arch/mips/kvm/kvm_mips_commpage.c

   1 /*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * commpage, currently used for Virtual COP0 registers.
   7 * Mapped into the guest kernel @ 0x0.
   8 *
   9 * Copyright (C) 2012  MIPS Technologies, Inc.  All rights reserved.
  10 * Authors: Sanjay Lal <sanjayl@kymasys.com>
  11 */
  12
  13 #include <linux/errno.h>
  14 #include <linux/err.h>
  15 #include <linux/module.h>
  16 #include <linux/vmalloc.h>
  17 #include <linux/fs.h>
  18 #include <linux/bootmem.h>
  19 #include <asm/page.h>
  20 #include <asm/cacheflush.h>
  21 #include <asm/mmu_context.h>
  22
  23 #include <linux/kvm_host.h>
  24
  25 #include "kvm_mips_comm.h"
  26
  27 void kvm_mips_commpage_init(struct kvm_vcpu *vcpu)
  28 {
  29         struct kvm_mips_commpage *page = vcpu->arch.kseg0_commpage;
  30         memset(page, 0, sizeof(struct kvm_mips_commpage));
  31
  32         /* Specific init values for fields */
  33         vcpu->arch.cop0 = &page->cop0;
  34         memset(vcpu->arch.cop0, 0, sizeof(struct mips_coproc));
  35
  36         return;
  37 }