diff options
Diffstat (limited to 'arch/arm64/kvm/hyp/s2-setup.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/s2-setup.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/s2-setup.c b/arch/arm64/kvm/hyp/s2-setup.c index bcbe761a5..b81f4091c 100644 --- a/arch/arm64/kvm/hyp/s2-setup.c +++ b/arch/arm64/kvm/hyp/s2-setup.c @@ -66,6 +66,14 @@ u32 __hyp_text __init_stage2_translation(void) val |= 64 - (parange > 40 ? 40 : parange); /* + * Check the availability of Hardware Access Flag / Dirty Bit + * Management in ID_AA64MMFR1_EL1 and enable the feature in VTCR_EL2. + */ + tmp = (read_sysreg(id_aa64mmfr1_el1) >> ID_AA64MMFR1_HADBS_SHIFT) & 0xf; + if (IS_ENABLED(CONFIG_ARM64_HW_AFDBM) && tmp) + val |= VTCR_EL2_HA; + + /* * Read the VMIDBits bits from ID_AA64MMFR1_EL1 and set the VS * bit in VTCR_EL2. */ |