qemu: Allow more IDE power management.

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_SETFEATURE(DIS_APM) - disable automatic power 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 <bguthro@virtualiron.com>
Signed-off-by: David Lively <dlively@virtualiron.com>

diff --git a/tools/ioemu/hw/ide.c b/tools/ioemu/hw/ide.c
index 3b138c76e4b75938c5f2d52c9a705d5da05aa862..f5e796171ff146c5465696fdc82814354308d1e2 100644 (file)
--- a/tools/ioemu/hw/ide.c
+++ b/tools/ioemu/hw/ide.c
@@ -1876,6 +1876,9 @@ static void ide_ioport_write(void *opaque, uint32_t addr, uint32_t val)
                 break;
             case 0xaa: /* read look-ahead enable */
             case 0x55: /* read look-ahead disable */
+            case 0x42: /* EN_AAM: enable Automatic Acoustic Mode */
+            case 0xc2: /* DIS_AAM: disable Automatic Acoustic Mode */
+            case 0x85: /* DIS_APM: disable APM */
                 s->status = READY_STAT | SEEK_STAT;
                 ide_set_irq(s);
                 break;
@@ -1914,8 +1917,15 @@ static void ide_ioport_write(void *opaque, uint32_t addr, uint32_t val)
            s->status = READY_STAT;
             ide_set_irq(s);
             break;
-       case WIN_STANDBYNOW1:
         case WIN_IDLEIMMEDIATE:
+        case WIN_STANDBY:
+        case WIN_SETIDLE1:
+        case WIN_STANDBYNOW1:
+        case WIN_SLEEPNOW1:
+        case WIN_STANDBY2:
+        case WIN_SETIDLE2:
+        case WIN_STANDBYNOW2:
+        case WIN_SLEEPNOW2:
            s->status = READY_STAT;
             ide_set_irq(s);
             break;