diff options
| author | Matthew Ogilvie <mmogilvi_qemu@miniinfo.net> | 2012-08-23 00:24:43 -0600 |
|---|---|---|
| committer | malc <av1474@comtv.ru> | 2012-08-24 07:44:39 +0400 |
| commit | f278d4947fff814dcde2ef2acad36d172ff8be35 (patch) | |
| tree | c483f5871bb83294728a3b3026206c56ad7485a9 /vl.c | |
| parent | 482f7bf86b43af9f6903c52726fedf82b28bf953 (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 'vl.c')
| -rw-r--r-- | vl.c | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -204,6 +204,7 @@ CharDriverState *serial_hds[MAX_SERIAL_PORTS]; CharDriverState *parallel_hds[MAX_PARALLEL_PORTS]; CharDriverState *virtcon_hds[MAX_VIRTIO_CONSOLES]; int win2k_install_hack = 0; +int no_spurious_interrupt_hack = 0; int usb_enabled = 0; int singlestep = 0; int smp_cpus = 1; @@ -3046,6 +3047,9 @@ int main(int argc, char **argv, char **envp) case QEMU_OPTION_win2k_hack: win2k_install_hack = 1; break; + case QEMU_OPTION_no_spurious_interrupt_hack: + no_spurious_interrupt_hack = 1; + break; case QEMU_OPTION_rtc_td_hack: { static GlobalProperty slew_lost_ticks[] = { { |