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a=rsa-sha256; c=relaxed/relaxed; d=alex0.net; s=sig1; bh=DX3etFGTu25f/iDa1r4MdVGbHdmW9qxL6IE5FDD4IRI=; h=From:To:Subject:Date:Message-ID:MIME-Version:x-icloud-hme; b=QsBWq3tDftHorSetMIRuF+ptluneNwrkiD0wqFBkp1b1bXHFogMYrY+iZSFhgsrT0 AzjtJH+fpjjbM7S2J/+boOs33k68WcBf5msV80FBFvhWwKtHOYKGOUeRxfSJSCaMF9 24ZFhtRMofHDzODn4diek2p1Cx5WBSm5YeyxEMzxa7jLFYBDT59YNxmO5FWL1x8ieE 6Vs4TD+y/XXqPT+M9tzF5MhAHqkIvZlzIFT7NgUdFRJHUx3jlDc9R+zdbSSP/ZiJOQ aDJBvg24LAdtiyUyrTzQEg5nd+k5GdOORIq6Qqmu6ydy7ggSlxXxxmFl31Cb1wA5Nh C21haW2uyDElQ== From: Alex XZ Cypher Zero To: xen-devel@lists.xenproject.org Cc: Alex XZ Cypher Zero , Jan Beulich , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Subject: [PATCH v2] x86/idle: Implement support for Meteor Lake Date: Tue, 8 Jul 2025 11:09:44 +0100 Message-ID: <4f6cad808ae9ada51e873a411d774dafad4a49cd.1751969384.git.me@alex0.net> X-Mailer: git-send-email 2.50.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzA4MDA4MyBTYWx0ZWRfX2vs/Fdu+5J6i COS7KDtmc+cN1QQR3FDvrVuqv1ft92qcs1lPVG0NiVTnwgpqB8Le1QQ3lMnwJe2vTayo18Lk/LG TWbal+1SQP6G/ESrUYwauEuOnB29vrikZ+X4ulFnUe6Xkc0Djpnam74k9ps9al/rVvvB1ff8MWE Hv3ormSfZjFq2cyhJw82UVLURIToMO6UbPc03qNd4q17FWH7c56jVonBzyWS7NyHbF+XbPKlfBa cN+DDCG5F75eeT9FbyiELnn/HLGP/NaAmFAtsUFeXup3MyccK+cSRRCTFixkQXcoAwqYAEFJM= X-Proofpoint-GUID: PIo9OZrGcl7BC5v-lJvR5A08lH9wikbt X-Proofpoint-ORIG-GUID: PIo9OZrGcl7BC5v-lJvR5A08lH9wikbt X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-07-08_03,2025-07-07_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 malwarescore=0 mlxscore=0 adultscore=0 clxscore=1030 mlxlogscore=530 phishscore=0 spamscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.22.0-2506060001 definitions=main-2507080083 X-ZohoMail-DKIM: pass (identity @alex0.net) X-ZM-MESSAGEID: 1751969434048116600 Content-Type: text/plain; charset="utf-8" Adds support for Meteor Lake C-states, following the reference implementati= on in Linux. Signed-off-by: Alex XZ Cypher Zero --- xen/arch/x86/cpu/mwait-idle.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/xen/arch/x86/cpu/mwait-idle.c b/xen/arch/x86/cpu/mwait-idle.c index 5e98011bfd..1e90806c70 100644 --- a/xen/arch/x86/cpu/mwait-idle.c +++ b/xen/arch/x86/cpu/mwait-idle.c @@ -678,6 +678,28 @@ static struct cpuidle_state __read_mostly adl_l_cstate= s[] =3D { {} }; =20 +static struct cpuidle_state __read_mostly mtl_l_cstates[] =3D { + { + .name =3D "C1E", + .flags =3D MWAIT2flg(0x01), + .exit_latency =3D 1, + .target_residency =3D 1, + }, + { + .name =3D "C6", + .flags =3D MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency =3D 140, + .target_residency =3D 420 + }, + { + .name =3D "C10", + .flags =3D MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency =3D 310, + .target_residency =3D 930 + }, + {} +}; + static struct cpuidle_state __read_mostly spr_cstates[] =3D { { .name =3D "C1", @@ -1083,6 +1105,10 @@ static struct idle_cpu __read_mostly idle_cpu_adl_l = =3D { .state_table =3D adl_l_cstates, }; =20 +static struct idle_cpu __read_mostly idle_cpu_mtl_l =3D { + .state_table =3D mtl_l_cstates, +}; + static struct idle_cpu __read_mostly idle_cpu_spr =3D { .state_table =3D spr_cstates, .c1e_promotion =3D C1E_PROMOTION_DISABLE, @@ -1148,6 +1174,7 @@ static const struct x86_cpu_id intel_idle_ids[] __ini= tconstrel =3D { ICPU(ICELAKE_D, icx), ICPU(ALDERLAKE, adl), ICPU(ALDERLAKE_L, adl_l), + ICPU(METEORLAKE_L, mtl_l), ICPU(SAPPHIRERAPIDS_X, spr), ICPU(ATOM_GOLDMONT, bxt), ICPU(ATOM_GOLDMONT_PLUS, bxt), --=20 2.50.0