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KVM: arm64: Add save/restore for TCR2_EL2

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Like its EL1 equivalent, TCR2_EL2 gets context-switched.
This is made conditional on FEAT_TCRX being adversised.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20241023145345.1613824-14-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Marc Zyngier 2024-10-23 15:53:21 +01:00 • committed by Oliver Upton
parent ad4f6ef0fa
commit 5055938452
1 changed files with 7 additions and 0 deletions
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7
arch/arm64/kvm/hyp/vhe/sysreg-sr.c
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@ -51,6 +51,9 @@ static void __sysreg_save_vel2_state(struct kvm_vcpu *vcpu)
__vcpu_sys_reg(vcpu, TTBR1_EL2) = read_sysreg_el1(SYS_TTBR1);
__vcpu_sys_reg(vcpu, TCR_EL2) = read_sysreg_el1(SYS_TCR);
if (ctxt_has_tcrx(&vcpu->arch.ctxt))
__vcpu_sys_reg(vcpu, TCR2_EL2) = read_sysreg_el1(SYS_TCR2);
/*
* The EL1 view of CNTKCTL_EL1 has a bunch of RES0 bits where
* the interesting CNTHCTL_EL2 bits live. So preserve these
@ -107,6 +110,10 @@ static void __sysreg_restore_vel2_state(struct kvm_vcpu *vcpu)
write_sysreg_el1(val, SYS_TCR);
}
if (ctxt_has_tcrx(&vcpu->arch.ctxt))
write_sysreg_el1(__vcpu_sys_reg(vcpu, TCR2_EL2), SYS_TCR2);
write_sysreg_el1(__vcpu_sys_reg(vcpu, ESR_EL2), SYS_ESR);
write_sysreg_el1(__vcpu_sys_reg(vcpu, AFSR0_EL2), SYS_AFSR0);
write_sysreg_el1(__vcpu_sys_reg(vcpu, AFSR1_EL2), SYS_AFSR1);