github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-01 11:03:43 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: arm64: selftests: Test writes to ID_AA64MMFR1_EL1.{HCX, TWED}

Browse Source 
Assert that the EL2 features {HCX, TWED} of ID_AA64MMFR1_EL1 are writable
from userspace. They are only allowed to be downgraded in userspace.

Signed-off-by: Jinqian Yang <yangjinqian1@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Jinqian Yang 2025-09-11 19:46:21 +08:00 committed by Marc Zyngier
parent 1a0b2bf6ff
commit be8c9192ea
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/testing/selftests/kvm/arm64/set_id_regs.c
View File

@ -165,7 +165,9 @@ static const struct reg_ftr_bits ftr_id_aa64mmfr0_el1[] = {
static const struct reg_ftr_bits ftr_id_aa64mmfr1_el1[] = {
REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64MMFR1_EL1, TIDCP1, 0),
REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64MMFR1_EL1, AFP, 0),
REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64MMFR1_EL1, HCX, 0),
REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64MMFR1_EL1, ETS, 0),
REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64MMFR1_EL1, TWED, 0),
REG_FTR_BITS(FTR_HIGHER_SAFE, ID_AA64MMFR1_EL1, SpecSEI, 0),
REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64MMFR1_EL1, PAN, 0),
REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64MMFR1_EL1, LO, 0),