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📁 ..
📄 Makefile(2.18 KB)
📄 Makefile.depend(434 B)
📄 Makefile.depend.options(115 B)
📄 acpi.c(29.64 KB)
📄 acpi.h(2.26 KB)
📄 ahci.h(10.72 KB)
📄 atkbdc.c(15.5 KB)
📄 atkbdc.h(1.66 KB)
📄 audio.c(6.84 KB)
📄 audio.h(2.91 KB)
📄 bhyve.8(18.81 KB)
📄 bhyvegc.c(2.76 KB)
📄 bhyvegc.h(1.83 KB)
📄 bhyverun.c(33 KB)
📄 bhyverun.h(2.06 KB)
📄 block_if.c(21.38 KB)
📄 block_if.h(3.37 KB)
📄 bootrom.c(4.92 KB)
📄 bootrom.h(1.8 KB)
📄 console.c(3 KB)
📄 console.h(2.18 KB)
📄 debug.h(1.74 KB)
📄 fwctl.c(9.7 KB)
📄 fwctl.h(1.87 KB)
📄 gdb.c(37.2 KB)
📄 gdb.h(1.65 KB)
📄 hda_codec.c(24.56 KB)
📄 hda_reg.h(57.84 KB)
📄 hdac_reg.h(10.96 KB)
📄 inout.c(6.97 KB)
📄 inout.h(2.54 KB)
📄 ioapic.c(2.45 KB)
📄 ioapic.h(1.65 KB)
📄 iov.c(3.47 KB)
📄 iov.h(1.93 KB)
📄 kernemu_dev.c(2.95 KB)
📄 kernemu_dev.h(1.44 KB)
📄 mem.c(8.78 KB)
📄 mem.h(2.31 KB)
📄 mevent.c(9.86 KB)
📄 mevent.h(1.95 KB)
📄 mevent_test.c(5.36 KB)
📄 mptbl.c(9.44 KB)
📄 mptbl.h(1.53 KB)
📄 net_backends.c(24.6 KB)
📄 net_backends.h(4.19 KB)
📄 net_utils.c(3.04 KB)
📄 net_utils.h(1.67 KB)
📄 pci_ahci.c(64.56 KB)
📄 pci_e82545.c(65.54 KB)
📄 pci_emul.c(54.54 KB)
📄 pci_emul.h(8.47 KB)
📄 pci_fbuf.c(10.34 KB)
📄 pci_hda.c(30.87 KB)
📄 pci_hda.h(2.73 KB)
📄 pci_hostbridge.c(2.43 KB)
📄 pci_irq.c(9.19 KB)
📄 pci_irq.h(1.85 KB)
📄 pci_lpc.c(11.06 KB)
📄 pci_lpc.h(2.41 KB)
📄 pci_nvme.c(73.14 KB)
📄 pci_passthru.c(22.85 KB)
📄 pci_uart.c(3.2 KB)
📄 pci_virtio_9p.c(9.1 KB)
📄 pci_virtio_block.c(15.89 KB)
📄 pci_virtio_console.c(15.86 KB)
📄 pci_virtio_net.c(20.05 KB)
📄 pci_virtio_rnd.c(5.23 KB)
📄 pci_virtio_scsi.c(19.95 KB)
📄 pci_xhci.c(80.6 KB)
📄 pci_xhci.h(13.02 KB)
📄 pctestdev.c(6.3 KB)
📄 pctestdev.h(1.65 KB)
📄 pm.c(8.9 KB)
📄 post.c(1.8 KB)
📄 ps2kbd.c(10.24 KB)
📄 ps2kbd.h(1.8 KB)
📄 ps2mouse.c(9.85 KB)
📄 ps2mouse.h(1.94 KB)
📄 rfb.c(25.9 KB)
📄 rfb.h(1.56 KB)
📄 rtc.c(3.4 KB)
📄 rtc.h(1.52 KB)
📄 smbiostbl.c(25.33 KB)
📄 smbiostbl.h(1.54 KB)
📄 snapshot.c(38.16 KB)
📄 snapshot.h(3.51 KB)
📄 sockstream.c(2.16 KB)
📄 sockstream.h(1.54 KB)
📄 spinup_ap.c(3 KB)
📄 spinup_ap.h(1.5 KB)
📄 task_switch.c(25.78 KB)
📄 uart_emul.c(15.75 KB)
📄 uart_emul.h(1.99 KB)
📄 usb_emul.c(2.3 KB)
📄 usb_emul.h(4.56 KB)
📄 usb_mouse.c(19.9 KB)
📄 vga.c(33.42 KB)
📄 vga.h(5.32 KB)
📄 virtio.c(25.01 KB)
📄 virtio.h(18.67 KB)
📄 vmgenc.c(3.27 KB)
📄 vmgenc.h(1.48 KB)
📄 xmsr.c(5.28 KB)
📄 xmsr.h(1.59 KB)

Editing: inout.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2011 NetApp, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

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

#include <sys/param.h>
#include <sys/linker_set.h>
#include <sys/_iovec.h>
#include <sys/mman.h>

#include <x86/psl.h>
#include <x86/segments.h>

#include <machine/vmm.h>
#include <machine/vmm_instruction_emul.h>
#include <vmmapi.h>

#include <stdio.h>
#include <string.h>
#include <assert.h>

#include "bhyverun.h"
#include "inout.h"

SET_DECLARE(inout_port_set, struct inout_port);

#define	MAX_IOPORTS	(1 << 16)

#define	VERIFY_IOPORT(port, size) \
	assert((port) >= 0 && (size) > 0 && ((port) + (size)) <= MAX_IOPORTS)

static struct {
	const char	*name;
	int		flags;
	inout_func_t	handler;
	void		*arg;
} inout_handlers[MAX_IOPORTS];

static int
default_inout(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
              uint32_t *eax, void *arg)
{
	if (in) {
		switch (bytes) {
		case 4:
			*eax = 0xffffffff;
			break;
		case 2:
			*eax = 0xffff;
			break;
		case 1:
			*eax = 0xff;
			break;
		}
	}

return (0);
}

static void 
register_default_iohandler(int start, int size)
{
	struct inout_port iop;
	
	VERIFY_IOPORT(start, size);

bzero(&iop, sizeof(iop));
	iop.name = "default";
	iop.port = start;
	iop.size = size;
	iop.flags = IOPORT_F_INOUT | IOPORT_F_DEFAULT;
	iop.handler = default_inout;

register_inout(&iop);
}

int
emulate_inout(struct vmctx *ctx, int vcpu, struct vm_exit *vmexit, int strict)
{
	int addrsize, bytes, flags, in, port, prot, rep;
	uint32_t eax, val;
	inout_func_t handler;
	void *arg;
	int error, fault, retval;
	enum vm_reg_name idxreg;
	uint64_t gla, index, iterations, count;
	struct vm_inout_str *vis;
	struct iovec iov[2];

bytes = vmexit->u.inout.bytes;
	in = vmexit->u.inout.in;
	port = vmexit->u.inout.port;

assert(port < MAX_IOPORTS);
	assert(bytes == 1 || bytes == 2 || bytes == 4);

handler = inout_handlers[port].handler;

if (strict && handler == default_inout)
		return (-1);

flags = inout_handlers[port].flags;
	arg = inout_handlers[port].arg;

if (in) {
		if (!(flags & IOPORT_F_IN))
			return (-1);
	} else {
		if (!(flags & IOPORT_F_OUT))
			return (-1);
	}

retval = 0;
	if (vmexit->u.inout.string) {
		vis = &vmexit->u.inout_str;
		rep = vis->inout.rep;
		addrsize = vis->addrsize;
		prot = in ? PROT_WRITE : PROT_READ;
		assert(addrsize == 2 || addrsize == 4 || addrsize == 8);

/* Index register */
		idxreg = in ? VM_REG_GUEST_RDI : VM_REG_GUEST_RSI;
		index = vis->index & vie_size2mask(addrsize);

/* Count register */
		count = vis->count & vie_size2mask(addrsize);

/* Limit number of back-to-back in/out emulations to 16 */
		iterations = MIN(count, 16);
		while (iterations > 0) {
			assert(retval == 0);
			if (vie_calculate_gla(vis->paging.cpu_mode,
			    vis->seg_name, &vis->seg_desc, index, bytes,
			    addrsize, prot, &gla)) {
				vm_inject_gp(ctx, vcpu);
				break;
			}

error = vm_copy_setup(ctx, vcpu, &vis->paging, gla,
			    bytes, prot, iov, nitems(iov), &fault);
			if (error) {
				retval = -1;  /* Unrecoverable error */
				break;
			} else if (fault) {
				retval = 0;  /* Resume guest to handle fault */
				break;
			}

if (vie_alignment_check(vis->paging.cpl, bytes,
			    vis->cr0, vis->rflags, gla)) {
				vm_inject_ac(ctx, vcpu, 0);
				break;
			}

val = 0;
			if (!in)
				vm_copyin(ctx, vcpu, iov, &val, bytes);

retval = handler(ctx, vcpu, in, port, bytes, &val, arg);
			if (retval != 0)
				break;

if (in)
				vm_copyout(ctx, vcpu, &val, iov, bytes);

/* Update index */
			if (vis->rflags & PSL_D)
				index -= bytes;
			else
				index += bytes;

count--;
			iterations--;
		}

/* Update index register */
		error = vie_update_register(ctx, vcpu, idxreg, index, addrsize);
		assert(error == 0);

/*
		 * Update count register only if the instruction had a repeat
		 * prefix.
		 */
		if (rep) {
			error = vie_update_register(ctx, vcpu, VM_REG_GUEST_RCX,
			    count, addrsize);
			assert(error == 0);
		}

/* Restart the instruction if more iterations remain */
		if (retval == 0 && count != 0) {
			error = vm_restart_instruction(ctx, vcpu);
			assert(error == 0);
		}
	} else {
		eax = vmexit->u.inout.eax;
		val = eax & vie_size2mask(bytes);
		retval = handler(ctx, vcpu, in, port, bytes, &val, arg);
		if (retval == 0 && in) {
			eax &= ~vie_size2mask(bytes);
			eax |= val & vie_size2mask(bytes);
			error = vm_set_register(ctx, vcpu, VM_REG_GUEST_RAX,
			    eax);
			assert(error == 0);
		}
	}
	return (retval);
}

void
init_inout(void)
{
	struct inout_port **iopp, *iop;

/*
	 * Set up the default handler for all ports
	 */
	register_default_iohandler(0, MAX_IOPORTS);

/*
	 * Overwrite with specified handlers
	 */
	SET_FOREACH(iopp, inout_port_set) {
		iop = *iopp;
		assert(iop->port < MAX_IOPORTS);
		inout_handlers[iop->port].name = iop->name;
		inout_handlers[iop->port].flags = iop->flags;
		inout_handlers[iop->port].handler = iop->handler;
		inout_handlers[iop->port].arg = NULL;
	}
}

int
register_inout(struct inout_port *iop)
{
	int i;

VERIFY_IOPORT(iop->port, iop->size);

/*
	 * Verify that the new registration is not overwriting an already
	 * allocated i/o range.
	 */
	if ((iop->flags & IOPORT_F_DEFAULT) == 0) {
		for (i = iop->port; i < iop->port + iop->size; i++) {
			if ((inout_handlers[i].flags & IOPORT_F_DEFAULT) == 0)
				return (-1);
		}
	}

for (i = iop->port; i < iop->port + iop->size; i++) {
		inout_handlers[i].name = iop->name;
		inout_handlers[i].flags = iop->flags;
		inout_handlers[i].handler = iop->handler;
		inout_handlers[i].arg = iop->arg;
	}

return (0);
}

int
unregister_inout(struct inout_port *iop)
{

VERIFY_IOPORT(iop->port, iop->size);
	assert(inout_handlers[iop->port].name == iop->name);

register_default_iohandler(iop->port, iop->size);

return (0);
}

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Editing: inout.c

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