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powerpc/book3s64/pkeys: Add MMU_FTR_PKEY

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Parse storage keys related device tree entry in early_init_devtree
and enable MMU feature MMU_FTR_PKEY if pkeys are supported.

MMU feature is used instead of CPU feature because this enables us
to group MMU_FTR_KUAP and MMU_FTR_PKEY in asm feature fixup code.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200709032946.881753-14-aneesh.kumar@linux.ibm.com
This commit is contained in:
Aneesh Kumar K.V
2020-07-09 08:59:36 +05:30
committed by Michael Ellerman
parent 3e4352aeb8
commit d3cd91fb8d
4 changed files with 51 additions and 22 deletions
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5
arch/powerpc/kernel/prom.c
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@@ -815,6 +815,11 @@ void __init early_init_devtree(void *params)
/* Now try to figure out if we are running on LPAR and so on */
pseries_probe_fw_features();
/*
* Initialize pkey features and default AMR/IAMR values
*/
pkey_early_init_devtree();
#ifdef CONFIG_PPC_PS3
/* Identify PS3 firmware */
if (of_flat_dt_is_compatible(of_get_flat_dt_root(), "sony,ps3"))