh <bsingharora@gmail.com> [mpe: Split out of larger patch] Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Balbir Singh 提交于
This patch adds support to xmon for dumping the AMR, UAMOR, AMOR and IAMR SPRs based on their supported ISA revisions. Signed-off-by: NBalbir Singh <bsingharora@gmail.com> [mpe: Split out of larger patch] Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Balbir Singh 提交于
ISA 3.0 defines hypervisor decrementer to be 64 bits in length. This patch extends the print format for to be 64 bits. Signed-off-by: NBalbir Singh <bsingharora@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Masahiro Yamada 提交于
Remove unneeded variables and assignments. Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
When we map memory at boot we print out the ranges of real addresses that we mapped and the page size that was used. Currently it's a bit ugly: Mapped range 0x0 - 0x2000000000 with 0x40000000 Mapped range 0x200000000000 - 0x202000000000 with 0x40000000 Pad the addresses so they line up, and print the page size using actual units, eg: Mapped 0x0000000000000000-0x0000000001200000 with 64.0 KiB pages Mapped 0x0000000001200000-0x0000000040000000 with 2.00 MiB pages Mapped 0x0000000040000000-0x0000000100000000 with 1.00 GiB pages Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Michael Ellerman 提交于
Make the printks look a bit nicer by adding a prefix. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Bryant G. Ly 提交于
For a PCI device it's pci_dn can be retrieved from pdev->dev.archdata.firmware_data, PCI_DN(devnode), or parent's list. Thus, we should just use the existing function pci_get_pdn_by_devfn to get the pci_dn. Signed-off-by: NBryant G. Ly <bryantly@linux.vnet.ibm.com> Reviewed-by: NSam Bobroff <sam.bobroff@au1.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Sukadev Bhattiprolu 提交于
Define interfaces (wrappers) to the 'copy' and 'paste' instructions (which are new in PowerISA 3.0). These are intended to be used to by NX driver(s) to submit Coprocessor Request Blocks (CRBs) to the NX hardware engines. Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Sukadev Bhattiprolu 提交于
Define an interface to open a VAS send window. This interface is intended to be used the Nest Accelerator (NX) driver(s) to open a send window and use it to submit compression/encryption requests to a VAS receive window. The receive window, identified by the [vasid, cop] parameters, must already be open in VAS (i.e connected to an NX engine). Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Sukadev Bhattiprolu 提交于
Define the vas_win_close() interface which should be used to close a send or receive windows. While the hardware configurations required to open send and receive windows differ, the configuration to close a window is the same for both. So we use a single interface to close the window. Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Sukadev Bhattiprolu 提交于
Define the vas_rx_win_open() interface. This interface is intended to be used by the Nest Accelerator (NX) driver(s) to setup receive windows for one or more NX engines (which implement compression & encryption algorithms in the hardware). Follow-on patches will provide an interface to close the window and to open a send window that kernel subsystems can use to access the NX engines. The interface to open a receive window is expected to be invoked for each instance of VAS in the system. Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Sukadev Bhattiprolu 提交于
Define helpers to allocate/free VAS window objects. These will be used in follow-on patches when opening/closing windows. Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Sukadev Bhattiprolu 提交于
Define helpers to initialize window context registers of the VAS hardware. These will be used in follow-on patches when opening/closing VAS windows. Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Sukadev Bhattiprolu 提交于
Define some helper functions to access the MMIO regions. We use these in follow-on patches to read/write VAS hardware registers. They are also used to later issue 'paste' instructions to submit requests to the NX hardware engines. Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Sukadev Bhattiprolu 提交于
Implement vas_init() and vas_exit() functions for a new VAS module. This VAS module is essentially a library for other device drivers and kernel users of the NX coprocessors like NX-842 and NX-GZIP. In the future this will be extended to add support for user space to access the NX coprocessors. VAS is currently only supported with 64K page size. Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Sukadev Bhattiprolu 提交于
Move the GET_FIELD and SET_FIELD macros to vas.h as VAS and other users of VAS, including NX-842 can use those macros. There is a lot of related code between the VAS/NX kernel drivers and skiboot. For consistency, switch the order of parameters in SET_FIELD to match the order in skiboot. Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Reviewed-by: NDan Streetman <ddstreet@ieee.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Sukadev Bhattiprolu 提交于
Define macros for the VAS hardware registers and bit-fields as well as couple of data structures needed by the VAS driver. Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> [mpe: Fixup include guard to use _ASM_POWERPC_VAS_H] Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Balbir Singh 提交于
Convert 0.16x to 0.16lx. Otherwise we lose the top 8 nibbles and effectively print only the last 32 bits. Fixes: 1846193b ("powerpc/xmon: Dump ISA 2.06 SPRs") Signed-off-by: NBalbir Singh <bsingharora@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Alexey Kardashevskiy 提交于
The check_req() helper uses pci_get_pdn() to get an OF node pointer. pci_get_pdn() returns a pci_dn pointer which either: 1) from the OF node returned by pci_device_to_OF_node(); 2) from the parent child_list where entries don't have OF node pointers. Since check_req() does not care about 2), it can call pci_device_to_OF_node() directly, hence the change. The find_pe_dn() helper uses embedded pci_dn to get an OF node which is also stored in edev->pdev so let's take a shortcut and call pci_device_to_OF_node() directly. With these 2 changes, we can finally get rid of the OF node back pointer. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Alexey Kardashevskiy 提交于
The pci_dn struct caches a OF device node pointer in order to access the "ibm,loc-code" property when EEH is recovering. However, when this happens in eeh_dev_check_failure(), we also have a pci_dev pointer which should have a valid pointer to the device node when pci_dn has one (both pointers are not NULL for physical functions and are NULL for virtual functions). This changes pci_remove_device_node_info() to look for a parent of the node being removed, just like pci_add_device_node_info() does when it references the parent node. This is the first step to get rid of pci_dn::node. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Alexey Kardashevskiy 提交于
The eeh_dev struct hold a config space address of an associated node and the very same address is also stored in the pci_dn struct which is always present during the eeh_dev lifetime. This uses bus:devfn directly from pci_dn instead of cached and packed config_addr. Since config_addr is made from device's bus:dev.fn, there is no point in keeping it in the debugfs either so remove that too. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Alexey Kardashevskiy 提交于
The eeh_dev struct already holds a pointer to pci_dn which it does not exist without and pci_dn itself holds the very same pointer so just use it. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Alexey Kardashevskiy 提交于
arch/powerpc/kernel/eeh_dev.c:57 is the only legit place where edev is allocated; other 2 places allocate it on stack and in the heap for a very short period of time to use eeh_pe_get() as takes edev. This changes eeh_pe_get() to receive required parameters explicitly. This removes unnecessary temporary allocation of edev. This uses the "pe_no" name instead of the "pe_config_addr" name as it actually is a PE number and not a config space address as it seemed. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Acked-by: NRussell Currey <ruscur@russell.cc> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Alexey Kardashevskiy 提交于
pdev is always NULL, remove it. To make checkpatch.pl happy, this also removes the "out of memory" message. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: NAndrew Donnellan <andrew.donnellan@au1.ibm.com> Acked-by: NRussell Currey <ruscur@russell.cc> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Arvind Yadav 提交于
clk_div_tables are not supposed to change at runtime. mpc512x_clk_divtable function working with const clk_div_table. So mark the non-const structs as const. Signed-off-by: NArvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Dan Carpenter 提交于
My static checker complains that 0x00001800 >> 13 is zero. Looking at the context, it seems like a copy and paste bug from the line below and probably 0x3 << 13 or 0x00006000 was intended. Fixes: 2af59f7d ("[POWERPC] 4xx: Add 405GPr and 405EP support in boot wrapper") Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Dan Carpenter 提交于
There is a cut and paste error here so we use sizeof(struct mpc83xx_pmc) to remap the memory for "clock_regs". That sizeof() is 20 bytes and we only need to remap 12 bytes. It presumably doesn't affect run time too much... I changed them to both use sizeof(*variable_name) because that's the preferred kernel style these days. Fixes: d49747bd ("powerpc/mpc83xx: Power Management support") Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> [mpe: It will map at least one page anyway, but still a good cleanup] Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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