KVM: PPC: Expand mmio_vsx_copy_type to cover VMX load/store element types

VSX MMIO emulation uses mmio_vsx_copy_type to represent VSX emulated
element size/type, such as KVMPPC_VSX_COPY_DWORD_LOAD, etc. This
patch expands mmio_vsx_copy_type to cover VMX copy type, such as
KVMPPC_VMX_COPY_BYTE(stvebx/lvebx), etc. As a result,
mmio_vsx_copy_type is also renamed to mmio_copy_type.

It is a preparation for reimplementing VMX MMIO emulation.

Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

arch/powerpc/include/asm/kvm_host.h

@@ -455,6 +455,11 @@ struct mmio_hpte_cache {
 #define KVMPPC_VSX_COPY_DWORD_LOAD_DUMP	3
 #define KVMPPC_VSX_COPY_WORD_LOAD_DUMP	4
 
+#define KVMPPC_VMX_COPY_BYTE		8
+#define KVMPPC_VMX_COPY_HWORD		9
+#define KVMPPC_VMX_COPY_WORD		10
+#define KVMPPC_VMX_COPY_DWORD		11
+
 struct openpic;
 
 /* W0 and W1 of a XIVE thread management context */
@@ -677,16 +682,16 @@ struct kvm_vcpu_arch {
 	 * Number of simulations for vsx.
 	 * If we use 2*8bytes to simulate 1*16bytes,
 	 * then the number should be 2 and
-	 * mmio_vsx_copy_type=KVMPPC_VSX_COPY_DWORD.
+	 * mmio_copy_type=KVMPPC_VSX_COPY_DWORD.
 	 * If we use 4*4bytes to simulate 1*16bytes,
 	 * the number should be 4 and
 	 * mmio_vsx_copy_type=KVMPPC_VSX_COPY_WORD.
 	 */
 	u8 mmio_vsx_copy_nums;
 	u8 mmio_vsx_offset;
-	u8 mmio_vsx_copy_type;
 	u8 mmio_vsx_tx_sx_enabled;
 	u8 mmio_vmx_copy_nums;
+	u8 mmio_copy_type;
 	u8 osi_needed;
 	u8 osi_enabled;
 	u8 papr_enabled;

arch/powerpc/kvm/emulate_loadstore.c

@@ -109,7 +109,7 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu)
 	vcpu->arch.mmio_vsx_tx_sx_enabled = get_tx_or_sx(inst);
 	vcpu->arch.mmio_vsx_copy_nums = 0;
 	vcpu->arch.mmio_vsx_offset = 0;
-	vcpu->arch.mmio_vsx_copy_type = KVMPPC_VSX_COPY_NONE;
+	vcpu->arch.mmio_copy_type = KVMPPC_VSX_COPY_NONE;
 	vcpu->arch.mmio_sp64_extend = 0;
 	vcpu->arch.mmio_sign_extend = 0;
 	vcpu->arch.mmio_vmx_copy_nums = 0;
@@ -175,17 +175,17 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu)
 
 			if (op.element_size == 8)  {
 				if (op.vsx_flags & VSX_SPLAT)
-					vcpu->arch.mmio_vsx_copy_type =
+					vcpu->arch.mmio_copy_type =
 						KVMPPC_VSX_COPY_DWORD_LOAD_DUMP;
 				else
-					vcpu->arch.mmio_vsx_copy_type =
+					vcpu->arch.mmio_copy_type =
 						KVMPPC_VSX_COPY_DWORD;
 			} else if (op.element_size == 4) {
 				if (op.vsx_flags & VSX_SPLAT)
-					vcpu->arch.mmio_vsx_copy_type =
+					vcpu->arch.mmio_copy_type =
 						KVMPPC_VSX_COPY_WORD_LOAD_DUMP;
 				else
-					vcpu->arch.mmio_vsx_copy_type =
+					vcpu->arch.mmio_copy_type =
 						KVMPPC_VSX_COPY_WORD;
 			} else
 				break;
@@ -261,10 +261,10 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu)
 				vcpu->arch.mmio_sp64_extend = 1;
 
 			if (op.element_size == 8)
-				vcpu->arch.mmio_vsx_copy_type =
+				vcpu->arch.mmio_copy_type =
 						KVMPPC_VSX_COPY_DWORD;
 			else if (op.element_size == 4)
-				vcpu->arch.mmio_vsx_copy_type =
+				vcpu->arch.mmio_copy_type =
 						KVMPPC_VSX_COPY_WORD;
 			else
 				break;

arch/powerpc/kvm/powerpc.c

@@ -1080,14 +1080,14 @@ static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 		if (vcpu->kvm->arch.kvm_ops->giveup_ext)
 			vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);
 
-		if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_DWORD)
+		if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
 			kvmppc_set_vsr_dword(vcpu, gpr);
-		else if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_WORD)
+		else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
 			kvmppc_set_vsr_word(vcpu, gpr);
-		else if (vcpu->arch.mmio_vsx_copy_type ==
+		else if (vcpu->arch.mmio_copy_type ==
 				KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
 			kvmppc_set_vsr_dword_dump(vcpu, gpr);
-		else if (vcpu->arch.mmio_vsx_copy_type ==
+		else if (vcpu->arch.mmio_copy_type ==
 				KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
 			kvmppc_set_vsr_word_dump(vcpu, gpr);
 		break;
@@ -1260,7 +1260,7 @@ static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
 	u32 dword_offset, word_offset;
 	union kvmppc_one_reg reg;
 	int vsx_offset = 0;
-	int copy_type = vcpu->arch.mmio_vsx_copy_type;
+	int copy_type = vcpu->arch.mmio_copy_type;
 	int result = 0;
 
 	switch (copy_type) {