From nobody Tue Feb 10 14:25:59 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ABCD631DDB8; Mon, 9 Feb 2026 07:26:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770621974; cv=none; b=d/HUAnk0ixfzmbPf46GwqovFTLJPCT5lWp8WXyDt2ZCLvvJpoX7zVbnslk+ROoSYjbitvyJA/DDjZkADUeu3k+kljmPdtgI2/gcOBdO0NrRHMTtSefYpO9PKeALHVf5dmZV7zHyHK7fXwXdKTT8/nVx4+ZNT8v8AwE9TZj4EOd8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770621974; c=relaxed/simple; bh=hmQnHbJipSad3Ltuk+N5rXvMTH+C44IN6AhB0cqwOIM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=HBH5RXGUdH00tE58kUCuA2OnVWEDCWJryeQVCDXohyNWNtpOg6rcP7F3z7cNNgzR963mlxB5YfuYaM3rTpGNKe23/4pmPmbDspy7H2LmK4uMyNnLnvezwMERDANjeBJDCLl69N5n8M3G+a8NaLaDoj2N0F0cQWFTRhjQgKTQVa4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=MRYpzL5a; arc=none smtp.client-ip=192.198.163.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="MRYpzL5a" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1770621975; x=1802157975; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=hmQnHbJipSad3Ltuk+N5rXvMTH+C44IN6AhB0cqwOIM=; b=MRYpzL5aCA/NxM42kQgdAqSCO4UqvcAh64XgPXvEVk5OIdlfKk2FXYyw /fyjc4V/XsSSiOe6Dp0zHepT2Jd2iFDvlGPNM2JhRjxHfsu+PQwCut23y J09d8OE6XKe2KwGCTmBFWYq8EoETV/R9p1+xVW9nvRuf3Oy5gqacFwtpM +yVrczGrh76G2UGvTziKOf5aIDEoYyhp2WI6480le0ALlEhDqz91km8WI Z8ps9/cA0MG+uFOTzdgIPMRNW6xcPekU6UwOVysz/5VIrl2gWSkxNW+sS TFLbCSYxfN1Bllw1s9e+dPp1KoAyJCm3Qj6pTwOsWziKpAnWWtgpKjTlX w==; X-CSE-ConnectionGUID: /wlB+t9HRoq77D0DjvCqPw== X-CSE-MsgGUID: zEcUV+bpTuesIvwx5Sh8/A== X-IronPort-AV: E=McAfee;i="6800,10657,11695"; a="83098520" X-IronPort-AV: E=Sophos;i="6.21,281,1763452800"; d="scan'208";a="83098520" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Feb 2026 23:26:15 -0800 X-CSE-ConnectionGUID: FlkyNOt4QWiNXg7i+r8IUw== X-CSE-MsgGUID: FnXiR4ClTFup8aIHieFCOQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,281,1763452800"; d="scan'208";a="241694774" Received: from spr.sh.intel.com ([10.112.229.196]) by fmviesa001.fm.intel.com with ESMTP; 08 Feb 2026 23:26:10 -0800 From: Dapeng Mi To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Thomas Gleixner , Dave Hansen , Ian Rogers , Adrian Hunter , Jiri Olsa , Alexander Shishkin , Andi Kleen , Eranian Stephane Cc: Mark Rutland , broonie@kernel.org, Ravi Bangoria , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Zide Chen , Falcon Thomas , Dapeng Mi , Xudong Hao , Dapeng Mi Subject: [Patch v6 17/22] perf: Enhance perf_reg_validate() with simd_enabled argument Date: Mon, 9 Feb 2026 15:20:42 +0800 Message-Id: <20260209072047.2180332-18-dapeng1.mi@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260209072047.2180332-1-dapeng1.mi@linux.intel.com> References: <20260209072047.2180332-1-dapeng1.mi@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The upcoming patch will support x86 APX eGPRs sampling by using the reclaimed XMM register space to represent eGPRs in sample_regs_* fields. To differentiate between XMM and eGPRs in sample_regs_* fields, an additional argument, simd_enabled, is introduced to the perf_reg_validate() helper. If simd_enabled is set to 1, it indicates that eGPRs are represented in sample_regs_* fields for the x86 platform; otherwise, XMM registers are represented. Signed-off-by: Dapeng Mi --- V6: new patch, splited from the next patch. arch/arm/kernel/perf_regs.c | 2 +- arch/arm64/kernel/perf_regs.c | 2 +- arch/csky/kernel/perf_regs.c | 2 +- arch/loongarch/kernel/perf_regs.c | 2 +- arch/mips/kernel/perf_regs.c | 2 +- arch/parisc/kernel/perf_regs.c | 2 +- arch/powerpc/perf/perf_regs.c | 2 +- arch/riscv/kernel/perf_regs.c | 2 +- arch/s390/kernel/perf_regs.c | 2 +- arch/x86/kernel/perf_regs.c | 4 ++-- include/linux/perf_regs.h | 2 +- kernel/events/core.c | 8 +++++--- 12 files changed, 17 insertions(+), 15 deletions(-) diff --git a/arch/arm/kernel/perf_regs.c b/arch/arm/kernel/perf_regs.c index d575a4c3ca56..838d701adf4d 100644 --- a/arch/arm/kernel/perf_regs.c +++ b/arch/arm/kernel/perf_regs.c @@ -18,7 +18,7 @@ u64 perf_reg_value(struct pt_regs *regs, int idx) =20 #define REG_RESERVED (~((1ULL << PERF_REG_ARM_MAX) - 1)) =20 -int perf_reg_validate(u64 mask) +int perf_reg_validate(u64 mask, bool simd_enabled) { if (!mask || mask & REG_RESERVED) return -EINVAL; diff --git a/arch/arm64/kernel/perf_regs.c b/arch/arm64/kernel/perf_regs.c index 70e2f13f587f..71a3e0238de4 100644 --- a/arch/arm64/kernel/perf_regs.c +++ b/arch/arm64/kernel/perf_regs.c @@ -77,7 +77,7 @@ u64 perf_reg_value(struct pt_regs *regs, int idx) =20 #define REG_RESERVED (~((1ULL << PERF_REG_ARM64_MAX) - 1)) =20 -int perf_reg_validate(u64 mask) +int perf_reg_validate(u64 mask, bool simd_enabled) { u64 reserved_mask =3D REG_RESERVED; =20 diff --git a/arch/csky/kernel/perf_regs.c b/arch/csky/kernel/perf_regs.c index 94601f37b596..c932a96afc56 100644 --- a/arch/csky/kernel/perf_regs.c +++ b/arch/csky/kernel/perf_regs.c @@ -18,7 +18,7 @@ u64 perf_reg_value(struct pt_regs *regs, int idx) =20 #define REG_RESERVED (~((1ULL << PERF_REG_CSKY_MAX) - 1)) =20 -int perf_reg_validate(u64 mask) +int perf_reg_validate(u64 mask, bool simd_enabled) { if (!mask || mask & REG_RESERVED) return -EINVAL; diff --git a/arch/loongarch/kernel/perf_regs.c b/arch/loongarch/kernel/perf= _regs.c index 8dd604f01745..164514f40ae0 100644 --- a/arch/loongarch/kernel/perf_regs.c +++ b/arch/loongarch/kernel/perf_regs.c @@ -25,7 +25,7 @@ u64 perf_reg_abi(struct task_struct *tsk) } #endif /* CONFIG_32BIT */ =20 -int perf_reg_validate(u64 mask) +int perf_reg_validate(u64 mask, bool simd_enabled) { if (!mask) return -EINVAL; diff --git a/arch/mips/kernel/perf_regs.c b/arch/mips/kernel/perf_regs.c index 7736d3c5ebd2..00a5201dbd5d 100644 --- a/arch/mips/kernel/perf_regs.c +++ b/arch/mips/kernel/perf_regs.c @@ -28,7 +28,7 @@ u64 perf_reg_abi(struct task_struct *tsk) } #endif /* CONFIG_32BIT */ =20 -int perf_reg_validate(u64 mask) +int perf_reg_validate(u64 mask, bool simd_enabled) { if (!mask) return -EINVAL; diff --git a/arch/parisc/kernel/perf_regs.c b/arch/parisc/kernel/perf_regs.c index b9fe1f2fcb9b..4f21aab5405c 100644 --- a/arch/parisc/kernel/perf_regs.c +++ b/arch/parisc/kernel/perf_regs.c @@ -34,7 +34,7 @@ u64 perf_reg_value(struct pt_regs *regs, int idx) =20 #define REG_RESERVED (~((1ULL << PERF_REG_PARISC_MAX) - 1)) =20 -int perf_reg_validate(u64 mask) +int perf_reg_validate(u64 mask, bool simd_enabled) { if (!mask || mask & REG_RESERVED) return -EINVAL; diff --git a/arch/powerpc/perf/perf_regs.c b/arch/powerpc/perf/perf_regs.c index 350dccb0143c..a01d8a903640 100644 --- a/arch/powerpc/perf/perf_regs.c +++ b/arch/powerpc/perf/perf_regs.c @@ -125,7 +125,7 @@ u64 perf_reg_value(struct pt_regs *regs, int idx) return regs_get_register(regs, pt_regs_offset[idx]); } =20 -int perf_reg_validate(u64 mask) +int perf_reg_validate(u64 mask, bool simd_enabled) { if (!mask || mask & REG_RESERVED) return -EINVAL; diff --git a/arch/riscv/kernel/perf_regs.c b/arch/riscv/kernel/perf_regs.c index 3bba8deababb..1ecc8760b88b 100644 --- a/arch/riscv/kernel/perf_regs.c +++ b/arch/riscv/kernel/perf_regs.c @@ -18,7 +18,7 @@ u64 perf_reg_value(struct pt_regs *regs, int idx) =20 #define REG_RESERVED (~((1ULL << PERF_REG_RISCV_MAX) - 1)) =20 -int perf_reg_validate(u64 mask) +int perf_reg_validate(u64 mask, bool simd_enabled) { if (!mask || mask & REG_RESERVED) return -EINVAL; diff --git a/arch/s390/kernel/perf_regs.c b/arch/s390/kernel/perf_regs.c index 7b305f1456f8..6496fd23c540 100644 --- a/arch/s390/kernel/perf_regs.c +++ b/arch/s390/kernel/perf_regs.c @@ -34,7 +34,7 @@ u64 perf_reg_value(struct pt_regs *regs, int idx) =20 #define REG_RESERVED (~((1UL << PERF_REG_S390_MAX) - 1)) =20 -int perf_reg_validate(u64 mask) +int perf_reg_validate(u64 mask, bool simd_enabled) { if (!mask || mask & REG_RESERVED) return -EINVAL; diff --git a/arch/x86/kernel/perf_regs.c b/arch/x86/kernel/perf_regs.c index 2e3c10dffb35..9b3134220b3e 100644 --- a/arch/x86/kernel/perf_regs.c +++ b/arch/x86/kernel/perf_regs.c @@ -166,7 +166,7 @@ int perf_simd_reg_validate(u16 vec_qwords, u64 vec_mask, (1ULL << PERF_REG_X86_R14) | \ (1ULL << PERF_REG_X86_R15)) =20 -int perf_reg_validate(u64 mask) +int perf_reg_validate(u64 mask, bool simd_enabled) { if (!mask || (mask & (REG_NOSUPPORT | PERF_REG_X86_RESERVED))) return -EINVAL; @@ -185,7 +185,7 @@ u64 perf_reg_abi(struct task_struct *task) (1ULL << PERF_REG_X86_FS) | \ (1ULL << PERF_REG_X86_GS)) =20 -int perf_reg_validate(u64 mask) +int perf_reg_validate(u64 mask, bool simd_enabled) { /* The mask could be 0 if only the SIMD registers are interested */ if (mask & (REG_NOSUPPORT | PERF_REG_X86_RESERVED)) diff --git a/include/linux/perf_regs.h b/include/linux/perf_regs.h index 518f28c6a7d4..09dbc2fc3859 100644 --- a/include/linux/perf_regs.h +++ b/include/linux/perf_regs.h @@ -10,7 +10,7 @@ struct perf_regs { }; =20 u64 perf_reg_value(struct pt_regs *regs, int idx); -int perf_reg_validate(u64 mask); +int perf_reg_validate(u64 mask, bool simd_enabled); u64 perf_reg_abi(struct task_struct *task); void perf_get_regs_user(struct perf_regs *regs_user, struct pt_regs *regs); diff --git a/kernel/events/core.c b/kernel/events/core.c index 5742126f50cc..8b27b4873dd0 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -7728,7 +7728,7 @@ u64 __weak perf_reg_value(struct pt_regs *regs, int i= dx) return 0; } =20 -int __weak perf_reg_validate(u64 mask) +int __weak perf_reg_validate(u64 mask, bool simd_enabled) { return mask ? -ENOSYS : 0; } @@ -13614,7 +13614,8 @@ static int perf_copy_attr(struct perf_event_attr __= user *uattr, } =20 if (attr->sample_type & PERF_SAMPLE_REGS_USER) { - ret =3D perf_reg_validate(attr->sample_regs_user); + ret =3D perf_reg_validate(attr->sample_regs_user, + attr->sample_simd_regs_enabled); if (ret) return ret; ret =3D perf_simd_reg_validate(attr->sample_simd_vec_reg_qwords, @@ -13644,7 +13645,8 @@ static int perf_copy_attr(struct perf_event_attr __= user *uattr, attr->sample_max_stack =3D sysctl_perf_event_max_stack; =20 if (attr->sample_type & PERF_SAMPLE_REGS_INTR) { - ret =3D perf_reg_validate(attr->sample_regs_intr); + ret =3D perf_reg_validate(attr->sample_regs_intr, + attr->sample_simd_regs_enabled); if (ret) return ret; ret =3D perf_simd_reg_validate(attr->sample_simd_vec_reg_qwords, --=20 2.34.1