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KVM: MIPS: Add callback to check extension 

Add an implementation callback for checking presence of KVM extensions.
This allows implementation specific extensions to be provided without
ifdefs in mips.c.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
This commit is contained in:
James Hogan 2017-03-14 10:15:22 +00:00
parent a517c1ad65
commit 607ef2fdeb
3 changed files with 19 additions and 2 deletions
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1
arch/mips/include/asm/kvm_host.h
View File

@ -542,6 +542,7 @@ struct kvm_mips_callbacks {
int (*handle_msa_fpe)(struct kvm_vcpu *vcpu);
int (*handle_fpe)(struct kvm_vcpu *vcpu);
int (*handle_msa_disabled)(struct kvm_vcpu *vcpu);
int (*check_extension)(struct kvm *kvm, long ext);
int (*vcpu_init)(struct kvm_vcpu *vcpu);
void (*vcpu_uninit)(struct kvm_vcpu *vcpu);
int (*vcpu_setup)(struct kvm_vcpu *vcpu);

3
arch/mips/kvm/mips.c
View File

@ -1043,7 +1043,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_READONLY_MEM:
case KVM_CAP_SYNC_MMU:
case KVM_CAP_IMMEDIATE_EXIT:
case KVM_CAP_MIPS_TE:
r = 1;
break;
case KVM_CAP_COALESCED_MMIO:
@ -1075,7 +1074,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = cpu_has_msa && !(boot_cpu_data.msa_id & MSA_IR_WRPF);
break;
default:
r = 0;
r = kvm_mips_callbacks->check_extension(kvm, ext);
break;
}
return r;

17
arch/mips/kvm/trap_emul.c
View File

@ -488,6 +488,22 @@ static int kvm_trap_emul_handle_msa_disabled(struct kvm_vcpu *vcpu)
return ret;
}
static int kvm_trap_emul_check_extension(struct kvm *kvm, long ext)
{
int r;
switch (ext) {
case KVM_CAP_MIPS_TE:
r = 1;
break;
default:
r = 0;
break;
}
return r;
}
static int kvm_trap_emul_vcpu_init(struct kvm_vcpu *vcpu)
{
struct mm_struct *kern_mm = &vcpu->arch.guest_kernel_mm;
@ -1238,6 +1254,7 @@ static struct kvm_mips_callbacks kvm_trap_emul_callbacks = {
.handle_fpe = kvm_trap_emul_handle_fpe,
.handle_msa_disabled = kvm_trap_emul_handle_msa_disabled,
.check_extension = kvm_trap_emul_check_extension,
.vcpu_init = kvm_trap_emul_vcpu_init,
.vcpu_uninit = kvm_trap_emul_vcpu_uninit,
.vcpu_setup = kvm_trap_emul_vcpu_setup,