diff mbox series

[v4,31/36] KVM: arm64: Add save/retore support for POR_EL2

Message ID 20241009190019.3222687-32-maz@kernel.org (mailing list archive)
State New
Headers show
Series KVM: arm64: Add EL2 support to FEAT_S1PIE/S1POE | expand

Commit Message

Marc Zyngier Oct. 9, 2024, 7 p.m. UTC 
POR_EL2 needs saving when the guest is VHE, and restoring in
any case.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/hyp/vhe/sysreg-sr.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/kvm/hyp/vhe/sysreg-sr.c b/arch/arm64/kvm/hyp/vhe/sysreg-sr.c
index 005175c10b4a9..86078bd37f8bb 100644
--- a/arch/arm64/kvm/hyp/vhe/sysreg-sr.c
+++ b/arch/arm64/kvm/hyp/vhe/sysreg-sr.c
@@ -58,6 +58,9 @@  static void __sysreg_save_vel2_state(struct kvm_vcpu *vcpu)
 				__vcpu_sys_reg(vcpu, PIRE0_EL2) = read_sysreg_el1(SYS_PIRE0);
 				__vcpu_sys_reg(vcpu, PIR_EL2) = read_sysreg_el1(SYS_PIR);
 			}
+
+			if (ctxt_has_s1poe(&vcpu->arch.ctxt))
+				__vcpu_sys_reg(vcpu, POR_EL2) = read_sysreg_el1(SYS_POR);
 		}
 
 		/*
@@ -124,6 +127,9 @@  static void __sysreg_restore_vel2_state(struct kvm_vcpu *vcpu)
 			write_sysreg_el1(__vcpu_sys_reg(vcpu, PIR_EL2), SYS_PIR);
 			write_sysreg_el1(__vcpu_sys_reg(vcpu, PIRE0_EL2), SYS_PIRE0);
 		}
+
+		if (ctxt_has_s1poe(&vcpu->arch.ctxt))
+			write_sysreg_el1(__vcpu_sys_reg(vcpu, POR_EL2), SYS_POR);
 	}
 
 	write_sysreg_el1(__vcpu_sys_reg(vcpu, ESR_EL2),		SYS_ESR);