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Commit ef268de1 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'powerpc-4.20-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux 

Pull powerpc fixes from Michael Ellerman:
 "Two weeks worth of fixes since rc1.

   - I broke 16-byte alignment of the stack when we moved PPR into
     pt_regs. Despite being required by the ABI this broke almost
     nothing, we eventually hit it in code where GCC does arithmetic on
     the stack pointer assuming the bottom 4 bits are clear. Fix it by
     padding the in-kernel pt_regs by 8 bytes.

   - A couple of commits fixing minor bugs in the recent SLB rewrite.

   - A build fix related to tracepoints in KVM in some configurations.

   - Our old "IO workarounds" code written for Cell couldn't coexist in
     a kernel that runs on Power9 with the Radix MMU, fix that.

   - Remove the NPU DMA ops, these just printed a warning and should
     never have been called.

   - Suppress an overly chatty message triggered by CPU hotplug in some
     configs.

   - Two small selftest fixes.

  Thanks to: Alistair Popple, Gustavo Romero, Nicholas Piggin, Satheesh
  Rajendran, Scott Wood"

* tag 'powerpc-4.20-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  selftests/powerpc: Adjust wild_bctr to build with old binutils
  powerpc/64: Fix kernel stack 16-byte alignment
  powerpc/numa: Suppress "VPHN is not supported" messages
  selftests/powerpc: Fix wild_bctr test to work on ppc64
  powerpc/io: Fix the IO workarounds code to work with Radix
  powerpc/mm/64s: Fix preempt warning in slb_allocate_kernel()
  KVM: PPC: Move and undef TRACE_INCLUDE_PATH/FILE
  powerpc/mm/64s: Only use slbfee on CPUs that support it
  powerpc/mm/64s: Use PPC_SLBFEE macro
  powerpc/mm/64s: Consolidate SLB assertions
  powerpc/powernv/npu: Remove NPU DMA ops
parents 50d25bdc b2fed34a

arch/powerpc/include/asm/io.h

+7 −13
Original line number Diff line number Diff line
@@ -268,19 +268,13 @@ extern void _memcpy_toio(volatile void __iomem *dest, const void *src, 
 * their hooks, a bitfield is reserved for use by the platform near the

 * top of MMIO addresses (not PIO, those have to cope the hard way).

 *

 * This bit field is 12 bits and is at the top of the IO virtual

 * addresses PCI_IO_INDIRECT_TOKEN_MASK.

 * The highest address in the kernel virtual space are:

 *

 * The kernel virtual space is thus:

 *  d0003fffffffffff	# with Hash MMU

 *  c00fffffffffffff	# with Radix MMU

 *

 *  0xD000000000000000		: vmalloc

 *  0xD000080000000000		: PCI PHB IO space

 *  0xD000080080000000		: ioremap

 *  0xD0000fffffffffff		: end of ioremap region

 *

 * Since the top 4 bits are reserved as the region ID, we use thus

 * the next 12 bits and keep 4 bits available for the future if the

 * virtual address space is ever to be extended.

 * The top 4 bits are reserved as the region ID on hash, leaving us 8 bits

 * that can be used for the field.

 *

 * The direct IO mapping operations will then mask off those bits

 * before doing the actual access, though that only happen when
@@ -292,8 +286,8 @@ extern void _memcpy_toio(volatile void __iomem *dest, const void *src, 
 */



#ifdef CONFIG_PPC_INDIRECT_MMIO

#define PCI_IO_IND_TOKEN_MASK	0x0fff000000000000ul

#define PCI_IO_IND_TOKEN_SHIFT	48

#define PCI_IO_IND_TOKEN_SHIFT	52

#define PCI_IO_IND_TOKEN_MASK	(0xfful << PCI_IO_IND_TOKEN_SHIFT)

#define PCI_FIX_ADDR(addr)						\

	((PCI_IO_ADDR)(((unsigned long)(addr)) & ~PCI_IO_IND_TOKEN_MASK))

#define PCI_GET_ADDR_TOKEN(addr)					\

arch/powerpc/include/asm/ppc-opcode.h

+2 −0
Original line number Diff line number Diff line
@@ -493,6 +493,8 @@ 
					__PPC_RS(t) | __PPC_RA0(a) | __PPC_RB(b))

#define PPC_SLBFEE_DOT(t, b)	stringify_in_c(.long PPC_INST_SLBFEE | \

					__PPC_RT(t) | __PPC_RB(b))

#define __PPC_SLBFEE_DOT(t, b)	stringify_in_c(.long PPC_INST_SLBFEE |	\

					       ___PPC_RT(t) | ___PPC_RB(b))

#define PPC_ICBT(c,a,b)		stringify_in_c(.long PPC_INST_ICBT | \

				       __PPC_CT(c) | __PPC_RA0(a) | __PPC_RB(b))

/* PASemi instructions */

arch/powerpc/include/asm/ptrace.h

+1 −0
Original line number Diff line number Diff line
@@ -54,6 +54,7 @@ struct pt_regs 


#ifdef CONFIG_PPC64

	unsigned long ppr;

	unsigned long __pad;	/* Maintain 16 byte interrupt stack alignment */

#endif

};

#endif

arch/powerpc/kernel/setup_64.c

+2 −0
Original line number Diff line number Diff line
@@ -636,6 +636,8 @@ static void *__init alloc_stack(unsigned long limit, int cpu) 
{

	unsigned long pa;



	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) {

arch/powerpc/kvm/trace.h

+6 −2
Original line number Diff line number Diff line
@@ -6,8 +6,6 @@ 


#undef TRACE_SYSTEM

#define TRACE_SYSTEM kvm

#define TRACE_INCLUDE_PATH .

#define TRACE_INCLUDE_FILE trace



/*

 * Tracepoint for guest mode entry.
@@ -120,4 +118,10 @@ TRACE_EVENT(kvm_check_requests, 
#endif /* _TRACE_KVM_H */



/* This part must be outside protection */

#undef TRACE_INCLUDE_PATH

#undef TRACE_INCLUDE_FILE



#define TRACE_INCLUDE_PATH .

#define TRACE_INCLUDE_FILE trace



#include <trace/define_trace.h>