linux-kernel - Re: [Lguest] lguest: unhandled trap

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Date:	Mon, 20 Oct 2008 10:39:06 +1100
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	lguest@...abs.org
Cc:	Tiago Maluta <maluta_tiago@...oo.com.br>,
	linux-kernel@...r.kernel.org, Jeremy Fitzhardinge <jeremy@...p.org>
Subject: Re: [Lguest] lguest: unhandled trap

On Sunday 19 October 2008 10:36:51 Tiago Maluta wrote:
> Hi,
>
> I'm using 2.6.27-05323-g26e9a39 and when I try to use lguest:
>
> ~#Documentation/lguest/lguest 128 vmlinux
> lguest: unhandled trap 14 at 0xc0594f6a (0xff900000)

Yes, I found the same issue.  Does this fix it for you?

Subject: lguest: don't try DMI

dmi_scan_machine breaks under lguest; this is the simplest fix (though
ugly).  Perhaps this hurts Xen too?

Error:
	lguest: unhandled trap 14 at 0xc04edeae (0xffa00000)

Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>

diff -r 47449cd8e3d8 drivers/firmware/dmi_scan.c
--- a/drivers/firmware/dmi_scan.c	Fri Oct 17 12:14:40 2008 +1100
+++ b/drivers/firmware/dmi_scan.c	Fri Oct 17 20:54:30 2008 +1100
@@ -369,6 +369,11 @@ void __init dmi_scan_machine(void)
 	char __iomem *p, *q;
 	int rc;
 
+#ifdef CONFIG_PARAVIRT
+	if (strcmp(pv_info.name, "lguest") == 0)
+		goto error;
+#endif
+
 	if (efi_enabled) {
 		if (efi.smbios == EFI_INVALID_TABLE_ADDR)
 			goto error;



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