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-rw-r--r--arch/mips/kernel/traps.c25
1 files changed, 22 insertions, 3 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 9be3df1fa8a4..cf7ac5483f53 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -13,6 +13,7 @@
*/
#include <linux/bug.h>
#include <linux/compiler.h>
+#include <linux/kexec.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
@@ -409,6 +410,9 @@ void __noreturn die(const char *str, struct pt_regs *regs)
panic("Fatal exception");
}
+ if (regs && kexec_should_crash(current))
+ crash_kexec(regs);
+
do_exit(sig);
}
@@ -1021,6 +1025,24 @@ asmlinkage void do_cpu(struct pt_regs *regs)
return;
+ case 3:
+ /*
+ * Old (MIPS I and MIPS II) processors will set this code
+ * for COP1X opcode instructions that replaced the original
+ * COP3 space. We don't limit COP1 space instructions in
+ * the emulator according to the CPU ISA, so we want to
+ * treat COP1X instructions consistently regardless of which
+ * code the CPU chose. Therefore we redirect this trap to
+ * the FP emulator too.
+ *
+ * Then some newer FPU-less processors use this code
+ * erroneously too, so they are covered by this choice
+ * as well.
+ */
+ if (raw_cpu_has_fpu)
+ break;
+ /* Fall through. */
+
case 1:
if (used_math()) /* Using the FPU again. */
own_fpu(1);
@@ -1044,9 +1066,6 @@ asmlinkage void do_cpu(struct pt_regs *regs)
case 2:
raw_notifier_call_chain(&cu2_chain, CU2_EXCEPTION, regs);
return;
-
- case 3:
- break;
}
force_sig(SIGILL, current);