diff options
Diffstat (limited to 'kvm.c')
| -rw-r--r-- | kvm.c | 140 |
1 files changed, 140 insertions, 0 deletions
@@ -0,0 +1,140 @@ +/* + * Support for decoding of KVM_* ioctl commands. + * + * Copyright (c) 2017 Masatake YAMATO <yamato@redhat.com> + * Copyright (c) 2017 Red Hat, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "defs.h" + +#ifdef HAVE_LINUX_KVM_H +# include <linux/kvm.h> +# include "print_fields.h" +# include "arch_kvm.c" + +static int +kvm_ioctl_create_vcpu(struct tcb *const tcp, const kernel_ulong_t arg) +{ + uint32_t cpuid = arg; + + tprintf(", %u", cpuid); + return RVAL_IOCTL_DECODED | RVAL_FD; +} + +# ifdef HAVE_STRUCT_KVM_USERSPACE_MEMORY_REGION +# include "xlat/kvm_mem_flags.h" +static int +kvm_ioctl_set_user_memory_region(struct tcb *const tcp, const kernel_ulong_t arg) +{ + struct kvm_userspace_memory_region u_memory_region; + + tprints(", "); + if (umove_or_printaddr(tcp, arg, &u_memory_region)) + return RVAL_IOCTL_DECODED; + + PRINT_FIELD_U("{", u_memory_region, slot); + PRINT_FIELD_FLAGS(", ", u_memory_region, flags, kvm_mem_flags, + "KVM_MEM_???"); + PRINT_FIELD_X(", ", u_memory_region, guest_phys_addr); + PRINT_FIELD_U(", ", u_memory_region, memory_size); + PRINT_FIELD_X(", ", u_memory_region, userspace_addr); + tprints("}"); + + return RVAL_IOCTL_DECODED; +} +# endif /* HAVE_STRUCT_KVM_USERSPACE_MEMORY_REGION */ + +# ifdef HAVE_STRUCT_KVM_REGS +static int +kvm_ioctl_decode_regs(struct tcb *const tcp, const unsigned int code, + const kernel_ulong_t arg) +{ + struct kvm_regs regs; + + if (code == KVM_GET_REGS && entering(tcp)) + return 0; + + tprints(", "); + if (!umove_or_printaddr(tcp, arg, ®s)) + arch_print_kvm_regs(tcp, arg, ®s); + + return RVAL_IOCTL_DECODED; +} +# endif /* HAVE_STRUCT_KVM_REGS */ + +# ifdef HAVE_STRUCT_KVM_SREGS +static int +kvm_ioctl_decode_sregs(struct tcb *const tcp, const unsigned int code, + const kernel_ulong_t arg) +{ + struct kvm_sregs sregs; + + if (code == KVM_GET_SREGS && entering(tcp)) + return 0; + + tprints(", "); + if (!umove_or_printaddr(tcp, arg, &sregs)) + arch_print_kvm_sregs(tcp, arg, &sregs); + + return RVAL_IOCTL_DECODED; +} +# endif /* HAVE_STRUCT_KVM_SREGS */ + +int +kvm_ioctl(struct tcb *const tcp, const unsigned int code, const kernel_ulong_t arg) +{ + switch (code) { + case KVM_CREATE_VCPU: + return kvm_ioctl_create_vcpu(tcp, arg); + +# ifdef HAVE_STRUCT_KVM_USERSPACE_MEMORY_REGION + case KVM_SET_USER_MEMORY_REGION: + return kvm_ioctl_set_user_memory_region(tcp, arg); +# endif + +# ifdef HAVE_STRUCT_KVM_REGS + case KVM_SET_REGS: + case KVM_GET_REGS: + return kvm_ioctl_decode_regs(tcp, code, arg); +# endif + +# ifdef HAVE_STRUCT_KVM_SREGS + case KVM_SET_SREGS: + case KVM_GET_SREGS: + return kvm_ioctl_decode_sregs(tcp, code, arg); +# endif + + case KVM_CREATE_VM: + return RVAL_DECODED | RVAL_FD; + case KVM_RUN: + case KVM_GET_VCPU_MMAP_SIZE: + case KVM_GET_API_VERSION: + default: + return RVAL_DECODED; + } +} + +#endif /* HAVE_LINUX_KVM_H */ |