From 370406bf5738dade8ac95a2ee95c29299d4ac902 Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Tue, 6 Aug 2024 19:03:10 +0300 Subject: [PATCH] intel_idle: add Granite Rapids Xeon support Add Granite Rapids Xeon C-states, which are C1, C1E, C6, and C6P. Comparing to previous Xeon Generations (e.g., Emerald Rapids), C6 requests end up only in core C6 state, and no package C-state promotion takes place even if all cores in the package are in core C6. C6P requests also end up in core C6, but if all cores have requested C6P, the SoC will enter the package C6 state. Signed-off-by: Artem Bityutskiy Link: https://patch.msgid.link/20240806160310.3719205-1-artem.bityutskiy@linux.intel.com [ rjw: Changelog edits ] Signed-off-by: Rafael J. Wysocki --- drivers/idle/intel_idle.c | 46 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 9aab7abc2ae90..e20f57ac307ea 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -1022,6 +1022,45 @@ static struct cpuidle_state spr_cstates[] __initdata = { .enter = NULL } }; +static struct cpuidle_state gnr_cstates[] __initdata = { + { + .name = "C1", + .desc = "MWAIT 0x00", + .flags = MWAIT2flg(0x00), + .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 = 4, + .target_residency = 4, + .enter = &intel_idle, + .enter_s2idle = intel_idle_s2idle, }, + { + .name = "C6", + .desc = "MWAIT 0x20", + .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED | + CPUIDLE_FLAG_INIT_XSTATE, + .exit_latency = 170, + .target_residency = 650, + .enter = &intel_idle, + .enter_s2idle = intel_idle_s2idle, }, + { + .name = "C6P", + .desc = "MWAIT 0x21", + .flags = MWAIT2flg(0x21) | CPUIDLE_FLAG_TLB_FLUSHED | + CPUIDLE_FLAG_INIT_XSTATE, + .exit_latency = 210, + .target_residency = 1000, + .enter = &intel_idle, + .enter_s2idle = intel_idle_s2idle, }, + { + .enter = NULL } +}; + static struct cpuidle_state atom_cstates[] __initdata = { { .name = "C1E", @@ -1453,6 +1492,12 @@ static const struct idle_cpu idle_cpu_spr __initconst = { .use_acpi = true, }; +static const struct idle_cpu idle_cpu_gnr __initconst = { + .state_table = gnr_cstates, + .disable_promotion_to_c1e = true, + .use_acpi = true, +}; + static const struct idle_cpu idle_cpu_avn __initconst = { .state_table = avn_cstates, .disable_promotion_to_c1e = true, @@ -1533,6 +1578,7 @@ static const struct x86_cpu_id intel_idle_ids[] __initconst = { X86_MATCH_VFM(INTEL_ATOM_GRACEMONT, &idle_cpu_gmt), X86_MATCH_VFM(INTEL_SAPPHIRERAPIDS_X, &idle_cpu_spr), X86_MATCH_VFM(INTEL_EMERALDRAPIDS_X, &idle_cpu_spr), + X86_MATCH_VFM(INTEL_GRANITERAPIDS_X, &idle_cpu_gnr), X86_MATCH_VFM(INTEL_XEON_PHI_KNL, &idle_cpu_knl), X86_MATCH_VFM(INTEL_XEON_PHI_KNM, &idle_cpu_knl), X86_MATCH_VFM(INTEL_ATOM_GOLDMONT, &idle_cpu_bxt), -- 2.47.2