diff mbox

[06/11] KVM: PPC: add KVMPPC_VSX_COPY_WORD_LOAD_DUMP type support for mmio emulation

Message ID 1524657284-16706-7-git-send-email-wei.guo.simon@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

simon April 25, 2018, 11:54 a.m. UTC 
From: Simon Guo <wei.guo.simon@gmail.com>

Some VSX instruction like lxvwsx will splat word into VSR. This patch
adds VSX copy type KVMPPC_VSX_COPY_WORD_LOAD_DUMP to support this.

Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
 arch/powerpc/include/asm/kvm_host.h |  1 +
 arch/powerpc/kvm/powerpc.c          | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+)

Comments

Paul Mackerras May 3, 2018, 5:59 a.m. UTC | #1 
On Wed, Apr 25, 2018 at 07:54:39PM +0800, wei.guo.simon@gmail.com wrote:
> From: Simon Guo <wei.guo.simon@gmail.com>
> 
> Some VSX instruction like lxvwsx will splat word into VSR. This patch
> adds VSX copy type KVMPPC_VSX_COPY_WORD_LOAD_DUMP to support this.
> 
> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>

Reviewed-by: Paul Mackerras <paulus@ozlabs.org>
diff mbox

Patch

diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 1c7da00..db7e25d 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -454,6 +454,7 @@  struct mmio_hpte_cache {
 #define KVMPPC_VSX_COPY_WORD		1
 #define KVMPPC_VSX_COPY_DWORD		2
 #define KVMPPC_VSX_COPY_DWORD_LOAD_DUMP	3
+#define KVMPPC_VSX_COPY_WORD_LOAD_DUMP	4
 
 struct openpic;
 
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index f7fd68f..17f0315 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -907,6 +907,26 @@  static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
 	}
 }
 
+static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
+	u32 gpr)
+{
+	union kvmppc_one_reg val;
+	int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
+
+	if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
+		val.vsx32val[0] = gpr;
+		val.vsx32val[1] = gpr;
+		val.vsx32val[2] = gpr;
+		val.vsx32val[3] = gpr;
+		VCPU_VSX_VR(vcpu, index) = val.vval;
+	} else {
+		val.vsx32val[0] = gpr;
+		val.vsx32val[1] = gpr;
+		VCPU_VSX_FPR(vcpu, index, 0) = val.vsxval[0];
+		VCPU_VSX_FPR(vcpu, index, 1) = val.vsxval[0];
+	}
+}
+
 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
 	u32 gpr32)
 {
@@ -1061,6 +1081,9 @@  static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 		else if (vcpu->arch.mmio_vsx_copy_type ==
 				KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
 			kvmppc_set_vsr_dword_dump(vcpu, gpr);
+		else if (vcpu->arch.mmio_vsx_copy_type ==
+				KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
+			kvmppc_set_vsr_word_dump(vcpu, gpr);
 		break;
 #endif
 #ifdef CONFIG_ALTIVEC