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* Boot regression with bacf6b499e11 ("x86/mm: Use a struct to reduce parameters for SME PGD mapping") on top of -rc8
@ 2018-01-20  1:23 Laura Abbott
  2018-01-20  2:23 ` Gabriel C
                   ` (2 more replies)
  0 siblings, 3 replies; 24+ messages in thread
From: Laura Abbott @ 2018-01-20  1:23 UTC (permalink / raw)
  To: Tom Lendacky, Borislav Petkov, Linus Torvalds, Peter Zijlstra,
	Thomas Gleixner, Ingo Molnar
  Cc: Brijesh Singh, X86 ML, Linux Kernel Mailing List

Hi,

Fedora got multiple reports of an early bootup crash post -rc8.
Bisection showed bacf6b499e11 ("x86/mm: Use a struct to reduce
parameters for SME PGD mapping") . It doesn't revert cleanly
but if I revert the few other changes in arch/x86/mm/mem_encrypt.c
as well it boots up fine.

Annoyingly, I can't seem to get any actual kernel logs even with
earlyprintk. It just reboots immediately (triple fault?). This
happens on both of my Lenovo machines and I can ask other reporters
for details as well.

$ git bisect log
# bad: [ec835f8104a21f4d4eeb9d316ee71d2b4a7f00de] Merge tag 'trace-v4.15-rc4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
# good: [a8750ddca918032d6349adbf9a4b6555e7db20da] Linux 4.15-rc8
git bisect start 'origin/master' 'v4.15-rc8'
# bad: [79683f80e4f07dba13cc08d0ebcf5c7b0aa1bf68] Merge tag 'mmc-v4.15-rc2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
git bisect bad 79683f80e4f07dba13cc08d0ebcf5c7b0aa1bf68
# good: [161f72ed6dbe7fb176585091d3b797125d310399] Merge tag 'mac80211-for-davem-2018-01-15' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
git bisect good 161f72ed6dbe7fb176585091d3b797125d310399
# good: [88dc7fca18001fd883e5ace775afa316b68c8f2c] Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 88dc7fca18001fd883e5ace775afa316b68c8f2c
# bad: [d47924417319e3b6a728c0b690f183e75bc2a702] x86/intel_rdt/cqm: Prevent use after free
git bisect bad d47924417319e3b6a728c0b690f183e75bc2a702
# good: [fc90ccfd286eabb05ec54521367df8663cf0bbbf] Revert "x86/apic: Remove init_bsp_APIC()"
git bisect good fc90ccfd286eabb05ec54521367df8663cf0bbbf
# bad: [bacf6b499e11760aef73a3bb5ce4e5eea74a3fd4] x86/mm: Use a struct to reduce parameters for SME PGD mapping
git bisect bad bacf6b499e11760aef73a3bb5ce4e5eea74a3fd4
# good: [1303880179e67c59e801429b7e5d0f6b21137d99] x86/mm: Clean up register saving in the __enc_copy() assembly code
git bisect good 1303880179e67c59e801429b7e5d0f6b21137d99
# first bad commit: [bacf6b499e11760aef73a3bb5ce4e5eea74a3fd4] x86/mm: Use a struct to reduce parameters for SME PGD mapping


Configuration is at https://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/fedora.git/commit/?h=rawhide
Note that I do think this is something in the Fedora configuration
because a generic "make defconfig" booted just fine.

Thanks,
Laura

^ permalink raw reply	[flat|nested] 24+ messages in thread

end of thread, other threads:[~2018-01-21 10:36 UTC | newest]

Thread overview: 24+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2018-01-20  1:23 Boot regression with bacf6b499e11 ("x86/mm: Use a struct to reduce parameters for SME PGD mapping") on top of -rc8 Laura Abbott
2018-01-20  2:23 ` Gabriel C
2018-01-20  4:02   ` Laura Abbott
2018-01-20  5:25     ` Gabriel C
2018-01-20  6:15       ` Tom Lendacky
2018-01-20  6:57         ` Laura Abbott
2018-01-20  7:03           ` Laura Abbott
2018-01-20 12:08             ` Gabriel C
2018-01-20 12:33           ` Ingo Molnar
2018-01-20 13:13             ` Ingo Molnar
     [not found]               ` <d2b236d9-ccfc-0cd0-f097-9daba70b86ff@redhat.com>
2018-01-20 17:34                 ` Tom Lendacky
2018-01-21  1:14                   ` [PATCH] x86: Use __nostackprotect for sme_encrypt_kernel Laura Abbott
2018-01-21  1:23                     ` Linus Torvalds
2018-01-21  1:49                       ` Gabriel C
2018-01-21  4:16                         ` Linus Torvalds
2018-01-21  9:37                           ` Greg Kroah-Hartman
2018-01-21  9:50                             ` Ingo Molnar
2018-01-21 10:36                               ` Greg Kroah-Hartman
2018-01-21  8:46                       ` Ingo Molnar
2018-01-20 12:01         ` Boot regression with bacf6b499e11 ("x86/mm: Use a struct to reduce parameters for SME PGD mapping") on top of -rc8 Gabriel C
2018-01-20  2:38 ` Linus Torvalds
2018-01-20  4:13   ` Tom Lendacky
2018-01-20 12:12 ` Ingo Molnar
2018-01-20 15:35   ` Laura Abbott

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