# HG changeset patch
# User Keir Fraser <keir@xxxxxxx>
# Date 1289398605 0
# Node ID ec0c3f773c3e2e3f125bc99582c5db1032be3ae7
# Parent 750c0c1e4606c91cd800701ca02e9e180e21c4c5
hvmloader: fix off-by-one-bit error when initialising PCI devices
hvmloader is responsible for - amoungst other things - initialising
the PCI device BARs prior to loading the guest BIOS. The previous
code only probed for devfn up to 128. The lower 3 bits are function
IDs so this meant that only devices in slots 0-15 were actually being
initialized.
Signed-off-by: Alex Zeffertt <alex.zeffertt@xxxxxxxxxxxxx>
Acked-by: Gianni Tedesco <gianni.tedesco@xxxxxxxxxx>
xen-unstable changeset: 22383:cba667fb80cf
xen-unstable date: Wed Nov 10 13:58:16 2010 +0000
hvmloader: Fix 22383:cba667fb80cf iterating over defns 0..255
We need to declare devfn as wider than 8 bits for a loop 0<devfn<256
to terminate.
Signed-off-by: Keir Fraser <keir@xxxxxxx>
xen-unstable changeset: 22384:c19e3371f31b
xen-unstable date: Wed Nov 10 14:15:23 2010 +0000
---
tools/firmware/hvmloader/hvmloader.c | 14 ++++++--------
1 files changed, 6 insertions(+), 8 deletions(-)
diff -r 750c0c1e4606 -r ec0c3f773c3e tools/firmware/hvmloader/hvmloader.c
--- a/tools/firmware/hvmloader/hvmloader.c Tue Nov 09 20:42:20 2010 +0000
+++ b/tools/firmware/hvmloader/hvmloader.c Wed Nov 10 14:16:45 2010 +0000
@@ -196,7 +196,7 @@ static void pci_setup(void)
outb(0x4d1, (uint8_t)(PCI_ISA_IRQ_MASK >> 8));
/* Scan the PCI bus and map resources. */
- for ( devfn = 0; devfn < 128; devfn++ )
+ for ( devfn = 0; devfn < 256; devfn++ )
{
class = pci_readw(devfn, PCI_CLASS_DEVICE);
vendor_id = pci_readw(devfn, PCI_VENDOR_ID);
@@ -466,11 +466,10 @@ static int scan_option_rom(
*/
static int scan_etherboot_nic(uint32_t copy_rom_dest)
{
- uint8_t devfn;
- uint16_t class, vendor_id, device_id;
+ uint16_t class, vendor_id, device_id, devfn;
int rom_size = 0;
- for ( devfn = 0; (devfn < 128) && !rom_size; devfn++ )
+ for ( devfn = 0; (devfn < 256) && !rom_size; devfn++ )
{
class = pci_readw(devfn, PCI_CLASS_DEVICE);
vendor_id = pci_readw(devfn, PCI_VENDOR_ID);
@@ -494,10 +493,9 @@ static int pci_load_option_roms(uint32_t
static int pci_load_option_roms(uint32_t rom_base_addr)
{
uint32_t option_rom_addr, rom_phys_addr = rom_base_addr;
- uint16_t vendor_id, device_id;
- uint8_t devfn, class;
-
- for ( devfn = 0; devfn < 128; devfn++ )
+ uint16_t vendor_id, device_id, devfn, class;
+
+ for ( devfn = 0; devfn < 256; devfn++ )
{
class = pci_readb(devfn, PCI_CLASS_DEVICE + 1);
vendor_id = pci_readw(devfn, PCI_VENDOR_ID);
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