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Tue, 18 Nov 2025 07:07:24 -0800 (PST) Message-ID: <505029ff-cb2e-425c-bf5c-3ac364f32140@suse.com> Date: Tue, 18 Nov 2025 16:07:23 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: [PATCH 4/8] x86: replace APERFMPERF synthetic feature bit From: Jan Beulich To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= References: <53ef6c9a-1115-4bb4-bb7f-e2595ab9d0b6@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: <53ef6c9a-1115-4bb4-bb7f-e2595ab9d0b6@suse.com> Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1763478466717158500 Content-Type: text/plain; charset="utf-8" Use the respective host CPU policy bit instead. Signed-off-by: Jan Beulich --- a/xen/arch/x86/cpu/common.c +++ b/xen/arch/x86/cpu/common.c @@ -523,10 +523,6 @@ static void generic_identify(struct cpui if ( cpu_has(c, X86_FEATURE_CLFLUSH) ) c->x86_clflush_size =3D ((ebx >> 8) & 0xff) * 8; =20 - if ( (c->cpuid_level >=3D CPUID_PM_LEAF) && - (cpuid_ecx(CPUID_PM_LEAF) & CPUID6_ECX_APERFMPERF_CAPABILITY) ) - __set_bit(X86_FEATURE_APERFMPERF, c->x86_capability); - /* AMD-defined flags: level 0x80000001 */ if (c->extended_cpuid_level >=3D 0x80000001) cpuid(0x80000001, &tmp, &tmp, --- a/xen/arch/x86/include/asm/cpufeature.h +++ b/xen/arch/x86/include/asm/cpufeature.h @@ -11,7 +11,9 @@ #include =20 #ifndef __ASSEMBLY__ +#include #include +#include #else #include #endif @@ -121,7 +123,6 @@ static inline bool boot_cpu_has(unsigned #define CPUID6_EAX_HDC BIT(13, U) #define CPUID6_EAX_HWP_PECI BIT(16, U) #define CPUID6_EAX_HW_FEEDBACK BIT(19, U) -#define CPUID6_ECX_APERFMPERF_CAPABILITY BIT(0, U) =20 /* CPUID level 0x00000001.edx */ #define cpu_has_fpu 1 @@ -175,6 +176,9 @@ static inline bool boot_cpu_has(unsigned #define cpu_has_fma4 boot_cpu_has(X86_FEATURE_FMA4) #define cpu_has_tbm boot_cpu_has(X86_FEATURE_TBM) =20 +/* CPUID level 0x00000006.ecx */ +#define cpu_has_aperfmperf host_cpu_policy.basic.pm.aperfmperf + /* CPUID level 0x0000000D:1.eax */ #define cpu_has_xsaveopt boot_cpu_has(X86_FEATURE_XSAVEOPT) #define cpu_has_xsavec boot_cpu_has(X86_FEATURE_XSAVEC) @@ -292,7 +296,6 @@ static inline bool boot_cpu_has(unsigned /* Synthesized. */ #define cpu_has_arch_perfmon boot_cpu_has(X86_FEATURE_ARCH_PERFMON) #define cpu_has_cpuid_faulting boot_cpu_has(X86_FEATURE_CPUID_FAULTING) -#define cpu_has_aperfmperf boot_cpu_has(X86_FEATURE_APERFMPERF) #define cpu_has_xen_lbr boot_cpu_has(X86_FEATURE_XEN_LBR) #define cpu_has_xen_shstk (IS_ENABLED(CONFIG_XEN_SHSTK) && \ boot_cpu_has(X86_FEATURE_XEN_SHSTK)) --- a/xen/arch/x86/include/asm/cpufeatures.h +++ b/xen/arch/x86/include/asm/cpufeatures.h @@ -19,7 +19,7 @@ XEN_CPUFEATURE(TSC_RELIABLE, X86_SY XEN_CPUFEATURE(XTOPOLOGY, X86_SYNTH( 5)) /* cpu topology enum exte= nsions */ XEN_CPUFEATURE(CPUID_FAULTING, X86_SYNTH( 6)) /* cpuid faulting */ XEN_CPUFEATURE(XEN_FRED, X86_SYNTH( 7)) /* Xen uses FRED */ -XEN_CPUFEATURE(APERFMPERF, X86_SYNTH( 8)) /* APERFMPERF */ +/* Bit 8 unused */ XEN_CPUFEATURE(MFENCE_RDTSC, X86_SYNTH( 9)) /* MFENCE synchronizes RD= TSC */ XEN_CPUFEATURE(XEN_SMEP, X86_SYNTH(10)) /* SMEP gets used by Xen = itself */ XEN_CPUFEATURE(XEN_SMAP, X86_SYNTH(11)) /* SMAP gets used by Xen = itself */