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[Qemu-devel] [PATCH] Allow more IDE power management
From: |
Ben Guthro |
Subject: |
[Qemu-devel] [PATCH] Allow more IDE power management |
Date: |
Mon, 27 Aug 2007 16:47:46 -0400 |
User-agent: |
Thunderbird 2.0.0.5 (X11/20070719) |
Made the QEMU IDE disk tolerate more power-mgmt commands, specifically:
WIN_SETFEATURE(EN_AAM) - enable automatic acoustic mgmt
WIN_SETFEATURE(DIS_AAM) - disable automatic acoustic mgmt
WIN_STANDBY
WIN_SETIDLE1
WIN_SLEEPNOW1
WIN_STANDBY2
WIN_SETIDLE2
WIN_SLEEPNOW2
WIN_STANDBYNOW2
These are all essentially no-ops, like existing support for EN_RLA (enable
read lookahead) and WIN_STANDBYNOW1.
This fixes a crash in the SLES9-SP3 64bit kernel when the powersaved was
started (with ACPI or ACM). This guest really only needs EN_AAM, DIS_APM,
and WIN_SETIDLE1 support, but the others seemed sensible to include.
I've excluded EN_APM since I'm unsure of what that's agreeing to do. It's
probably ok to include.
Signed-off-by: Ben Guthro <address@hidden>
Signed-off-by: David Lively <address@hidden>
diff -r 106bc46793ca hw/ide.c
--- a/hw/ide.c Mon Aug 27 16:20:33 2007 -0400
+++ b/hw/ide.c Mon Aug 27 16:27:28 2007 -0400
@@ -1914,6 +1914,8 @@ static void ide_ioport_write(void *opaqu
case 0x67: /* NOP */
case 0x96: /* NOP */
case 0x9a: /* NOP */
+ case 0x42: /* enable Automatic Acoustic Mode */
+ case 0xc2: /* disable Automatic Acoustic Mode */
s->status = READY_STAT | SEEK_STAT;
ide_set_irq(s);
break;
@@ -1952,12 +1954,16 @@ static void ide_ioport_write(void *opaqu
s->status = READY_STAT;
ide_set_irq(s);
break;
+ case WIN_STANDBY:
+ case WIN_STANDBY2:
case WIN_STANDBYNOW1:
case WIN_STANDBYNOW2:
case WIN_IDLEIMMEDIATE:
case CFA_IDLEIMMEDIATE:
case WIN_SETIDLE1:
case WIN_SETIDLE2:
+ case WIN_SLEEPNOW1:
+ case WIN_SLEEPNOW2:
s->status = READY_STAT;
ide_set_irq(s);
break;
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