From e1123015a50abf44f9daa9495f40eeaaf4c9bb98 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Fri, 14 Jun 2013 13:15:05 +0200 Subject: [PATCH] pc: Make -no-fd-bootchk stick across boot order changes Option -no-fd-bootchk asks the BIOS to attempt booting from a floppy even when the boot sector signature isn't there, by setting a bit in RTC CMOS. It was added back in 2006 (commit 52ca8d6a). Two years later, commit 0ecdffbb added monitor command boot_set. Implemented by new function pc_boot_set(). It unconditionally clears the floppy signature bit in CMOS. Commit e0f084bf added -boot option once to automatically change the boot order on first reset. Reuses pc_boot_set(), thus also clears the floppy signature bit. Commit d9346e81 took care to preserve this behavior. Thus, -no-fd-bootchk applies to any number of boots. Except it applies just to the first boot with -boot once, and never after boot_set. Weird. Make it stick instead: set the bit according to -no-fd-bootchk in pc_boot_set(). Signed-off-by: Markus Armbruster Reviewed-by: Anthony Liguori Message-id: 1371208516-7857-6-git-send-email-armbru@redhat.com Signed-off-by: Anthony Liguori --- hw/i386/pc.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/hw/i386/pc.c b/hw/i386/pc.c index e0fbb86..5e8f143 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -266,7 +266,7 @@ static int boot_device2nibble(char boot_device) return 0; } -static int set_boot_dev(ISADevice *s, const char *boot_device, int fd_bootchk) +static int set_boot_dev(ISADevice *s, const char *boot_device) { #define PC_MAX_BOOT_DEVICES 3 int nbds, bds[3] = { 0, }; @@ -292,7 +292,7 @@ static int set_boot_dev(ISADevice *s, const char *boot_device, int fd_bootchk) static int pc_boot_set(void *opaque, const char *boot_device) { - return set_boot_dev(opaque, boot_device, 0); + return set_boot_dev(opaque, boot_device); } typedef struct pc_cmos_init_late_arg { @@ -407,8 +407,7 @@ void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size, cpu_hotplug_cb.cpu_added_notifier.notify = rtc_notify_cpu_added; qemu_register_cpu_added_notifier(&cpu_hotplug_cb.cpu_added_notifier); - /* set boot devices, and disable floppy signature check if requested */ - if (set_boot_dev(s, boot_device, fd_bootchk)) { + if (set_boot_dev(s, boot_device)) { exit(1); } -- 2.7.4