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-rw-r--r--arch/arm64/kvm/hyp.S9
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S
index 17a8fb14f..3c6051cbf 100644
--- a/arch/arm64/kvm/hyp.S
+++ b/arch/arm64/kvm/hyp.S
@@ -840,8 +840,6 @@
mrs x3, cntv_ctl_el0
and x3, x3, #3
str w3, [x0, #VCPU_TIMER_CNTV_CTL]
- bic x3, x3, #1 // Clear Enable
- msr cntv_ctl_el0, x3
isb
@@ -849,6 +847,9 @@
str x3, [x0, #VCPU_TIMER_CNTV_CVAL]
1:
+ // Disable the virtual timer
+ msr cntv_ctl_el0, xzr
+
// Allow physical timer/counter access for the host
mrs x2, cnthctl_el2
orr x2, x2, #3
@@ -943,13 +944,15 @@ ENTRY(__kvm_vcpu_run)
// Guest context
add x2, x0, #VCPU_CONTEXT
+ // We must restore the 32-bit state before the sysregs, thanks
+ // to Cortex-A57 erratum #852523.
+ restore_guest_32bit_state
bl __restore_sysregs
bl __restore_fpsimd
skip_debug_state x3, 1f
bl __restore_debug
1:
- restore_guest_32bit_state
restore_guest_regs
// That's it, no more messing around.