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pc: memhotplug: fix incorrectly set reserved-memory-end

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reserved-memory-end tells firmware address from which
it could start treating memory as PCI address space
and map PCI BARs after it to avoid collisions with
RAM.
Currently it is incorrectly pointing to address where
hotplugged memory range starts which could redirect
hotplugged RAM accesses to PCI BARs when firmware
maps them over RAM or viceverse.
Fix this by pointing reserved-memory-end to the end
of memory hotplug area.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Igor Mammedov 2015-09-07 13:55:31 +02:00 committed by Michael S. Tsirkin
parent 9372e3f567
commit 3385e8e264
1 changed files with 3 additions and 1 deletions
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4
hw/i386/pc.c
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@ -1412,7 +1412,9 @@ FWCfgState *pc_memory_init(PCMachineState *pcms,
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));
uint64_t res_mem_end = pcms->hotplug_memory.base +
memory_region_size(&pcms->hotplug_memory.mr);
*val = cpu_to_le64(ROUND_UP(res_mem_end, 0x1ULL << 30));
fw_cfg_add_file(fw_cfg, "etc/reserved-memory-end", val, sizeof(*val));
}