KVM: PPC: Book3S: Add MMIO emulation for FP and VSX instructions

This patch provides the MMIO load/store emulation for instructions
of 'double & vector unsigned char & vector signed char & vector
unsigned short & vector signed short & vector unsigned int & vector
signed int & vector double '.

The instructions that this adds emulation for are:

- ldx, ldux, lwax,
- lfs, lfsx, lfsu, lfsux, lfd, lfdx, lfdu, lfdux,
- stfs, stfsx, stfsu, stfsux, stfd, stfdx, stfdu, stfdux, stfiwx,
- lxsdx, lxsspx, lxsiwax, lxsiwzx, lxvd2x, lxvw4x, lxvdsx,
- stxsdx, stxsspx, stxsiwx, stxvd2x, stxvw4x

[paulus@ozlabs.org - some cleanups, fixes and rework, make it
 compile for Book E, fix build when PR KVM is built in]

Signed-off-by: Bin Lu <lblulb@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 01d05c76f1c7..2acc691ed9d0 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -438,6 +438,11 @@ struct mmio_hpte_cache {
 	unsigned int index;
 };
 
+#define KVMPPC_VSX_COPY_NONE		0
+#define KVMPPC_VSX_COPY_WORD		1
+#define KVMPPC_VSX_COPY_DWORD		2
+#define KVMPPC_VSX_COPY_DWORD_LOAD_DUMP	3
+
 struct openpic;
 
 struct kvm_vcpu_arch {
@@ -641,6 +646,21 @@ struct kvm_vcpu_arch {
 	u8 io_gpr; /* GPR used as IO source/target */
 	u8 mmio_host_swabbed;
 	u8 mmio_sign_extend;
+	/* conversion between single and double precision */
+	u8 mmio_sp64_extend;
+	/*
+	 * 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.
+	 * 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 osi_needed;
 	u8 osi_enabled;
 	u8 papr_enabled;
@@ -729,6 +749,8 @@ struct kvm_vcpu_arch {
 };
 
 #define VCPU_FPR(vcpu, i)	(vcpu)->arch.fp.fpr[i][TS_FPROFFSET]
+#define VCPU_VSX_FPR(vcpu, i, j)	((vcpu)->arch.fp.fpr[i][j])
+#define VCPU_VSX_VR(vcpu, i)		((vcpu)->arch.vr.vr[i])
 
 /* Values for vcpu->arch.state */
 #define KVMPPC_VCPU_NOTREADY		0
@@ -742,6 +764,7 @@ struct kvm_vcpu_arch {
 #define KVM_MMIO_REG_FPR	0x0020
 #define KVM_MMIO_REG_QPR	0x0040
 #define KVM_MMIO_REG_FQPR	0x0060
+#define KVM_MMIO_REG_VSX	0x0080
 
 #define __KVM_HAVE_ARCH_WQP
 #define __KVM_HAVE_CREATE_DEVICE