path: root/qemu-options.hx
diff options
authorMatthew Ogilvie <mmogilvi_qemu@miniinfo.net>2012-08-23 00:24:43 -0600
committermalc <av1474@comtv.ru>2012-08-24 07:44:39 +0400
commitf278d4947fff814dcde2ef2acad36d172ff8be35 (patch)
treec483f5871bb83294728a3b3026206c56ad7485a9 /qemu-options.hx
parent482f7bf86b43af9f6903c52726fedf82b28bf953 (diff)
i8259: add -no-spurious-interrupt-hack option
This patch provides a way to optionally suppress spurious interrupts, as a workaround for systems described below: Some old operating systems do not handle spurious interrupts well, and qemu tends to generate them significantly more often than real hardware. Examples: - Microport UNIX System V/386 v 2.1 (ca 1987) (The main problem I'm fixing: Without this patch, it panics sporadically when accessing the hard disk.) - AT&T UNIX System V/386 Release 4.0 Version 2.1a (ca 1991) See screenshot in "QEMU Official OS Support List": http://www.claunia.com/qemu/objectManager.php?sClass=application&iId=9 (I don't have this system to test.) - A report about OS/2 boot lockup from 2004 by Hampa Hug: http://lists.nongnu.org/archive/html/qemu-devel/2004-09/msg00367.html (My patch was partially inspired by his.) Also: http://lists.nongnu.org/archive/html/qemu-devel/2005-06/msg00243.html (I don't have this system to test.) Signed-off-by: Matthew Ogilvie <mmogilvi_qemu@miniinfo.net> Signed-off-by: malc <av1474@comtv.ru>
Diffstat (limited to 'qemu-options.hx')
1 files changed, 12 insertions, 0 deletions
diff --git a/qemu-options.hx b/qemu-options.hx
index 0682338e9f..2a6d829551 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1189,6 +1189,18 @@ Windows 2000 is installed, you no longer need this option (this option
slows down the IDE transfers).
+DEF("no-spurious-interrupt-hack", 0, QEMU_OPTION_no_spurious_interrupt_hack,
+ "-no-spurious-interrupt-hack disable delivery of spurious interrupts\n",
+@item -no-spurious-interrupt-hack
+@findex -no-spurious-interrupt-hack
+Use it as a workaround for operating systems that drive PICs in a way that
+can generate spurious interrupts, but the OS doesn't handle spurious
+interrupts gracefully. (e.g. late 80s/early 90s versions of ATT UNIX
+and derivatives)
HXCOMM Deprecated by -rtc
DEF("rtc-td-hack", 0, QEMU_OPTION_rtc_td_hack, "", QEMU_ARCH_I386)