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powerpc/book3s: Fix flush_tlb cpu_spec hook to take a generic argument.

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The flush_tlb hook in cpu_spec was introduced as a generic function hook
to invalidate TLBs. But the current implementation of flush_tlb hook
takes IS (invalidation selector) as an argument which is architecture
dependent. Hence, It is not right to have a generic routine where caller
has to pass non-generic argument.

This patch fixes this and makes flush_tlb hook as high level API.

Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Mahesh Salgaonkar
2014-12-19 08:41:05 +05:30
committed by Michael Ellerman
parent 7f664cf9e4
commit 45706bb53d
6 changed files with 65 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
arch/powerpc/kernel/cpu_setup_power.S
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@@ -137,15 +137,11 @@ __init_HFSCR:
/*
* Clear the TLB using the specified IS form of tlbiel instruction
* (invalidate by congruence class). P7 has 128 CCs., P8 has 512.
*
* r3 = IS field
*/
__init_tlb_power7:
li r3,0xc00 /* IS field = 0b11 */
_GLOBAL(__flush_tlb_power7)
li r6,128
mtctr r6
mr r7,r3 /* IS field */
li r7,0xc00 /* IS field = 0b11 */
ptesync
2: tlbiel r7
addi r7,r7,0x1000
@@ -154,11 +150,9 @@ _GLOBAL(__flush_tlb_power7)
1: blr
__init_tlb_power8:
li r3,0xc00 /* IS field = 0b11 */
_GLOBAL(__flush_tlb_power8)
li r6,512
mtctr r6
mr r7,r3 /* IS field */
li r7,0xc00 /* IS field = 0b11 */
ptesync
2: tlbiel r7
addi r7,r7,0x1000