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powerpc/mm: extend _PAGE_PRIVILEGED to all CPUs

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commit ac29c64089 ("powerpc/mm: Replace _PAGE_USER with
_PAGE_PRIVILEGED") introduced _PAGE_PRIVILEGED for BOOK3S/64

This patch generalises _PAGE_PRIVILEGED for all CPUs, allowing
to have either _PAGE_PRIVILEGED or _PAGE_USER or both.

PPC_8xx has a _PAGE_SHARED flag which is set for and only for
all non user pages. Lets rename it _PAGE_PRIVILEGED to remove
confusion as it has nothing to do with Linux shared pages.

On BookE, there's a _PAGE_BAP_SR which has to be set for kernel
pages: defining _PAGE_PRIVILEGED as _PAGE_BAP_SR will make
this generic

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy
2018-01-12 13:45:27 +01:00
committed by Michael Ellerman
parent 5f356497c3
commit 812fadcb94
10 changed files with 28 additions and 54 deletions
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arch/powerpc/mm/8xx_mmu.c
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@@ -67,7 +67,7 @@ void __init MMU_init_hw(void)
/* PIN up to the 3 first 8Mb after IMMR in DTLB table */
#ifdef CONFIG_PIN_TLB_DATA
unsigned long ctr = mfspr(SPRN_MD_CTR) & 0xfe000000;
unsigned long flags = 0xf0 | MD_SPS16K | _PAGE_SHARED | _PAGE_DIRTY;
unsigned long flags = 0xf0 | MD_SPS16K | _PAGE_PRIVILEGED | _PAGE_DIRTY;
#ifdef CONFIG_PIN_TLB_IMMR
int i = 29;
#else