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.
Signed-off-by: Vasilis Liaskovitis <vasilis.liaskovi...@profitbricks.com>
---
src/paravirt.c | 6 ++++++
src/paravirt.h | 2 ++
src/pciinit.c | 5 ++---
3 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/src/paravirt.c b/src/paravirt.c
index 2a98d53..390ef30 100644
--- a/src/paravirt.c
+++ b/src/paravirt.c
@@ -346,3 +346,9 @@ 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 68f302a..64468a0 100644
--- a/src/pciinit.c
+++ b/src/pciinit.c
@@ -592,8 +592,7 @@ static void pci_region_map_entries(struct pci_bus *busses,
struct pci_region *r)
static void pci_bios_map_devices(struct pci_bus *busses)
{
- pcimem_start = RamSize;
-
+ qemu_cfg_get_pci_offsets(&pcimem_start, &pcimem64_start);
if (pci_bios_init_root_regions(busses)) {
struct pci_region r64_mem, r64_pref;
r64_mem.list = NULL;
@@ -611,7 +610,7 @@ static void pci_bios_map_devices(struct pci_bus *busses)
u64 align_mem = pci_region_align(&r64_mem);
u64 align_pref = pci_region_align(&r64_pref);
- r64_mem.base = ALIGN(0x100000000LL + RamSizeOver4G, align_mem);
+ r64_mem.base = ALIGN(pcimem64_start, align_mem);
r64_pref.base = ALIGN(r64_mem.base + sum_mem, align_pref);
pcimem64_start = r64_mem.base;
pcimem64_end = r64_pref.base + sum_pref;
--
1.7.9
