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Date: Mon, 6 Apr 2020 15:20:30 +0200 From: Ard Biesheuvel <ardb@...nel.org> To: Sergey Shatunov <me@...k.pw> Cc: Arvind Sankar <nivedita@...m.mit.edu>, Borislav Petkov <bp@...en8.de>, hpa@...or.com, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, mingo@...hat.com, Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org, linux-efi <linux-efi@...r.kernel.org> Subject: Re: [PATCH 1/2] x86/boot/compressed/64: Remove .bss/.pgtable from bzImage On Mon, 6 Apr 2020 at 15:14, Sergey Shatunov <me@...k.pw> wrote: > > On Mon, 2020-04-06 at 10:44 +0200, Ard Biesheuvel wrote: > > On Mon, 6 Apr 2020 at 01:18, Arvind Sankar <nivedita@...m.mit.edu> > > wrote: > > > On Sun, Apr 05, 2020 at 10:42:46PM +0700, Sergey Shatunov wrote: > > > > This patch causes some strange things happens with my laptop. > > > > > > > > Cold boot crashed in some early initilization logic with message > > > > 'Failed to execute /esp/.../linux.efi: Buffer Too Small'. > > > > After couple reboots into firmware setup (bios) or hot reboot > > > > from other working kernel (without that commit) helps it to boot. > > > > During bisecting couple times I saw different message: > > > > 'exit_efi() failed; efi_main() failed', but above tricks helps it > > > > too. > > > > Could you please try adding 'efi=no_disable_early_pci_dma' to the > > kernel command line? The lack of BSS zeroization may result in that > > option to get inadvertently enabled, and it is known to break > > exit_boot() on some systems. > > With 'efi=no_disable_early_pci_dma' it works again. > Thanks Sergey
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