[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PULL v2 014/106] pc: add 'etc/reserved-memory-end' fw_cfg
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PULL v2 014/106] pc: add 'etc/reserved-memory-end' fw_cfg interface for SeaBIOS |
Date: |
Wed, 18 Jun 2014 19:16:27 +0300 |
From: Igor Mammedov <address@hidden>
'etc/reserved-memory-end' will allow QEMU to tell BIOS where PCI
BARs mapping could safely start in high memory.
Allowing BIOS to start mapping 64-bit PCI BARs at address where it
wouldn't conflict with other mappings QEMU might place before it.
That permits QEMU to reserve extra address space before
64-bit PCI hole for memory hotplug.
Signed-off-by: Igor Mammedov <address@hidden>
Acked-by: Peter Crosthwaite <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
include/hw/i386/pc.h | 1 +
hw/i386/pc.c | 9 ++++++++-
hw/i386/pc_piix.c | 3 +++
hw/i386/pc_q35.c | 3 +++
4 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 48d4c5e..501d9a0 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -77,6 +77,7 @@ struct PcGuestInfo {
uint64_t *node_cpu;
FWCfgState *fw_cfg;
bool has_acpi_build;
+ bool has_reserved_memory;
};
/* parallel.c */
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 366e799..830aeee 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1226,7 +1226,8 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory,
}
/* initialize hotplug memory address space */
- if (ram_size < machine->maxram_size) {
+ if (guest_info->has_reserved_memory &&
+ (ram_size < machine->maxram_size)) {
ram_addr_t hotplug_mem_size =
machine->maxram_size - ram_size;
@@ -1266,6 +1267,12 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory,
fw_cfg = bochs_bios_init();
rom_set_fw(fw_cfg);
+ if (guest_info->has_reserved_memory && pcms->hotplug_memory_base) {
+ uint64_t *val = g_malloc(sizeof(*val));
+ *val = cpu_to_le64(ROUND_UP(pcms->hotplug_memory_base, 0x1ULL << 30));
+ fw_cfg_add_file(fw_cfg, "etc/reserved-memory-end", val, sizeof(*val));
+ }
+
if (linux_boot) {
load_linux(fw_cfg, kernel_filename, initrd_filename, kernel_cmdline,
below_4g_mem_size);
}
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index abb599b..e133b6a 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -67,6 +67,7 @@ static bool smbios_legacy_mode;
* pages in the host.
*/
static bool gigabyte_align = true;
+static bool has_reserved_memory = true;
/* PC hardware initialisation */
static void pc_init1(MachineState *machine,
@@ -143,6 +144,7 @@ static void pc_init1(MachineState *machine,
guest_info->has_pci_info = has_pci_info;
guest_info->isapc_ram_fw = !pci_enabled;
+ guest_info->has_reserved_memory = has_reserved_memory;
if (smbios_defaults) {
MachineClass *mc = MACHINE_GET_CLASS(machine);
@@ -267,6 +269,7 @@ static void pc_init_pci(MachineState *machine)
static void pc_compat_2_0(MachineState *machine)
{
smbios_legacy_mode = true;
+ has_reserved_memory = false;
}
static void pc_compat_1_7(MachineState *machine)
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index d211393..0e77476 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -57,6 +57,7 @@ static bool smbios_legacy_mode;
* pages in the host.
*/
static bool gigabyte_align = true;
+static bool has_reserved_memory = true;
/* PC hardware initialisation */
static void pc_q35_init(MachineState *machine)
@@ -130,6 +131,7 @@ static void pc_q35_init(MachineState *machine)
guest_info->has_pci_info = has_pci_info;
guest_info->isapc_ram_fw = false;
guest_info->has_acpi_build = has_acpi_build;
+ guest_info->has_reserved_memory = has_reserved_memory;
if (smbios_defaults) {
MachineClass *mc = MACHINE_GET_CLASS(machine);
@@ -245,6 +247,7 @@ static void pc_q35_init(MachineState *machine)
static void pc_compat_2_0(MachineState *machine)
{
smbios_legacy_mode = true;
+ has_reserved_memory = false;
}
static void pc_compat_1_7(MachineState *machine)
--
MST
- [Qemu-devel] [PULL v2 001/106] pc: create custom generic PC machine type, (continued)
- [Qemu-devel] [PULL v2 001/106] pc: create custom generic PC machine type, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 002/106] pc: ACPI BIOS: use enum for defining memory affinity flags, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 003/106] object_add: allow completion handler to get canonical path, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 004/106] vl.c: daemonize before guest memory allocation, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 005/106] add memdev backend infrastructure, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 007/106] qdev: hotplug for bus-less devices, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 009/106] pc: implement pc-dimm device abstraction, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 011/106] pc-dimm: do not allow setting an in-use memdev, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 010/106] memory: add memory_region_is_mapped() API, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 012/106] pc: initialize memory hotplug address space, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 014/106] pc: add 'etc/reserved-memory-end' fw_cfg interface for SeaBIOS,
Michael S. Tsirkin <=
- [Qemu-devel] [PULL v2 018/106] pc-dimm: add busy slot check and slot auto-allocation, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 021/106] trace: add acpi memory hotplug IO region events, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 022/106] trace: pc: add PC_DIMM slot & address allocation, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 023/106] acpi:piix4: allow plug/unlug callbacks handle not only PCI devices, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 025/106] pc: ich9 lpc: make it work with global/compat properties, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 024/106] acpi:piix4: add memory hotplug handling, Michael S. Tsirkin, 2014/06/18
- [Qemu-devel] [PULL v2 026/106] acpi:ich9: add memory hotplug handling, Michael S. Tsirkin, 2014/06/18