renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-11-24 02:24:28 +08:00
Code

Fix an idle CPU selection bug, and an AMD Ryzen maximum frequency enumeration bug.

Browse Source 
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmCffOARHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1iHBRAAm7p68+/sec2neJ2SxrOdl3kWU5yUXgM/
 X2WUQiU8ERAI1IfaKcJBbJCDlIr7Pufwec31IvLpyM5my+pfNkuB9EcLxwQuUZ8y
 2IZXF3HlaxWUEfwVqAQ/Dm1J1jExz20vSVzom/2TeE8H1kibdjs6EfouW17FZbwc
 CXtZC5MWArU/Wt5cjm84Cn5JAx0Udw3RKv8O5o3w/gz0RMjTGCzxlS54QwF+j1fG
 r1kRL+64yS1LPofnsEDSqfw52J/agSpVOgOiRtn7RUYPoTlmkYZ7l1JeZe/bukDi
 YsF6uE8nfoRrjhdWVwOpvjEeTzP1hnNBT64piOY+G0wdoBJHmU+jzu5mJIyjxAeY
 BnJqA7cH16F9cIKCPilmsifbptJtli+Y301036sxMBj8IlcbPKdHlW/qG9ibUCeN
 r6IPZnONd5JaDeEUCQl91fhGxDn8JrSew5Bh6Yp8B2KsJ9cXirUoPORjqu7Fccfe
 YRHNPfK8JpSPGv5SSXRrrr6bSdPBhEueqUemfItTGsPpZY/mD0iTIlecol6o0Wfc
 A11rk6Hb1BMVveNSCTrH7VFJ9nsql1XI5C7rp0D4+9uEDEYRHsq9rInZSevbytsI
 ocF03ineypbGmiiLT5cYiwR2+ucheX8WaS+BpGXlxjTwvAV+s0QdeTe9UyW9mySl
 R1ly0Jwpd3Q=
 =Ggm4
 -----END PGP SIGNATURE-----

Merge tag 'sched-urgent-2021-05-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler fixes from Ingo Molnar:
 "Fix an idle CPU selection bug, and an AMD Ryzen maximum frequency
  enumeration bug"

* tag 'sched-urgent-2021-05-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, sched: Fix the AMD CPPC maximum performance value on certain AMD Ryzen generations
  sched/fair: Fix clearing of has_idle_cores flag in select_idle_cpu()
This commit is contained in:
Linus Torvalds 2021-05-15 10:24:48 -07:00
commit c12a29ed90
5 changed files with 25 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/include/asm/processor.h
View File

@ -787,8 +787,10 @@ DECLARE_PER_CPU(u64, msr_misc_features_shadow);
#ifdef CONFIG_CPU_SUP_AMD
extern u32 amd_get_nodes_per_socket(void);
extern u32 amd_get_highest_perf(void);
#else
static inline u32 amd_get_nodes_per_socket(void) { return 0; }
static inline u32 amd_get_highest_perf(void) { return 0; }
#endif
static inline uint32_t hypervisor_cpuid_base(const char *sig, uint32_t leaves)

16
arch/x86/kernel/cpu/amd.c
View File

@ -1165,3 +1165,19 @@ void set_dr_addr_mask(unsigned long mask, int dr)
break;
}
}
u32 amd_get_highest_perf(void)
{
struct cpuinfo_x86 *c = &boot_cpu_data;
if (c->x86 == 0x17 && ((c->x86_model >= 0x30 && c->x86_model < 0x40) ||
(c->x86_model >= 0x70 && c->x86_model < 0x80)))
return 166;
if (c->x86 == 0x19 && ((c->x86_model >= 0x20 && c->x86_model < 0x30) ||
(c->x86_model >= 0x40 && c->x86_model < 0x70)))
return 166;
return 255;
}
EXPORT_SYMBOL_GPL(amd_get_highest_perf);

2
arch/x86/kernel/smpboot.c
View File

@ -2043,7 +2043,7 @@ static bool amd_set_max_freq_ratio(void)
return false;
}
highest_perf = perf_caps.highest_perf;
highest_perf = amd_get_highest_perf();
nominal_perf = perf_caps.nominal_perf;
if (!highest_perf || !nominal_perf) {

6
drivers/cpufreq/acpi-cpufreq.c
View File

@ -646,7 +646,11 @@ static u64 get_max_boost_ratio(unsigned int cpu)
return 0;
}
highest_perf = perf_caps.highest_perf;
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
highest_perf = amd_get_highest_perf();
else
highest_perf = perf_caps.highest_perf;
nominal_perf = perf_caps.nominal_perf;
if (!highest_perf || !nominal_perf) {

2
kernel/sched/fair.c
View File

@ -6217,7 +6217,7 @@ static int select_idle_cpu(struct task_struct *p, struct sched_domain *sd, bool
}
if (has_idle_core)
set_idle_cores(this, false);
set_idle_cores(target, false);
if (sched_feat(SIS_PROP) && !has_idle_core) {
time = cpu_clock(this) - time;