[mirror_ubuntu-focal-kernel.git] / arch / x86 / kernel / cpu / scattered.c

/*
 *	Routines to identify additional cpu features that are scattered in
 *	cpuid space.
 */
#include <linux/cpu.h>

#include <asm/pat.h>
#include <asm/processor.h>

#include <asm/apic.h>

struct cpuid_bit {
	u16 feature;
	u8 reg;
	u8 bit;
	u32 level;
	u32 sub_leaf;
};

enum cpuid_regs {
	CR_EAX = 0,
	CR_ECX,
	CR_EDX,
	CR_EBX
};

void init_scattered_cpuid_features(struct cpuinfo_x86 *c)
{
	u32 max_level;
	u32 regs[4];
	const struct cpuid_bit *cb;

	static const struct cpuid_bit cpuid_bits[] = {
		{ X86_FEATURE_DTHERM,		CR_EAX, 0, 0x00000006, 0 },
		{ X86_FEATURE_IDA,		CR_EAX, 1, 0x00000006, 0 },
		{ X86_FEATURE_ARAT,		CR_EAX, 2, 0x00000006, 0 },
		{ X86_FEATURE_PLN,		CR_EAX, 4, 0x00000006, 0 },
		{ X86_FEATURE_PTS,		CR_EAX, 6, 0x00000006, 0 },
		{ X86_FEATURE_HWP,		CR_EAX, 7, 0x00000006, 0 },
		{ X86_FEATURE_HWP_NOITFY,	CR_EAX, 8, 0x00000006, 0 },
		{ X86_FEATURE_HWP_ACT_WINDOW,	CR_EAX, 9, 0x00000006, 0 },
		{ X86_FEATURE_HWP_EPP,		CR_EAX,10, 0x00000006, 0 },
		{ X86_FEATURE_HWP_PKG_REQ,	CR_EAX,11, 0x00000006, 0 },
		{ X86_FEATURE_APERFMPERF,	CR_ECX, 0, 0x00000006, 0 },
		{ X86_FEATURE_EPB,		CR_ECX, 3, 0x00000006, 0 },
		{ X86_FEATURE_HW_PSTATE,	CR_EDX, 7, 0x80000007, 0 },
		{ X86_FEATURE_CPB,		CR_EDX, 9, 0x80000007, 0 },
		{ X86_FEATURE_PROC_FEEDBACK,	CR_EDX,11, 0x80000007, 0 },
		{ X86_FEATURE_NPT,		CR_EDX, 0, 0x8000000a, 0 },
		{ X86_FEATURE_LBRV,		CR_EDX, 1, 0x8000000a, 0 },
		{ X86_FEATURE_SVML,		CR_EDX, 2, 0x8000000a, 0 },
		{ X86_FEATURE_NRIPS,		CR_EDX, 3, 0x8000000a, 0 },
		{ X86_FEATURE_TSCRATEMSR,	CR_EDX, 4, 0x8000000a, 0 },
		{ X86_FEATURE_VMCBCLEAN,	CR_EDX, 5, 0x8000000a, 0 },
		{ X86_FEATURE_FLUSHBYASID,	CR_EDX, 6, 0x8000000a, 0 },
		{ X86_FEATURE_DECODEASSISTS,	CR_EDX, 7, 0x8000000a, 0 },
		{ X86_FEATURE_PAUSEFILTER,	CR_EDX,10, 0x8000000a, 0 },
		{ X86_FEATURE_PFTHRESHOLD,	CR_EDX,12, 0x8000000a, 0 },
		{ 0, 0, 0, 0, 0 }
	};

	for (cb = cpuid_bits; cb->feature; cb++) {

		/* Verify that the level is valid */
		max_level = cpuid_eax(cb->level & 0xffff0000);
		if (max_level < cb->level ||
		    max_level > (cb->level | 0xffff))
			continue;

		cpuid_count(cb->level, cb->sub_leaf, &regs[CR_EAX],
			    &regs[CR_EBX], &regs[CR_ECX], &regs[CR_EDX]);

		if (regs[cb->reg] & (1 << cb->bit))
			set_cpu_cap(c, cb->feature);
	}
}
Commit	Line	Data
2decb194	1	/*
3f79410c	2	* Routines to identify additional cpu features that are scattered in
2decb194 PA	3	* cpuid space.
	4	*/
	5	#include <linux/cpu.h>
	6
	7	#include <asm/pat.h>
	8	#include <asm/processor.h>
	9
	10	#include <asm/apic.h>
	11
	12	struct cpuid_bit {
	13	u16 feature;
	14	u8 reg;
	15	u8 bit;
	16	u32 level;
	17	u32 sub_leaf;
	18	};
	19
	20	enum cpuid_regs {
	21	CR_EAX = 0,
	22	CR_ECX,
	23	CR_EDX,
	24	CR_EBX
	25	};
	26
148f9bb8	27	void init_scattered_cpuid_features(struct cpuinfo_x86 *c)
2decb194 PA	28	{
	29	u32 max_level;
	30	u32 regs[4];
	31	const struct cpuid_bit *cb;
	32
148f9bb8	33	static const struct cpuid_bit cpuid_bits[] = {
4ad33411	34	{ X86_FEATURE_DTHERM, CR_EAX, 0, 0x00000006, 0 },
2decb194 PA	35	{ X86_FEATURE_IDA, CR_EAX, 1, 0x00000006, 0 },
2decb194 PA	36	{ X86_FEATURE_ARAT, CR_EAX, 2, 0x00000006, 0 },
9792db61 FY	37	{ X86_FEATURE_PLN, CR_EAX, 4, 0x00000006, 0 },
9792db61 FY	38	{ X86_FEATURE_PTS, CR_EAX, 6, 0x00000006, 0 },
77873887 DB	39	{ X86_FEATURE_HWP, CR_EAX, 7, 0x00000006, 0 },
	40	{ X86_FEATURE_HWP_NOITFY, CR_EAX, 8, 0x00000006, 0 },
	41	{ X86_FEATURE_HWP_ACT_WINDOW, CR_EAX, 9, 0x00000006, 0 },
	42	{ X86_FEATURE_HWP_EPP, CR_EAX,10, 0x00000006, 0 },
	43	{ X86_FEATURE_HWP_PKG_REQ, CR_EAX,11, 0x00000006, 0 },
2decb194 PA	44	{ X86_FEATURE_APERFMPERF, CR_ECX, 0, 0x00000006, 0 },
2decb194 PA	45	{ X86_FEATURE_EPB, CR_ECX, 3, 0x00000006, 0 },
2f1e097e	46	{ X86_FEATURE_HW_PSTATE, CR_EDX, 7, 0x80000007, 0 },
9c5320c8 JS	47	{ X86_FEATURE_CPB, CR_EDX, 9, 0x80000007, 0 },
9c5320c8 JS	48	{ X86_FEATURE_PROC_FEEDBACK, CR_EDX,11, 0x80000007, 0 },
2decb194 PA	49	{ X86_FEATURE_NPT, CR_EDX, 0, 0x8000000a, 0 },
	50	{ X86_FEATURE_LBRV, CR_EDX, 1, 0x8000000a, 0 },
	51	{ X86_FEATURE_SVML, CR_EDX, 2, 0x8000000a, 0 },
	52	{ X86_FEATURE_NRIPS, CR_EDX, 3, 0x8000000a, 0 },
aeb9c7d6 AP	53	{ X86_FEATURE_TSCRATEMSR, CR_EDX, 4, 0x8000000a, 0 },
	54	{ X86_FEATURE_VMCBCLEAN, CR_EDX, 5, 0x8000000a, 0 },
	55	{ X86_FEATURE_FLUSHBYASID, CR_EDX, 6, 0x8000000a, 0 },
	56	{ X86_FEATURE_DECODEASSISTS, CR_EDX, 7, 0x8000000a, 0 },
	57	{ X86_FEATURE_PAUSEFILTER, CR_EDX,10, 0x8000000a, 0 },
	58	{ X86_FEATURE_PFTHRESHOLD, CR_EDX,12, 0x8000000a, 0 },
2decb194 PA	59	{ 0, 0, 0, 0, 0 }
	60	};
	61
	62	for (cb = cpuid_bits; cb->feature; cb++) {
	63
	64	/* Verify that the level is valid */
	65	max_level = cpuid_eax(cb->level & 0xffff0000);
	66	if (max_level < cb->level \|\|
	67	max_level > (cb->level \| 0xffff))
	68	continue;
	69
	70	cpuid_count(cb->level, cb->sub_leaf, &regs[CR_EAX],
	71	&regs[CR_EBX], &regs[CR_ECX], &regs[CR_EDX]);
	72
	73	if (regs[cb->reg] & (1 << cb->bit))
	74	set_cpu_cap(c, cb->feature);
	75	}
	76	}