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 84A4E3B9DAE; Thu, 16 Jul 2026 07:52:12 +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=1784188344; cv=none; b=cqZigA++LP3wkpGdHCwwjbnhZ4msQ4ZSpiITjanh8PgbXtDnHp7tdKoIG891ORiwv4A3pyZd4vCFyac4Xj3bFhd3HE+LAPUq2mBH/t+SuvI6PWDLoTYLysINqMVxqXJ3eg4CqENEbLQMZ4Nuld4u0NxgvLOanP4kzEI2Mc4rhZM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784188344; c=relaxed/simple; bh=0ezK9nb6wN4qDm7eVfl3gFFuWiuh/XD1Fu96JdsDZY4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=sjKiaCTKEDxKOiT829sOUpfnDcPoFo5me/wSsJPsrnVRHs7QLyvbv6Qrfps26U98k1GUyEK2Lz8JIyZuOeeiI/hJ8fiynBDpj2168x4WdUHEnY+I1V/HVL3zEbzbTKURGe98IsLosJ6Xg1xFoL001IMqyECPl6/l0eg1UBWCfFI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FLqo7RJt; 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="FLqo7RJt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A42F81F000E9; Thu, 16 Jul 2026 07:52:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784188331; bh=bsCkJeKP215VVn4x62ogxT2jAVvGPVAbWkkJgMSjygg=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=FLqo7RJtwC07gO35hWIR42JynRXwkaCrCzlN46P8eQEPNFxltJM2mrr1Pb63xqMFT ytcILU7+Yprwnf045Mo/px5ocK+HMSav8TpxQ+lNpOWSH5zCW3le8Da6YaLV34/vVx vDBPSRoJWWJ4JEpJEigG08SphOPRB0AsCPzxmGnDMMlZqwYd63C+WkQ1UAdKziHwZm QpsDvaIKo9BmRR//qVs6G7hiAqNZ5OoRFlGm3r4pkACKPbaPDWFKGSGb8uXGHc0Eb9 47DgLmaEJFzHyBmZR+wcCvLoDC6NouCT7l0oP92cAQK9daeAqUC/5NggniwJXCFKrF 6GWWJcoQZLUUw== From: "Mike Rapoport (Microsoft)" Date: Thu, 16 Jul 2026 10:51:39 +0300 Subject: [PATCH bpf-next v3 5/5] x86/bpf: enable EXECMEM_ROX_CACHE for BPF allocations Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260716-execmem-x86-rox-bpf-v0-v3-5-4e76158c01c5@kernel.org> References: <20260716-execmem-x86-rox-bpf-v0-v3-0-4e76158c01c5@kernel.org> In-Reply-To: <20260716-execmem-x86-rox-bpf-v0-v3-0-4e76158c01c5@kernel.org> To: Alexei Starovoitov , Andrii Nakryiko , Andy Lutomirski , Borislav Petkov , Daniel Borkmann , Dave Hansen , Eduard Zingerman , Ingo Molnar , Kumar Kartikeya Dwivedi , Peter Zijlstra , Song Liu , Thomas Gleixner Cc: Emil Tsalapatis , Jiri Olsa , John Fastabend , Martin KaFai Lau , Mike Rapoport , "H. Peter Anvin" , Yonghong Song , bpf@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org X-Mailer: b4 0.16-dev BPF core and x86 JIT use text poking and temporary writable buffers and thus can handle ROX memory. Enable ROX cache for EXECMEM_BPF when configuration and CPU features allow that. Signed-off-by: Mike Rapoport (Microsoft) --- arch/x86/mm/init.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index fb67217fddcd..079f8c7e9e3c 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -1107,10 +1107,10 @@ struct execmem_info __init *execmem_arch_setup(void) .alignment = MODULE_ALIGN, }, [EXECMEM_BPF] = { - .flags = EXECMEM_KASAN_SHADOW, + .flags = flags, .start = start, .end = MODULES_END, - .pgprot = PAGE_KERNEL, + .pgprot = pgprot, .alignment = MODULE_ALIGN, }, [EXECMEM_MODULE_DATA] = { -- 2.53.0