| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Tue, 16 Jun 2015 14:33:10 -0700 From: "H. Peter Anvin" <hpa@...or.com> To: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, Ingo Molnar <mingo@...nel.org> CC: mingo@...hat.com, tglx@...utronix.de, pavel@....cz, rjw@...ysocki.net, x86@...nel.org, linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, Denys Vlasenko <dvlasenk@...hat.com>, Andy Lutomirski <luto@...capital.net>, Borislav Petkov <bp@...en8.de>, Brian Gerst <brgerst@...il.com>, Linus Torvalds <torvalds@...ux-foundation.org>, "Kleen, Andi" <andi.kleen@...el.com> Subject: Re: [PATCH, DEBUG] x86/32: Add small delay after resume On 06/15/2015 09:10 AM, Srinivas Pandruvada wrote: >> >> So is it true that we always execute wakeup_pmode_return first after we return >> from the BIOS? >> >> If so then the BIOS touching DS cannot be an issue, as we re-initialize all >> segment selectors, which reloads the descriptors: >> >> ENTRY(wakeup_pmode_return) >> wakeup_pmode_return: >> movw $__KERNEL_DS, %ax >> movw %ax, %ss >> movw %ax, %ds >> movw %ax, %es >> movw %ax, %fs >> movw %ax, %gs >> >> # reload the gdt, as we need the full 32 bit address >> lidt saved_idt >> lldt saved_ldt >> ljmp $(__KERNEL_CS), $1f >> Where does the GDT get initialized? -hpa -- 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/
Powered by blists - more mailing lists