diff options
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 3e32d620f1fb..5f04bf8419f9 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -1821,6 +1821,24 @@ static bool turbo_disabled(void) return (misc_en & MSR_IA32_MISC_ENABLE_TURBO_DISABLE); } +static bool slv_set_max_freq_ratio(u64 *base_freq, u64 *turbo_freq) +{ + int err; + + err = rdmsrl_safe(MSR_ATOM_CORE_RATIOS, base_freq); + if (err) + return false; + + err = rdmsrl_safe(MSR_ATOM_CORE_TURBO_RATIOS, turbo_freq); + if (err) + return false; + + *base_freq = (*base_freq >> 16) & 0x3F; /* max P state */ + *turbo_freq = *turbo_freq & 0x3F; /* 1C turbo */ + + return true; +} + #include <asm/cpu_device_id.h> #include <asm/intel-family.h> @@ -1938,17 +1956,14 @@ static bool core_set_max_freq_ratio(u64 *base_freq, u64 *turbo_freq) static bool intel_set_max_freq_ratio(void) { - /* - * TODO: add support for: - * - * - Atom Silvermont - */ - u64 base_freq = 1, turbo_freq = 1; if (turbo_disabled()) goto out; + if (slv_set_max_freq_ratio(&base_freq, &turbo_freq)) + goto out; + if (x86_match_cpu(has_glm_turbo_ratio_limits) && skx_set_max_freq_ratio(&base_freq, &turbo_freq, 1)) goto out; |