From patchwork Wed Dec 19 07:22:10 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: don't boot from un-selected devices Date: Tue, 18 Dec 2012 21:22:10 -0000 From: Amos Kong X-Patchwork-Id: 207247 Message-Id: <1355901730-24350-1-git-send-email-akong@redhat.com> To: kevin@koconnor.net Cc: alex.williamson@redhat.com, Amos Kong , dallan@redhat.com, qemu-devel@nongnu.org, gleb@redhat.com Current seabios will try to boot from selected devices first, if they are all failed, seabios will also try to boot from un-selected devices. For example: @ qemu-kvm -boot order=n,menu=on ... Guest will boot from network first, if it's failed, guest will try to boot from other un-selected devices (floppy, cdrom, disk) one by one. Sometimes, user don't want to boot from some devices. This patch changes seabios to boot only from selected devices. If user choose first boot device from menu, then seabios will try all the devices, even some of them are not selected. Signed-off-by: Amos Kong --- src/boot.c | 13 ++++++++----- 1 files changed, 8 insertions(+), 5 deletions(-) diff --git a/src/boot.c b/src/boot.c index 3ca7960..ee810ac 100644 --- a/src/boot.c +++ b/src/boot.c @@ -424,6 +424,10 @@ interactive_bootmenu(void) maxmenu++; printf("%d. %s\n", maxmenu , strtcpy(desc, pos->description, ARRAY_SIZE(desc))); + /* If user chooses first boot device from menu, we will treat + all the devices as selected. */ + if (pos->priority == DEFAULT_PRIO) + pos->priority = DEFAULT_PRIO - 1; pos = pos->next; } @@ -490,7 +494,10 @@ boot_prep(void) // Map drives and populate BEV list struct bootentry_s *pos = BootList; - while (pos) { + + /* The priority of un-selected device is not changed, + we only boot from user selected devices. */ + while (pos && pos->priority != DEFAULT_PRIO) { switch (pos->type) { case IPL_TYPE_BCV: call_bcv(pos->vector.seg, pos->vector.offset); @@ -513,10 +520,6 @@ boot_prep(void) } pos = pos->next; } - - // If nothing added a floppy/hd boot - add it manually. - add_bev(IPL_TYPE_FLOPPY, 0); - add_bev(IPL_TYPE_HARDDISK, 0); }