The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
263 lines
6.2 KiB
C
263 lines
6.2 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2020 Adam Fenn <adam@fenn.io>
|
|
*
|
|
* 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 THE AUTHORS AND CONTRIBUTORS ``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 THE AUTHORS 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.
|
|
*/
|
|
|
|
/*
|
|
* Emulation of selected legacy test/debug interfaces expected by KVM-unit-tests
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/mman.h>
|
|
#include <machine/vmm.h>
|
|
|
|
#include <assert.h>
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <vmmapi.h>
|
|
|
|
#include "debug.h"
|
|
#include "inout.h"
|
|
#include "mem.h"
|
|
#include "pctestdev.h"
|
|
|
|
#define DEBUGEXIT_BASE 0xf4
|
|
#define DEBUGEXIT_LEN 4
|
|
#define DEBUGEXIT_NAME "isa-debug-exit"
|
|
|
|
#define IOMEM_BASE 0xff000000
|
|
#define IOMEM_LEN 0x10000
|
|
#define IOMEM_NAME "pc-testdev-iomem"
|
|
|
|
#define IOPORT_BASE 0xe0
|
|
#define IOPORT_LEN 4
|
|
#define IOPORT_NAME "pc-testdev-ioport"
|
|
|
|
#define IRQ_BASE 0x2000
|
|
#define IRQ_IOAPIC_PINCOUNT_MIN 24
|
|
#define IRQ_IOAPIC_PINCOUNT_MAX 32
|
|
#define IRQ_NAME "pc-testdev-irq-line"
|
|
|
|
#define PCTESTDEV_NAME "pc-testdev"
|
|
|
|
static bool pctestdev_inited;
|
|
static uint8_t pctestdev_iomem_buf[IOMEM_LEN];
|
|
static uint32_t pctestdev_ioport_data;
|
|
|
|
static int pctestdev_debugexit_io(struct vmctx *ctx, int in,
|
|
int port, int bytes, uint32_t *eax, void *arg);
|
|
static int pctestdev_iomem_io(struct vcpu *vcpu, int dir,
|
|
uint64_t addr, int size, uint64_t *val, void *arg1,
|
|
long arg2);
|
|
static int pctestdev_ioport_io(struct vmctx *ctx, int in,
|
|
int port, int bytes, uint32_t *eax, void *arg);
|
|
static int pctestdev_irq_io(struct vmctx *ctx, int in,
|
|
int port, int bytes, uint32_t *eax, void *arg);
|
|
|
|
const char *
|
|
pctestdev_getname(void)
|
|
{
|
|
return (PCTESTDEV_NAME);
|
|
}
|
|
|
|
int
|
|
pctestdev_init(struct vmctx *ctx)
|
|
{
|
|
struct mem_range iomem;
|
|
struct inout_port debugexit, ioport, irq;
|
|
int err, pincount;
|
|
|
|
if (pctestdev_inited) {
|
|
EPRINTLN("Only one pc-testdev device is allowed.");
|
|
|
|
return (-1);
|
|
}
|
|
|
|
err = vm_ioapic_pincount(ctx, &pincount);
|
|
if (err != 0) {
|
|
EPRINTLN("pc-testdev: Failed to obtain IOAPIC pin count.");
|
|
|
|
return (-1);
|
|
}
|
|
if (pincount < IRQ_IOAPIC_PINCOUNT_MIN ||
|
|
pincount > IRQ_IOAPIC_PINCOUNT_MAX) {
|
|
EPRINTLN("pc-testdev: Unsupported IOAPIC pin count: %d.",
|
|
pincount);
|
|
|
|
return (-1);
|
|
}
|
|
|
|
debugexit.name = DEBUGEXIT_NAME;
|
|
debugexit.port = DEBUGEXIT_BASE;
|
|
debugexit.size = DEBUGEXIT_LEN;
|
|
debugexit.flags = IOPORT_F_INOUT;
|
|
debugexit.handler = pctestdev_debugexit_io;
|
|
debugexit.arg = NULL;
|
|
|
|
iomem.name = IOMEM_NAME;
|
|
iomem.flags = MEM_F_RW | MEM_F_IMMUTABLE;
|
|
iomem.handler = pctestdev_iomem_io;
|
|
iomem.arg1 = NULL;
|
|
iomem.arg2 = 0;
|
|
iomem.base = IOMEM_BASE;
|
|
iomem.size = IOMEM_LEN;
|
|
|
|
ioport.name = IOPORT_NAME;
|
|
ioport.port = IOPORT_BASE;
|
|
ioport.size = IOPORT_LEN;
|
|
ioport.flags = IOPORT_F_INOUT;
|
|
ioport.handler = pctestdev_ioport_io;
|
|
ioport.arg = NULL;
|
|
|
|
irq.name = IRQ_NAME;
|
|
irq.port = IRQ_BASE;
|
|
irq.size = pincount;
|
|
irq.flags = IOPORT_F_INOUT;
|
|
irq.handler = pctestdev_irq_io;
|
|
irq.arg = NULL;
|
|
|
|
err = register_inout(&debugexit);
|
|
if (err != 0)
|
|
goto fail;
|
|
|
|
err = register_inout(&ioport);
|
|
if (err != 0)
|
|
goto fail_after_debugexit_reg;
|
|
|
|
err = register_inout(&irq);
|
|
if (err != 0)
|
|
goto fail_after_ioport_reg;
|
|
|
|
err = register_mem(&iomem);
|
|
if (err != 0)
|
|
goto fail_after_irq_reg;
|
|
|
|
pctestdev_inited = true;
|
|
|
|
return (0);
|
|
|
|
fail_after_irq_reg:
|
|
(void)unregister_inout(&irq);
|
|
|
|
fail_after_ioport_reg:
|
|
(void)unregister_inout(&ioport);
|
|
|
|
fail_after_debugexit_reg:
|
|
(void)unregister_inout(&debugexit);
|
|
|
|
fail:
|
|
return (err);
|
|
}
|
|
|
|
static int
|
|
pctestdev_debugexit_io(struct vmctx *ctx __unused, int in,
|
|
int port __unused, int bytes __unused, uint32_t *eax, void *arg __unused)
|
|
{
|
|
if (in)
|
|
*eax = 0;
|
|
else
|
|
exit((*eax << 1) | 1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pctestdev_iomem_io(struct vcpu *vcpu __unused, int dir,
|
|
uint64_t addr, int size, uint64_t *val, void *arg1 __unused,
|
|
long arg2 __unused)
|
|
{
|
|
uint64_t offset;
|
|
|
|
if (addr + size > IOMEM_BASE + IOMEM_LEN)
|
|
return (-1);
|
|
|
|
offset = addr - IOMEM_BASE;
|
|
if (dir == MEM_F_READ) {
|
|
(void)memcpy(val, pctestdev_iomem_buf + offset, size);
|
|
} else {
|
|
assert(dir == MEM_F_WRITE);
|
|
(void)memcpy(pctestdev_iomem_buf + offset, val, size);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pctestdev_ioport_io(struct vmctx *ctx __unused, int in,
|
|
int port, int bytes, uint32_t *eax, void *arg __unused)
|
|
{
|
|
uint32_t mask;
|
|
int lsb;
|
|
|
|
if (port + bytes > IOPORT_BASE + IOPORT_LEN)
|
|
return (-1);
|
|
|
|
lsb = (port & 0x3) * 8;
|
|
mask = (-1UL >> (32 - (bytes * 8))) << lsb;
|
|
|
|
if (in)
|
|
*eax = (pctestdev_ioport_data & mask) >> lsb;
|
|
else {
|
|
pctestdev_ioport_data &= ~mask;
|
|
pctestdev_ioport_data |= *eax << lsb;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pctestdev_irq_io(struct vmctx *ctx, int in, int port,
|
|
int bytes, uint32_t *eax, void *arg __unused)
|
|
{
|
|
int irq;
|
|
|
|
if (bytes != 1)
|
|
return (-1);
|
|
|
|
if (in) {
|
|
*eax = 0;
|
|
return (0);
|
|
} else {
|
|
irq = port - IRQ_BASE;
|
|
if (irq < 16) {
|
|
if (*eax)
|
|
return (vm_isa_assert_irq(ctx, irq, irq));
|
|
else
|
|
return (vm_isa_deassert_irq(ctx, irq, irq));
|
|
} else {
|
|
if (*eax)
|
|
return (vm_ioapic_assert_irq(ctx, irq));
|
|
else
|
|
return (vm_ioapic_deassert_irq(ctx, irq));
|
|
}
|
|
}
|
|
}
|