motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 00:03:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

hw/i386: add a separate region that tracks the SMRAME bit

Browse source 
This region is exported at /machine/smram.  It is "empty" if
SMRAME=0 and points to SMRAM if SMRAME=1.  The CPU will
enable/disable it as it enters or exits SMRAM.

While touching nearby code, the existing memory region setup was
slightly inconsistent.  The smram_region is *disabled* in order to open
SMRAM (because the smram_region shows the low VRAM instead of the RAM
at 0xa0000).  Because SMRAM is closed at startup, the smram_region must
be enabled when creating the i440fx or q35 devices.

Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-03-31 14:10:22 +02:00
parent 2001d0cd6d
commit fe6567d5fd
3 changed files with 32 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

1
include/hw/pci-host/q35.h
View file

@ -53,6 +53,7 @@ typedef struct MCHPCIState {
MemoryRegion *address_space_io;
PAMMemoryRegion pam_regions[13];
MemoryRegion smram_region;
MemoryRegion smram, low_smram;
PcPciInfo pci_info;
uint8_t smm_enabled;
ram_addr_t below_4g_mem_size;