powerpc/mm: Write to PTCR only if ultravisor disabled

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In ultravisor enabled systems, PTCR becomes ultravisor privileged only
for writing and an attempt to write to it will cause a Hypervisor
Emulation Assitance interrupt.

This patch uses the set_ptcr_when_no_uv() function to restrict PTCR
writing to only when ultravisor is disabled.

Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190822034838.27876-6-cclaudio@linux.ibm.com

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Claudio Carvalho 2019-08-22 00:48:36 -03:00 • committed by Michael Ellerman

parent 139a1d2842

commit 5223134029

4 changed files with 21 additions and 6 deletions

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12

arch/powerpc/include/asm/ultravisor.h

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5

arch/powerpc/mm/book3s64/hash_utils.c

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2

arch/powerpc/mm/book3s64/pgtable.c

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8

arch/powerpc/mm/book3s64/radix_pgtable.c

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