hw/s390x/pv.c

   1 /*
   2  * Protected Virtualization functions
   3  *
   4  * Copyright IBM Corp. 2020
   5  * Author(s):
   6  *  Janosch Frank <frankja@linux.ibm.com>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   9  * your option) any later version. See the COPYING file in the top-level
  10  * directory.
  11  */
  12 #include "qemu/osdep.h"
  13
  14 #include <linux/kvm.h>
  15
  16 #include "qemu/error-report.h"
  17 #include "sysemu/kvm.h"
  18 #include "hw/s390x/pv.h"
  19
  20 static int __s390_pv_cmd(uint32_t cmd, const char *cmdname, void *data)
  21 {
  22     struct kvm_pv_cmd pv_cmd = {
  23         .cmd = cmd,
  24         .data = (uint64_t)data,
  25     };
  26     int rc = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd);
  27
  28     if (rc) {
  29         error_report("KVM PV command %d (%s) failed: header rc %x rrc %x "
  30                      "IOCTL rc: %d", cmd, cmdname, pv_cmd.rc, pv_cmd.rrc,
  31                      rc);
  32     }
  33     return rc;
  34 }
  35
  36 /*
  37  * This macro lets us pass the command as a string to the function so
  38  * we can print it on an error.
  39  */
  40 #define s390_pv_cmd(cmd, data) __s390_pv_cmd(cmd, #cmd, data);
  41 #define s390_pv_cmd_exit(cmd, data)    \
  42 {                                      \
  43     int rc;                            \
  44                                        \
  45     rc = __s390_pv_cmd(cmd, #cmd, data);\
  46     if (rc) {                          \
  47         exit(1);                       \
  48     }                                  \
  49 }
  50
  51 int s390_pv_vm_enable(void)
  52 {
  53     return s390_pv_cmd(KVM_PV_ENABLE, NULL);
  54 }
  55
  56 void s390_pv_vm_disable(void)
  57 {
  58      s390_pv_cmd_exit(KVM_PV_DISABLE, NULL);
  59 }
  60
  61 int s390_pv_set_sec_parms(uint64_t origin, uint64_t length)
  62 {
  63     struct kvm_s390_pv_sec_parm args = {
  64         .origin = origin,
  65         .length = length,
  66     };
  67
  68     return s390_pv_cmd(KVM_PV_SET_SEC_PARMS, &args);
  69 }
  70
  71 /*
  72  * Called for each component in the SE type IPL parameter block 0.
  73  */
  74 int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak)
  75 {
  76     struct kvm_s390_pv_unp args = {
  77         .addr = addr,
  78         .size = size,
  79         .tweak = tweak,
  80     };
  81
  82     return s390_pv_cmd(KVM_PV_UNPACK, &args);
  83 }
  84
  85 void s390_pv_perf_clear_reset(void)
  86 {
  87     s390_pv_cmd_exit(KVM_PV_PREP_RESET, NULL);
  88 }
  89
  90 int s390_pv_verify(void)
  91 {
  92     return s390_pv_cmd(KVM_PV_VERIFY, NULL);
  93 }
  94
  95 void s390_pv_unshare(void)
  96 {
  97     s390_pv_cmd_exit(KVM_PV_UNSHARE_ALL, NULL);
  98 }