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/*
* Protected Virtualization functions
*
* Copyright IBM Corp. 2020
* Author(s):
* Janosch Frank <frankja@linux.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at
* your option) any later version. See the COPYING file in the top-level
* directory.
*/
#include "qemu/osdep.h"
#include <linux/kvm.h>
#include "cpu.h"
#include "qemu/error-report.h"
#include "sysemu/kvm.h"
#include "hw/s390x/ipl.h"
#include "hw/s390x/pv.h"
static int __s390_pv_cmd(uint32_t cmd, const char *cmdname, void *data)
{
struct kvm_pv_cmd pv_cmd = {
.cmd = cmd,
.data = (uint64_t)data,
};
int rc;
do {
rc = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd);
} while (rc == -EINTR);
if (rc) {
error_report("KVM PV command %d (%s) failed: header rc %x rrc %x "
"IOCTL rc: %d", cmd, cmdname, pv_cmd.rc, pv_cmd.rrc,
rc);
}
return rc;
}
/*
* This macro lets us pass the command as a string to the function so
* we can print it on an error.
*/
#define s390_pv_cmd(cmd, data) __s390_pv_cmd(cmd, #cmd, data);
#define s390_pv_cmd_exit(cmd, data) \
{ \
int rc; \
\
rc = __s390_pv_cmd(cmd, #cmd, data);\
if (rc) { \
exit(1); \
} \
}
int s390_pv_vm_enable(void)
{
return s390_pv_cmd(KVM_PV_ENABLE, NULL);
}
void s390_pv_vm_disable(void)
{
s390_pv_cmd_exit(KVM_PV_DISABLE, NULL);
}
int s390_pv_set_sec_parms(uint64_t origin, uint64_t length)
{
struct kvm_s390_pv_sec_parm args = {
.origin = origin,
.length = length,
};
return s390_pv_cmd(KVM_PV_SET_SEC_PARMS, &args);
}
/*
* Called for each component in the SE type IPL parameter block 0.
*/
int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak)
{
struct kvm_s390_pv_unp args = {
.addr = addr,
.size = size,
.tweak = tweak,
};
return s390_pv_cmd(KVM_PV_UNPACK, &args);
}
void s390_pv_prep_reset(void)
{
s390_pv_cmd_exit(KVM_PV_PREP_RESET, NULL);
}
int s390_pv_verify(void)
{
return s390_pv_cmd(KVM_PV_VERIFY, NULL);
}
void s390_pv_unshare(void)
{
s390_pv_cmd_exit(KVM_PV_UNSHARE_ALL, NULL);
}
void s390_pv_inject_reset_error(CPUState *cs)
{
int r1 = (cs->kvm_run->s390_sieic.ipa & 0x00f0) >> 4;
CPUS390XState *env = &S390_CPU(cs)->env;
/* Report that we are unable to enter protected mode */
env->regs[r1 + 1] = DIAG_308_RC_INVAL_FOR_PV;
}
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