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vfio/pci: Config mirror quirk

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Re-implement our mirror quirk using the new infrastructure.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Alex Williamson 2015-09-23 13:04:48 -06:00
parent 0e54f24a5b
commit 0d38fb1c5f
2 changed files with 125 additions and 106 deletions
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222
hw/vfio/pci-quirks.c
View File

@ -27,6 +27,14 @@ static bool vfio_pci_is(VFIOPCIDevice *vdev, uint32_t vendor, uint32_t device)
device == pci_get_word(pdev->config + PCI_DEVICE_ID));
}
static bool vfio_is_vga(VFIOPCIDevice *vdev)
{
PCIDevice *pdev = &vdev->pdev;
uint16_t class = pci_get_word(pdev->config + PCI_CLASS_DEVICE);
return class == PCI_CLASS_DISPLAY_VGA;
}
/*
* List of device ids/vendor ids for which to disable
* option rom loading. This avoids the guest hangs during rom
@ -184,6 +192,55 @@ static const MemoryRegionOps vfio_generic_window_data_quirk = {
.endianness = DEVICE_LITTLE_ENDIAN,
};
/*
* The generic mirror quirk handles devices which expose PCI config space
* through a region within a BAR. When enabled, reads and writes are
* redirected through to emulated PCI config space. XXX if PCI config space
* used memory regions, this could just be an alias.
*/
typedef struct VFIOConfigMirrorQuirk {
struct VFIOPCIDevice *vdev;
uint32_t offset;
uint8_t bar;
MemoryRegion *mem;
} VFIOConfigMirrorQuirk;
static uint64_t vfio_generic_quirk_mirror_read(void *opaque,
hwaddr addr, unsigned size)
{
VFIOConfigMirrorQuirk *mirror = opaque;
VFIOPCIDevice *vdev = mirror->vdev;
uint64_t data;
/* Read and discard in case the hardware cares */
(void)vfio_region_read(&vdev->bars[mirror->bar].region,
addr + mirror->offset, size);
data = vfio_pci_read_config(&vdev->pdev, addr, size);
trace_vfio_quirk_generic_mirror_read(vdev->vbasedev.name,
memory_region_name(mirror->mem),
addr, data);
return data;
}
static void vfio_generic_quirk_mirror_write(void *opaque, hwaddr addr,
uint64_t data, unsigned size)
{
VFIOConfigMirrorQuirk *mirror = opaque;
VFIOPCIDevice *vdev = mirror->vdev;
vfio_pci_write_config(&vdev->pdev, addr, data, size);
trace_vfio_quirk_generic_mirror_write(vdev->vbasedev.name,
memory_region_name(mirror->mem),
addr, data);
}
static const MemoryRegionOps vfio_generic_mirror_quirk = {
.read = vfio_generic_quirk_mirror_read,
.write = vfio_generic_quirk_mirror_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
/* Is range1 fully contained within range2? */
static bool vfio_range_contained(uint64_t first1, uint64_t len1,
uint64_t first2, uint64_t len2) {
@ -457,40 +514,36 @@ static void vfio_probe_ati_bar4_quirk(VFIOPCIDevice *vdev, int nr)
}
/*
* Trap the BAR2 MMIO window to config space as well.
* Trap the BAR2 MMIO mirror to config space as well.
*/
static void vfio_probe_ati_bar2_4000_quirk(VFIOPCIDevice *vdev, int nr)
static void vfio_probe_ati_bar2_quirk(VFIOPCIDevice *vdev, int nr)
{
PCIDevice *pdev = &vdev->pdev;
VFIOQuirk *quirk;
VFIOLegacyQuirk *legacy;
VFIOConfigMirrorQuirk *mirror;
/* Only enable on newer devices where BAR2 is 64bit */
if (!vdev->has_vga || nr != 2 || !vdev->bars[2].mem64 ||
pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI) {
if (!vfio_pci_is(vdev, PCI_VENDOR_ID_ATI, PCI_ANY_ID) ||
!vdev->has_vga || nr != 2 || !vdev->bars[2].mem64) {
return;
}
quirk = g_malloc0(sizeof(*quirk));
quirk->data = legacy = g_malloc0(sizeof(*legacy));
quirk->mem = legacy->mem = g_malloc0_n(sizeof(MemoryRegion), 1);
mirror = quirk->data = g_malloc0(sizeof(*mirror));
mirror->mem = quirk->mem = g_malloc0_n(sizeof(MemoryRegion), 1);
quirk->nr_mem = 1;
legacy->vdev = vdev;
legacy->data.flags = legacy->data.read_flags = legacy->data.write_flags = 1;
legacy->data.address_match = 0x4000;
legacy->data.address_mask = PCIE_CONFIG_SPACE_SIZE - 1;
legacy->data.bar = nr;
mirror->vdev = vdev;
mirror->offset = 0x4000;
mirror->bar = nr;
memory_region_init_io(quirk->mem, OBJECT(vdev), &vfio_generic_quirk, legacy,
"vfio-ati-bar2-4000-quirk",
TARGET_PAGE_ALIGN(legacy->data.address_mask + 1));
memory_region_init_io(mirror->mem, OBJECT(vdev),
&vfio_generic_mirror_quirk, mirror,
"vfio-ati-bar2-4000-quirk", PCI_CONFIG_SPACE_SIZE);
memory_region_add_subregion_overlap(&vdev->bars[nr].region.mem,
legacy->data.address_match & TARGET_PAGE_MASK,
quirk->mem, 1);
mirror->offset, mirror->mem, 1);
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
trace_vfio_probe_ati_bar2_4000_quirk(vdev->vbasedev.name);
trace_vfio_quirk_ati_bar2_probe(vdev->vbasedev.name);
}
/*
@ -820,120 +873,86 @@ static void vfio_probe_nvidia_bar5_quirk(VFIOPCIDevice *vdev, int nr)
trace_vfio_quirk_nvidia_bar5_probe(vdev->vbasedev.name);
}
static void vfio_nvidia_88000_quirk_write(void *opaque, hwaddr addr,
uint64_t data, unsigned size)
/*
* Finally, BAR0 itself. We want to redirect any accesses to either
* 0x1800 or 0x88000 through the PCI config space access functions.
*/
static void vfio_nvidia_quirk_mirror_write(void *opaque, hwaddr addr,
uint64_t data, unsigned size)
{
VFIOLegacyQuirk *quirk = opaque;
VFIOPCIDevice *vdev = quirk->vdev;
VFIOConfigMirrorQuirk *mirror = opaque;
VFIOPCIDevice *vdev = mirror->vdev;
PCIDevice *pdev = &vdev->pdev;
hwaddr base = quirk->data.address_match & TARGET_PAGE_MASK;
vfio_generic_quirk_write(opaque, addr, data, size);
vfio_generic_quirk_mirror_write(opaque, addr, data, size);
/*
* Nvidia seems to acknowledge MSI interrupts by writing 0xff to the
* MSI capability ID register. Both the ID and next register are
* read-only, so we allow writes covering either of those to real hw.
* NB - only fixed for the 0x88000 MMIO window.
*/
if ((pdev->cap_present & QEMU_PCI_CAP_MSI) &&
vfio_range_contained(addr, size, pdev->msi_cap, PCI_MSI_FLAGS)) {
vfio_region_write(&vdev->bars[quirk->data.bar].region,
addr + base, data, size);
vfio_region_write(&vdev->bars[mirror->bar].region,
addr + mirror->offset, data, size);
trace_vfio_quirk_nvidia_bar0_msi_ack(vdev->vbasedev.name);
}
}
static const MemoryRegionOps vfio_nvidia_88000_quirk = {
.read = vfio_generic_quirk_read,
.write = vfio_nvidia_88000_quirk_write,
static const MemoryRegionOps vfio_nvidia_mirror_quirk = {
.read = vfio_generic_quirk_mirror_read,
.write = vfio_nvidia_quirk_mirror_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
/*
* Finally, BAR0 itself. We want to redirect any accesses to either
* 0x1800 or 0x88000 through the PCI config space access functions.
*
* NB - quirk at a page granularity or else they don't seem to work when
* BARs are mmap'd
*
* Here's offset 0x88000...
*/
static void vfio_probe_nvidia_bar0_88000_quirk(VFIOPCIDevice *vdev, int nr)
static void vfio_probe_nvidia_bar0_quirk(VFIOPCIDevice *vdev, int nr)
{
PCIDevice *pdev = &vdev->pdev;
VFIOQuirk *quirk;
VFIOLegacyQuirk *legacy;
uint16_t vendor, class;
VFIOConfigMirrorQuirk *mirror;
vendor = pci_get_word(pdev->config + PCI_VENDOR_ID);
class = pci_get_word(pdev->config + PCI_CLASS_DEVICE);
if (nr != 0 || vendor != PCI_VENDOR_ID_NVIDIA ||
class != PCI_CLASS_DISPLAY_VGA) {
if (!vfio_pci_is(vdev, PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID) ||
!vfio_is_vga(vdev) || nr != 0) {
return;
}
quirk = g_malloc0(sizeof(*quirk));
quirk->data = legacy = g_malloc0(sizeof(*legacy));
quirk->mem = legacy->mem = g_malloc0_n(sizeof(MemoryRegion), 1);
mirror = quirk->data = g_malloc0(sizeof(*mirror));
mirror->mem = quirk->mem = g_malloc0_n(sizeof(MemoryRegion), 1);
quirk->nr_mem = 1;
legacy->vdev = vdev;
legacy->data.flags = legacy->data.read_flags = legacy->data.write_flags = 1;
legacy->data.address_match = 0x88000;
legacy->data.address_mask = PCIE_CONFIG_SPACE_SIZE - 1;
legacy->data.bar = nr;
mirror->vdev = vdev;
mirror->offset = 0x88000;
mirror->bar = nr;
memory_region_init_io(quirk->mem, OBJECT(vdev), &vfio_nvidia_88000_quirk,
legacy, "vfio-nvidia-bar0-88000-quirk",
TARGET_PAGE_ALIGN(legacy->data.address_mask + 1));
memory_region_init_io(mirror->mem, OBJECT(vdev),
&vfio_nvidia_mirror_quirk, mirror,
"vfio-nvidia-bar0-88000-mirror-quirk",
PCIE_CONFIG_SPACE_SIZE);
memory_region_add_subregion_overlap(&vdev->bars[nr].region.mem,
legacy->data.address_match & TARGET_PAGE_MASK,
quirk->mem, 1);
mirror->offset, mirror->mem, 1);
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
trace_vfio_probe_nvidia_bar0_88000_quirk(vdev->vbasedev.name);
}
/* The 0x1800 offset mirror only seems to get used by legacy VGA */
if (vdev->has_vga) {
quirk = g_malloc0(sizeof(*quirk));
mirror = quirk->data = g_malloc0(sizeof(*mirror));
mirror->mem = quirk->mem = g_malloc0_n(sizeof(MemoryRegion), 1);
quirk->nr_mem = 1;
mirror->vdev = vdev;
mirror->offset = 0x1800;
mirror->bar = nr;
/*
* And here's the same for BAR0 offset 0x1800...
*/
static void vfio_probe_nvidia_bar0_1800_quirk(VFIOPCIDevice *vdev, int nr)
{
PCIDevice *pdev = &vdev->pdev;
VFIOQuirk *quirk;
VFIOLegacyQuirk *legacy;
memory_region_init_io(mirror->mem, OBJECT(vdev),
&vfio_nvidia_mirror_quirk, mirror,
"vfio-nvidia-bar0-1800-mirror-quirk",
PCI_CONFIG_SPACE_SIZE);
memory_region_add_subregion_overlap(&vdev->bars[nr].region.mem,
mirror->offset, mirror->mem, 1);
if (!vdev->has_vga || nr != 0 ||
pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA) {
return;
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
}
/* Log the chipset ID */
trace_vfio_probe_nvidia_bar0_1800_quirk_id(
(unsigned int)(vfio_region_read(&vdev->bars[0].region, 0, 4) >> 20)
& 0xff);
quirk = g_malloc0(sizeof(*quirk));
quirk->data = legacy = g_malloc0(sizeof(*legacy));
quirk->mem = legacy->mem = g_malloc0_n(sizeof(MemoryRegion), 1);
quirk->nr_mem = 1;
legacy->vdev = vdev;
legacy->data.flags = legacy->data.read_flags = legacy->data.write_flags = 1;
legacy->data.address_match = 0x1800;
legacy->data.address_mask = PCI_CONFIG_SPACE_SIZE - 1;
legacy->data.bar = nr;
memory_region_init_io(quirk->mem, OBJECT(vdev), &vfio_generic_quirk, legacy,
"vfio-nvidia-bar0-1800-quirk",
TARGET_PAGE_ALIGN(legacy->data.address_mask + 1));
memory_region_add_subregion_overlap(&vdev->bars[nr].region.mem,
legacy->data.address_match & TARGET_PAGE_MASK,
quirk->mem, 1);
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
trace_vfio_probe_nvidia_bar0_1800_quirk(vdev->vbasedev.name);
trace_vfio_quirk_nvidia_bar0_probe(vdev->vbasedev.name);
}
/*
@ -1147,10 +1166,9 @@ void vfio_vga_quirk_free(VFIOPCIDevice *vdev)
void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr)
{
vfio_probe_ati_bar4_quirk(vdev, nr);
vfio_probe_ati_bar2_4000_quirk(vdev, nr);
vfio_probe_ati_bar2_quirk(vdev, nr);
vfio_probe_nvidia_bar5_quirk(vdev, nr);
vfio_probe_nvidia_bar0_88000_quirk(vdev, nr);
vfio_probe_nvidia_bar0_1800_quirk(vdev, nr);
vfio_probe_nvidia_bar0_quirk(vdev, nr);
vfio_probe_rtl8168_bar2_quirk(vdev, nr);
}

9
trace-events
View File

@ -1551,10 +1551,6 @@ vfio_generic_quirk_read(const char * region_name, const char *name, int index, u
# remove )
vfio_generic_quirk_write(const char * region_name, const char *name, int index, uint64_t addr, uint64_t data, int size) "%s write(%s:BAR%d+0x%"PRIx64", 0x%"PRIx64", %d"
#issue with )
vfio_probe_ati_bar2_4000_quirk(const char *name) "Enabled ATI/AMD BAR2 0x4000 quirk for device %s"
vfio_probe_nvidia_bar0_88000_quirk(const char *name) "Enabled NVIDIA BAR0 0x88000 quirk for device %s"
vfio_probe_nvidia_bar0_1800_quirk_id(int id) "Nvidia NV%02x"
vfio_probe_nvidia_bar0_1800_quirk(const char *name) "Enabled NVIDIA BAR0 0x1800 quirk for device %s"
vfio_pci_read_config(const char *name, int addr, int len, int val) " (%s, @0x%x, len=0x%x) %x"
vfio_pci_write_config(const char *name, int addr, int val, int len) " (%s, @0x%x, 0x%x, len=0x%x)"
vfio_msi_setup(const char *name, int pos) "%s PCI MSI CAP @0x%x"
@ -1579,15 +1575,20 @@ vfio_quirk_rom_blacklisted(const char *name, uint16_t vid, uint16_t did) "%s %04
vfio_quirk_generic_window_address_write(const char *name, const char * region_name, uint64_t data) "%s %s 0x%"PRIx64
vfio_quirk_generic_window_data_read(const char *name, const char * region_name, uint64_t data) "%s %s 0x%"PRIx64
vfio_quirk_generic_window_data_write(const char *name, const char * region_name, uint64_t data) "%s %s 0x%"PRIx64
vfio_quirk_generic_mirror_read(const char *name, const char * region_name, uint64_t addr, uint64_t data) "%s %s 0x%"PRIx64": 0x%"PRIx64
vfio_quirk_generic_mirror_write(const char *name, const char * region_name, uint64_t addr, uint64_t data) "%s %s 0x%"PRIx64": 0x%"PRIx64
vfio_quirk_ati_3c3_read(const char *name, uint64_t data) "%s 0x%"PRIx64
vfio_quirk_ati_3c3_probe(const char *name) "%s"
vfio_quirk_ati_bar4_probe(const char *name) "%s"
vfio_quirk_ati_bar2_probe(const char *name) "%s"
vfio_quirk_nvidia_3d0_state(const char *name, const char *state) "%s %s"
vfio_quirk_nvidia_3d0_read(const char *name, uint8_t offset, unsigned size, uint64_t val) " (%s, @0x%x, len=0x%x) %"PRIx64
vfio_quirk_nvidia_3d0_write(const char *name, uint8_t offset, uint64_t data, unsigned size) "(%s, @0x%x, 0x%"PRIx64", len=0x%x)"
vfio_quirk_nvidia_3d0_probe(const char *name) "%s"
vfio_quirk_nvidia_bar5_state(const char *name, const char *state) "%s %s"
vfio_quirk_nvidia_bar5_probe(const char *name) "%s"
vfio_quirk_nvidia_bar0_msi_ack(const char *name) "%s"
vfio_quirk_nvidia_bar0_probe(const char *name) "%s"
vfio_quirk_rtl8168_fake_latch(const char *name, uint64_t val) "%s 0x%"PRIx64
vfio_quirk_rtl8168_msix_write(const char *name, uint16_t offset, uint64_t val) "%s MSI-X table write[0x%x]: 0x%"PRIx64
vfio_quirk_rtl8168_msix_read(const char *name, uint16_t offset, uint64_t val) "%s MSI-X table read[0x%x]: 0x%"PRIx64