clearlinux/kvmtool
2
0
Fork 0
mirror of https://github.com/clearlinux/kvmtool.git synced 2026-09-04 04:31:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

kvm, pci: Fix unaligned PCI accesses

Browse Source 
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
This commit is contained in:
Pekka Enberg
2015-06-01 16:39:40 +01:00
committed by Will Deacon
parent 18ae021a54
commit e4d2cea2da
1 changed files with 14 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
pci.c
+14 -3
View File
@@ -56,10 +56,18 @@ static bool pci_device_matches(uint8_t bus_number, uint8_t device_number, uint8_
static bool pci_config_data_in(struct kvm *self, uint16_t port, void *data, int size, uint32_t count)
{
unsigned long start;
/*
* If someone accesses PCI configuration space offsets that are not
* aligned to 4 bytes, it uses iports to signify that.
*/
start = port - PCI_CONFIG_ADDRESS;
if (pci_device_matches(0, 1, 0)) {
unsigned long offset;
offset = pci_config_address.register_number << 2;
offset = start + (pci_config_address.register_number << 2);
if (offset < sizeof(struct pci_device_header)) {
void *p = &virtio_device;
@@ -79,6 +87,9 @@ static struct ioport_operations pci_config_data_ops = {
void pci__init(void)
{
ioport__register(PCI_CONFIG_DATA, &pci_config_data_ops);
ioport__register(PCI_CONFIG_ADDRESS, &pci_config_address_ops);
ioport__register(PCI_CONFIG_DATA, &pci_config_data_ops);
ioport__register(PCI_CONFIG_ADDRESS + 0, &pci_config_address_ops);
ioport__register(PCI_CONFIG_ADDRESS + 1, &pci_config_address_ops);
ioport__register(PCI_CONFIG_ADDRESS + 2, &pci_config_address_ops);
ioport__register(PCI_CONFIG_ADDRESS + 3, &pci_config_address_ops);
}