Differential D8290 Diff 25078 usr.sbin/bhyve/pci_passthru.c

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usr.sbin/bhyve/pci_passthru.c

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*		*
* $FreeBSD$		* $FreeBSD$
*/		*/

#include <sys/cdefs.h>		#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");		__FBSDID("$FreeBSD$");

#include <sys/param.h>		#include <sys/param.h>
		#ifndef WITHOUT_CAPSICUM
		#include <sys/capsicum.h>
		#endif
#include <sys/types.h>		#include <sys/types.h>
#include <sys/mman.h>		#include <sys/mman.h>
#include <sys/pciio.h>		#include <sys/pciio.h>
#include <sys/ioctl.h>		#include <sys/ioctl.h>

#include <dev/io/iodev.h>		#include <dev/io/iodev.h>
#include <dev/pci/pcireg.h>		#include <dev/pci/pcireg.h>

#include <machine/iodev.h>		#include <machine/iodev.h>

#include <stdio.h>		#include <stdio.h>
#include <stdlib.h>		#include <stdlib.h>
#include <string.h>		#include <string.h>
#include <err.h>		#include <err.h>
		#include <errno.h>
#include <fcntl.h>		#include <fcntl.h>
		#include <sysexits.h>
#include <unistd.h>		#include <unistd.h>

#include <machine/vmm.h>		#include <machine/vmm.h>
#include <vmmapi.h>		#include <vmmapi.h>
#include "pci_emul.h"		#include "pci_emul.h"
#include "mem.h"		#include "mem.h"

#ifndef _PATH_DEVPCI		#ifndef _PATH_DEVPCI
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return (error);		return (error);
}		}

static int		static int
passthru_init(struct vmctx ctx, struct pci_devinst pi, char *opts)		passthru_init(struct vmctx ctx, struct pci_devinst pi, char *opts)
{		{
int bus, slot, func, error, memflags;		int bus, slot, func, error, memflags;
struct passthru_softc *sc;		struct passthru_softc *sc;
		#ifndef WITHOUT_CAPSICUM
		cap_rights_t rights;
		cap_ioctl_t pci_ioctls[] = { PCIOCREAD, PCIOCWRITE, PCIOCGETBAR };
		cap_ioctl_t io_ioctls[] = { IODEV_PIO };
		#endif

sc = NULL;		sc = NULL;
error = 1;		error = 1;

		#ifndef WITHOUT_CAPSICUM
		cap_rights_init(&rights, CAP_IOCTL, CAP_READ, CAP_WRITE);
		#endif

memflags = vm_get_memflags(ctx);		memflags = vm_get_memflags(ctx);
if (!(memflags & VM_MEM_F_WIRED)) {		if (!(memflags & VM_MEM_F_WIRED)) {
warnx("passthru requires guest memory to be wired");		warnx("passthru requires guest memory to be wired");
goto done;		goto done;
}		}

if (pcifd < 0) {		if (pcifd < 0) {
pcifd = open(_PATH_DEVPCI, O_RDWR, 0);		pcifd = open(_PATH_DEVPCI, O_RDWR, 0);
if (pcifd < 0) {		if (pcifd < 0) {
warn("failed to open %s", _PATH_DEVPCI);		warn("failed to open %s", _PATH_DEVPCI);
goto done;		goto done;
}		}
}		}

		#ifndef WITHOUT_CAPSICUM
		if (cap_rights_limit(pcifd, &rights) == -1 && errno != ENOSYS)
		errx(EX_OSERR, "Unable to apply rights for sandbox");
		if (cap_ioctls_limit(pcifd, pci_ioctls, nitems(pci_ioctls)) == -1 && errno != ENOSYS)
		errx(EX_OSERR, "Unable to apply rights for sandbox");
		#endif

if (iofd < 0) {		if (iofd < 0) {
iofd = open(_PATH_DEVIO, O_RDWR, 0);		iofd = open(_PATH_DEVIO, O_RDWR, 0);
if (iofd < 0) {		if (iofd < 0) {
warn("failed to open %s", _PATH_DEVIO);		warn("failed to open %s", _PATH_DEVIO);
goto done;		goto done;
}		}
}		}

		#ifndef WITHOUT_CAPSICUM
		if (cap_rights_limit(iofd, &rights) == -1 && errno != ENOSYS)
		errx(EX_OSERR, "Unable to apply rights for sandbox");
		if (cap_ioctls_limit(iofd, io_ioctls, nitems(io_ioctls)) == -1 && errno != ENOSYS)
		errx(EX_OSERR, "Unable to apply rights for sandbox");
		#endif

if (memfd < 0) {		if (memfd < 0) {
memfd = open(_PATH_MEM, O_RDWR, 0);		memfd = open(_PATH_MEM, O_RDWR, 0);
if (memfd < 0) {		if (memfd < 0) {
warn("failed to open %s", _PATH_MEM);		warn("failed to open %s", _PATH_MEM);
goto done;		goto done;
}		}
}		}

		#ifndef WITHOUT_CAPSICUM
		cap_rights_clear(&rights, CAP_IOCTL);
		if (cap_rights_limit(memfd, &rights) == -1 && errno != ENOSYS)
		errx(EX_OSERR, "Unable to apply rights for sandbox");
		#endif

if (opts == NULL \|\|		if (opts == NULL \|\|
sscanf(opts, "%d/%d/%d", &bus, &slot, &func) != 3) {		sscanf(opts, "%d/%d/%d", &bus, &slot, &func) != 3) {
warnx("invalid passthru options");		warnx("invalid passthru options");
goto done;		goto done;
}		}

if (vm_assign_pptdev(ctx, bus, slot, func) != 0) {		if (vm_assign_pptdev(ctx, bus, slot, func) != 0) {
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