> -----Original Message----- > From: Ard Biesheuvel <ardb@xxxxxxxxxx> > Sent: Tuesday, February 7, 2023 5:04 PM > To: Justin He <Justin.He@xxxxxxx> > Cc: Huacai Chen <chenhuacai@xxxxxxxxxx>; linux-efi@xxxxxxxxxxxxxxx; > linux-kernel@xxxxxxxxxxxxxxx; Alexandru Elisei <Alexandru.Elisei@xxxxxxx>; > Jason A. Donenfeld <Jason@xxxxxxxxx>; nd <nd@xxxxxxx> > Subject: Re: [PATCH 0/2] Fix boot hang issue on Ampere Emag server > > On Tue, 7 Feb 2023 at 10:03, Justin He <Justin.He@xxxxxxx> wrote: > > > > Hi Ard > > > > > -----Original Message----- > > > From: Ard Biesheuvel <ardb@xxxxxxxxxx> > > > Sent: Tuesday, February 7, 2023 4:54 PM > > > To: Justin He <Justin.He@xxxxxxx> > > > Cc: Huacai Chen <chenhuacai@xxxxxxxxxx>; linux-efi@xxxxxxxxxxxxxxx; > > > linux-kernel@xxxxxxxxxxxxxxx; Alexandru Elisei > > > <Alexandru.Elisei@xxxxxxx>; Jason A. Donenfeld <Jason@xxxxxxxxx>; nd > > > <nd@xxxxxxx> > > > Subject: Re: [PATCH 0/2] Fix boot hang issue on Ampere Emag server > > > > > > On Tue, 7 Feb 2023 at 09:49, Justin He <Justin.He@xxxxxxx> wrote: > > > > > > > > > > > > > > > > > -----Original Message----- > > > > [..] > > > > > > The root cause of the hung IMO might be similar to commit > > > > > > 550b33cfd445296868a478e8413ffb2e963eed32 > > > > > > Author: Ard Biesheuvel <ardb@xxxxxxxxxx> > > > > > > Date: Thu Nov 10 10:36:20 2022 +0100 > > > > > > > > > > > > arm64: efi: Force the use of SetVirtualAddressMap() on > > > > > > Altra machines > > > > > > > > > > > > Do you agree with the idea if I add Ampere ”eMAG” machine into > > > > > > the list of Using SetVirtualAddressMap() forcibly? > > > > > > > > > > > > Please note that even in previous kernel patch, the efibootmgr > > > > > > -t > > > > > > 10 will make kernel hung if I passed "efi=novamap" to the boot > > > parameter. > > > > > > > > > > > > > > > > Interesting. What does dmidecode return for the family in the > > > > > type 1 > > > record? > > > > > > > > # dmidecode |grep -i family > > > > Family: eMAG > > > > Family: ARMv8 > > > > > > > > The full dmidecode log is at https://pastebin.com/M3MAJtUG > > > > > > > > > > OK please try this: > > > > > > diff --git a/drivers/firmware/efi/libstub/arm64.c > > > b/drivers/firmware/efi/libstub/arm64.c > > > index ff2d18c42ee74979..fae930dec82be7c6 100644 > > > --- a/drivers/firmware/efi/libstub/arm64.c > > > +++ b/drivers/firmware/efi/libstub/arm64.c > > > @@ -22,7 +22,8 @@ static bool system_needs_vamap(void) > > > * Ampere Altra machines crash in SetTime() if > > > SetVirtualAddressMap() > > > * has not been called prior. > > > */ > > > - if (!type1_family || strcmp(type1_family, "Altra")) > > > + if (!type1_family || > > > + (strcmp(type1_family, "Altra") && strcmp(type1_family, > > > + "eMAG"))) > > > return false; > > > > > > efi_warn("Working around broken SetVirtualAddressMap()\n"); > > > > Yes, it works on my eMAG server: the kernel boots. > > Other than efibootmgr failure. But I noticed this efibootmgr failure > > even before Commit d3549a938b7 ("avoid SetVirtualAddressMap() when > > possible ") > > > > root@:~/linux# efibootmgr -t 9; efibootmgr -t 5; Could not set > > Timeout: Input/output error Could not set Timeout: Input/output error > > > > Do you get any [Firmware Bug] lines in the kernel log? No, I built the kernel based on: commit d2d11f342b179f1894a901f143ec7c008caba43e (HEAD -> master, origin/master, origin/HEAD) Author: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Date: Sun Feb 5 17:17:10 2023 -0800 Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Are you worried about your sync exception fixup patch? I think it has been included. -- Cheers, Justin (Jia He)
