[PATCH v14 01/24] x86/cpufeatures: Add missing CQM feature dependency

[Tony Luck]

The L3 monitoring features are enumerated from CPUID leaf 0xF. Both the Intel
Software Developer's Manual, and the AMD64 Architecture Programmer's Manual,
say that software must check that CPUID(0x7,0x0).EBX[12] (X86_FEATURE_CQM)
is set before checking for monitoring features in CPUID leaf 0xF.

The CPU feature dependency table does not record this requirement.

Add the missing dependency of X86_FEATURE_CQM_LLC on X86_FEATURE_CQM.

Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
---
v14:
	Add AMD64 manual
	s/Linux X86_FEATURE_CQM/X86_FEATURE_CQM/
	Complete the trio of context, problem, solution paragraphs
	by adding the problem statement.
---
 arch/x86/kernel/cpu/cpuid-deps.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/cpuid-deps.c b/arch/x86/kernel/cpu/cpuid-deps.c
index 99801e844b30..93d45b688f6c 100644
--- a/arch/x86/kernel/cpu/cpuid-deps.c
+++ b/arch/x86/kernel/cpu/cpuid-deps.c
@@ -67,6 +67,7 @@ static const struct cpuid_dep cpuid_deps[] = {
 	{ X86_FEATURE_AVX512_4FMAPS,		X86_FEATURE_AVX512F   },
 	{ X86_FEATURE_AVX512_VPOPCNTDQ,		X86_FEATURE_AVX512F   },
 	{ X86_FEATURE_AVX512_VP2INTERSECT,	X86_FEATURE_AVX512VL  },
+	{ X86_FEATURE_CQM_LLC,			X86_FEATURE_CQM       },
 	{ X86_FEATURE_CQM_OCCUP_LLC,		X86_FEATURE_CQM_LLC   },
 	{ X86_FEATURE_CQM_MBM_TOTAL,		X86_FEATURE_CQM_LLC   },
 	{ X86_FEATURE_CQM_MBM_LOCAL,		X86_FEATURE_CQM_LLC   },
-- 
2.56.0