From 4c6cd64519f9bc270a7278128c94e4b66e3d2077 Mon Sep 17 00:00:00 2001 From: Len Brown Date: Mon, 30 Nov 2015 12:02:22 +0100 Subject: [PATCH] mwait_idle: Skylake Client Support Skylake Client CPU idle Power states (C-states) are similar to the previous generation, Broadwell. However, Skylake does get its own table with updated worst-case latency and average energy-break-even residency values. Signed-off-by: Len Brown [Linux commit 493f133f47750aa5566fafa9403617e3f0506f8c] mwait_idle: Skylake Client Support - updated Addition of PC9 state, and minor tweaks to existing PC6 and PC8 states. Signed-off-by: Len Brown [Linux commit 135919a3a80565070b9645009e65f73e72c661c0] Signed-off-by: Jan Beulich Acked-by: Andrew Cooper --- xen/arch/x86/cpu/mwait-idle.c | 59 +++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) diff --git a/xen/arch/x86/cpu/mwait-idle.c b/xen/arch/x86/cpu/mwait-idle.c index 07d8794f22..87f0e60a80 100644 --- a/xen/arch/x86/cpu/mwait-idle.c +++ b/xen/arch/x86/cpu/mwait-idle.c @@ -477,6 +477,58 @@ static const struct cpuidle_state bdw_cstates[] = { {} }; +static const struct cpuidle_state skl_cstates[] = { + { + .name = "C1-SKL", + .flags = MWAIT2flg(0x00), + .exit_latency = 2, + .target_residency = 2, + }, + { + .name = "C1E-SKL", + .flags = MWAIT2flg(0x01), + .exit_latency = 10, + .target_residency = 20, + }, + { + .name = "C3-SKL", + .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 70, + .target_residency = 100, + }, + { + .name = "C6-SKL", + .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 85, + .target_residency = 200, + }, + { + .name = "C7s-SKL", + .flags = MWAIT2flg(0x33) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 124, + .target_residency = 800, + }, + { + .name = "C8-SKL", + .flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 200, + .target_residency = 800, + }, + { + .name = "C9-SKL", + .flags = MWAIT2flg(0x50) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 480, + .target_residency = 5000, + }, + { + .name = "C10-SKL", + .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 890, + .target_residency = 5000, + }, + {} +}; + static const struct cpuidle_state atom_cstates[] = { { .name = "C1E-ATM", @@ -683,6 +735,11 @@ static const struct idle_cpu idle_cpu_bdw = { .disable_promotion_to_c1e = 1, }; +static const struct idle_cpu idle_cpu_skl = { + .state_table = skl_cstates, + .disable_promotion_to_c1e = 1, +}; + static const struct idle_cpu idle_cpu_avn = { .state_table = avn_cstates, .disable_promotion_to_c1e = 1, @@ -718,6 +775,8 @@ static const struct x86_cpu_id intel_idle_ids[] __initconst = { ICPU(0x47, bdw), ICPU(0x4f, bdw), ICPU(0x56, bdw), + ICPU(0x4e, skl), + ICPU(0x5e, skl), {} }; -- 2.30.2