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vfio/pci: Cleanup ROM blacklist quirk

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Create a vendor:device ID helper that we'll also use as we rework the
rest of the quirks.  Re-reading the config entries, even if we get
more blacklist entries, is trivial overhead and only incurred during
device setup.  There's no need to typedef the blacklist structure,
it's a static private data type used once.  The elements get bumped
up to uint32_t to avoid future maintenance issues if PCI_ANY_ID gets
used for a blacklist entry (avoiding an actual hardware match).  Our
test loop is also crying out to be simplified as a for loop.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Alex Williamson 2015-09-23 13:04:45 -06:00
parent c00d61d8fa
commit 056dfcb695
3 changed files with 28 additions and 20 deletions
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38
hw/vfio/pci-quirks.c
View File

@ -14,6 +14,19 @@
#include "trace.h"
#include "qemu/range.h"
#define PCI_ANY_ID (~0)
/* Use uin32_t for vendor & device so PCI_ANY_ID expands and cannot match hw */
static bool vfio_pci_is(VFIOPCIDevice *vdev, uint32_t vendor, uint32_t device)
{
PCIDevice *pdev = &vdev->pdev;
return (vendor == PCI_ANY_ID ||
vendor == pci_get_word(pdev->config + PCI_VENDOR_ID)) &&
(device == PCI_ANY_ID ||
device == pci_get_word(pdev->config + PCI_DEVICE_ID));
}
/*
* List of device ids/vendor ids for which to disable
* option rom loading. This avoids the guest hangs during rom
@ -27,28 +40,25 @@
* your card/environment details and information that could
* help in debugging to the bug tracking this issue
*/
static const VFIORomBlacklistEntry romblacklist[] = {
/* Broadcom BCM 57810 */
{ 0x14e4, 0x168e }
static const struct {
uint32_t vendor;
uint32_t device;
} romblacklist[] = {
{ 0x14e4, 0x168e }, /* Broadcom BCM 57810 */
};
bool vfio_blacklist_opt_rom(VFIOPCIDevice *vdev)
{
PCIDevice *pdev = &vdev->pdev;
uint16_t vendor_id, device_id;
int count = 0;
int i;
vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID);
device_id = pci_get_word(pdev->config + PCI_DEVICE_ID);
while (count < ARRAY_SIZE(romblacklist)) {
if (romblacklist[count].vendor_id == vendor_id &&
romblacklist[count].device_id == device_id) {
for (i = 0 ; i < ARRAY_SIZE(romblacklist); i++) {
if (vfio_pci_is(vdev, romblacklist[i].vendor, romblacklist[i].device)) {
trace_vfio_quirk_rom_blacklisted(vdev->vbasedev.name,
romblacklist[i].vendor,
romblacklist[i].device);
return true;
}
count++;
}
return false;
}

5
hw/vfio/pci.h
View File

@ -150,11 +150,6 @@ typedef struct VFIOPCIDevice {
bool no_kvm_msix;
} VFIOPCIDevice;
typedef struct VFIORomBlacklistEntry {
uint16_t vendor_id;
uint16_t device_id;
} VFIORomBlacklistEntry;
uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len);
void vfio_pci_write_config(PCIDevice *pdev,
uint32_t addr, uint32_t val, int len);

3
trace-events
View File

@ -1585,6 +1585,9 @@ vfio_pci_reset(const char *name) " (%s)"
vfio_pci_reset_flr(const char *name) "%s FLR/VFIO_DEVICE_RESET"
vfio_pci_reset_pm(const char *name) "%s PCI PM Reset"
# hw/vfio/pci-quirks.
vfio_quirk_rom_blacklisted(const char *name, uint16_t vid, uint16_t did) "%s %04x:%04x"
# hw/vfio/vfio-common.c
vfio_region_write(const char *name, int index, uint64_t addr, uint64_t data, unsigned size) " (%s:region%d+0x%"PRIx64", 0x%"PRIx64 ", %d)"
vfio_region_read(char *name, int index, uint64_t addr, unsigned size, uint64_t data) " (%s:region%d+0x%"PRIx64", %d) = 0x%"PRIx64