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

To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] [PATCH 3/4] rombios interface for HVM S3
From: "Ke, Liping" <liping.ke@xxxxxxxxx>
Date: 2008年5月20日 15:03:10 +0800
Delivery-date: 2008年5月20日 00:04:25 -0700
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Thread-topic: [PATCH 3/4] rombios interface for HVM S3
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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