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Tue, 08 Jul 2025 05:57:44 -0700 (PDT) Message-ID: Date: Tue, 8 Jul 2025 14:57:37 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: [PATCH 2/9] x86/mwait-idle: Add AlderLake-N support From: Jan Beulich To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= References: <1df49875-99b8-4302-aed7-5a75dbdd85ca@suse.com> Content-Language: en-US Autocrypt: addr=jbeulich@suse.com; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJgBBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AACgkQoDSui/t3IH4J+wCfQ5jHdEjCRHj23O/5ttg9r9OIruwAn3103WUITZee e7Sbg12UgcQ5lv7SzsFNBFk3nEQQCACCuTjCjFOUdi5Nm244F+78kLghRcin/awv+IrTcIWF hUpSs1Y91iQQ7KItirz5uwCPlwejSJDQJLIS+QtJHaXDXeV6NI0Uef1hP20+y8qydDiVkv6l IreXjTb7DvksRgJNvCkWtYnlS3mYvQ9NzS9PhyALWbXnH6sIJd2O9lKS1Mrfq+y0IXCP10eS FFGg+Av3IQeFatkJAyju0PPthyTqxSI4lZYuJVPknzgaeuJv/2NccrPvmeDg6Coe7ZIeQ8Yj t0ARxu2xytAkkLCel1Lz1WLmwLstV30g80nkgZf/wr+/BXJW/oIvRlonUkxv+IbBM3dX2OV8 AmRv1ySWPTP7AAMFB/9PQK/VtlNUJvg8GXj9ootzrteGfVZVVT4XBJkfwBcpC/XcPzldjv+3 HYudvpdNK3lLujXeA5fLOH+Z/G9WBc5pFVSMocI71I8bT8lIAzreg0WvkWg5V2WZsUMlnDL9 mpwIGFhlbM3gfDMs7MPMu8YQRFVdUvtSpaAs8OFfGQ0ia3LGZcjA6Ik2+xcqscEJzNH+qh8V m5jjp28yZgaqTaRbg3M/+MTbMpicpZuqF4rnB0AQD12/3BNWDR6bmh+EkYSMcEIpQmBM51qM EKYTQGybRCjpnKHGOxG0rfFY1085mBDZCH5Kx0cl0HVJuQKC+dV2ZY5AqjcKwAxpE75MLFkr wkkEGBECAAkFAlk3nEQCGwwACgkQoDSui/t3IH7nnwCfcJWUDUFKdCsBH/E5d+0ZnMQi+G0A nAuWpQkjM1ASeQwSHEeAWPgskBQL In-Reply-To: <1df49875-99b8-4302-aed7-5a75dbdd85ca@suse.com> Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1751979478604116600 Content-Type: text/plain; charset="utf-8" Similar to the other other AlderLake platforms, the C1 and C1E states on ADL-N are mutually exclusive. Only one of them can be enabled at a time. C1E is preferred on ADL-N for better energy efficiency. C6S is also supported on this platform. Its latency is far bigger than C6, but really close to C8 (PC8), thus it is not exposed as a separate state. Suggested-by: Baieswara Reddy Sagili Suggested-by: Vinay Kumar Signed-off-by: Zhang Rui [ rjw: Changelog edits ] Signed-off-by: Rafael J. Wysocki Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 65= c0c2367e9e x86/cpu: Fix Gracemont uarch Alderlake N is an E-core only product using Gracemont micro-architecture. It fits the pre-existing naming scheme perfectly fine, adhere to it. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Hans de Goede Link: https://lore.kernel.org/r/20230807150405.686834933@infradead.org Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 88= 2cdb06b668 Signed-off-by: Jan Beulich --- a/xen/arch/x86/cpu/mwait-idle.c +++ b/xen/arch/x86/cpu/mwait-idle.c @@ -678,6 +678,40 @@ static struct cpuidle_state __ro_after_i {} }; =20 +static const struct cpuidle_state gmt_cstates[] =3D { + { + .name =3D "C1", + .flags =3D MWAIT2flg(0x00) | CPUIDLE_FLAG_DISABLED, + .exit_latency =3D 1, + .target_residency =3D 1, + }, + { + .name =3D "C1E", + .flags =3D MWAIT2flg(0x01), + .exit_latency =3D 2, + .target_residency =3D 4, + }, + { + .name =3D "C6", + .flags =3D MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency =3D 195, + .target_residency =3D 585, + }, + { + .name =3D "C8", + .flags =3D MWAIT2flg(0x40) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency =3D 260, + .target_residency =3D 1040, + }, + { + .name =3D "C10", + .flags =3D MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency =3D 660, + .target_residency =3D 1980, + }, + {} +}; + static struct cpuidle_state __ro_after_init spr_cstates[] =3D { { .name =3D "C1", @@ -1083,6 +1117,10 @@ static struct idle_cpu __ro_after_init i .state_table =3D adl_l_cstates, }; =20 +static const struct idle_cpu idle_cpu_gmt =3D { + .state_table =3D gmt_cstates, +}; + static const struct idle_cpu idle_cpu_spr =3D { .state_table =3D spr_cstates, .c1e_promotion =3D C1E_PROMOTION_DISABLE, @@ -1148,6 +1186,7 @@ static const struct x86_cpu_id intel_idl ICPU(ICELAKE_D, icx), ICPU(ALDERLAKE, adl), ICPU(ALDERLAKE_L, adl_l), + ICPU(ATOM_GRACEMONT, gmt), ICPU(SAPPHIRERAPIDS_X, spr), ICPU(ATOM_GOLDMONT, bxt), ICPU(ATOM_GOLDMONT_PLUS, bxt), @@ -1386,6 +1425,7 @@ static void __init mwait_idle_state_tabl break; case INTEL_FAM6_ALDERLAKE: case INTEL_FAM6_ALDERLAKE_L: + case INTEL_FAM6_ATOM_GRACEMONT: adl_idle_state_table_update(); break; }