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vfio/pci: Cleanup RTL8168 quirk and tracing

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There's quite a bit of cleanup that can be done to the RTL8168 quirk,
as well as the tracing to prevent a spew of uninteresting accesses
for anything else the driver might choose to use the window registers
for besides the MSI-X table.  There should be no functional change,
but it's now possible to get compact and useful traces by enabling
vfio_rtl8168_quirk*, ex:

vfio_rtl8168_quirk_write 0000:04:00.0 [address]: 0x1f000
vfio_rtl8168_quirk_read 0000:04:00.0 [address]: 0x8001f000
vfio_rtl8168_quirk_read 0000:04:00.0 [data]: 0xfee0100c
vfio_rtl8168_quirk_write 0000:04:00.0 [address]: 0x1f004
vfio_rtl8168_quirk_read 0000:04:00.0 [address]: 0x8001f004
vfio_rtl8168_quirk_read 0000:04:00.0 [data]: 0x0
vfio_rtl8168_quirk_write 0000:04:00.0 [address]: 0x1f008
vfio_rtl8168_quirk_read 0000:04:00.0 [address]: 0x8001f008
vfio_rtl8168_quirk_read 0000:04:00.0 [data]: 0x49b1
vfio_rtl8168_quirk_write 0000:04:00.0 [address]: 0x1f00c
vfio_rtl8168_quirk_read 0000:04:00.0 [address]: 0x8001f00c
vfio_rtl8168_quirk_read 0000:04:00.0 [data]: 0x0

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Alex Williamson 2015-09-23 13:04:42 -06:00
parent 684bb5770e
commit d451008e0f
2 changed files with 41 additions and 57 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

88
hw/vfio/pci.c
View file

@ -1508,44 +1508,29 @@ static uint64_t vfio_rtl8168_window_quirk_read(void *opaque,
{
VFIOQuirk *quirk = opaque;
VFIOPCIDevice *vdev = quirk->vdev;
uint64_t val = 0;
if (!quirk->data.flags) { /* Non-MSI-X table access */
return vfio_region_read(&vdev->bars[quirk->data.bar].region,
addr + 0x70, size);
}
switch (addr) {
case 4: /* address */
if (quirk->data.flags) {
trace_vfio_rtl8168_window_quirk_read_fake(
memory_region_name(&quirk->mem),
vdev->vbasedev.name);
return quirk->data.address_match ^ 0x80000000U;
}
val = quirk->data.address_match ^ 0x80000000U; /* latch/complete */
break;
case 0: /* data */
if (quirk->data.flags) {
uint64_t val;
trace_vfio_rtl8168_window_quirk_read_table(
memory_region_name(&quirk->mem),
vdev->vbasedev.name);
if (!(vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX)) {
return 0;
}
if ((vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX)) {
memory_region_dispatch_read(&vdev->pdev.msix_table_mmio,
(hwaddr)(quirk->data.address_match
& 0xfff),
&val,
size,
MEMTXATTRS_UNSPECIFIED);
return val;
(hwaddr)(quirk->data.address_match & 0xfff),
&val, size, MEMTXATTRS_UNSPECIFIED);
}
break;
}
trace_vfio_rtl8168_window_quirk_read_direct(memory_region_name(&quirk->mem),
vdev->vbasedev.name);
return vfio_region_read(&vdev->bars[quirk->data.bar].region,
addr + 0x70, size);
trace_vfio_rtl8168_quirk_read(vdev->vbasedev.name,
addr ? "address" : "data", val);
return val;
}
static void vfio_rtl8168_window_quirk_write(void *opaque, hwaddr addr,
@ -1556,36 +1541,36 @@ static void vfio_rtl8168_window_quirk_write(void *opaque, hwaddr addr,
switch (addr) {
case 4: /* address */
if ((data & 0x7fff0000) == 0x10000) {
if (data & 0x80000000U &&
vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX) {
trace_vfio_rtl8168_window_quirk_write_table(
memory_region_name(&quirk->mem),
vdev->vbasedev.name);
memory_region_dispatch_write(&vdev->pdev.msix_table_mmio,
(hwaddr)(data & 0xfff),
(uint64_t)quirk->data.address_mask,
size, MEMTXATTRS_UNSPECIFIED);
}
quirk->data.flags = 1;
if ((data & 0x7fff0000) == 0x10000) { /* MSI-X table */
quirk->data.flags = 1; /* Activate reads */
quirk->data.address_match = data;
return;
trace_vfio_rtl8168_quirk_write(vdev->vbasedev.name, data);
if (data & 0x80000000U) { /* Do write */
if (vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX) {
hwaddr offset = data & 0xfff;
uint64_t val = quirk->data.address_mask;
trace_vfio_rtl8168_quirk_msix(vdev->vbasedev.name,
(uint16_t)offset, val);
/* Write to the proper guest MSI-X table instead */
memory_region_dispatch_write(&vdev->pdev.msix_table_mmio,
offset, val, size,
MEMTXATTRS_UNSPECIFIED);
}
return; /* Do not write guest MSI-X data to hardware */
}
} else {
quirk->data.flags = 0; /* De-activate reads, non-MSI-X */
}
quirk->data.flags = 0;
break;
case 0: /* data */
quirk->data.address_mask = data;
break;
}
trace_vfio_rtl8168_window_quirk_write_direct(
memory_region_name(&quirk->mem),
vdev->vbasedev.name);
vfio_region_write(&vdev->bars[quirk->data.bar].region,
addr + 0x70, data, size);
}
@ -1622,8 +1607,9 @@ static void vfio_probe_rtl8168_bar2_window_quirk(VFIOPCIDevice *vdev, int nr)
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
trace_vfio_probe_rtl8168_bar2_window_quirk(vdev->vbasedev.name);
trace_vfio_rtl8168_quirk_enable(vdev->vbasedev.name);
}
/*
* Trap the BAR2 MMIO window to config space as well.
*/

10
trace-events
View file

@ -1554,12 +1554,10 @@ vfio_ati_3c3_quirk_read(uint64_t data) " (0x3c3, 1) = 0x%"PRIx64
vfio_vga_probe_ati_3c3_quirk(const char *name) "Enabled ATI/AMD quirk 0x3c3 BAR4for device %s"
vfio_probe_ati_bar4_window_quirk(const char *name) "Enabled ATI/AMD BAR4 window quirk for device %s"
#issue with )
vfio_rtl8168_window_quirk_read_fake(const char *region_name, const char *name) "%s fake read(%s"
vfio_rtl8168_window_quirk_read_table(const char *region_name, const char *name) "%s MSI-X table read(%s"
vfio_rtl8168_window_quirk_read_direct(const char *region_name, const char *name) "%s direct read(%s"
vfio_rtl8168_window_quirk_write_table(const char *region_name, const char *name) "%s MSI-X table write(%s"
vfio_rtl8168_window_quirk_write_direct(const char *region_name, const char *name) "%s direct write(%s"
vfio_probe_rtl8168_bar2_window_quirk(const char *name) "Enabled RTL8168 BAR2 window quirk for device %s"
vfio_rtl8168_quirk_read(const char *name, const char *type, uint64_t val) "%s [%s]: 0x%"PRIx64
vfio_rtl8168_quirk_write(const char *name, uint64_t val) "%s [address]: 0x%"PRIx64
vfio_rtl8168_quirk_msix(const char *name, uint16_t offset, uint64_t val) "%s MSI-X table write[0x%x]: 0x%"PRIx64
vfio_rtl8168_quirk_enable(const char *name) "%s"
vfio_probe_ati_bar2_4000_quirk(const char *name) "Enabled ATI/AMD BAR2 0x4000 quirk for device %s"
vfio_nvidia_3d0_quirk_read(int size, uint64_t data) " (0x3d0, %d) = 0x%"PRIx64
vfio_nvidia_3d0_quirk_write(uint64_t data, int size) " (0x3d0, 0x%"PRIx64", %d)"