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Author SHA1 Message Date
Benjamin Herrenschmidt
9728a7c8ab powerpc/icp-opal: Fix missing KVM case and harden replay 
The icp-opal call is missing the code from icp-native to recover
interrupts snatched by KVM. Without that, when running KVM, we can
get into a situation where an interrupt is lost and the CPU stuck
with an elevated CPPR.

Also harden replay by always checking the return from opal_int_eoi().

Fixes: d74361881f ("powerpc/xics: Add ICP OPAL backend")
Cc: stable@vger.kernel.org # v4.8+
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
 2017-01-17 11:50:03 +11:00
Linus Torvalds
07021b4359 powerpc updates for 4.9 
Highlights:
  - Major rework of Book3S 64-bit exception vectors (Nicholas Piggin)
    - Use gas sections for arranging exception vectors et. al.
  - Large set of TM cleanups and selftests (Cyril Bur)
  - Enable transactional memory (TM) lazily for userspace (Cyril Bur)
  - Support for XZ compression in the zImage wrapper (Oliver O'Halloran)
  - Add support for bpf constant blinding (Naveen N. Rao)
  - Beginnings of upstream support for PA Semi Nemo motherboards (Darren Stevens)
 
 Fixes:
  - Ensure .mem(init|exit).text are within _stext/_etext (Michael Ellerman)
  - xmon: Don't use ld on 32-bit (Michael Ellerman)
  - vdso64: Use double word compare on pointers (Anton Blanchard)
  - powerpc/nvram: Fix an incorrect partition merge (Pan Xinhui)
  - powerpc: Fix usage of _PAGE_RO in hugepage (Christophe Leroy)
  - powerpc/mm: Update FORCE_MAX_ZONEORDER range to allow hugetlb w/4K (Aneesh Kumar K.V)
  - Fix memory leak in queue_hotplug_event() error path (Andrew Donnellan)
  - Replay hypervisor maintenance interrupt first (Nicholas Piggin)
 
 Cleanups & features:
  - Sparse fixes/cleanups (Daniel Axtens)
  - Preserve CFAR value on SLB miss caused by access to bogus address (Paul Mackerras)
  - Radix MMU fixups for POWER9 (Aneesh Kumar K.V)
  - Support for setting used_(vsr|vr|spe) in sigreturn path (for CRIU) (Simon Guo)
  - Optimise syscall entry for virtual, relocatable case (Nicholas Piggin)
  - Optimise MSR handling in exception handling (Nicholas Piggin)
  - Support for kexec with Radix MMU (Benjamin Herrenschmidt)
  - powernv EEH fixes (Russell Currey)
  - Suprise PCI hotplug support for powernv (Gavin Shan)
  - Endian/sparse fixes for powernv PCI (Gavin Shan)
  - Defconfig updates (Anton Blanchard)
  - Various performance optimisations (Anton Blanchard)
    - Align hot loops of memset() and backwards_memcpy()
    - During context switch, check before setting mm_cpumask
    - Remove static branch prediction in atomic{, 64}_add_unless
    - Only disable HAVE_EFFICIENT_UNALIGNED_ACCESS on POWER7 little endian
    - Set default CPU type to POWER8 for little endian builds
 
  - KVM: PPC: Book3S HV: Migrate pinned pages out of CMA (Balbir Singh)
  - cxl: Flush PSL cache before resetting the adapter (Frederic Barrat)
  - cxl: replace loop with for_each_child_of_node(), remove unneeded of_node_put() (Andrew Donnellan)
  - Fix HV facility unavailable to use correct handler (Nicholas Piggin)
  - Remove unnecessary syscall trampoline (Nicholas Piggin)
  - fadump: Fix build break when CONFIG_PROC_VMCORE=n (Michael Ellerman)
  - Quieten EEH message when no adapters are found (Anton Blanchard)
  - powernv: Add PHB register dump debugfs handle (Russell Currey)
  - Use kprobe blacklist for exception handlers & asm functions (Nicholas Piggin)
  - Document the syscall ABI (Nicholas Piggin)
  - MAINTAINERS: Update cxl maintainers (Michael Neuling)
  - powerpc: Remove all usages of NO_IRQ (Michael Ellerman)
 
 Minor cleanups:
  - Andrew Donnellan, Christophe Leroy, Colin Ian King, Cyril Bur, Frederic Barrat,
    Pan Xinhui, PrasannaKumar Muralidharan, Rui Teng, Simon Guo.
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Merge tag 'powerpc-4.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
 "Highlights:
   - Major rework of Book3S 64-bit exception vectors (Nicholas Piggin)
   - Use gas sections for arranging exception vectors et. al.
   - Large set of TM cleanups and selftests (Cyril Bur)
   - Enable transactional memory (TM) lazily for userspace (Cyril Bur)
   - Support for XZ compression in the zImage wrapper (Oliver
     O'Halloran)
   - Add support for bpf constant blinding (Naveen N. Rao)
   - Beginnings of upstream support for PA Semi Nemo motherboards
     (Darren Stevens)

  Fixes:
   - Ensure .mem(init|exit).text are within _stext/_etext (Michael
     Ellerman)
   - xmon: Don't use ld on 32-bit (Michael Ellerman)
   - vdso64: Use double word compare on pointers (Anton Blanchard)
   - powerpc/nvram: Fix an incorrect partition merge (Pan Xinhui)
   - powerpc: Fix usage of _PAGE_RO in hugepage (Christophe Leroy)
   - powerpc/mm: Update FORCE_MAX_ZONEORDER range to allow hugetlb w/4K
     (Aneesh Kumar K.V)
   - Fix memory leak in queue_hotplug_event() error path (Andrew
     Donnellan)
   - Replay hypervisor maintenance interrupt first (Nicholas Piggin)

  Various performance optimisations (Anton Blanchard):
   - Align hot loops of memset() and backwards_memcpy()
   - During context switch, check before setting mm_cpumask
   - Remove static branch prediction in atomic{, 64}_add_unless
   - Only disable HAVE_EFFICIENT_UNALIGNED_ACCESS on POWER7 little
     endian
   - Set default CPU type to POWER8 for little endian builds

  Cleanups & features:
   - Sparse fixes/cleanups (Daniel Axtens)
   - Preserve CFAR value on SLB miss caused by access to bogus address
     (Paul Mackerras)
   - Radix MMU fixups for POWER9 (Aneesh Kumar K.V)
   - Support for setting used_(vsr|vr|spe) in sigreturn path (for CRIU)
     (Simon Guo)
   - Optimise syscall entry for virtual, relocatable case (Nicholas
     Piggin)
   - Optimise MSR handling in exception handling (Nicholas Piggin)
   - Support for kexec with Radix MMU (Benjamin Herrenschmidt)
   - powernv EEH fixes (Russell Currey)
   - Suprise PCI hotplug support for powernv (Gavin Shan)
   - Endian/sparse fixes for powernv PCI (Gavin Shan)
   - Defconfig updates (Anton Blanchard)
   - KVM: PPC: Book3S HV: Migrate pinned pages out of CMA (Balbir Singh)
   - cxl: Flush PSL cache before resetting the adapter (Frederic Barrat)
   - cxl: replace loop with for_each_child_of_node(), remove unneeded
     of_node_put() (Andrew Donnellan)
   - Fix HV facility unavailable to use correct handler (Nicholas
     Piggin)
   - Remove unnecessary syscall trampoline (Nicholas Piggin)
   - fadump: Fix build break when CONFIG_PROC_VMCORE=n (Michael
     Ellerman)
   - Quieten EEH message when no adapters are found (Anton Blanchard)
   - powernv: Add PHB register dump debugfs handle (Russell Currey)
   - Use kprobe blacklist for exception handlers & asm functions
     (Nicholas Piggin)
   - Document the syscall ABI (Nicholas Piggin)
   - MAINTAINERS: Update cxl maintainers (Michael Neuling)
   - powerpc: Remove all usages of NO_IRQ (Michael Ellerman)

  Minor cleanups:
   - Andrew Donnellan, Christophe Leroy, Colin Ian King, Cyril Bur,
     Frederic Barrat, Pan Xinhui, PrasannaKumar Muralidharan, Rui Teng,
     Simon Guo"

* tag 'powerpc-4.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (156 commits)
  powerpc/bpf: Add support for bpf constant blinding
  powerpc/bpf: Implement support for tail calls
  powerpc/bpf: Introduce accessors for using the tmp local stack space
  powerpc/fadump: Fix build break when CONFIG_PROC_VMCORE=n
  powerpc: tm: Enable transactional memory (TM) lazily for userspace
  powerpc/tm: Add TM Unavailable Exception
  powerpc: Remove do_load_up_transact_{fpu,altivec}
  powerpc: tm: Rename transct_(*) to ck(\1)_state
  powerpc: tm: Always use fp_state and vr_state to store live registers
  selftests/powerpc: Add checks for transactional VSXs in signal contexts
  selftests/powerpc: Add checks for transactional VMXs in signal contexts
  selftests/powerpc: Add checks for transactional FPUs in signal contexts
  selftests/powerpc: Add checks for transactional GPRs in signal contexts
  selftests/powerpc: Check that signals always get delivered
  selftests/powerpc: Add TM tcheck helpers in C
  selftests/powerpc: Allow tests to extend their kill timeout
  selftests/powerpc: Introduce GPR asm helper header file
  selftests/powerpc: Move VMX stack frame macros to header file
  selftests/powerpc: Rework FPU stack placement macros and move to header file
  selftests/powerpc: Check for VSX preservation across userspace preemption
  ...
 2016-10-07 20:19:31 -07:00
Michael Ellerman
ef24ba7091 powerpc: Remove all usages of NO_IRQ 
NO_IRQ has been == 0 on powerpc for just over ten years (since commit
0ebfff1491 ("[POWERPC] Add new interrupt mapping core and change
platforms to use it")). It's also 0 on most other arches.

Although it's fairly harmless, every now and then it causes confusion
when a driver is built on powerpc and another arch which doesn't define
NO_IRQ. There's at least 6 definitions of NO_IRQ in drivers/, at least
some of which are to work around that problem.

So we'd like to remove it. This is fairly trivial in the arch code, we
just convert:

    if (irq == NO_IRQ)	to	if (!irq)
    if (irq != NO_IRQ)	to	if (irq)
    irq = NO_IRQ;	to	irq = 0;
    return NO_IRQ;	to	return 0;

And a few other odd cases as well.

At least for now we keep the #define NO_IRQ, because there is driver
code that uses NO_IRQ and the fixes to remove those will go via other
trees.

Note we also change some occurrences in PPC sound drivers, drivers/ps3,
and drivers/macintosh.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
 2016-09-20 20:57:12 +10:00
Benjamin Herrenschmidt
f8e33475b0 powerpc/xics/opal: Fix processor numbers in OPAL ICP 
When using the OPAL ICP backend we incorrectly pass Linux CPU numbers
rather than HW CPU numbers to OPAL.

Fixes: d74361881f ("powerpc/xics: Add ICP OPAL backend")
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
 2016-09-06 14:54:45 +10:00
Benjamin Herrenschmidt
d74361881f powerpc/xics: Add ICP OPAL backend 
This adds a new XICS backend that uses OPAL calls, which can be
used when we don't have native support for the platform interrupt
controller.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
 2016-07-17 16:42:45 +10:00