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[Xen-devel] [PATCH]ACPI: workaround for S3 fail in two facs tables case
| To: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH]ACPI: workaround for S3 fail in two facs tables case |
| From: | "Wei, Gang" <gang.wei@xxxxxxxxx> |
| Date: | Thu, 25 Feb 2010 13:49:40 +0800 |
| Accept-language: | zh-CN, en-US |
| Acceptlanguage: | zh-CN, en-US |
| Cc: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Delivery-date: | Wed, 24 Feb 2010 21:51:07 -0800 |
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| Thread-index: | Acq13lKhxRtlttZBS6OrDhFD9qjUSw== |
| Thread-topic: | [PATCH]ACPI: workaround for S3 fail in two facs tables case |
ACPI: workaround for S3 fail in two facs tables case
Some legacy BIOS which support ACPI2.0+ may expose two FACS tables via both
FADT->FIRMWARE_CTRL and FADT->X_FIRMWARE_CTRL, but only lookup S3 waking_vector
in the first one. So enhance the X_FIRMWARE_CTRL selection condition by adding
FADT->FIRMWARE_CTRL == 0.
Signed-off-by: Wei Gang <gang.wei@xxxxxxxxx>
diff -r e11c8dcbf690 xen/arch/x86/acpi/boot.c
--- a/xen/arch/x86/acpi/boot.c Wed Feb 24 11:00:11 2010 +0800
+++ b/xen/arch/x86/acpi/boot.c Thu Feb 25 20:47:37 2010 +0800
@@ -365,7 +365,7 @@ acpi_fadt_parse_sleep_info(struct acpi_t
acpi_sinfo.pm1b_evt_blk.address);
/* Now FACS... */
- if (fadt->header.revision >= FADT2_REVISION_ID)
+ if (fadt->header.revision >= FADT2_REVISION_ID && fadt->facs == 0)
facs_pa = fadt->Xfacs;
else
facs_pa = (uint64_t)fadt->facs;
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