This patch adds a address space hole for 64bit PCI ressources.
It starts at 0x80 (512 GB) and ends at 0x100 (1 TB),
thus has 512 GB in size. This matches what the seabios is doing
(latest master branch).
Signed-off-by: Gerd Hoffmann
---
hw/pc.c | 17 ++---
hw/pc.h |6 ++
hw/pc_piix.c | 22 ++
3 files changed, 30 insertions(+), 15 deletions(-)
diff --git a/hw/pc.c b/hw/pc.c
index 4d34a33..de1b297 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -981,12 +981,13 @@ void pc_memory_init(MemoryRegion *system_memory,
const char *initrd_filename,
ram_addr_t below_4g_mem_size,
ram_addr_t above_4g_mem_size,
+ram_addr_t above_1t_mem_size,
MemoryRegion *rom_memory,
MemoryRegion **ram_memory)
{
int linux_boot, i;
MemoryRegion *ram, *option_rom_mr;
-MemoryRegion *ram_below_4g, *ram_above_4g;
+MemoryRegion *ram_below_4g, *ram_above_4g, *ram_above_1t;
void *fw_cfg;
linux_boot = (kernel_filename != NULL);
@@ -997,7 +998,9 @@ void pc_memory_init(MemoryRegion *system_memory,
*/
ram = g_malloc(sizeof(*ram));
memory_region_init_ram(ram, "pc.ram",
- below_4g_mem_size + above_4g_mem_size);
+ below_4g_mem_size +
+ above_4g_mem_size +
+ above_1t_mem_size);
vmstate_register_ram_global(ram);
*ram_memory = ram;
ram_below_4g = g_malloc(sizeof(*ram_below_4g));
@@ -1008,9 +1011,17 @@ void pc_memory_init(MemoryRegion *system_memory,
ram_above_4g = g_malloc(sizeof(*ram_above_4g));
memory_region_init_alias(ram_above_4g, "ram-above-4g", ram,
below_4g_mem_size, above_4g_mem_size);
-memory_region_add_subregion(system_memory, 0x1ULL,
+memory_region_add_subregion(system_memory, PCI_HOLE_END,
ram_above_4g);
}
+if (above_1t_mem_size > 0) {
+ram_above_1t = g_malloc(sizeof(*ram_above_1t));
+memory_region_init_alias(ram_above_1t, "ram-above-1t", ram,
+ below_4g_mem_size + above_4g_mem_size,
+ above_1t_mem_size);
+memory_region_add_subregion(system_memory, PCI_HOLE64_END,
+ram_above_1t);
+}
/* Initialize PC system firmware */
diff --git a/hw/pc.h b/hw/pc.h
index 74d3369..0c5e14e 100644
--- a/hw/pc.h
+++ b/hw/pc.h
@@ -12,6 +12,11 @@
/* PC-style peripherals (also used by other machines). */
+#define PCI_HOLE_START 0xe000ULL
+#define PCI_HOLE_END 0x0001ULL
+#define PCI_HOLE64_START 0x0080ULL
+#define PCI_HOLE64_END 0x0100ULL
+
/* serial.c */
SerialState *serial_init(int base, qemu_irq irq, int baudbase,
@@ -112,6 +117,7 @@ void pc_memory_init(MemoryRegion *system_memory,
const char *initrd_filename,
ram_addr_t below_4g_mem_size,
ram_addr_t above_4g_mem_size,
+ram_addr_t above_1t_mem_size,
MemoryRegion *rom_memory,
MemoryRegion **ram_memory);
qemu_irq *pc_allocate_cpu_irq(void);
diff --git a/hw/pc_piix.c b/hw/pc_piix.c
index 6a75718..27f990f 100644
--- a/hw/pc_piix.c
+++ b/hw/pc_piix.c
@@ -133,7 +133,7 @@ static void pc_init1(MemoryRegion *system_memory,
int kvmclock_enabled)
{
int i;
-ram_addr_t below_4g_mem_size, above_4g_mem_size;
+ram_addr_t below_4g_mem_size, above_4g_mem_size, above_1t_mem_size;
PCIBus *pci_bus;
ISABus *isa_bus;
PCII440FXState *i440fx_state;
@@ -157,13 +157,10 @@ static void pc_init1(MemoryRegion *system_memory,
kvmclock_create();
}
-if (ram_size >= 0xe000 ) {
-above_4g_mem_size = ram_size - 0xe000;
-below_4g_mem_size = 0xe000;
-} else {
-above_4g_mem_size = 0;
-below_4g_mem_size = ram_size;
-}
+below_4g_mem_size = MIN(ram_size, PCI_HOLE_START);
+above_4g_mem_size = MIN(ram_size - below_4g_mem_size,
+PCI_HOLE64_START - PCI_HOLE_END);
+above_1t_mem_size = ram_size - below_4g_mem_size - above_4g_mem_size;
if (pci_enabled) {
pci_memory = g_new(MemoryRegion, 1);
@@ -178,7 +175,7 @@ static void pc_init1(MemoryRegion *system_memory,
if (!xen_enabled()) {
pc_memory_init(system_memory,
kernel_filename, kernel_cmdline, initrd_filename,
- below_4g_mem_size, above_4g_mem_size,
+ below_4g_mem_size, above_4g_mem_size, above_1t_mem_size,
pci_enabled ? rom_memory : system_memory, &ram_memory);
}
@@ -195,11 +192,12 @@ static void pc_init1(MemoryRegion *system_memory,
pci_bus =
