diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-07 12:56:26 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-07 12:56:26 -0800 |
commit | 6c3ac1134371b51c9601171af2c32153ccb11100 (patch) | |
tree | 4e9d69885b3a3aa22fb0d44941d88d05d914f976 /arch/powerpc/kernel/setup_64.c | |
parent | d72cb8c7d9dbd9ce820c80f3fddb56b296ba96fc (diff) | |
parent | 9580b71b5a7863c24a9bd18bcd2ad759b86b1eff (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/kernel/setup_64.c')
-rw-r--r-- | arch/powerpc/kernel/setup_64.c | 51 |
1 files changed, 10 insertions, 41 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 236c1151a3a7..daa361fc6a24 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -634,19 +634,17 @@ __init u64 ppc64_bolted_size(void) static void *__init alloc_stack(unsigned long limit, int cpu) { - unsigned long pa; + void *ptr; BUILD_BUG_ON(STACK_INT_FRAME_SIZE % 16); - pa = memblock_alloc_base_nid(THREAD_SIZE, THREAD_SIZE, limit, - early_cpu_to_node(cpu), MEMBLOCK_NONE); - if (!pa) { - pa = memblock_alloc_base(THREAD_SIZE, THREAD_SIZE, limit); - if (!pa) - panic("cannot allocate stacks"); - } + ptr = memblock_alloc_try_nid(THREAD_SIZE, THREAD_SIZE, + MEMBLOCK_LOW_LIMIT, limit, + early_cpu_to_node(cpu)); + if (!ptr) + panic("cannot allocate stacks"); - return __va(pa); + return ptr; } void __init irqstack_early_init(void) @@ -692,24 +690,6 @@ void __init exc_lvl_early_init(void) #endif /* - * Emergency stacks are used for a range of things, from asynchronous - * NMIs (system reset, machine check) to synchronous, process context. - * We set preempt_count to zero, even though that isn't necessarily correct. To - * get the right value we'd need to copy it from the previous thread_info, but - * doing that might fault causing more problems. - * TODO: what to do with accounting? - */ -static void emerg_stack_init_thread_info(struct thread_info *ti, int cpu) -{ - ti->task = NULL; - ti->cpu = cpu; - ti->preempt_count = 0; - ti->local_flags = 0; - ti->flags = 0; - klp_init_thread_info(ti); -} - -/* * Stack space used when we detect a bad kernel stack pointer, and * early in SMP boots before relocation is enabled. Exclusive emergency * stack for machine checks. @@ -736,25 +716,14 @@ void __init emergency_stack_init(void) limit = min(ppc64_bolted_size(), ppc64_rma_size); for_each_possible_cpu(i) { - struct thread_info *ti; - - ti = alloc_stack(limit, i); - memset(ti, 0, THREAD_SIZE); - emerg_stack_init_thread_info(ti, i); - paca_ptrs[i]->emergency_sp = (void *)ti + THREAD_SIZE; + paca_ptrs[i]->emergency_sp = alloc_stack(limit, i) + THREAD_SIZE; #ifdef CONFIG_PPC_BOOK3S_64 /* emergency stack for NMI exception handling. */ - ti = alloc_stack(limit, i); - memset(ti, 0, THREAD_SIZE); - emerg_stack_init_thread_info(ti, i); - paca_ptrs[i]->nmi_emergency_sp = (void *)ti + THREAD_SIZE; + paca_ptrs[i]->nmi_emergency_sp = alloc_stack(limit, i) + THREAD_SIZE; /* emergency stack for machine check exception handling. */ - ti = alloc_stack(limit, i); - memset(ti, 0, THREAD_SIZE); - emerg_stack_init_thread_info(ti, i); - paca_ptrs[i]->mc_emergency_sp = (void *)ti + THREAD_SIZE; + paca_ptrs[i]->mc_emergency_sp = alloc_stack(limit, i) + THREAD_SIZE; #endif } } |