Subject: [PATCH v4 2/5] KVM: PPC: Fix vmx/vsx mixup in mmio emulation

From: Fabiano Rosas <[email-masked]>
Date: Fri, 21 Jan 2022 19:26:23 -0300

The MMIO emulation code for vector instructions is duplicated between
VSX and VMX. When emulating VMX we should check the VMX copy size
instead of the VSX one.

Fixes: acc9eb9305fe ("KVM: PPC: Reimplement LOAD_VMX/STORE_VMX instruction ...")
Signed-off-by: Fabiano Rosas <[email-masked]>
Reviewed-by: Nicholas Piggin <[email-masked]>
---
 arch/powerpc/kvm/powerpc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 50414fb2a5ea..c2bd29e90314 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -1499,7 +1499,7 @@ int kvmppc_handle_vmx_load(struct kvm_vcpu *vcpu,
 {
 	enum emulation_result emulated = EMULATE_DONE;
 
-	if (vcpu->arch.mmio_vsx_copy_nums > 2)
+	if (vcpu->arch.mmio_vmx_copy_nums > 2)
 		return EMULATE_FAIL;
 
 	while (vcpu->arch.mmio_vmx_copy_nums) {
@@ -1596,7 +1596,7 @@ int kvmppc_handle_vmx_store(struct kvm_vcpu *vcpu,
 	unsigned int index = rs & KVM_MMIO_REG_MASK;
 	enum emulation_result emulated = EMULATE_DONE;
 
-	if (vcpu->arch.mmio_vsx_copy_nums > 2)
+	if (vcpu->arch.mmio_vmx_copy_nums > 2)
 		return EMULATE_FAIL;
 
 	vcpu->arch.io_gpr = rs;
-- 
2.34.1