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pc: ACPI BIOS: reserve SRAT entry for hotplug mem hole

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Needed for Windows to use hotplugged memory device, otherwise
it complains that server is not configured for memory hotplug.
Tests shows that aftewards it uses dynamically provided
proximity value from _PXM() method if available.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2014-06-02 15:25:28 +02:00 committed by Michael S. Tsirkin
parent bf1e893959
commit cec65193d4
1 changed files with 17 additions and 0 deletions
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17
hw/i386/acpi-build.c
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@ -1199,6 +1199,10 @@ build_srat(GArray *table_data, GArray *linker,
uint64_t curnode;
int srat_start, numa_start, slots;
uint64_t mem_len, mem_base, next_base;
PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
ram_addr_t hotplugabble_address_space_size =
object_property_get_int(OBJECT(pcms), PC_MACHINE_MEMHP_REGION_SIZE,
NULL);
srat_start = table_data->len;
@ -1263,6 +1267,19 @@ build_srat(GArray *table_data, GArray *linker,
acpi_build_srat_memory(numamem, 0, 0, 0, MEM_AFFINITY_NOFLAGS);
}
/*
* Entry is required for Windows to enable memory hotplug in OS.
* Memory devices may override proximity set by this entry,
* providing _PXM method if necessary.
*/
if (hotplugabble_address_space_size) {
numamem = acpi_data_push(table_data, sizeof *numamem);
acpi_build_srat_memory(numamem, pcms->hotplug_memory_base,
hotplugabble_address_space_size, 0,
MEM_AFFINITY_HOTPLUGGABLE |
MEM_AFFINITY_ENABLED);
}
build_header(linker, table_data,
(void *)(table_data->data + srat_start),
"SRAT",