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intel_idle: add Sierra Forest SoC support

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Add Sierra Forest SoC C-states, which are C1, C1E, C6S, and C6SP.

Sierra Forest SoC is built with modules, each module includes 4 cores
(Crestmont microarchitecture). There is one L2 cache per module, shared
between the 4 cores.

There is no core C6 state, but there is C6S state, which has module scope:
when all 4 cores request C6S, the entire module (4 cores + L2 cache)
enters the low power state.

C6SP state has package scope - when all modules in the package enter C6S,
the package enters the power state mode.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Artem Bityutskiy 2023-12-14 18:56:22 +02:00 committed by Rafael J. Wysocki
parent ac89d11b93
commit 92813fd5b1
1 changed files with 44 additions and 0 deletions
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44
drivers/idle/intel_idle.c
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@ -1300,6 +1300,43 @@ static struct cpuidle_state grr_cstates[] __initdata = {
.enter = NULL }
};
static struct cpuidle_state srf_cstates[] __initdata = {
{
.name = "C1",
.desc = "MWAIT 0x00",
.flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_ALWAYS_ENABLE,
.exit_latency = 1,
.target_residency = 1,
.enter = &intel_idle,
.enter_s2idle = intel_idle_s2idle, },
{
.name = "C1E",
.desc = "MWAIT 0x01",
.flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_ALWAYS_ENABLE,
.exit_latency = 2,
.target_residency = 10,
.enter = &intel_idle,
.enter_s2idle = intel_idle_s2idle, },
{
.name = "C6S",
.desc = "MWAIT 0x22",
.flags = MWAIT2flg(0x22) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 270,
.target_residency = 700,
.enter = &intel_idle,
.enter_s2idle = intel_idle_s2idle, },
{
.name = "C6SP",
.desc = "MWAIT 0x23",
.flags = MWAIT2flg(0x23) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 310,
.target_residency = 900,
.enter = &intel_idle,
.enter_s2idle = intel_idle_s2idle, },
{
.enter = NULL }
};
static const struct idle_cpu idle_cpu_nehalem __initconst = {
.state_table = nehalem_cstates,
.auto_demotion_disable_flags = NHM_C1_AUTO_DEMOTE | NHM_C3_AUTO_DEMOTE,
@ -1455,6 +1492,12 @@ static const struct idle_cpu idle_cpu_grr __initconst = {
.use_acpi = true,
};
static const struct idle_cpu idle_cpu_srf __initconst = {
.state_table = srf_cstates,
.disable_promotion_to_c1e = true,
.use_acpi = true,
};
static const struct x86_cpu_id intel_idle_ids[] __initconst = {
X86_MATCH_INTEL_FAM6_MODEL(NEHALEM_EP, &idle_cpu_nhx),
X86_MATCH_INTEL_FAM6_MODEL(NEHALEM, &idle_cpu_nehalem),
@ -1502,6 +1545,7 @@ static const struct x86_cpu_id intel_idle_ids[] __initconst = {
X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_D, &idle_cpu_dnv),
X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT_D, &idle_cpu_snr),
X86_MATCH_INTEL_FAM6_MODEL(ATOM_CRESTMONT, &idle_cpu_grr),
X86_MATCH_INTEL_FAM6_MODEL(ATOM_CRESTMONT_X, &idle_cpu_srf),
{}
};