MIPS: KVM: Add base guest MSA support

[linux-2.6-block.git] / arch / mips / include / asm / kvm_host.h

diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index fb264d8695e4fe6ff33879a2a8943f797bf448d1..1dc0dca15cbd746962f2184e224902bb389c5454 100644 (file)
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -360,6 +360,7 @@ struct kvm_mips_tlb {
 };
 
 #define KVM_MIPS_FPU_FPU       0x1
+#define KVM_MIPS_FPU_MSA       0x2
 
 #define KVM_MIPS_GUEST_TLB_SIZE        64
 struct kvm_vcpu_arch {
@@ -432,6 +433,7 @@ struct kvm_vcpu_arch {
        int wait;
 
        u8 fpu_enabled;
+       u8 msa_enabled;
 };
 
 
@@ -576,6 +578,18 @@ static inline bool kvm_mips_guest_has_fpu(struct kvm_vcpu_arch *vcpu)
                kvm_read_c0_guest_config1(vcpu->cop0) & MIPS_CONF1_FP;
 }
 
+static inline bool kvm_mips_guest_can_have_msa(struct kvm_vcpu_arch *vcpu)
+{
+       return (!__builtin_constant_p(cpu_has_msa) || cpu_has_msa) &&
+               vcpu->msa_enabled;
+}
+
+static inline bool kvm_mips_guest_has_msa(struct kvm_vcpu_arch *vcpu)
+{
+       return kvm_mips_guest_can_have_msa(vcpu) &&
+               kvm_read_c0_guest_config3(vcpu->cop0) & MIPS_CONF3_MSA;
+}
+
 struct kvm_mips_callbacks {
        int (*handle_cop_unusable)(struct kvm_vcpu *vcpu);
        int (*handle_tlb_mod)(struct kvm_vcpu *vcpu);
@@ -619,11 +633,16 @@ int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu);
 /* Trampoline ASM routine to start running in "Guest" context */
 extern int __kvm_mips_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu);
 
-/* FPU context management */
+/* FPU/MSA context management */
 void __kvm_save_fpu(struct kvm_vcpu_arch *vcpu);
 void __kvm_restore_fpu(struct kvm_vcpu_arch *vcpu);
 void __kvm_restore_fcsr(struct kvm_vcpu_arch *vcpu);
+void __kvm_save_msa(struct kvm_vcpu_arch *vcpu);
+void __kvm_restore_msa(struct kvm_vcpu_arch *vcpu);
+void __kvm_restore_msa_upper(struct kvm_vcpu_arch *vcpu);
+void __kvm_restore_msacsr(struct kvm_vcpu_arch *vcpu);
 void kvm_own_fpu(struct kvm_vcpu *vcpu);
+void kvm_own_msa(struct kvm_vcpu *vcpu);
 void kvm_drop_fpu(struct kvm_vcpu *vcpu);
 void kvm_lose_fpu(struct kvm_vcpu *vcpu);