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| author | Marc Zyngier <maz@kernel.org> | 2024-10-23 15:53:21 +0100 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2024-10-31 02:42:30 +0000 |
| commit | 5055938452ede673baf13bda4fe84d8fac2bee76 (patch) | |
| tree | ba3431f3f2e30c8d68839268401611f863770c1a /arch/arm64/kvm/hyp | |
| parent | ad4f6ef0fa19d0418e4087fd6783679c3fdfa888 (diff) | |
| download | lwn-5055938452ede673baf13bda4fe84d8fac2bee76.tar.gz lwn-5055938452ede673baf13bda4fe84d8fac2bee76.zip | |
KVM: arm64: Add save/restore for TCR2_EL2
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>
Diffstat (limited to 'arch/arm64/kvm/hyp')
| -rw-r--r-- | arch/arm64/kvm/hyp/vhe/sysreg-sr.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/vhe/sysreg-sr.c b/arch/arm64/kvm/hyp/vhe/sysreg-sr.c index 922aac39b021..cdbf52bfc483 100644 --- a/arch/arm64/kvm/hyp/vhe/sysreg-sr.c +++ b/arch/arm64/kvm/hyp/vhe/sysreg-sr.c @@ -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); |