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KVM: arm64: Use sanitized values in __check_override in nVHE

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The nVHE EL2 code has access to sanitized values of certain idregs, so
use them directly from __check_override instead of the *_override
variants.

Signed-off-by: Quentin Perret <qperret@google.com>
Link: https://lore.kernel.org/r/20230201103755.1398086-4-qperret@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Quentin Perret
2023-02-01 10:37:53 +00:00
committed by Oliver Upton
parent e2d4f5ae17
commit 3c4cc31537
1 changed files with 14 additions and 0 deletions
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14
arch/arm64/include/asm/el2_setup.h
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@@ -196,6 +196,7 @@
__init_el2_nvhe_prepare_eret
.endm
#ifndef __KVM_NVHE_HYPERVISOR__
// This will clobber tmp1 and tmp2, and expect tmp1 to contain
// the id register value as read from the HW
.macro __check_override idreg, fld, width, pass, fail, tmp1, tmp2
@@ -219,6 +220,19 @@
mrs \tmp1, \idreg\()_el1
__check_override \idreg \fld 4 \pass \fail \tmp1 \tmp2
.endm
#else
// This will clobber tmp
.macro __check_override idreg, fld, width, pass, fail, tmp, ignore
ldr_l \tmp, \idreg\()_el1_sys_val
ubfx \tmp, \tmp, #\fld, #\width
cbnz \tmp, \pass
b \fail
.endm
.macro check_override idreg, fld, pass, fail, tmp, ignore
__check_override \idreg \fld 4 \pass \fail \tmp \ignore
.endm
#endif
.macro finalise_el2_state
check_override id_aa64pfr0, ID_AA64PFR0_EL1_SVE_SHIFT, .Linit_sve_\@, .Lskip_sve_\@, x1, x2