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  1. 20 10月, 2018 16 次提交
  3. 19 10月, 2018 3 次提交
    • M
      powerpc/time: Fix clockevent_decrementer initalisation for PR KVM · b4d16ab5
      由 Michael Ellerman 提交于 
      In the recent commit 8b78fdb0 ("powerpc/time: Use
clockevents_register_device(), fixing an issue with large
decrementer") we changed the way we initialise the decrementer
clockevent(s).

We no longer initialise the mult & shift values of
decrementer_clockevent itself.

This has the effect of breaking PR KVM, because it uses those values
in kvmppc_emulate_dec(). The symptom is guest kernels spin forever
mid-way through boot.

For now fix it by assigning back to decrementer_clockevent the mult
and shift values.

Fixes: 8b78fdb0 ("powerpc/time: Use clockevents_register_device(), fixing an issue with large decrementer")
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
      b4d16ab5
    • M
      powerpc/aout: Fix struct user definition to use user_pt_regs · 6ce7bff0
      由 Michael Ellerman 提交于 
      I'm pretty sure this is dead code, it's only used by the a.out core
dump code, and we don't support a.out. We should remove it.

But while it's in the tree it should be using the ABI version of
pt_regs which is called user_pt_regs in the kernel, because the whole
struct is written to the core dump and so its size shouldn't change.

Note this isn't a uapi header so we don't need an ifdef.

Fixes: 002af939 ("powerpc: Split user/kernel definitions of struct pt_regs")
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
      6ce7bff0
    • M
      powerpc/uapi: Fix sigcontext definition to use user_pt_regs · 22a3d03d
      由 Michael Ellerman 提交于 
      My recent patch to split pt_regs between user and kernel missed
the usage in struct sigcontext.

Because this is a user visible struct it should be using the user
visible definition, which when we're building for the kernel is called
struct user_pt_regs.

As far as I can see this hasn't actually caused a bug (yet), because
we don't use the sizeof() the sigcontext->regs anywhere. But we should
still fix it to avoid confusion and future bugs.

Fixes: 002af939 ("powerpc: Split user/kernel definitions of struct pt_regs")
Reported-by: NMadhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
      22a3d03d
  5. 18 10月, 2018 19 次提交
  7. 14 10月, 2018 2 次提交
    • A
      powerpc/mm: Increase the max addressable memory to 2PB · 4ffe713b
      由 Aneesh Kumar K.V 提交于 
      Currently we limit the max addressable memory to 128TB. This patch increase the
limit to 2PB. We can have devices like nvdimm which adds memory above 512TB
limit.

We still don't support regular system ram above 512TB. One of the challenge with
that is the percpu allocator, that allocates per node memory and use the max
distance between them as the percpu offsets. This means with large gap in
address space ( system ram above 1PB) we will run out of vmalloc space to map
the percpu allocation.

In order to support addressable memory above 512TB, kernel should be able to
linear map this range. To do that with hash translation we now add 4 context
to kernel linear map region. Our per context addressable range is 512TB. We
still keep VMALLOC and VMEMMAP region to old size. SLB miss handlers is updated
to validate these limit.

We also limit this update to SPARSEMEM_VMEMMAP and SPARSEMEM_EXTREME
Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
      4ffe713b
    • A
      powerpc/mm/hash: Rename get_ea_context to get_user_context · c9f80734
      由 Aneesh Kumar K.V 提交于 
      We will be adding get_kernel_context later. Update function name to indicate
this handle context allocation user space address.
Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
      c9f80734