From: H. Peter Anvin Date: Fri, 15 Aug 2008 22:36:31 +0000 (-0700) Subject: x86: boot: stub out unimplemented CPU feature words X-Git-Tag: v2.6.27-rc6~23^2~7 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b74b06c5f6612a72298f37baa65460a59c26ca67;p=linux-2.6 x86: boot: stub out unimplemented CPU feature words The CPU feature detection code in the boot code is somewhat minimal, and doesn't include all possible CPUID words. In particular, it doesn't contain the code for CPU feature words 2 (Transmeta), 3 (Linux-specific), 5 (VIA), or 7 (scattered). Zero them out, so we can still set those bits as known at compile time; in particular, this allows creating a Linux-specific NOPL flag and have it required (and therefore resolvable at compile time) in 64-bit mode. Signed-off-by: H. Peter Anvin --- diff --git a/arch/x86/boot/cpucheck.c b/arch/x86/boot/cpucheck.c index 4b9ae7c567..4d3ff03720 100644 --- a/arch/x86/boot/cpucheck.c +++ b/arch/x86/boot/cpucheck.c @@ -38,12 +38,12 @@ static const u32 req_flags[NCAPINTS] = { REQUIRED_MASK0, REQUIRED_MASK1, - REQUIRED_MASK2, - REQUIRED_MASK3, + 0, /* REQUIRED_MASK2 not implemented in this file */ + 0, /* REQUIRED_MASK3 not implemented in this file */ REQUIRED_MASK4, - REQUIRED_MASK5, + 0, /* REQUIRED_MASK5 not implemented in this file */ REQUIRED_MASK6, - REQUIRED_MASK7, + 0, /* REQUIRED_MASK7 not implemented in this file */ }; #define A32(a, b, c, d) (((d) << 24)+((c) << 16)+((b) << 8)+(a))