aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc/kernel/module.c (unfollow)
AgeCommit message (Collapse)AuthorFilesLines
2017-08-31powerpc/configs: Enable THP and 64K for ppc64(le)_defconfigBalbir Singh1-0/+2
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: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31MAINTAINERS: Add drivers/watchdog/wdrtas.c to powerpc sectionMurilo Opsfelder Araujo1-0/+1
drivers/watchdog/wdrtas.c is of interest of linuxppc maintainers. Signed-off-by: Murilo Opsfelder Araujo <mopsfelder@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/configs: Enable function trace by defaultBalbir Singh3-0/+10
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: Balbir Singh <bsingharora@gmail.com> Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> [mpe: Reword change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/xmon: Add ISA v3.0 SPRs to SPR dumpBalbir Singh2-0/+24
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: Balbir Singh <bsingharora@gmail.com> [mpe: Split out of larger patch] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/xmon: Add AMR, UAMOR, AMOR, IAMR to SPR dumpBalbir Singh1-4/+7
This patch adds support to xmon for dumping the AMR, UAMOR, AMOR and IAMR SPRs based on their supported ISA revisions. Signed-off-by: Balbir Singh <bsingharora@gmail.com> [mpe: Split out of larger patch] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/xmon: Dump all 64 bits of HDECBalbir Singh1-1/+1
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: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc: Squash lines for simple wrapper functionsMasahiro Yamada2-47/+17
Remove unneeded variables and assignments. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/mm/radix: Prettify mapped memory range print outMichael Ellerman1-1/+6
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: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/mm/radix: Add pr_fmt() to pgtable-radix.cMichael Ellerman1-0/+4
Make the printks look a bit nicer by adding a prefix. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/kernel: Change retrieval of pci_dnBryant G. Ly1-29/+4
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: Bryant G. Ly <bryantly@linux.vnet.ibm.com> Reviewed-by: Sam Bobroff <sam.bobroff@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/mm/cxl: Add barrier when setting mm cpumaskAneesh Kumar K.V1-2/+12
We need to add memory barrier so that the page table walk doesn't happen before the cpumask is set and made visible to the other cpus. We need to use a sync here instead of lwsync because lwsync is not sufficient for store/load ordering. We also need to add an if (mm) check so that we do the right thing when called with a kernel context. For kernel context, we have mm = NULL. W.r.t kernel address we can skip setting the mm cpumask. Fixes: 0f4bc0932e ("powerpc/mm/cxl: Add the fault handling cpu to mm cpumask") Cc: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv/vas: Define copy/paste interfacesSukadev Bhattiprolu6-2/+124
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: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv/vas: Define vas_tx_win_open()Sukadev Bhattiprolu2-3/+195
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: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv/vas: Define vas_win_close() interfaceSukadev Bhattiprolu2-5/+103
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: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv/vas: Define vas_rx_win_open() interfaceSukadev Bhattiprolu3-1/+341
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: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv/vas: Define helpers to alloc/free windowsSukadev Bhattiprolu1-0/+73
Define helpers to allocate/free VAS window objects. These will be used in follow-on patches when opening/closing windows. Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv/vas: Define helpers to init window contextSukadev Bhattiprolu2-0/+354
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: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv/vas: Define helpers to access MMIO regionsSukadev Bhattiprolu1-0/+174
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: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv/vas: Define vas_init() and vas_exit()Sukadev Bhattiprolu7-0/+217
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: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv: Move GET_FIELD/SET_FIELD to vas.hSukadev Bhattiprolu3-8/+12
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: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Reviewed-by: Dan Streetman <ddstreet@ieee.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv/vas: Define macros, register fields and structuresSukadev Bhattiprolu2-0/+427
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: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> [mpe: Fixup include guard to use _ASM_POWERPC_VAS_H] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/xmon: Fix display of SPRsBalbir Singh1-16/+16
Convert 0.16x to 0.16lx. Otherwise we lose the top 8 nibbles and effectively print only the last 32 bits. Fixes: 1846193b178d ("powerpc/xmon: Dump ISA 2.06 SPRs") Signed-off-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/pci: Remove OF node back pointer from pci_dnAlexey Kardashevskiy3-11/+2
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: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/eeh: Reduce use of pci_dn::nodeAlexey Kardashevskiy2-6/+10
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: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/eeh: Remove unnecessary config_addr from eeh_devAlexey Kardashevskiy5-31/+26
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: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/eeh: Remove unnecessary pointer to phb from eeh_devAlexey Kardashevskiy7-23/+20
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: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/eeh: Reduce to one the number of places where edev is allocatedAlexey Kardashevskiy3-25/+25
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: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Acked-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/pci: Remove unused parameter from add_one_dev_pci_data()Alexey Kardashevskiy1-12/+2
pdev is always NULL, remove it. To make checkpatch.pl happy, this also removes the "out of memory" message. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Acked-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/512x: Constify clk_div_tablesArvind Yadav1-2/+2
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: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/44x: Fix mask and shift to zero bugDan Carpenter1-1/+1
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: 2af59f7d5c3e ("[POWERPC] 4xx: Add 405GPr and 405EP support in boot wrapper") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/83xx: Use sizeof correct type when ioremappingDan Carpenter1-2/+2
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: d49747bdfb2d ("powerpc/mpc83xx: Power Management support") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> [mpe: It will map at least one page anyway, but still a good cleanup] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc: Machine check interrupt is a non-maskable interruptNicholas Piggin1-3/+6
Use nmi_enter similarly to system reset interrupts. This uses NMI printk NMI buffers and turns off various debugging facilities that helps avoid tripping on ourselves or other CPUs. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv: Use kernel crash path for machine checksNicholas Piggin5-7/+59
There are quite a few machine check exceptions that can be caused by kernel bugs. To make debugging easier, use the kernel crash path in cases of synchronous machine checks that occur in kernel mode, if that would not result in the machine going straight to panic or crash dump. There is a downside here that die()ing the process in kernel mode can still leave the system unstable. panic_on_oops will always force the system to fail-stop, so systems where that behaviour is important will still do the right thing. As a test, when triggering an i-side 0111b error (ifetch from foreign address) in kernel mode process context on POWER9, the kernel currently dies quickly like this: Severe Machine check interrupt [Not recovered] NIP [ffff000000000000]: 0xffff000000000000 Initiator: CPU Error type: Real address [Instruction fetch (foreign)] [ 127.426651616,0] OPAL: Reboot requested due to Platform error. Effective[ 127.426693712,3] OPAL: Reboot requested due to Platform error. address: ffff000000000000 opal: Reboot type 1 not supported Kernel panic - not syncing: PowerNV Unrecovered Machine Check CPU: 56 PID: 4425 Comm: syscall Tainted: G M 4.12.0-rc1-13857-ga4700a261072-dirty #35 Call Trace: [ 128.017988928,4] IPMI: BUG: Dropping ESEL on the floor due to buggy/mising code in OPAL for this BMC Rebooting in 10 seconds.. Trying to free IRQ 496 from IRQ context! After this patch, the process is killed and the kernel continues with this message, which gives enough information to identify the offending branch (i.e., with CFAR): Severe Machine check interrupt [Not recovered] NIP [ffff000000000000]: 0xffff000000000000 Initiator: CPU Error type: Real address [Instruction fetch (foreign)] Effective address: ffff000000000000 Oops: Machine check, sig: 7 [#1] SMP NR_CPUS=2048 NUMA PowerNV Modules linked in: iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 ... CPU: 22 PID: 4436 Comm: syscall Tainted: G M 4.12.0-rc1-13857-ga4700a261072-dirty #36 task: c000000932300000 task.stack: c000000932380000 NIP: ffff000000000000 LR: 00000000217706a4 CTR: ffff000000000000 REGS: c00000000fc8fd80 TRAP: 0200 Tainted: G M (4.12.0-rc1-13857-ga4700a261072-dirty) MSR: 90000000001c1003 <SF,HV,ME,RI,LE> CR: 24000484 XER: 20000000 CFAR: c000000000004c80 DAR: 0000000021770a90 DSISR: 0a000000 SOFTE: 1 GPR00: 0000000000001ebe 00007fffce4818b0 0000000021797f00 0000000000000000 GPR04: 00007fff8007ac24 0000000044000484 0000000000004000 00007fff801405e8 GPR08: 900000000280f033 0000000024000484 0000000000000000 0000000000000030 GPR12: 9000000000001003 00007fff801bc370 0000000000000000 0000000000000000 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR24: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR28: 00007fff801b0000 0000000000000000 00000000217707a0 00007fffce481918 NIP [ffff000000000000] 0xffff000000000000 LR [00000000217706a4] 0x217706a4 Call Trace: Instruction dump: XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv: Flush console before platform error rebootNicholas Piggin4-58/+57
Unrecovered MCE and HMI errors are sent through a special restart OPAL call to log the platform error. The downside is that they don't go through normal Linux crash paths, so they don't give much information to the Linux console. Change this by providing a special crash function which does some of the console flushing from the panic() path before calling firmware to reboot. The downside of this is a little more code to execute before reaching the firmware reboot. However in practice, it's critical to get the Linux console messages output in order to debug a problem. So this is a desirable tradeoff. Note on the implementation: It is difficult to plumb a custom reboot handler into the panic path, because panic does a little bit too much work. For example, it will try to delay with the timebase, but that may be corrupted in some cases resulting in a hang without reaching the platform reboot. Another problem is that panic can invoke the crash dump code which is not what we want in the case of a hardware platform error. Long-term the best solution will be to rework the panic path so it can be suitable for this kind of panic, but for now we just duplicate a bit of the code. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc: Do not send system reset request through the oops pathNicholas Piggin1-16/+31
A system reset is a request to crash / debug the system rather than necessarily caused by encountering a BUG. So there is no need to serialize all CPUs behind the die lock, adding taints to all subsequent traces beyond the first, breaking console locks, etc. The system reset is NMI context which has its own printk buffers to prevent output being interleaved. Then it's better to have all secondaries print out their debug as quickly as possible and the primary will flush out all printk buffers during panic(). So remove the 0x100 path from die, and move it into system_reset. Name the crash/dump reasons "System Reset". This gives "not tained" traces when crashing an untainted kernel. It also gives the panic reason as "System Reset" as opposed to "Fatal exception in interrupt" (or "die oops" for fadump). Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/pseries/le: Work around a firmware quirkNicholas Piggin1-0/+15
Some PowerVM firmware when delivering a system reset interrupt to a little endian OS will mess up SRR registers. They are byteswapped, and SRR1 is incorrect. An example from a crash: NIP: 14dd0900000000c0 MSR: 1000000200000080 It's possible to detect this pattern in SRR1 (that would never happen in normal operation), and at least fix the NIP. After this patch, the same interrupt reports NIP properly: NIP [c00000000009dd14] plpar_hcall_norets+0x1c/0x28 Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc: Do not call ppc_md.panic in fadump panic notifierNicholas Piggin6-45/+22
If fadump is not registered, and no other crash or debug handlers are registered, the powerpc panic handler stops the guest before the generic panic code can push out debug information to the console. Currently, system reset injection causes the guest to silently stop. Stop calling ppc_md.panic in the panic notifier. crash_fadump already does rtas_os_term() to terminate the guest if fadump is registered. Remove ppc_md.panic. Move fadump panic notifier into fadump code. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/64: Fix watchdog configuration regressionsNicholas Piggin3-9/+29
This fixes a couple more bits of fallout from the new hard lockup watchdog patch. It restores the required hw_nmi_get_sample_period() function for the perf watchdog, and removes some function declarations on 64e that are only defined for 64s. This fixes the 64e build when the hardlockup detector is enabled. It restores the default behaviour of disabling the perf watchdog, and also fixes disabling the 64s watchdog when running as a guest. Fixes: 2104180a53 ("powerpc/64s: implement arch-specific hardlockup watchdog") Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/64s/radix: Do not allocate SLB shadow structuresNicholas Piggin1-2/+11
These are unused in radix mode. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/64s/radix: Remove bolted-SLB address limit for per-cpu stacksNicholas Piggin1-3/+8
Radix MMU does not take SLB or TLB interrupts when accessing kernel linear address. Remove this restriction for radix mode. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-31powerpc/powernv: powernv platform is not constrained by RMANicholas Piggin1-5/+2
Remove incorrect comment about real mode address restrictions on powernv (bare metal), and unnecessary clamping to ppc64_rma_size. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-29powerpc/64s: idle POWER9 can execute stop in virtual modeNicholas Piggin1-0/+9
The hardware can execute stop in any context, and KVM does not require real mode because siblings do not share MMU state. This saves a switch to real-mode when going idle. Acked-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-29powerpc/64s: Drop no longer used IDLE_STATE_ENTER_SEQNicholas Piggin1-4/+1
There are no longer any callers of IDLE_STATE_ENTER_SEQ, all callers use IDLE_STATE_ENTER_SEQ_NORET. So drop the former. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Split out of larger patch, write change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-29powerpc/64s: POWER9 can execute stop without a sync sequenceNicholas Piggin1-3/+4
We don't need to use IDLE_STATE_ENTER_SEQ_NORET on Power9. Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Split out of larger patch] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-29powerpc/64s: Move IDLE_STATE_ENTER_SEQ[_NORET] into idle_book3s.SNicholas Piggin2-16/+17
This macro is only used in idle_book3s.S, move it in there and add a more descriptive comment. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Split out of larger patch and write change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-29KVM: PPC: Book3S HV: POWER9 does not require secondary thread managementNicholas Piggin4-12/+48
POWER9 CPUs have independent MMU contexts per thread, so KVM does not need to quiesce secondary threads, so the hwthread_req/hwthread_state protocol does not have to be used. So patch it away on POWER9, and patch away the branch from the Linux idle wakeup to kvm_start_guest that is never used. Add a warning and error out of kvmppc_grab_hwthread in case it is ever called on POWER9. This avoids a hwsync in the idle wakeup path on POWER9. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Acked-by: Paul Mackerras <paulus@ozlabs.org> [mpe: Use WARN(...) instead of WARN_ON()/pr_err(...)] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-28powerpc/configs/6xx: Drop removed CONFIG_USB_LEDMichael Ellerman1-1/+0
In commit a335aaf3125c ("usb: misc: remove outdated USB LED driver") CONFIG_USB_LED was removed, so drop it from our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-28powerpc/configs/6xx: Drop no longer selectable CONFIG_BT_HCIUART_LLMichael Ellerman1-1/+0
Since commit 76c4969fecb1 ("Bluetooth: hci_uart: fix kconfig dependency") we can no longer select CONFIG_BT_HCIUART_LL. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-28powerpc/configs/c2k: Switch CONFIG_GEN_RTC from =m to =yMichael Ellerman1-1/+1
In commit 835ea93e9d26 ("char/genrtc: remove powerpc support"), CONFIG_GEN_RTC switch from tristate to bool, update the defconfig to match. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-28powerpc/configs/6xx: Switch CONFIG_USB_EHCI_FSL to =mMichael Ellerman1-1/+1
In commit ca07e1c1e4a6 ("drivers:usb:fsl:Make fsl ehci drv an independent driver module"), CONFIG_USB_EHCI_FSL was switched from built-in to modular. Update the defconfig. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.