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Commit b74b06c5 authored by H. Peter Anvin's avatar H. Peter Anvin
Browse files

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: default avatarH. Peter Anvin <hpa@zytor.com>
parent e6a5652f

arch/x86/boot/cpucheck.c

+4 −4
Original line number Diff line number Diff line
@@ -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))