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authorNicholas Piggin <npiggin@gmail.com>2018-02-14 01:08:12 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2018-03-30 23:34:23 +1100
commitd2e60075a3d4422dc54b919f3b125d8066b839d4 (patch)
tree0a053b218a2b6645da86b32e75947899158d3c33 /arch/powerpc/include/asm/paca.h
parent8e0b634b132752ec3eba50afb952502b1a87d6ba (diff)
powerpc/64: Use array of paca pointers and allocate pacas individually
Change the paca array into an array of pointers to pacas. Allocate pacas individually. This allows flexibility in where the PACAs are allocated. Future work will allocate them node-local. Platforms that don't have address limits on PACAs would be able to defer PACA allocations until later in boot rather than allocate all possible ones up-front then freeing unused. This is slightly more overhead (one additional indirection) for cross CPU paca references, but those aren't too common. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/paca.h')
-rw-r--r--arch/powerpc/include/asm/paca.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
index 6db5ab2a29a3..e89887f5e56f 100644
--- a/arch/powerpc/include/asm/paca.h
+++ b/arch/powerpc/include/asm/paca.h
@@ -249,10 +249,10 @@ struct paca_struct {
void *rfi_flush_fallback_area;
u64 l1d_flush_size;
#endif
-};
+} ____cacheline_aligned;
extern void copy_mm_to_paca(struct mm_struct *mm);
-extern struct paca_struct *paca;
+extern struct paca_struct **paca_ptrs;
extern void initialise_paca(struct paca_struct *new_paca, int cpu);
extern void setup_paca(struct paca_struct *new_paca);
extern void allocate_pacas(void);