Initialize the 32-bit and 64-bit pci starting offsets from values passed in by the qemu paravirt interface QEMU_CFG_PCI_WINDOW. Qemu calculates the starting offsets based on initial memory and hotplug-able dimms. It's possible to avoid the new paravirt interface, and calculate pci ranges from srat entries. But the code changes are ugly, see: http://lists.gnu.org/archive/html/qemu-devel/2012-09/msg03548.html --- src/paravirt.c | 6 ++++++ src/paravirt.h | 2 ++ src/pciinit.c | 9 +++++++++ 3 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/src/paravirt.c b/src/paravirt.c index 4b5c441..f7517b9 100644 --- a/src/paravirt.c +++ b/src/paravirt.c @@ -347,3 +347,9 @@ void qemu_cfg_romfile_setup(void) dprintf(3, "Found fw_cfg file: %s (size=%d)\n", file->name, file->size); } } + +void qemu_cfg_get_pci_offsets(u64 *pcimem_start, u64 *pcimem64_start) +{ + qemu_cfg_read_entry(pcimem_start, QEMU_CFG_PCI_WINDOW, sizeof(u64)); + qemu_cfg_read((u8*)(pcimem64_start), sizeof(u64)); +} diff --git a/src/paravirt.h b/src/paravirt.h index a284c41..b53ff88 100644 --- a/src/paravirt.h +++ b/src/paravirt.h @@ -35,6 +35,7 @@ static inline int kvm_para_available(void) #define QEMU_CFG_BOOT_MENU 0x0e #define QEMU_CFG_MAX_CPUS 0x0f #define QEMU_CFG_FILE_DIR 0x19 +#define QEMU_CFG_PCI_WINDOW 0x1a #define QEMU_CFG_ARCH_LOCAL 0x8000 #define QEMU_CFG_ACPI_TABLES (QEMU_CFG_ARCH_LOCAL + 0) #define QEMU_CFG_SMBIOS_ENTRIES (QEMU_CFG_ARCH_LOCAL + 1) @@ -65,5 +66,6 @@ struct e820_reservation { u32 qemu_cfg_e820_entries(void); void* qemu_cfg_e820_load_next(void *addr); void qemu_cfg_romfile_setup(void); +void qemu_cfg_get_pci_offsets(u64 *pcimem_start, u64 *pcimem64_start);
#endif diff --git a/src/pciinit.c b/src/pciinit.c index a406bbd..4103d2d 100644 --- a/src/pciinit.c +++ b/src/pciinit.c @@ -734,6 +734,7 @@ static void pci_bios_map_devices(struct pci_bus *busses) void pci_setup(void) { + u64 pv_pcimem_start, pv_pcimem64_start; if (CONFIG_COREBOOT || usingXen()) { // PCI setup already done by coreboot or Xen - just do probe. pci_probe_devices(); @@ -769,5 +770,13 @@ pci_setup(void)
pci_bios_init_devices();
+ /* if qemu gives us other pci window values, it means there are hotplug-able + * dimms. Adjust accordingly */ + qemu_cfg_get_pci_offsets(&pv_pcimem_start, &pv_pcimem64_start); + if (pv_pcimem_start > pcimem_start) + pcimem_start = pv_pcimem_start; + if (pv_pcimem64_start > pcimem64_start) + pcimem64_start = pv_pcimem64_start; + free(busses); }
-
Vasilis Liaskovitis