KVM: arm64: Fix {fp_asimd,sve}_exit_stat manipulation

virt inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I65EGT
CVE: NA

----------------------------------------------------

Currently fp_asimd_exit_stat is accumulated for *both* FP/ASIMD and SVE
traps so that user can not distinguish between these two via debugfs.

Fix the manipulation for both exception classes.
Signed-off-by: NZenghui Yu <yuzenghui@huawei.com>
Reviewed-by: NKeqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/arm64/kvm/hyp/include/hyp/switch.h

@@ -223,7 +223,11 @@ static inline bool __hyp_handle_fpsimd(struct kvm_vcpu *vcpu)
 	    esr_ec != ESR_ELx_EC_SVE)
 		return false;
 
-	vcpu->stat.fp_asimd_exit_stat++;
+	if (esr_ec == ESR_ELx_EC_FP_ASIMD)
+		vcpu->stat.fp_asimd_exit_stat++;
+	else	/* SVE trap */
+		vcpu->stat.sve_exit_stat++;
+
 	/* Don't handle SVE traps for non-SVE vcpus here: */
 	if (!sve_guest)
 		if (esr_ec != ESR_ELx_EC_FP_ASIMD)