Commit 16fd5c1d authored by James Hogan's avatar James Hogan Committed by Paolo Bonzini
Browse files

MIPS: KVM: Add CP0_HWREna KVM register access 



Implement KVM_{GET,SET}_ONE_REG ioctl based access to the guest CP0
HWREna register. This is so that userland can save and restore its
value so that RDHWR instructions don't have to be emulated by the guest.

Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: kvm@vger.kernel.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: David Daney <david.daney@cavium.com>
Cc: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 7767b7d2

arch/mips/kvm/kvm_mips.c

+7 −0
Original line number Diff line number Diff line
@@ -529,6 +529,7 @@ static u64 kvm_mips_get_one_regs[] = { 
	KVM_REG_MIPS_CP0_USERLOCAL,

	KVM_REG_MIPS_CP0_PAGEMASK,

	KVM_REG_MIPS_CP0_WIRED,

	KVM_REG_MIPS_CP0_HWRENA,

	KVM_REG_MIPS_CP0_BADVADDR,

	KVM_REG_MIPS_CP0_COUNT,

	KVM_REG_MIPS_CP0_ENTRYHI,
@@ -580,6 +581,9 @@ static int kvm_mips_get_reg(struct kvm_vcpu *vcpu, 
	case KVM_REG_MIPS_CP0_WIRED:

		v = (long)kvm_read_c0_guest_wired(cop0);

		break;

	case KVM_REG_MIPS_CP0_HWRENA:

		v = (long)kvm_read_c0_guest_hwrena(cop0);

		break;

	case KVM_REG_MIPS_CP0_BADVADDR:

		v = (long)kvm_read_c0_guest_badvaddr(cop0);

		break;
@@ -691,6 +695,9 @@ static int kvm_mips_set_reg(struct kvm_vcpu *vcpu, 
	case KVM_REG_MIPS_CP0_WIRED:

		kvm_write_c0_guest_wired(cop0, v);

		break;

	case KVM_REG_MIPS_CP0_HWRENA:

		kvm_write_c0_guest_hwrena(cop0, v);

		break;

	case KVM_REG_MIPS_CP0_BADVADDR:

		kvm_write_c0_guest_badvaddr(cop0, v);

		break;

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