From: Marc Zyngier Date: Mon, 14 Jul 2025 12:26:27 +0000 (+0100) Subject: KVM: arm64: Define helper for ICH_VTR_EL2 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ce7a1cff2e4c4ec185bae25a7c53609407d2c5eb;p=thirdparty%2Flinux.git KVM: arm64: Define helper for ICH_VTR_EL2 Move the computation of the ICH_VTR_EL2 value to a common location, so that it can be reused by the save/restore code. Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20250714122634.3334816-5-maz@kernel.org Signed-off-by: Oliver Upton --- diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 6981c1b34c2c4..6763910fdf1f3 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2521,11 +2521,7 @@ static bool access_gic_vtr(struct kvm_vcpu *vcpu, if (p->is_write) return write_to_read_only(vcpu, p, r); - p->regval = kvm_vgic_global_state.ich_vtr_el2; - p->regval &= ~(ICH_VTR_EL2_DVIM | - ICH_VTR_EL2_A3V | - ICH_VTR_EL2_IDbits); - p->regval |= ICH_VTR_EL2_nV4; + p->regval = kvm_get_guest_vtr_el2(); return true; } diff --git a/arch/arm64/kvm/vgic/vgic.h b/arch/arm64/kvm/vgic/vgic.h index af4bf80b785c3..67233fa04e709 100644 --- a/arch/arm64/kvm/vgic/vgic.h +++ b/arch/arm64/kvm/vgic/vgic.h @@ -66,6 +66,21 @@ #define KVM_ICC_SRE_EL2 (ICC_SRE_EL2_ENABLE | ICC_SRE_EL2_SRE | \ ICC_SRE_EL1_DIB | ICC_SRE_EL1_DFB) +#define KVM_ICH_VTR_EL2_RES0 (ICH_VTR_EL2_DVIM | \ + ICH_VTR_EL2_A3V | \ + ICH_VTR_EL2_IDbits) +#define KVM_ICH_VTR_EL2_RES1 ICH_VTR_EL2_nV4 + +static inline u64 kvm_get_guest_vtr_el2(void) +{ + u64 vtr; + + vtr = kvm_vgic_global_state.ich_vtr_el2; + vtr &= ~KVM_ICH_VTR_EL2_RES0; + vtr |= KVM_ICH_VTR_EL2_RES1; + + return vtr; +} /* * As per Documentation/virt/kvm/devices/arm-vgic-its.rst,