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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <sys/types.h>
#include <sys/file.h>
#include <sys/errno.h>
#include <sys/open.h>
#include <sys/cred.h>
#include <sys/conf.h>
#include <sys/stat.h>
#include <sys/processor.h>
#include <sys/cpuvar.h>
#include <sys/kmem.h>
#include <sys/modctl.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/auxv.h>
#include <sys/cpuid_drv.h>
#include <sys/systeminfo.h>
#if defined(__x86)
#include <sys/x86_archext.h>
#endif
static dev_info_t *cpuid_devi;
/*ARGSUSED*/
static int
cpuid_getinfo(dev_info_t *devi, ddi_info_cmd_t cmd, void *arg, void **result)
{
switch (cmd) {
case DDI_INFO_DEVT2DEVINFO:
case DDI_INFO_DEVT2INSTANCE:
break;
default:
return (DDI_FAILURE);
}
switch (getminor((dev_t)arg)) {
case CPUID_SELF_CPUID_MINOR:
break;
default:
return (DDI_FAILURE);
}
if (cmd == DDI_INFO_DEVT2INSTANCE)
*result = 0;
else
*result = cpuid_devi;
return (DDI_SUCCESS);
}
static int
cpuid_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
{
if (cmd != DDI_ATTACH)
return (DDI_FAILURE);
cpuid_devi = devi;
return (ddi_create_minor_node(devi, CPUID_DRIVER_SELF_NODE, S_IFCHR,
CPUID_SELF_CPUID_MINOR, DDI_PSEUDO, 0));
}
static int
cpuid_detach(dev_info_t *devi, ddi_detach_cmd_t cmd)
{
if (cmd != DDI_DETACH)
return (DDI_FAILURE);
ddi_remove_minor_node(devi, NULL);
cpuid_devi = NULL;
return (DDI_SUCCESS);
}
/*ARGSUSED1*/
static int
cpuid_open(dev_t *dev, int flag, int otyp, cred_t *cr)
{
return (getminor(*dev) == CPUID_SELF_CPUID_MINOR ? 0 : ENXIO);
}
#if defined(_HAVE_CPUID_INSN)
/*ARGSUSED*/
static int
cpuid_read(dev_t dev, uio_t *uio, cred_t *cr)
{
struct cpuid_regs crs;
int error = 0;
if (!is_x86_feature(x86_featureset, X86FSET_CPUID))
return (ENXIO);
if (uio->uio_resid & (sizeof (crs) - 1))
return (EINVAL);
while (uio->uio_resid > 0) {
u_offset_t uoff;
if ((uoff = (u_offset_t)uio->uio_loffset) > UINT_MAX) {
error = EINVAL;
break;
}
crs.cp_eax = (uint32_t)uoff;
crs.cp_ebx = crs.cp_ecx = crs.cp_edx = 0;
(void) cpuid_insn(NULL, &crs);
if ((error = uiomove(&crs, sizeof (crs), UIO_READ, uio)) != 0)
break;
uio->uio_loffset = uoff + 1;
}
return (error);
}
#else
#define cpuid_read nodev
#endif /* _HAVE_CPUID_INSN */
/*ARGSUSED*/
static int
cpuid_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *cr, int *rval)
{
char areq[16];
void *ustr;
switch (cmd) {
case CPUID_GET_HWCAP: {
STRUCT_DECL(cpuid_get_hwcap, h);
STRUCT_INIT(h, mode);
if (ddi_copyin((void *)arg,
STRUCT_BUF(h), STRUCT_SIZE(h), mode))
return (EFAULT);
if ((ustr = STRUCT_FGETP(h, cgh_archname)) != NULL &&
copyinstr(ustr, areq, sizeof (areq), NULL) != 0)
return (EFAULT);
areq[sizeof (areq) - 1] = '\0';
if (strcmp(areq, architecture) == 0)
STRUCT_FSET(h, cgh_hwcap, auxv_hwcap);
#if defined(_SYSCALL32_IMPL)
else if (strcmp(areq, architecture_32) == 0)
STRUCT_FSET(h, cgh_hwcap, auxv_hwcap32);
#endif
else
STRUCT_FSET(h, cgh_hwcap, 0);
if (ddi_copyout(STRUCT_BUF(h),
(void *)arg, STRUCT_SIZE(h), mode))
return (EFAULT);
return (0);
}
default:
return (ENOTTY);
}
}
static struct cb_ops cpuid_cb_ops = {
cpuid_open,
nulldev, /* close */
nodev, /* strategy */
nodev, /* print */
nodev, /* dump */
cpuid_read,
nodev, /* write */
cpuid_ioctl,
nodev, /* devmap */
nodev, /* mmap */
nodev, /* segmap */
nochpoll, /* poll */
ddi_prop_op,
NULL,
D_64BIT | D_NEW | D_MP
};
static struct dev_ops cpuid_dv_ops = {
DEVO_REV,
0,
cpuid_getinfo,
nulldev, /* identify */
nulldev, /* probe */
cpuid_attach,
cpuid_detach,
nodev, /* reset */
&cpuid_cb_ops,
(struct bus_ops *)0,
NULL,
ddi_quiesce_not_needed, /* quiesce */
};
static struct modldrv modldrv = {
&mod_driverops,
"cpuid driver",
&cpuid_dv_ops
};
static struct modlinkage modl = {
MODREV_1,
&modldrv
};
int
_init(void)
{
return (mod_install(&modl));
}
int
_fini(void)
{
return (mod_remove(&modl));
}
int
_info(struct modinfo *modinfo)
{
return (mod_info(&modl, modinfo));
}
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