privcmd.c revision 193974072f41a843678abf5f61979c748687e66b
843e19887f64dde75055cf8842fc4db2171eff45johnlev * CDDL HEADER START
843e19887f64dde75055cf8842fc4db2171eff45johnlev * The contents of this file are subject to the terms of the
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Common Development and Distribution License (the "License").
843e19887f64dde75055cf8842fc4db2171eff45johnlev * You may not use this file except in compliance with the License.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
843e19887f64dde75055cf8842fc4db2171eff45johnlev * See the License for the specific language governing permissions
843e19887f64dde75055cf8842fc4db2171eff45johnlev * and limitations under the License.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * When distributing Covered Code, include this CDDL HEADER in each
843e19887f64dde75055cf8842fc4db2171eff45johnlev * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * If applicable, add the following below this CDDL HEADER, with the
843e19887f64dde75055cf8842fc4db2171eff45johnlev * fields enclosed by brackets "[]" replaced with your own identifying
843e19887f64dde75055cf8842fc4db2171eff45johnlev * information: Portions Copyright [yyyy] [name of copyright owner]
843e19887f64dde75055cf8842fc4db2171eff45johnlev * CDDL HEADER END
a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Use is subject to license terms.
843e19887f64dde75055cf8842fc4db2171eff45johnlev/*ARGSUSED*/
843e19887f64dde75055cf8842fc4db2171eff45johnlevprivcmd_getinfo(dev_info_t *devi, ddi_info_cmd_t cmd, void *arg, void **result)
843e19887f64dde75055cf8842fc4db2171eff45johnlevprivcmd_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
843e19887f64dde75055cf8842fc4db2171eff45johnlev S_IFCHR, PRIVCMD_MINOR, DDI_PSEUDO, 0) != DDI_SUCCESS)
843e19887f64dde75055cf8842fc4db2171eff45johnlevprivcmd_detach(dev_info_t *devi, ddi_detach_cmd_t cmd)
843e19887f64dde75055cf8842fc4db2171eff45johnlev/*ARGSUSED1*/
843e19887f64dde75055cf8842fc4db2171eff45johnlevprivcmd_open(dev_t *dev, int flag, int otyp, cred_t *cr)
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (getminor(*dev) == PRIVCMD_MINOR ? 0 : ENXIO);
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Map a contiguous set of machine frames in a foreign domain.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Used in the following way:
843e19887f64dde75055cf8842fc4db2171eff45johnlev * privcmd_mmap_t p;
843e19887f64dde75055cf8842fc4db2171eff45johnlev * privcmd_mmap_entry_t e;
843e19887f64dde75055cf8842fc4db2171eff45johnlev * addr = mmap(NULL, size, prot, MAP_SHARED, fd, 0);
843e19887f64dde75055cf8842fc4db2171eff45johnlev * p.num = number of privcmd_mmap_entry_t's
843e19887f64dde75055cf8842fc4db2171eff45johnlev * p.dom = domid;
843e19887f64dde75055cf8842fc4db2171eff45johnlev * p.entry = &e;
843e19887f64dde75055cf8842fc4db2171eff45johnlev * e.va = addr;
843e19887f64dde75055cf8842fc4db2171eff45johnlev * e.mfn = mfn;
843e19887f64dde75055cf8842fc4db2171eff45johnlev * e.npages = btopr(size);
843e19887f64dde75055cf8842fc4db2171eff45johnlev * ioctl(fd, IOCTL_PRIVCMD_MMAP, &p);
843e19887f64dde75055cf8842fc4db2171eff45johnlev/*ARGSUSED2*/
843e19887f64dde75055cf8842fc4db2171eff45johnlev int i, error = 0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev DTRACE_XPV3(mmap__start, domid_t, mmc->dom, int, mmc->num,
843e19887f64dde75055cf8842fc4db2171eff45johnlev for (umme = mmc->entry, i = 0; i < mmc->num; i++, umme++) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev DTRACE_XPV3(mmap__entry, ulong_t, mme->va, ulong_t, mme->mfn,
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Find the segment we want to mess with, then add
843e19887f64dde75055cf8842fc4db2171eff45johnlev * the mfn range to the segment.
843e19887f64dde75055cf8842fc4db2171eff45johnlev addr + mmu_ptob(mme->npages) > seg->s_base + seg->s_size)
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Set up the address range to map to an array of mfns in
843e19887f64dde75055cf8842fc4db2171eff45johnlev * a foreign domain. Used in the following way:
843e19887f64dde75055cf8842fc4db2171eff45johnlev * privcmd_mmap_batch_t p;
843e19887f64dde75055cf8842fc4db2171eff45johnlev * addr = mmap(NULL, size, prot, MAP_SHARED, fd, 0);
843e19887f64dde75055cf8842fc4db2171eff45johnlev * p.num = number of pages
843e19887f64dde75055cf8842fc4db2171eff45johnlev * p.dom = domid
843e19887f64dde75055cf8842fc4db2171eff45johnlev * p.addr = addr;
843e19887f64dde75055cf8842fc4db2171eff45johnlev * p.arr = array of mfns, indexed 0 .. p.num - 1
843e19887f64dde75055cf8842fc4db2171eff45johnlev * ioctl(fd, IOCTL_PRIVCMD_MMAPBATCH, &p);
843e19887f64dde75055cf8842fc4db2171eff45johnlev/*ARGSUSED2*/
843e19887f64dde75055cf8842fc4db2171eff45johnlevdo_privcmd_mmapbatch(void *uarg, int mode, cred_t *cr)
843e19887f64dde75055cf8842fc4db2171eff45johnlev privcmd_mmapbatch_t __mmapbatch, *mmb = &__mmapbatch;
843e19887f64dde75055cf8842fc4db2171eff45johnlev int i, error = 0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev DTRACE_XPV3(mmapbatch__start, domid_t, mmb->dom, int, mmb->num,
843e19887f64dde75055cf8842fc4db2171eff45johnlev addr + ptob(mmb->num) > seg->s_base + seg->s_size) {
a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab * This mfn is invalid and should not be added to
a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab * segmf, as we'd only cause an immediate EFAULT when
a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab * we tried to fault it in.
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (segmf_add_mfns(seg, addr, mfn, 1, mmb->dom) == 0)
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Tell the process that this MFN could not be mapped, so it
843e19887f64dde75055cf8842fc4db2171eff45johnlev * won't later try to access it.
843e19887f64dde75055cf8842fc4db2171eff45johnlev DTRACE_XPV3(mmapbatch__end, int, error, struct seg *, seg, caddr_t,
843e19887f64dde75055cf8842fc4db2171eff45johnlev/*ARGSUSED*/
843e19887f64dde75055cf8842fc4db2171eff45johnlevprivcmd_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *cr, int *rval)
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Everything is a -native- data type.
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (do_privcmd_hypercall((void *)arg, mode, cr, rval));
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (do_privcmd_mmapbatch((void *)arg, mode, cr));
843e19887f64dde75055cf8842fc4db2171eff45johnlev * The real magic happens in the segmf segment driver.
843e19887f64dde75055cf8842fc4db2171eff45johnlev/*ARGSUSED8*/
843e19887f64dde75055cf8842fc4db2171eff45johnlevprivcmd_segmap(dev_t dev, off_t off, struct as *as, caddr_t *addrp,
843e19887f64dde75055cf8842fc4db2171eff45johnlev off_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr)
843e19887f64dde75055cf8842fc4db2171eff45johnlev * User specified address
843e19887f64dde75055cf8842fc4db2171eff45johnlev * The mapping *must* be MAP_SHARED at offset 0.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * (Foreign pages are treated like device memory; the
843e19887f64dde75055cf8842fc4db2171eff45johnlev * ioctl interface allows the backing objects to be
843e19887f64dde75055cf8842fc4db2171eff45johnlev * arbitrarily redefined to point at any machine frame.)
193974072f41a843678abf5f61979c748687e66bSherry Moore 0, /* struct bus_ops */
613b28719c10e84c1202c1045df44d77767de21dRichard Bean "privcmd driver",