From 37fa335a95ccb0327cdfcb8f60dd265d7c4eae1a Mon Sep 17 00:00:00 2001 From: Dasaratharaman Chandramouli Date: Fri, 8 Apr 2016 22:32:36 +0200 Subject: [PATCH] mwait-idle: support for Intel Xeon Phi Processor x200 Product Family Enables "Intel(R) Xeon Phi(TM) Processor x200 Product Family" support, formerly code-named KNL. It is based on modified Intel Atom Silvermont microarchitecture. Signed-off-by: Dasaratharaman Chandramouli [micah.barany@intel.com: adjusted values of residency and latency] Signed-off-by: Micah Barany [Linux commit: 281baf7a702693deaa45c98ef0c5161006b48257] Signed-off-by: Jan Beulich Acked-by: Andrew Cooper --- xen/arch/x86/cpu/mwait-idle.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/xen/arch/x86/cpu/mwait-idle.c b/xen/arch/x86/cpu/mwait-idle.c index 9e193155ca..6e65e38ea3 100644 --- a/xen/arch/x86/cpu/mwait-idle.c +++ b/xen/arch/x86/cpu/mwait-idle.c @@ -574,6 +574,22 @@ static const struct cpuidle_state avn_cstates[] = { {} }; +static const struct cpuidle_state knl_cstates[] = { + { + .name = "C1-KNL", + .flags = MWAIT2flg(0x00), + .exit_latency = 1, + .target_residency = 2, + }, + { + .name = "C6-KNL", + .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 120, + .target_residency = 500, + }, + {} +}; + static void mwait_idle(void) { unsigned int cpu = smp_processor_id(); @@ -746,6 +762,10 @@ static const struct idle_cpu idle_cpu_avn = { .disable_promotion_to_c1e = 1, }; +static const struct idle_cpu idle_cpu_knl = { + .state_table = knl_cstates, +}; + #define ICPU(model, cpu) \ { X86_VENDOR_INTEL, 6, model, X86_FEATURE_MONITOR, \ &idle_cpu_##cpu} @@ -778,6 +798,7 @@ static const struct x86_cpu_id intel_idle_ids[] __initconst = { ICPU(0x56, bdw), ICPU(0x4e, skl), ICPU(0x5e, skl), + ICPU(0x57, knl), {} }; -- 2.30.2