From 16fd5c1de4f00c7887e4c715dd46872a97e30e25 Mon Sep 17 00:00:00 2001 From: James Hogan Date: Thu, 29 May 2014 10:16:31 +0100 Subject: [PATCH] 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: James Hogan Cc: Paolo Bonzini Cc: Gleb Natapov Cc: kvm@vger.kernel.org Cc: Ralf Baechle Cc: linux-mips@linux-mips.org Cc: David Daney Cc: Sanjay Lal Signed-off-by: Paolo Bonzini --- arch/mips/kvm/kvm_mips.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/mips/kvm/kvm_mips.c b/arch/mips/kvm/kvm_mips.c index 26f10fb8dcba..e4cb7cff9a28 100644 --- a/arch/mips/kvm/kvm_mips.c +++ b/arch/mips/kvm/kvm_mips.c @@ -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; -- 2.39.2