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powerpc/book3s64/kuap: Move UAMOR setup to key init function

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UAMOR values are not application-specific. The kernel initializes
its value based on different reserved keys. Remove the thread-specific
UAMOR value and don't switch the UAMOR on context switch.

Move UAMOR initialization to key initialization code and remove
thread_struct.uamor because it is not used anymore.

Before commit: 4a4a5e5d2a ("powerpc/pkeys: key allocation/deallocation must not change pkey registers")
we used to update uamor based on key allocation and free.

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/20200709032946.881753-20-aneesh.kumar@linux.ibm.com
This commit is contained in:
Aneesh Kumar K.V
2020-07-09 08:59:42 +05:30
committed by Michael Ellerman
parent 000a42b35a
commit e0d8e991be
7 changed files with 44 additions and 24 deletions
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arch/powerpc/kernel/smp.c
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@@ -59,6 +59,7 @@
#include <asm/asm-prototypes.h>
#include <asm/cpu_has_feature.h>
#include <asm/ftrace.h>
#include <asm/kup.h>
#ifdef DEBUG
#include <asm/udbg.h>