From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 5099B51588D for ; Fri, 18 Sep 2026 16:14:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789748071; cv=none; b=nnWEHy8UWXcEgBuOc4OaqiIbzOAJh2Mw+nPaLWx9/Pyp2WIrZkMmf4+Vj9JCQHbV+aM9OhakdQTZh0LDhnGhvEfi74/V66EfJ0vzUHUmbWqwvJ0lZz8jpD+Y4zit0I5Lv2wFhAA+3MQepR0i3c1kxT5RcMSei1U4C4ezuvPo2+4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789748071; c=relaxed/simple; bh=qskTDOTZ3X/eC+QtrSnYkRmfA8VXtYLdU8LszGaACHQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FFbvKjB8SqmHExhPZM7W5dUxwOD5xTI8y8eneLRhI0wcqLyTHzlYruY/l8C/Do3uGmf5vp0xgL2ZQ9mQqtyaFbKg5iVXoSG3ZpSgCw8omLOpNJ/GrLK8flT01esyDnorqsnQiZvZMXYEm7N8sw/Q+Gf93IbyjUnn0i/RZRMnxyY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Edp8R+bB; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Edp8R+bB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F07361F000FF; Fri, 18 Sep 2026 16:14:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789748069; bh=aHMoz1vySQvYeQW+hJXZKhFp+T//bo0AG/CTIQJNNJo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Edp8R+bBPQqImx1+AnsYjmOnuRIOuZBNv9WinTHaoT2DaiptqJx27nbkcCY8+1zLU peekFHkhOw2J1WKN44ohH3bDuRpgH1lqV8GkyKcFKG1KjapgQHnyVDf0Sslq++JjFa 2kRTowqnTeUg37ewHZQ7yuWYaGpnjk4GrQ6UN/jeec3jsd/wCXHG8NF475UmF3JIPI +NqXQs5Mow6EX4NSCPmfNjqJmyTm5paYlW2mbLzrjMxhw/HWMXejN/5sONfC8hsm9g qKS8tHj98Eh8MQxxT0DUmDbARLdqk3QEXt+tCJIfBgSM+KErRj8J243E/rwLS/pYfG tY0NDIM1gutHg== From: Will Deacon To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Will Deacon , Arnd Bergmann , Ard Biesheuvel , Ada Couprie Diaz , David Hildenbrand , Catalin Marinas , Vladimir Murzin , Mark Rutland , Mostafa Saleh , Lorenzo Stoakes , Oliver Upton , Linus Walleij , Marc Zyngier Subject: [PATCH v2 04/21] arm64: bpf: Add support for generating reads of TPIDRRO_EL0 Date: Fri, 18 Sep 2026 17:13:48 +0100 Message-ID: <20260918161407.2300-5-will@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260918161407.2300-1-will@kernel.org> References: <20260918161407.2300-1-will@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit In preparation for storing 'current' in TPIDRRO_EL0, add support for the instruction encoding of "MRS Rt, TPIDRRO_EL0" to the BPF JIT. Cc: Mark Rutland Signed-off-by: Will Deacon --- arch/arm64/include/asm/insn.h | 1 + arch/arm64/net/bpf_jit.h | 2 ++ 2 files changed, 3 insertions(+) diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h index 1ce75a442638..0e739740513d 100644 --- a/arch/arm64/include/asm/insn.h +++ b/arch/arm64/include/asm/insn.h @@ -136,6 +136,7 @@ enum aarch64_insn_special_register { }; enum aarch64_insn_system_register { + AARCH64_INSN_SYSREG_TPIDRRO_EL0 = 0x5e83, AARCH64_INSN_SYSREG_TPIDR_EL1 = 0x4684, AARCH64_INSN_SYSREG_TPIDR_EL2 = 0x6682, AARCH64_INSN_SYSREG_SP_EL0 = 0x4208, diff --git a/arch/arm64/net/bpf_jit.h b/arch/arm64/net/bpf_jit.h index b2fe6e6dcf44..df469a005373 100644 --- a/arch/arm64/net/bpf_jit.h +++ b/arch/arm64/net/bpf_jit.h @@ -331,6 +331,8 @@ aarch64_insn_gen_adr(0, offset, Rd, AARCH64_INSN_ADR_TYPE_ADR) /* MRS */ +#define A64_MRS_TPIDRRO_EL0(Rt) \ + aarch64_insn_gen_mrs(Rt, AARCH64_INSN_SYSREG_TPIDRRO_EL0) #define A64_MRS_TPIDR_EL1(Rt) \ aarch64_insn_gen_mrs(Rt, AARCH64_INSN_SYSREG_TPIDR_EL1) #define A64_MRS_TPIDR_EL2(Rt) \ -- 2.55.0.1082.g2b9226bbc0-goog