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Diffstat (limited to 'arch/arm64/kvm/hyp/switch.c')
-rw-r--r--arch/arm64/kvm/hyp/switch.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c
index 75e83dd40d43..aede1658aeda 100644
--- a/arch/arm64/kvm/hyp/switch.c
+++ b/arch/arm64/kvm/hyp/switch.c
@@ -103,7 +103,13 @@ static void __hyp_text __activate_traps(struct kvm_vcpu *vcpu)
static void __hyp_text __deactivate_traps_vhe(void)
{
extern char vectors[]; /* kernel exception vectors */
+ u64 mdcr_el2 = read_sysreg(mdcr_el2);
+ mdcr_el2 &= MDCR_EL2_HPMN_MASK |
+ MDCR_EL2_E2PB_MASK << MDCR_EL2_E2PB_SHIFT |
+ MDCR_EL2_TPMS;
+
+ write_sysreg(mdcr_el2, mdcr_el2);
write_sysreg(HCR_HOST_VHE_FLAGS, hcr_el2);
write_sysreg(CPACR_EL1_FPEN, cpacr_el1);
write_sysreg(vectors, vbar_el1);
@@ -111,6 +117,12 @@ static void __hyp_text __deactivate_traps_vhe(void)
static void __hyp_text __deactivate_traps_nvhe(void)
{
+ u64 mdcr_el2 = read_sysreg(mdcr_el2);
+
+ mdcr_el2 &= MDCR_EL2_HPMN_MASK;
+ mdcr_el2 |= MDCR_EL2_E2PB_MASK << MDCR_EL2_E2PB_SHIFT;
+
+ write_sysreg(mdcr_el2, mdcr_el2);
write_sysreg(HCR_RW, hcr_el2);
write_sysreg(CPTR_EL2_DEFAULT, cptr_el2);
}
@@ -132,7 +144,6 @@ static void __hyp_text __deactivate_traps(struct kvm_vcpu *vcpu)
__deactivate_traps_arch()();
write_sysreg(0, hstr_el2);
- write_sysreg(read_sysreg(mdcr_el2) & MDCR_EL2_HPMN_MASK, mdcr_el2);
write_sysreg(0, pmuserenr_el0);
}
@@ -357,6 +368,10 @@ again:
}
__debug_save_state(vcpu, kern_hyp_va(vcpu->arch.debug_ptr), guest_ctxt);
+ /*
+ * This must come after restoring the host sysregs, since a non-VHE
+ * system may enable SPE here and make use of the TTBRs.
+ */
__debug_cond_restore_host_state(vcpu);
return exit_code;