[PATCH v4 19/19] KVM: arm64: Promote guest ownership for DBGxVR/DBGxCR reads

[Oliver Upton <oliver.upton@linux.dev>]

Only yielding control of the debug registers for writes is a bit silly,
unless of course you're a fan of pointless traps. Give control of the
debug registers to the guest upon the first access, regardless of
direction.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
---
 arch/arm64/kvm/sys_regs.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index d9c7911ec58a..aac79e34cd50 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -643,8 +643,6 @@ static void reg_to_dbg(struct kvm_vcpu *vcpu,
 	val &= ~mask;
 	val |= (p->regval & (mask >> shift)) << shift;
 	*dbg_reg = val;
-
-	kvm_debug_set_guest_ownership(vcpu);
 }
 
 static void dbg_to_reg(struct kvm_vcpu *vcpu,
@@ -690,6 +688,7 @@ static bool trap_dbg_wb_reg(struct kvm_vcpu *vcpu, struct sys_reg_params *p,
 	else
 		dbg_to_reg(vcpu, p, rd, reg);
 
+	kvm_debug_set_guest_ownership(vcpu);
 	return true;
 }
 
-- 
2.39.5