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Date: Fri, 18 Jul 2014 20:40:42 +0000 From: Conrad Kostecki <ck@...rad-kostecki.de> To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Early microcode not being loaded Hi! I'am trying to use the feature of loading early an intel microcode. According to the documentation (early-microcode.txt) that should be possible. I am currently using my own initrd, so I've created a second one, as the docs specified and merged it with my own. Galactica linux # file /tmp/ucode.cpio /tmp/ucode.cpio: ASCII cpio archive (SVR4 with no CRC) Galactica linux # file /tmp/my_own_initrd.cpio /tmp/my_own_initrd.cpio: ASCII cpio archive (SVR4 with no CRC) Galactica linux # cpio -itv < /tmp/ucode.cpio drwxr-xr-x 3 root root 0 Jul 18 17:01 . drwxr-xr-x 3 root root 0 Jul 18 17:01 kernel drwxr-xr-x 3 root root 0 Jul 18 17:01 kernel/x86 drwxr-xr-x 2 root root 0 Jul 18 17:01 kernel/x86/microcode -rw-r--r-- 1 root root 1857432 Jul 18 17:01 kernel/x86/microcode/GenuineIntel.bin Galactica tmp # cpio -itv < /tmp/my_own_initrd.cpio drwxr-xr-x 11 root root 0 Jul 18 22:33 . drwxr-xr-x 3 root root 0 Jul 18 22:33 mnt drwxr-xr-x 2 root root 0 Jul 18 22:33 mnt/root drwxr-xr-x 2 root root 0 Jul 18 22:33 lib64 drwxr-xr-x 2 root root 0 Jul 18 22:33 etc drwxr-xr-x 2 root root 0 Jul 18 22:33 sys drwxr-xr-x 2 root root 0 Jul 18 22:33 bin lrwxrwxrwx 1 root root 12 Jul 18 22:33 bin/ash -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 bin/cat -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 bin/loadkmap -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 bin/cut -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 bin/setfont -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 bin/kbd_mode -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 bin/echo -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 bin/umount -> /bin/busybox -rwxr-xr-x 1 root root 2638208 Jul 18 22:33 bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 bin/mount -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 bin/mdev -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 bin/sleep -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 bin/printf -> /bin/busybox drwxr-xr-x 3 root root 0 Jul 18 22:33 usr drwxr-xr-x 2 root root 0 Jul 18 22:33 usr/bin lrwxrwxrwx 1 root root 12 Jul 18 22:33 usr/bin/setfont -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 usr/bin/kbd_mode -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 usr/bin/printf -> /bin/busybox drwxr-xr-x 3 root root 0 Jul 18 22:33 dev crw-r--r-- 1 root root 5, 1 Jul 18 22:33 dev/console crw-r--r-- 1 root root 4, 64 Jul 18 22:33 dev/ttyS0 crw-r--r-- 1 root root 1, 3 Jul 18 22:33 dev/null crw-r--r-- 1 root root 1, 5 Jul 18 22:33 dev/zero drwxr-xr-x 2 root root 0 Jul 18 22:33 proc -rwxr-xr-x 1 root root 5707 Jul 18 22:33 init lrwxrwxrwx 1 root root 5 Jul 18 22:33 lib -> lib64 drwxr-xr-x 2 root root 0 Jul 18 22:33 sbin lrwxrwxrwx 1 root root 12 Jul 18 22:33 sbin/loadkmap -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 sbin/switch_root -> /bin/busybox lrwxrwxrwx 1 root root 12 Jul 18 22:33 sbin/mdev -> /bin/busybox 5174 blocks Then I merged them, as the docs say: cat /tmp/ucode.cpio /tmp/my_own_initrd.cpio > /boot/initramfs-3.15.5.img Booting works fine with this combined initrd, but there is no new microcode applied. [ 1.058641] microcode: CPU0 sig=0x20661, pf=0x2, revision=0x104 [ 1.063259] microcode: CPU1 sig=0x20661, pf=0x2, revision=0x104 [ 1.068011] microcode: Microcode Update Driver: v2.00 <tigran@...azian.fsnet.co.uk>, Peter Oruba It's only applied much later, when my microcode_ctl runs as a service. [ 15.764517] microcode: CPU0 sig=0x20661, pf=0x2, revision=0x104 [ 15.764979] microcode: CPU0 updated to revision 0x105, date = 2011-07-18 [ 15.765970] microcode: CPU1 sig=0x20661, pf=0x2, revision=0x104 [ 15.766430] microcode: CPU1 updated to revision 0x105, date = 2011-07-18 Where is the problem? Why is the microcode not being loaded early? Cheers Conrad -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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