linux-kernel - Re: [PATCH] [8/45] x86_64: Use string instruction memcpy on AMD Fam11h

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Pine.LNX.4.64.0709221129230.15712@fbirervta.pbzchgretzou.qr>
Date:	Sat, 22 Sep 2007 11:29:55 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Andi Kleen <ak@...e.de>
cc:	patches@...-64.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [8/45] x86_64: Use string instruction memcpy on AMD
 Fam11h


On Sep 21 2007 22:44, Andi Kleen wrote:
>Subject: [PATCH] [8/45] x86_64: Use string instruction memcpy on AMD Fam11h
>
>--- linux.orig/arch/x86_64/kernel/setup.c
>+++ linux/arch/x86_64/kernel/setup.c
>@@ -575,7 +575,7 @@ static void __cpuinit init_amd(struct cp
> 	level = cpuid_eax(1);
> 	if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
> 		set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
>-	if (c->x86 == 0x10)
>+	if (c->x86 == 0x10 || c->x86 == 0x11)
> 		set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);

Perhaps it can be assumed that all future CPU versions have this and
	if (c->x86 >= 0x10)
could be used?

-
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/