[Xen-devel] [PATCH 3/4] rombios interface for HVM S3

["Ke, Liping" <liping.ke@xxxxxxxxx>]

This patch has no change.

[PATCH 3/4] rombios interface for HVM S3
 - add S3 package in ACPI DSDT table. Guest OS will get S3 value from
this package and write the value to PM1A control register to trigger S3
suspend.
 - Add S3 resume logic in rombios post code. the CMOS shutdown register
   is used to indicate if this is a S3 resume.
 - if it is s3 resume, rombios will get wakeup vector from ACPI FACS
   table and jump to wakeup vector. Per ACPI spec, the wakeup vector
   jumping must be the forms CS:IP, in which CS=(wakeup vector>>4)
   IP=(wakeup vector)&0xF, for example, for vector=0x12345,
   CS:IP=0x1234:0x5
Note: clobber_entry_point will clobber the post entry, which make S3
resume not work. We will directly jmp to POST Entry if it in S3
Resume path.

Signed-off-by: Yu Ke <ke.yu@xxxxxxxxx>
Signed-off-by: Ke Liping <liping.ke@xxxxxxxxx>

Attachment: rombios.patch
Description: rombios.patch

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