Commit 37b15215 authored by Marc Zyngier's avatar Marc Zyngier Committed by Greg Kroah-Hartman

arm: KVM: Allow unaligned accesses at HYP

commit 33b5c388 upstream.

We currently have the HSCTLR.A bit set, trapping unaligned accesses
at HYP, but we're not really prepared to deal with it.

Since the rest of the kernel is pretty happy about that, let's follow
its example and set HSCTLR.A to zero. Modern CPUs don't really care.
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarChristoffer Dall <cdall@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d06ca326
...@@ -95,7 +95,6 @@ __do_hyp_init: ...@@ -95,7 +95,6 @@ __do_hyp_init:
@ - Write permission implies XN: disabled @ - Write permission implies XN: disabled
@ - Instruction cache: enabled @ - Instruction cache: enabled
@ - Data/Unified cache: enabled @ - Data/Unified cache: enabled
@ - Memory alignment checks: enabled
@ - MMU: enabled (this code must be run from an identity mapping) @ - MMU: enabled (this code must be run from an identity mapping)
mrc p15, 4, r0, c1, c0, 0 @ HSCR mrc p15, 4, r0, c1, c0, 0 @ HSCR
ldr r2, =HSCTLR_MASK ldr r2, =HSCTLR_MASK
...@@ -103,8 +102,8 @@ __do_hyp_init: ...@@ -103,8 +102,8 @@ __do_hyp_init:
mrc p15, 0, r1, c1, c0, 0 @ SCTLR mrc p15, 0, r1, c1, c0, 0 @ SCTLR
ldr r2, =(HSCTLR_EE | HSCTLR_FI | HSCTLR_I | HSCTLR_C) ldr r2, =(HSCTLR_EE | HSCTLR_FI | HSCTLR_I | HSCTLR_C)
and r1, r1, r2 and r1, r1, r2
ARM( ldr r2, =(HSCTLR_M | HSCTLR_A) ) ARM( ldr r2, =(HSCTLR_M) )
THUMB( ldr r2, =(HSCTLR_M | HSCTLR_A | HSCTLR_TE) ) THUMB( ldr r2, =(HSCTLR_M | HSCTLR_TE) )
orr r1, r1, r2 orr r1, r1, r2
orr r0, r0, r1 orr r0, r0, r1
mcr p15, 4, r0, c1, c0, 0 @ HSCR mcr p15, 4, r0, c1, c0, 0 @ HSCR
......
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