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From 6ddf29f50854ed657ee27241cbd0bb7c2b4ae4b7 Mon Sep 17 00:00:00 2001
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Message-Id: <6ddf29f50854ed657ee27241cbd0bb7c2b4ae4b7.1383564115.git.minovotn@redhat.com>
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In-Reply-To: <5575e0aec51f40ebec46e98ec085cda053283aba.1383564115.git.minovotn@redhat.com>
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References: <5575e0aec51f40ebec46e98ec085cda053283aba.1383564115.git.minovotn@redhat.com>
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From: Markus Armbruster <armbru@redhat.com>
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Date: Fri, 27 Sep 2013 13:31:15 +0200
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Subject: [PATCH 05/14] pc: Make -no-fd-bootchk stick across boot order
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changes
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RH-Author: Markus Armbruster <armbru@redhat.com>
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Message-id: <1380288680-26645-6-git-send-email-armbru@redhat.com>
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Patchwork-id: 54564
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O-Subject: [PATCH 7.0 qemu-kvm 05/10] pc: Make -no-fd-bootchk stick across boot order changes
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Bugzilla: 997817
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
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From: Markus Armbruster <armbru@redhat.com>
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Option -no-fd-bootchk asks the BIOS to attempt booting from a floppy
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even when the boot sector signature isn't there, by setting a bit in
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RTC CMOS. It was added back in 2006 (commit 52ca8d6a).
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Two years later, commit 0ecdffbb added monitor command boot_set.
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Implemented by new function pc_boot_set(). It unconditionally clears
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the floppy signature bit in CMOS.
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Commit e0f084bf added -boot option once to automatically change the
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boot order on first reset. Reuses pc_boot_set(), thus also clears the
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floppy signature bit. Commit d9346e81 took care to preserve this
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behavior.
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Thus, -no-fd-bootchk applies to any number of boots. Except it
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applies just to the first boot with -boot once, and never after
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boot_set. Weird. Make it stick instead: set the bit according to
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-no-fd-bootchk in pc_boot_set().
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Signed-off-by: Markus Armbruster <armbru@redhat.com>
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Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
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Message-id: 1371208516-7857-6-git-send-email-armbru@redhat.com
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Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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(cherry picked from commit e1123015a50abf44f9daa9495f40eeaaf4c9bb98)
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---
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hw/i386/pc.c | 7 +++----
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1 file changed, 3 insertions(+), 4 deletions(-)
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Signed-off-by: Michal Novotny <minovotn@redhat.com>
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---
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hw/i386/pc.c | 7 +++----
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1 file changed, 3 insertions(+), 4 deletions(-)
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diff --git a/hw/i386/pc.c b/hw/i386/pc.c
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index 71b7a26..3c77040 100644
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--- a/hw/i386/pc.c
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+++ b/hw/i386/pc.c
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@@ -266,7 +266,7 @@ static int boot_device2nibble(char boot_device)
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return 0;
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}
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-static int set_boot_dev(ISADevice *s, const char *boot_device, int fd_bootchk)
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+static int set_boot_dev(ISADevice *s, const char *boot_device)
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{
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#define PC_MAX_BOOT_DEVICES 3
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int nbds, bds[3] = { 0, };
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@@ -292,7 +292,7 @@ static int set_boot_dev(ISADevice *s, const char *boot_device, int fd_bootchk)
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static int pc_boot_set(void *opaque, const char *boot_device)
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{
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- return set_boot_dev(opaque, boot_device, 0);
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+ return set_boot_dev(opaque, boot_device);
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}
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typedef struct pc_cmos_init_late_arg {
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@@ -407,8 +407,7 @@ void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
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cpu_hotplug_cb.cpu_added_notifier.notify = rtc_notify_cpu_added;
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qemu_register_cpu_added_notifier(&cpu_hotplug_cb.cpu_added_notifier);
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- /* set boot devices, and disable floppy signature check if requested */
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- if (set_boot_dev(s, boot_device, fd_bootchk)) {
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+ if (set_boot_dev(s, boot_device)) {
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exit(1);
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}
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--
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1.7.11.7
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