disable cpu isolcpus

hc

2023-12-09 958e46acc8e900e8569dd467c1af9b8d2d019394

 kernel/arch/x86/kernel/cpu/scattered.c
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@@ -4,10 +4,11 @@
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  */
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 #include <linux/cpu.h>
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-#include <asm/pat.h>
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+#include <asm/memtype.h>
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+#include <asm/apic.h>
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 #include <asm/processor.h>
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-#include <asm/apic.h>
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+#include "cpu.h"
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 struct cpuid_bit {
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 	u16 feature;
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@@ -17,10 +18,15 @@
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 	u32 sub_leaf;
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 };
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-/* Please keep the leaf sorted by cpuid_bit.level for faster search. */
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+/*
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+ * Please keep the leaf sorted by cpuid_bit.level for faster search.
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+ * X86_FEATURE_MBA is supported by both Intel and AMD. But the CPUID
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+ * levels are different and there is a separate entry for each.
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+ */
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 static const struct cpuid_bit cpuid_bits[] = {
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 	{ X86_FEATURE_APERFMPERF,       CPUID_ECX,  0, 0x00000006, 0 },
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 	{ X86_FEATURE_EPB,		CPUID_ECX,  3, 0x00000006, 0 },
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+	{ X86_FEATURE_RRSBA_CTRL,	CPUID_EDX,  2, 0x00000007, 2 },
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 	{ X86_FEATURE_CQM_LLC,		CPUID_EDX,  1, 0x0000000f, 0 },
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 	{ X86_FEATURE_CQM_OCCUP_LLC,	CPUID_EDX,  0, 0x0000000f, 1 },
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 	{ X86_FEATURE_CQM_MBM_TOTAL,	CPUID_EDX,  1, 0x0000000f, 1 },
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@@ -30,11 +36,15 @@
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 	{ X86_FEATURE_CDP_L3,		CPUID_ECX,  2, 0x00000010, 1 },
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 	{ X86_FEATURE_CDP_L2,		CPUID_ECX,  2, 0x00000010, 2 },
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 	{ X86_FEATURE_MBA,		CPUID_EBX,  3, 0x00000010, 0 },
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+	{ X86_FEATURE_PER_THREAD_MBA,	CPUID_ECX,  0, 0x00000010, 3 },
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 	{ X86_FEATURE_HW_PSTATE,	CPUID_EDX,  7, 0x80000007, 0 },
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 	{ X86_FEATURE_CPB,		CPUID_EDX,  9, 0x80000007, 0 },
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 	{ X86_FEATURE_PROC_FEEDBACK,    CPUID_EDX, 11, 0x80000007, 0 },
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+	{ X86_FEATURE_MBA,		CPUID_EBX,  6, 0x80000008, 0 },
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 	{ X86_FEATURE_SME,		CPUID_EAX,  0, 0x8000001f, 0 },
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 	{ X86_FEATURE_SEV,		CPUID_EAX,  1, 0x8000001f, 0 },
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+	{ X86_FEATURE_SEV_ES,		CPUID_EAX,  3, 0x8000001f, 0 },
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+	{ X86_FEATURE_SME_COHERENT,	CPUID_EAX, 10, 0x8000001f, 0 },
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 	{ 0, 0, 0, 0, 0 }
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 };
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@@ -60,27 +70,3 @@
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 			set_cpu_cap(c, cb->feature);
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 	}
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 }
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-
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-u32 get_scattered_cpuid_leaf(unsigned int level, unsigned int sub_leaf,
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-			     enum cpuid_regs_idx reg)
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-{
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-	const struct cpuid_bit *cb;
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-	u32 cpuid_val = 0;
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-
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-	for (cb = cpuid_bits; cb->feature; cb++) {
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-
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-		if (level > cb->level)
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-			continue;
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-
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-		if (level < cb->level)
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-			break;
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-
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-		if (reg == cb->reg && sub_leaf == cb->sub_leaf) {
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-			if (cpu_has(&boot_cpu_data, cb->feature))
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-				cpuid_val |= BIT(cb->bit);
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-		}
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-	}
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-
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-	return cpuid_val;
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-}
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-EXPORT_SYMBOL_GPL(get_scattered_cpuid_leaf);