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Misc updates: 

- Extend the x86 family/model macros with a steppings dimension,
    because x86 life isn't complex enough and Intel uses steppings to
    differentiate between different CPUs. :-/
 
  - Convert the TSC deadline timer quirks to the steppings macros.
 
  - Clean up asm mnemonics.
 
  - Fix the handling of an AMD erratum, or in other words, fix a kernel erratum.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-cpu-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 cpu updates from Ingo Molnar:
 "Misc updates:

   - Extend the x86 family/model macros with a steppings dimension,
     because x86 life isn't complex enough and Intel uses steppings to
     differentiate between different CPUs. :-/

   - Convert the TSC deadline timer quirks to the steppings macros.

   - Clean up asm mnemonics.

   - Fix the handling of an AMD erratum, or in other words, fix a kernel
     erratum"

* tag 'x86-cpu-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpu: Use RDRAND and RDSEED mnemonics in archrandom.h
  x86/cpu: Use INVPCID mnemonic in invpcid.h
  x86/cpu/amd: Make erratum #1054 a legacy erratum
  x86/apic: Convert the TSC deadline timer matching to steppings macro
  x86/cpu: Add a X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS() macro
  x86/cpu: Add a steppings field to struct x86_cpu_id
This commit is contained in:
Linus Torvalds 2020-06-01 13:57:51 -07:00
Родитель 17e0a7cb6a 3d81b3d1e5
Коммит eff5ddadab
7 изменённых файлов: 60 добавлений и 75 удалений
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26
arch/x86/include/asm/archrandom.h
Просмотреть файл

@ -15,16 +15,6 @@
#define RDRAND_RETRY_LOOPS 10
#define RDRAND_INT ".byte 0x0f,0xc7,0xf0"
#define RDSEED_INT ".byte 0x0f,0xc7,0xf8"
#ifdef CONFIG_X86_64
# define RDRAND_LONG ".byte 0x48,0x0f,0xc7,0xf0"
# define RDSEED_LONG ".byte 0x48,0x0f,0xc7,0xf8"
#else
# define RDRAND_LONG RDRAND_INT
# define RDSEED_LONG RDSEED_INT
#endif
/* Unconditional execution of RDRAND and RDSEED */
static inline bool __must_check rdrand_long(unsigned long *v)
@ -32,9 +22,9 @@ static inline bool __must_check rdrand_long(unsigned long *v)
bool ok;
unsigned int retry = RDRAND_RETRY_LOOPS;
do {
asm volatile(RDRAND_LONG
asm volatile("rdrand %[out]"
CC_SET(c)
: CC_OUT(c) (ok), "=a" (*v));
: CC_OUT(c) (ok), [out] "=r" (*v));
if (ok)
return true;
} while (--retry);
@ -46,9 +36,9 @@ static inline bool __must_check rdrand_int(unsigned int *v)
bool ok;
unsigned int retry = RDRAND_RETRY_LOOPS;
do {
asm volatile(RDRAND_INT
asm volatile("rdrand %[out]"
CC_SET(c)
: CC_OUT(c) (ok), "=a" (*v));
: CC_OUT(c) (ok), [out] "=r" (*v));
if (ok)
return true;
} while (--retry);
@ -58,18 +48,18 @@ static inline bool __must_check rdrand_int(unsigned int *v)
static inline bool __must_check rdseed_long(unsigned long *v)
{
bool ok;
asm volatile(RDSEED_LONG
asm volatile("rdseed %[out]"
CC_SET(c)
: CC_OUT(c) (ok), "=a" (*v));
: CC_OUT(c) (ok), [out] "=r" (*v));
return ok;
}
static inline bool __must_check rdseed_int(unsigned int *v)
{
bool ok;
asm volatile(RDSEED_INT
asm volatile("rdseed %[out]"
CC_SET(c)
: CC_OUT(c) (ok), "=a" (*v));
: CC_OUT(c) (ok), [out] "=r" (*v));
return ok;
}

31
arch/x86/include/asm/cpu_device_id.h
Просмотреть файл

@ -20,12 +20,14 @@
#define X86_CENTAUR_FAM6_C7_D 0xd
#define X86_CENTAUR_FAM6_NANO 0xf
#define X86_STEPPINGS(mins, maxs) GENMASK(maxs, mins)
/**
* X86_MATCH_VENDOR_FAM_MODEL_FEATURE - Base macro for CPU matching
* X86_MATCH_VENDOR_FAM_MODEL_STEPPINGS_FEATURE - Base macro for CPU matching
* @_vendor: The vendor name, e.g. INTEL, AMD, HYGON, ..., ANY
* The name is expanded to X86_VENDOR_@_vendor
* @_family: The family number or X86_FAMILY_ANY
* @_model: The model number, model constant or X86_MODEL_ANY
* @_steppings: Bitmask for steppings, stepping constant or X86_STEPPING_ANY
* @_feature: A X86_FEATURE bit or X86_FEATURE_ANY
* @_data: Driver specific data or NULL. The internal storage
* format is unsigned long. The supplied value, pointer
@ -37,15 +39,34 @@
* into another macro at the usage site for good reasons, then please
* start this local macro with X86_MATCH to allow easy grepping.
*/
#define X86_MATCH_VENDOR_FAM_MODEL_FEATURE(_vendor, _family, _model, \
_feature, _data) { \
#define X86_MATCH_VENDOR_FAM_MODEL_STEPPINGS_FEATURE(_vendor, _family, _model, \
_steppings, _feature, _data) { \
.vendor = X86_VENDOR_##_vendor, \
.family = _family, \
.model = _model, \
.steppings = _steppings, \
.feature = _feature, \
.driver_data = (unsigned long) _data \
}
/**
* X86_MATCH_VENDOR_FAM_MODEL_FEATURE - Macro for CPU matching
* @_vendor: The vendor name, e.g. INTEL, AMD, HYGON, ..., ANY
* The name is expanded to X86_VENDOR_@_vendor
* @_family: The family number or X86_FAMILY_ANY
* @_model: The model number, model constant or X86_MODEL_ANY
* @_feature: A X86_FEATURE bit or X86_FEATURE_ANY
* @_data: Driver specific data or NULL. The internal storage
* format is unsigned long. The supplied value, pointer
* etc. is casted to unsigned long internally.
*
* The steppings arguments of X86_MATCH_VENDOR_FAM_MODEL_STEPPINGS_FEATURE() is
* set to wildcards.
*/
#define X86_MATCH_VENDOR_FAM_MODEL_FEATURE(vendor, family, model, feature, data) \
X86_MATCH_VENDOR_FAM_MODEL_STEPPINGS_FEATURE(vendor, family, model, \
X86_STEPPING_ANY, feature, data)
/**
* X86_MATCH_VENDOR_FAM_FEATURE - Macro for matching vendor, family and CPU feature
* @vendor: The vendor name, e.g. INTEL, AMD, HYGON, ..., ANY
@ -139,6 +160,10 @@
#define X86_MATCH_INTEL_FAM6_MODEL(model, data) \
X86_MATCH_VENDOR_FAM_MODEL(INTEL, 6, INTEL_FAM6_##model, data)
#define X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(model, steppings, data) \
X86_MATCH_VENDOR_FAM_MODEL_STEPPINGS_FEATURE(INTEL, 6, INTEL_FAM6_##model, \
steppings, X86_FEATURE_ANY, data)
/*
* Match specific microcode revisions.
*

7
arch/x86/include/asm/invpcid.h
Просмотреть файл

@ -12,12 +12,9 @@ static inline void __invpcid(unsigned long pcid, unsigned long addr,
* stale TLB entries and, especially if we're flushing global
* mappings, we don't want the compiler to reorder any subsequent
* memory accesses before the TLB flush.
*
* The hex opcode is invpcid (%ecx), %eax in 32-bit mode and
* invpcid (%rcx), %rax in long mode.
*/
asm volatile (".byte 0x66, 0x0f, 0x38, 0x82, 0x01"
: : "m" (desc), "a" (type), "c" (&desc) : "memory");
asm volatile("invpcid %[desc], %[type]"
:: [desc] "m" (desc), [type] "r" (type) : "memory");
}
#define INVPCID_TYPE_INDIV_ADDR 0

59
arch/x86/kernel/apic/apic.c
Просмотреть файл

@ -544,46 +544,20 @@ static struct clock_event_device lapic_clockevent = {
};
static DEFINE_PER_CPU(struct clock_event_device, lapic_events);
static __init u32 hsx_deadline_rev(void)
{
switch (boot_cpu_data.x86_stepping) {
case 0x02: return 0x3a; /* EP */
case 0x04: return 0x0f; /* EX */
}
return ~0U;
}
static __init u32 bdx_deadline_rev(void)
{
switch (boot_cpu_data.x86_stepping) {
case 0x02: return 0x00000011;
case 0x03: return 0x0700000e;
case 0x04: return 0x0f00000c;
case 0x05: return 0x0e000003;
}
return ~0U;
}
static __init u32 skx_deadline_rev(void)
{
switch (boot_cpu_data.x86_stepping) {
case 0x03: return 0x01000136;
case 0x04: return 0x02000014;
}
if (boot_cpu_data.x86_stepping > 4)
return 0;
return ~0U;
}
static const struct x86_cpu_id deadline_match[] __initconst = {
X86_MATCH_INTEL_FAM6_MODEL( HASWELL_X, &hsx_deadline_rev),
X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(HASWELL_X, X86_STEPPINGS(0x2, 0x2), 0x3a), /* EP */
X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(HASWELL_X, X86_STEPPINGS(0x4, 0x4), 0x0f), /* EX */
X86_MATCH_INTEL_FAM6_MODEL( BROADWELL_X, 0x0b000020),
X86_MATCH_INTEL_FAM6_MODEL( BROADWELL_D, &bdx_deadline_rev),
X86_MATCH_INTEL_FAM6_MODEL( SKYLAKE_X, &skx_deadline_rev),
X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(BROADWELL_D, X86_STEPPINGS(0x2, 0x2), 0x00000011),
X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(BROADWELL_D, X86_STEPPINGS(0x3, 0x3), 0x0700000e),
X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(BROADWELL_D, X86_STEPPINGS(0x4, 0x4), 0x0f00000c),
X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(BROADWELL_D, X86_STEPPINGS(0x5, 0x5), 0x0e000003),
X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(SKYLAKE_X, X86_STEPPINGS(0x3, 0x3), 0x01000136),
X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(SKYLAKE_X, X86_STEPPINGS(0x4, 0x4), 0x02000014),
X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(SKYLAKE_X, X86_STEPPINGS(0x5, 0xf), 0),
X86_MATCH_INTEL_FAM6_MODEL( HASWELL, 0x22),
X86_MATCH_INTEL_FAM6_MODEL( HASWELL_L, 0x20),
@ -615,14 +589,7 @@ static __init bool apic_validate_deadline_timer(void)
if (!m)
return true;
/*
* Function pointers will have the MSB set due to address layout,
* immediate revisions will not.
*/
if ((long)m->driver_data < 0)
rev = ((u32 (*)(void))(m->driver_data))();
else
rev = (u32)m->driver_data;
rev = (u32)m->driver_data;
if (boot_cpu_data.microcode >= rev)
return true;

3
arch/x86/kernel/cpu/amd.c
Просмотреть файл

@ -1145,8 +1145,7 @@ static const int amd_erratum_383[] =
/* #1054: Instructions Retired Performance Counter May Be Inaccurate */
static const int amd_erratum_1054[] =
AMD_OSVW_ERRATUM(0, AMD_MODEL_RANGE(0x17, 0, 0, 0x2f, 0xf));
AMD_LEGACY_ERRATUM(AMD_MODEL_RANGE(0x17, 0, 0, 0x2f, 0xf));
static bool cpu_has_amd_erratum(struct cpuinfo_x86 *cpu, const int *erratum)
{

7
arch/x86/kernel/cpu/match.c
Просмотреть файл

@ -39,13 +39,18 @@ const struct x86_cpu_id *x86_match_cpu(const struct x86_cpu_id *match)
const struct x86_cpu_id *m;
struct cpuinfo_x86 *c = &boot_cpu_data;
for (m = match; m->vendor | m->family | m->model | m->feature; m++) {
for (m = match;
m->vendor | m->family | m->model | m->steppings | m->feature;
m++) {
if (m->vendor != X86_VENDOR_ANY && c->x86_vendor != m->vendor)
continue;
if (m->family != X86_FAMILY_ANY && c->x86 != m->family)
continue;
if (m->model != X86_MODEL_ANY && c->x86_model != m->model)
continue;
if (m->steppings != X86_STEPPING_ANY &&
!(BIT(c->x86_stepping) & m->steppings))
continue;
if (m->feature != X86_FEATURE_ANY && !cpu_has(c, m->feature))
continue;
return m;

2
include/linux/mod_devicetable.h
Просмотреть файл

@ -663,6 +663,7 @@ struct x86_cpu_id {
__u16 vendor;
__u16 family;
__u16 model;
__u16 steppings;
__u16 feature; /* bit index */
kernel_ulong_t driver_data;
};
@ -671,6 +672,7 @@ struct x86_cpu_id {
#define X86_VENDOR_ANY 0xffff
#define X86_FAMILY_ANY 0
#define X86_MODEL_ANY 0
#define X86_STEPPING_ANY 0
#define X86_FEATURE_ANY 0 /* Same as FPU, you can't test for that */
/*