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[v4,07/14] tools/lguest: force disable tboot and apm

Message ID 1459987594-5434-8-git-send-email-mcgrof@kernel.org (mailing list archive)
State New, archived
Headers show

Commit Message

Luis Chamberlain April 7, 2016, 12:06 a.m. UTC
The paravirt_enabled() check is going away, the area tossed to
the kernel on lguest is not zerored out, so ensure lguest force
disables tboot and apm just in case the kernel file being read might
have this set for whatever reason.

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
---
 tools/lguest/lguest.c | 6 ++++++
 1 file changed, 6 insertions(+)

Comments

Rusty Russell April 11, 2016, 3:32 a.m. UTC | #1
"Luis R. Rodriguez" <mcgrof@kernel.org> writes:
> The paravirt_enabled() check is going away, the area tossed to
> the kernel on lguest is not zerored out, so ensure lguest force
> disables tboot and apm just in case the kernel file being read might
> have this set for whatever reason.
>
> Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>

Nice, thanks!

Acked-by: Rusty Russell <rusty@rustcorp.com.au>

Cheers,
Rusty.
diff mbox

Patch

diff --git a/tools/lguest/lguest.c b/tools/lguest/lguest.c
index ff0aa580c6e1..0aa75af6e862 100644
--- a/tools/lguest/lguest.c
+++ b/tools/lguest/lguest.c
@@ -3357,6 +3357,12 @@  int main(int argc, char *argv[])
 	/* Tell the entry path not to try to reload segment registers. */
 	boot->hdr.loadflags |= KEEP_SEGMENTS;
 
+	/* We don't support tboot */
+	boot->tboot_addr = 0;
+
+	/* Ensure this is 0 to prevent apm from loading */
+	boot->apm_bios_info.version = 0;
+
 	/* We tell the kernel to initialize the Guest. */
 	tell_kernel(start);