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/* $OpenBSD: pvbus.c,v 1.3 2015/07/23 12:08:42 reyk Exp $ */
/*
* Copyright (c) 2015 Reyk Floeter <reyk@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#if !defined(__i386__) && !defined(__amd64__)
#error pvbus(4) is currently only supported on i386 and amd64
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/timeout.h>
#include <sys/signalvar.h>
#include <sys/syslog.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <machine/specialreg.h>
#include <dev/rndvar.h>
#include <dev/pv/pvvar.h>
#include <dev/pv/pvreg.h>
#include "vmt.h"
int has_hv_cpuid = 0;
extern void rdrand(void *);
int pvbus_activate(struct device *, int);
int pvbus_match(struct device *, void *, void *);
void pvbus_attach(struct device *, struct device *, void *);
int pvbus_print(void *, const char *);
int pvbus_search(struct device *, void *, void *);
struct cfattach pvbus_ca = {
sizeof(struct pvbus_softc),
pvbus_match,
pvbus_attach,
NULL,
pvbus_activate
};
struct cfdriver pvbus_cd = {
NULL,
"pvbus",
DV_DULL
};
struct pvbus_type {
const char *signature;
const char *name;
unsigned int type;
} pvbus_types[] = {
{ "KVMKVMKVM\0\0\0", "KVM", PVBUS_KVM },
{ "Microsoft Hv", "Hyper-V", PVBUS_HYPERV },
{ "VMwareVMware", "VMware", PVBUS_VMWARE },
{ "XenVMMXenVMM", "Xen", PVBUS_XEN },
{ "bhyve bhyve ", "bhyve", PVBUS_BHYVE },
{ NULL }
};
int
pvbus_probe(void)
{
/* Must be set in identcpu */
if (!has_hv_cpuid)
return (0);
return (1);
}
int
pvbus_match(struct device *parent, void *match, void *aux)
{
const char **busname = (const char **)aux;
return (strcmp(*busname, pvbus_cd.cd_name) == 0);
}
void
pvbus_attach(struct device *parent, struct device *self, void *aux)
{
struct pvbus_softc *sc = (struct pvbus_softc *)self;
uint32_t reg0, base;
union {
uint32_t regs[3];
char str[CPUID_HV_SIGNATURE_STRLEN];
} r;
int i;
printf(":");
for (base = CPUID_HV_SIGNATURE_START;
base < CPUID_HV_SIGNATURE_END;
base += CPUID_HV_SIGNATURE_STEP) {
CPUID(base, reg0, r.regs[0], r.regs[1], r.regs[2]);
for (i = 0; i < 4; i++) {
/*
* Check if first 4 chars are printable ASCII as
* minimal validity check
*/
if (r.str[i] < 32 || r.str[i] > 126)
goto out;
}
for (i = 0; pvbus_types[i].signature != NULL; i++) {
if (memcmp(pvbus_types[i].signature, r.str,
CPUID_HV_SIGNATURE_STRLEN) != 0)
continue;
sc->pvbus_types |= pvbus_types[i].type;
printf(" %s", pvbus_types[i].name);
}
}
out:
printf("\n");
#ifdef notyet
/* XXX get hypervisor-specific features */
if (sc->pvbus_types & PVBUS_KVM) {
kvm_cpuid_base = base;
CPUID(base + CPUID_OFFSET_KVM_FEATURES,
reg0, r.regs[0], r.regs[1], r.regs[2]);
kvm_features = reg0;
}
if (sc->pvbus_types & PVBUS_HYPERV) {
/* XXX */
}
#endif
config_search(pvbus_search, self, sc);
}
int
pvbus_activate(struct device *self, int act)
{
int rv = 0;
switch (act) {
case DVACT_SUSPEND:
rv = config_activate_children(self, act);
break;
case DVACT_RESUME:
rv = config_activate_children(self, act);
break;
case DVACT_POWERDOWN:
rv = config_activate_children(self, act);
break;
default:
rv = config_activate_children(self, act);
break;
}
return (rv);
}
int
pvbus_search(struct device *parent, void *arg, void *aux)
{
struct pvbus_softc *sc = (struct pvbus_softc *)aux;
struct cfdata *cf = arg;
struct pv_attach_args pva;
pva.pva_busname = cf->cf_driver->cd_name;
pva.pva_types = sc->pvbus_types;
if (cf->cf_attach->ca_match(parent, cf, &pva) > 0)
config_attach(parent, cf, &pva, pvbus_print);
return (0);
}
int
pvbus_print(void *aux, const char *pnp)
{
struct pv_attach_args *pva = aux;
if (pnp)
printf("%s at %s", pva->pva_busname, pnp);
return (UNCONF);
}
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