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Tue, 08 Jul 2025 06:00:10 -0700 (PDT) Message-ID: <9aaea4c3-6563-4c76-baf1-55ea18210fbf@suse.com> Date: Tue, 8 Jul 2025 15:00:03 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: [PATCH 6/9] x86/mwait-idle: add Sierra Forest SoC 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: 1751979627394116600 Content-Type: text/plain; charset="utf-8" Add Sierra Forest SoC C-states, which are C1, C1E, C6S, and C6SP. Sierra Forest SoC is built with modules, each module includes 4 cores (Crestmont microarchitecture). There is one L2 cache per module, shared between the 4 cores. There is no core C6 state, but there is C6S state, which has module scope: when all 4 cores request C6S, the entire module (4 cores + L2 cache) enters the low power state. C6SP state has package scope - when all modules in the package enter C6S, the package enters the power state mode. Signed-off-by: Artem Bityutskiy Signed-off-by: Rafael J. Wysocki Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 92= 813fd5b156 Signed-off-by: Jan Beulich --- a/xen/arch/x86/cpu/mwait-idle.c +++ b/xen/arch/x86/cpu/mwait-idle.c @@ -950,6 +950,34 @@ static const struct cpuidle_state grr_cs {} }; =20 +static const struct cpuidle_state srf_cstates[] =3D { + { + .name =3D "C1", + .flags =3D MWAIT2flg(0x00), + .exit_latency =3D 1, + .target_residency =3D 1, + }, + { + .name =3D "C1E", + .flags =3D MWAIT2flg(0x01), + .exit_latency =3D 2, + .target_residency =3D 10, + }, + { + .name =3D "C6S", + .flags =3D MWAIT2flg(0x22) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency =3D 270, + .target_residency =3D 700, + }, + { + .name =3D "C6SP", + .flags =3D MWAIT2flg(0x23) | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency =3D 310, + .target_residency =3D 900, + }, + {} +}; + static void cf_check mwait_idle(void) { unsigned int cpu =3D smp_processor_id(); @@ -1199,6 +1227,11 @@ static const struct idle_cpu idle_cpu_gr .c1e_promotion =3D C1E_PROMOTION_DISABLE, }; =20 +static const struct idle_cpu idle_cpu_srf =3D { + .state_table =3D srf_cstates, + .c1e_promotion =3D C1E_PROMOTION_DISABLE, +}; + #define ICPU(model, cpu) \ { X86_VENDOR_INTEL, 6, INTEL_FAM6_ ## model, X86_FEATURE_ALWAYS, \ &idle_cpu_ ## cpu} @@ -1248,6 +1281,7 @@ static const struct x86_cpu_id intel_idl ICPU(ATOM_GOLDMONT_D, dnv), ICPU(ATOM_TREMONT_D, snr), ICPU(ATOM_CRESTMONT, grr), + ICPU(ATOM_CRESTMONT_X, srf), {} };