diff options
| author | Marc Zyngier <maz@kernel.org> | 2024-02-14 16:18:20 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2024-02-19 20:13:01 +0300 |
| commit | c5bac1ef7df6bcce4feaa5a609119cab5d5e4730 (patch) | |
| tree | 45d2beb431d589ed7a73cc88d7d6d33037bea523 /arch/arm64/kvm/sys_regs.c | |
| parent | f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f (diff) | |
| download | linux-c5bac1ef7df6bcce4feaa5a609119cab5d5e4730.tar.xz | |
KVM: arm64: Move existing feature disabling over to FGU infrastructure
We already trap a bunch of existing features for the purpose of
disabling them (MAIR2, POR, ACCDATA, SME...).
Let's move them over to our brand new FGU infrastructure.
Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240214131827.2856277-20-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch/arm64/kvm/sys_regs.c')
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 938df5dc3684..39e7c7f74717 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -3942,6 +3942,29 @@ int kvm_vm_ioctl_get_reg_writable_masks(struct kvm *kvm, struct reg_mask_range * return 0; } +void kvm_init_sysreg(struct kvm_vcpu *vcpu) +{ + struct kvm *kvm = vcpu->kvm; + + mutex_lock(&kvm->arch.config_lock); + + if (test_bit(KVM_ARCH_FLAG_FGU_INITIALIZED, &kvm->arch.flags)) + goto out; + + kvm->arch.fgu[HFGxTR_GROUP] = (HFGxTR_EL2_nAMAIR2_EL1 | + HFGxTR_EL2_nMAIR2_EL1 | + HFGxTR_EL2_nS2POR_EL1 | + HFGxTR_EL2_nPOR_EL1 | + HFGxTR_EL2_nPOR_EL0 | + HFGxTR_EL2_nACCDATA_EL1 | + HFGxTR_EL2_nSMPRI_EL1_MASK | + HFGxTR_EL2_nTPIDR2_EL0_MASK); + + set_bit(KVM_ARCH_FLAG_FGU_INITIALIZED, &kvm->arch.flags); +out: + mutex_unlock(&kvm->arch.config_lock); +} + int __init kvm_sys_reg_table_init(void) { struct sys_reg_params params; |