Add Granite Rapids Xeon D C-states support: C1, C1E, C6, and C6P. The C-states are basically the same as in Granite Rapids Xeon SP/AP, but characteristics (latency, target residency) are a bit different.
Signed-off-by: Artem Bityutskiy <artem.bityuts...@linux.intel.com> Link: https://patch.msgid.link/20241107115608.52233-1-artem.bityuts...@linux.intel.com [ rjw: Changelog edit ] Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com> Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f557e0d1c2e6 Signed-off-by: Jan Beulich <jbeul...@suse.com> --- a/xen/arch/x86/cpu/mwait-idle.c +++ b/xen/arch/x86/cpu/mwait-idle.c @@ -784,6 +784,34 @@ static const struct cpuidle_state gnr_cs {} }; +static const struct cpuidle_state gnrd_cstates[] = { + { + .name = "C1", + .flags = MWAIT2flg(0x00), + .exit_latency = 1, + .target_residency = 1, + }, + { + .name = "C1E", + .flags = MWAIT2flg(0x01), + .exit_latency = 4, + .target_residency = 4, + }, + { + .name = "C6", + .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 220, + .target_residency = 650, + }, + { + .name = "C6P", + .flags = MWAIT2flg(0x21) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 240, + .target_residency = 750, + }, + {} +}; + static const struct cpuidle_state atom_cstates[] = { { .name = "C1E", @@ -1235,6 +1263,11 @@ static const struct idle_cpu idle_cpu_gn .c1e_promotion = C1E_PROMOTION_DISABLE, }; +static const struct idle_cpu idle_cpu_gnrd = { + .state_table = gnrd_cstates, + .c1e_promotion = C1E_PROMOTION_DISABLE, +}; + static const struct idle_cpu idle_cpu_avn = { .state_table = avn_cstates, .c1e_promotion = C1E_PROMOTION_DISABLE, @@ -1310,6 +1343,7 @@ static const struct x86_cpu_id intel_idl ICPU(SAPPHIRERAPIDS_X, spr), ICPU(EMERALDRAPIDS_X, spr), ICPU(GRANITERAPIDS_X, gnr), + ICPU(GRANITERAPIDS_D, gnrd), ICPU(ATOM_GOLDMONT, bxt), ICPU(ATOM_GOLDMONT_PLUS, bxt), ICPU(ATOM_GOLDMONT_D, dnv),
