Commit-ID: 426d1aff3138cf38da14e912df3c75e312f96e9e Gitweb: http://git.kernel.org/tip/426d1aff3138cf38da14e912df3c75e312f96e9e Author: Andy Lutomirski <l...@kernel.org> AuthorDate: Fri, 9 Dec 2016 10:24:06 -0800 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Mon, 19 Dec 2016 11:54:20 +0100
Revert "x86/boot: Fail the boot if !M486 and CPUID is missing" This reverts commit ed68d7e9b9cfb64f3045ffbcb108df03c09a0f98. The patch wasn't quite correct -- there are non-Intel (and hence non-486) CPUs that we support that don't have CPUID. Since we no longer require CPUID for sync_core(), just revert the patch. I think the relevant CPUs are Geode and Elan, but I'm not sure. In principle, we should try to do better at identifying CPUID-less CPUs in early boot, but that's more complicated. Reported-by: One Thousand Gnomes <gno...@lxorguk.ukuu.org.uk> Signed-off-by: Andy Lutomirski <l...@kernel.org> Cc: Juergen Gross <jgr...@suse.com> Cc: Denys Vlasenko <dvlas...@redhat.com> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Brian Gerst <brge...@gmail.com> Cc: Josh Poimboeuf <jpoim...@redhat.com> Cc: Matthew Whitehead <tedheads...@gmail.com> Cc: Borislav Petkov <b...@alien8.de> Cc: Henrique de Moraes Holschuh <h...@hmh.eng.br> Cc: Andrew Cooper <andrew.coop...@citrix.com> Cc: Boris Ostrovsky <boris.ostrov...@oracle.com> Cc: xen-devel <Xen-devel@lists.xen.org> Cc: Linus Torvalds <torva...@linux-foundation.org> Link: http://lkml.kernel.org/r/82acde18a108b8e353180dd6febcc2876df33f24.1481307769.git.l...@kernel.org Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- arch/x86/boot/cpu.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/arch/x86/boot/cpu.c b/arch/x86/boot/cpu.c index 4224ede..26240dd 100644 --- a/arch/x86/boot/cpu.c +++ b/arch/x86/boot/cpu.c @@ -87,12 +87,6 @@ int validate_cpu(void) return -1; } - if (CONFIG_X86_MINIMUM_CPU_FAMILY <= 4 && !IS_ENABLED(CONFIG_M486) && - !has_eflag(X86_EFLAGS_ID)) { - printf("This kernel requires a CPU with the CPUID instruction. Build with CONFIG_M486=y to run on this CPU.\n"); - return -1; - } - if (err_flags) { puts("This kernel requires the following features " "not present on the CPU:\n"); _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
