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pci-assign: Remove dead code for direct I/O region access from userspace

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This feature was already deprecated back then in qemu-kvm, ie. before
pci-assign went upstream. assigned_dev_ioport_rw will never be invoked
with resource_fd < 0.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Jan Kiszka 2013-11-04 14:42:55 +01:00 committed by Gleb Natapov
parent 0fd53fec92
commit 3a902babf1
1 changed files with 10 additions and 46 deletions
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56
hw/i386/kvm/pci-assign.c
View file

@ -154,55 +154,19 @@ static uint64_t assigned_dev_ioport_rw(AssignedDevRegion *dev_region,
uint64_t val = 0;
int fd = dev_region->region->resource_fd;
if (fd >= 0) {
if (data) {
DEBUG("pwrite data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
", addr="TARGET_FMT_plx"\n", *data, size, addr, addr);
if (pwrite(fd, data, size, addr) != size) {
error_report("%s - pwrite failed %s",
__func__, strerror(errno));
}
} else {
if (pread(fd, &val, size, addr) != size) {
error_report("%s - pread failed %s",
__func__, strerror(errno));
val = (1UL << (size * 8)) - 1;
}
DEBUG("pread val=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
", addr=" TARGET_FMT_plx "\n", val, size, addr, addr);
if (data) {
DEBUG("pwrite data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
", addr="TARGET_FMT_plx"\n", *data, size, addr, addr);
if (pwrite(fd, data, size, addr) != size) {
error_report("%s - pwrite failed %s", __func__, strerror(errno));
}
} else {
uint32_t port = addr + dev_region->u.r_baseport;
if (data) {
DEBUG("out data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
", host=%x\n", *data, size, addr, port);
switch (size) {
case 1:
outb(*data, port);
break;
case 2:
outw(*data, port);
break;
case 4:
outl(*data, port);
break;
}
} else {
switch (size) {
case 1:
val = inb(port);
break;
case 2:
val = inw(port);
break;
case 4:
val = inl(port);
break;
}
DEBUG("in data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
", host=%x\n", val, size, addr, port);
if (pread(fd, &val, size, addr) != size) {
error_report("%s - pread failed %s", __func__, strerror(errno));
val = (1UL << (size * 8)) - 1;
}
DEBUG("pread val=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
", addr=" TARGET_FMT_plx "\n", val, size, addr, addr);
}
return val;
}