diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2017-12-22 21:17:13 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-18 15:42:48 +1100 |
| commit | 1af19331a3a18296a918802dbe032a13328e264d (patch) | |
| tree | 5811f6ccdf8a7dff2e78d289b39eaf72e5ca73ff /arch/powerpc/kernel/setup.h | |
| parent | c610d65c0ad00f1b7bfe2f1eb8f867ca74741685 (diff) | |
powerpc/64s: Relax PACA address limitations
Book3S PACA memory allocation is restricted by the RMA limit and also
must not take SLB faults when accessed in virtual mode. Currently a
fixed 256MB limit is used for this, which is imprecise and sub-optimal.
Update the paca allocation limits to use use the ppc64_rma_size for RMA
limit, and share the safe_stack_limit() that is currently used for stack
allocations that must not take virtual mode faults.
The safe_stack_limit() name is changed to ppc64_bolted_size() to match
ppc64_rma_size and some comments are updated. We also need to use
early_mmu_has_feature() because we are now calling this function prior
to the jump label patching that enables mmu_has_feature().
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Change mmu_has_feature() to early_mmu_has_feature()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/setup.h')
| -rw-r--r-- | arch/powerpc/kernel/setup.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/setup.h b/arch/powerpc/kernel/setup.h index 21c18071d9d5..3fc11e30308f 100644 --- a/arch/powerpc/kernel/setup.h +++ b/arch/powerpc/kernel/setup.h @@ -51,6 +51,10 @@ void record_spr_defaults(void); static inline void record_spr_defaults(void) { }; #endif +#ifdef CONFIG_PPC64 +u64 ppc64_bolted_size(void); +#endif + /* * Having this in kvm_ppc.h makes include dependencies too * tricky to solve for setup-common.c so have it here. |