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[Qemu-devel] [PATCH] x86: Reboot CPU on triple fault - Version 3
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] [PATCH] x86: Reboot CPU on triple fault - Version 3 |
Date: |
Wed, 16 Apr 2008 14:44:32 +0200 |
User-agent: |
Thunderbird 2.0.0.12 (X11/20080226) |
Here comes a version that may hopefully make everyone happy: :)
Reset on triple fault, but only dump the CPU state to stderr and logfile
if -triple-fault was given as command line option.
Signed-off-by: Jan Kiszka <address@hidden>
---
dyngen-exec.h | 1 +
target-i386/helper.c | 24 ++++++++++++++++++++++--
vl.c | 9 +++++++++
3 files changed, 32 insertions(+), 2 deletions(-)
Index: b/dyngen-exec.h
===================================================================
--- a/dyngen-exec.h
+++ b/dyngen-exec.h
@@ -86,6 +86,7 @@ typedef struct FILE FILE;
extern int fprintf(FILE *, const char *, ...);
extern int fputs(const char *, FILE *);
extern int printf(const char *, ...);
+extern FILE *stderr;
#undef NULL
#define NULL 0
Index: b/target-i386/helper.c
===================================================================
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -1231,6 +1231,10 @@ void do_interrupt(int intno, int is_int,
}
}
+/* This should come from sysemu.h - if we could include it here... */
+void qemu_system_reset_request(void);
+extern int warn_on_triple_fault;
+
/*
* Check nested exceptions and change to double or triple fault if
* needed. It should only be called, if this is not an interrupt.
@@ -1248,8 +1252,24 @@ static int check_exception(int intno, in
fprintf(logfile, "check_exception old: %x new %x\n",
env->old_exception, intno);
- if (env->old_exception == EXCP08_DBLE)
- cpu_abort(env, "triple fault");
+ if (env->old_exception == EXCP08_DBLE) {
+ if(env->intercept & INTERCEPT_SVM_MASK) {
+ /* most probably the virtual machine should not
+ be shut down but rather caught by the VMM */
+ vmexit(SVM_EXIT_SHUTDOWN, 0);
+ }
+ if (warn_on_triple_fault) {
+ fprintf(stderr, "qemu: warning: triple fault\n");
+ cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU | X86_DUMP_CCOP);
+ if (logfile) {
+ fprintf(logfile, "qemu: warning: triple fault\n");
+ cpu_dump_state(env, logfile, fprintf,
+ X86_DUMP_FPU | X86_DUMP_CCOP);
+ }
+ }
+ qemu_system_reset_request();
+ return EXCP_HLT;
+ }
if ((first_contributory && second_contributory)
|| (env->old_exception == EXCP0E_PAGE &&
Index: b/vl.c
===================================================================
--- a/vl.c
+++ b/vl.c
@@ -200,6 +200,7 @@ CharDriverState *serial_hds[MAX_SERIAL_P
CharDriverState *parallel_hds[MAX_PARALLEL_PORTS];
#ifdef TARGET_I386
int win2k_install_hack = 0;
+int warn_on_triple_fault = 0;
#endif
int usb_enabled = 0;
static VLANState *first_vlan;
@@ -7730,6 +7731,7 @@ static void help(int exitcode)
"-std-vga simulate a standard VGA card with VESA Bochs
Extensions\n"
" (default is CL-GD5446 PCI VGA)\n"
"-no-acpi disable ACPI\n"
+ "-triple-fault enable CPU state dump on triple fault\n"
#endif
#ifdef CONFIG_CURSES
"-curses use a curses/ncurses interface instead of SDL\n"
@@ -7852,6 +7854,7 @@ enum {
QEMU_OPTION_old_param,
QEMU_OPTION_clock,
QEMU_OPTION_startdate,
+ QEMU_OPTION_triple_fault,
};
typedef struct QEMUOption {
@@ -7964,6 +7967,9 @@ const QEMUOption qemu_options[] = {
#endif
{ "clock", HAS_ARG, QEMU_OPTION_clock },
{ "startdate", HAS_ARG, QEMU_OPTION_startdate },
+#if defined(TARGET_I386)
+ { "triple-fault", 0, QEMU_OPTION_triple_fault },
+#endif
{ NULL },
};
@@ -8702,6 +8708,9 @@ int main(int argc, char **argv)
case QEMU_OPTION_win2k_hack:
win2k_install_hack = 1;
break;
+ case QEMU_OPTION_triple_fault:
+ warn_on_triple_fault = 1;
+ break;
#endif
#ifdef USE_KQEMU
case QEMU_OPTION_no_kqemu:
- Re: [Qemu-devel] Re: [PATCH] Reboot CPU on triple fault, (continued)
- [Qemu-devel] [PATCH] x86: Reboot CPU on triple fault - Version 3,
Jan Kiszka <=
- [Qemu-devel] [PATCH] x86: Reboot CPU on triple fault - Version 4, Kevin Wolf, 2008/04/16
- [Qemu-devel] Re: [PATCH] x86: Reboot CPU on triple fault - Version 4, Jan Kiszka, 2008/04/16
- [Qemu-devel] [PATCH] x86: Reboot CPU on triple fault - Version 5, Kevin Wolf, 2008/04/16
- [Qemu-devel] [PATCH] x86: Reboot CPU on triple fault - Version 6, Kevin Wolf, 2008/04/16
- [Qemu-devel] Re: [PATCH] x86: Reboot CPU on triple fault - Version 6, Jan Kiszka, 2008/04/17
- Re: [Qemu-devel] [PATCH] x86: Reboot CPU on triple fault - Version 6, Anthony Liguori, 2008/04/18
- Re: [Qemu-devel] [PATCH] x86: Reboot CPU on triple fault - Version 6, Kevin Wolf, 2008/04/21
- [Qemu-devel] Re: [PATCH] x86: Reboot CPU on triple fault - Version 4, Anthony Liguori, 2008/04/16
- [Qemu-devel] Re: [PATCH] x86: Reboot CPU on triple fault - Version 4, Jan Kiszka, 2008/04/17
- Re: [Qemu-devel] Re: [PATCH] x86: Reboot CPU on triple fault - Version 4, Anthony Liguori, 2008/04/17