arm64: KVM: vgic-v3: Allow the use of the xzr register
Let's save a tiny bit of generated code by telling the assembler that
using xzr is OK when accessing a GICv3 system register.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/arch/arm64/kvm/hyp/vgic-v3-sr.c b/arch/arm64/kvm/hyp/vgic-v3-sr.c
index 0425055..7e18fe4 100644
--- a/arch/arm64/kvm/hyp/vgic-v3-sr.c
+++ b/arch/arm64/kvm/hyp/vgic-v3-sr.c
@@ -34,7 +34,7 @@
#define write_gicreg(v,r) \
do { \
u64 __val = (v); \
- asm volatile("msr_s " __stringify(r) ", %0" : : "r" (__val));\
+ asm volatile("msr_s " __stringify(r) ", %x0" : : "rZ" (__val));\
} while (0)
static u64 __hyp_text __gic_v3_get_lr(unsigned int lr)
