summaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/powernv/idle.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-07 12:56:26 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-07 12:56:26 -0800
commit6c3ac1134371b51c9601171af2c32153ccb11100 (patch)
tree4e9d69885b3a3aa22fb0d44941d88d05d914f976 /arch/powerpc/platforms/powernv/idle.c
parentd72cb8c7d9dbd9ce820c80f3fddb56b296ba96fc (diff)
parent9580b71b5a7863c24a9bd18bcd2ad759b86b1eff (diff)
Merge tag 'powerpc-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman: "Notable changes: - Enable THREAD_INFO_IN_TASK to move thread_info off the stack. - A big series from Christoph reworking our DMA code to use more of the generic infrastructure, as he said: "This series switches the powerpc port to use the generic swiotlb and noncoherent dma ops, and to use more generic code for the coherent direct mapping, as well as removing a lot of dead code." - Increase our vmalloc space to 512T with the Hash MMU on modern CPUs, allowing us to support machines with larger amounts of total RAM or distance between nodes. - Two series from Christophe, one to optimise TLB miss handlers on 6xx, and another to optimise the way STRICT_KERNEL_RWX is implemented on some 32-bit CPUs. - Support for KCOV coverage instrumentation which means we can run syzkaller and discover even more bugs in our code. And as always many clean-ups, reworks and minor fixes etc. Thanks to: Alan Modra, Alexey Kardashevskiy, Alistair Popple, Andrea Arcangeli, Andrew Donnellan, Aneesh Kumar K.V, Aravinda Prasad, Balbir Singh, Brajeswar Ghosh, Breno Leitao, Christian Lamparter, Christian Zigotzky, Christophe Leroy, Christoph Hellwig, Corentin Labbe, Daniel Axtens, David Gibson, Diana Craciun, Firoz Khan, Gustavo A. R. Silva, Igor Stoppa, Joe Lawrence, Joel Stanley, Jonathan Neuschäfer, Jordan Niethe, Laurent Dufour, Madhavan Srinivasan, Mahesh Salgaonkar, Mark Cave-Ayland, Masahiro Yamada, Mathieu Malaterre, Matteo Croce, Meelis Roos, Michael W. Bringmann, Nathan Chancellor, Nathan Fontenot, Nicholas Piggin, Nick Desaulniers, Nicolai Stange, Oliver O'Halloran, Paul Mackerras, Peter Xu, PrasannaKumar Muralidharan, Qian Cai, Rashmica Gupta, Reza Arbab, Robert P. J. Day, Russell Currey, Sabyasachi Gupta, Sam Bobroff, Sandipan Das, Sergey Senozhatsky, Souptick Joarder, Stewart Smith, Tyrel Datwyler, Vaibhav Jain, YueHaibing" * tag 'powerpc-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (200 commits) powerpc/32: Clear on-stack exception marker upon exception return powerpc: Remove export of save_stack_trace_tsk_reliable() powerpc/mm: fix "section_base" set but not used powerpc/mm: Fix "sz" set but not used warning powerpc/mm: Check secondary hash page table powerpc: remove nargs from __SYSCALL powerpc/64s: Fix unrelocated interrupt trampoline address test powerpc/powernv/ioda: Fix locked_vm counting for memory used by IOMMU tables powerpc/fsl: Fix the flush of branch predictor. powerpc/powernv: Make opal log only readable by root powerpc/xmon: Fix opcode being uninitialized in print_insn_powerpc powerpc/powernv: move OPAL call wrapper tracing and interrupt handling to C powerpc/64s: Fix data interrupts vs d-side MCE reentrancy powerpc/64s: Prepare to handle data interrupts vs d-side MCE reentrancy powerpc/64s: system reset interrupt preserve HSRRs powerpc/64s: Fix HV NMI vs HV interrupt recoverability test powerpc/mm/hash: Handle mmap_min_addr correctly in get_unmapped_area topdown search powerpc/hugetlb: Handle mmap_min_addr correctly in get_unmapped_area callback selftests/powerpc: Remove duplicate header powerpc sstep: Add support for modsd, modud instructions ...
Diffstat (limited to 'arch/powerpc/platforms/powernv/idle.c')
-rw-r--r--arch/powerpc/platforms/powernv/idle.c27
1 files changed, 2 insertions, 25 deletions
diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c
index 35f699ebb662..e52f9b06dd9c 100644
--- a/arch/powerpc/platforms/powernv/idle.c
+++ b/arch/powerpc/platforms/powernv/idle.c
@@ -458,7 +458,8 @@ EXPORT_SYMBOL_GPL(pnv_power9_force_smt4_release);
#endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
#ifdef CONFIG_HOTPLUG_CPU
-static void pnv_program_cpu_hotplug_lpcr(unsigned int cpu, u64 lpcr_val)
+
+void pnv_program_cpu_hotplug_lpcr(unsigned int cpu, u64 lpcr_val)
{
u64 pir = get_hard_smp_processor_id(cpu);
@@ -481,20 +482,6 @@ unsigned long pnv_cpu_offline(unsigned int cpu)
{
unsigned long srr1;
u32 idle_states = pnv_get_supported_cpuidle_states();
- u64 lpcr_val;
-
- /*
- * We don't want to take decrementer interrupts while we are
- * offline, so clear LPCR:PECE1. We keep PECE2 (and
- * LPCR_PECE_HVEE on P9) enabled as to let IPIs in.
- *
- * If the CPU gets woken up by a special wakeup, ensure that
- * the SLW engine sets LPCR with decrementer bit cleared, else
- * the CPU will come back to the kernel due to a spurious
- * wakeup.
- */
- lpcr_val = mfspr(SPRN_LPCR) & ~(u64)LPCR_PECE1;
- pnv_program_cpu_hotplug_lpcr(cpu, lpcr_val);
__ppc64_runlatch_off();
@@ -526,16 +513,6 @@ unsigned long pnv_cpu_offline(unsigned int cpu)
__ppc64_runlatch_on();
- /*
- * Re-enable decrementer interrupts in LPCR.
- *
- * Further, we want stop states to be woken up by decrementer
- * for non-hotplug cases. So program the LPCR via stop api as
- * well.
- */
- lpcr_val = mfspr(SPRN_LPCR) | (u64)LPCR_PECE1;
- pnv_program_cpu_hotplug_lpcr(cpu, lpcr_val);
-
return srr1;
}
#endif