From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D1AA1EB64DC for ; Mon, 19 Jun 2023 10:01:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=iskK4stP5wXwe3pZ9W+U2ezr1hvtFwcNoXjRO+1Ww1g=; b=KhwAKdqqN0fc99 d9xQeyCsuq1/bpsE+jB9o4ueL//pdMZJt0sBACM/1S+NGWWzLaY5If5l4qV7jCJOzNFKOoHSNKcT5 9rGymiuzG+F+H4hBdAdXRr8RFQStzyrnb59XWfPYiReSEms5s08SEAXk4lUY44JyQEHfE8GXiySk2 KA8Y3lZ8vX0owmbj43PDDvtXgU+bk9eh/7iXs6R2O5BgLbUMBR2KpARlLOQD/g9wN4jZORIaTQ3En Sv/aI2Oz6c9EdW0LxjCbXhH/B+JNG7dIqSONtCzBvDjiLEKenEJQqMCVbA/qNAnmI7johR4yXr48w yCVzqvRGgVf9SbgnBiiQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qBBhW-00877u-27; Mon, 19 Jun 2023 10:01:34 +0000 Received: from mail-wr1-x431.google.com ([2a00:1450:4864:20::431]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qBBhN-00873v-0o for linux-arm-kernel@lists.infradead.org; Mon, 19 Jun 2023 10:01:27 +0000 Received: by mail-wr1-x431.google.com with SMTP id ffacd0b85a97d-30e3caa6aa7so3231697f8f.1 for ; Mon, 19 Jun 2023 03:01:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1687168883; x=1689760883; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=9REFMTd6lRNNEelcN/tfneZyz71MzFoj98cDgvpdoUg=; b=AvcEfz2bWWnx1FsfFiWeo2EpAqHkH84mshYwS3CEbdpCXr4jftHxlJvyV6U1exEWRE J5/4OtQ8KKd7TjbUbPJ4sgx1zo/h4kehvWGpG8QS5Co50CYV7J7veWOqGCATmuyRrnzG dW86jOmF+JwCtJ8+gNmpjkPQRTUDgn8G8Ig/BZ+5YQ2sf1uZx1jjNOHGPwRTo3z4fnqa GD8i9z3ZInjdR1ujlg+W8OOCFQH15xccSku8jIAg2zPc6WhVciHVB1mn9S88c3fcSEyS RYDGMyYNrqhqDH1zHvWpaL2uRXrxpFpgHPFgBVmWyXsADXWgnhF9XpH3GnU1i43jitHk jQVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687168883; x=1689760883; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=9REFMTd6lRNNEelcN/tfneZyz71MzFoj98cDgvpdoUg=; b=EEahG5d1qOJtBHz2RDeD+oWGjgN2ooVwvkJcPbWGY66CDLm8og51ZUJRkEF2163O8m cD/klP0RumS4NMb+24LX7upMD9SxkJqb5jskAQMAnZTGYV46oeuiAzx5iocrFU2L0qhp ko467xUTHhGHV0TMBFn0QgJgKGyDbZ4sCcEBZujy9wZJWwzaxVWzB1VuR8GBuE9yxnS7 tcQbvJwF2NU3tPRb2JWCy996bylxoTiOrAx/adVNLsXaQgZg24ql0DbB/iXbCirc62KJ yva+F6MggBTFs3QikPn3i4Ha0PqoxzZPvTV62Rczqiq0Nej3CzCwQ+Jokpjzja+rqiCz wTXg== X-Gm-Message-State: AC+VfDy6Fwlj/3Q9Zqcn/BbtcYaOwQ5qZy7enqAE+KqXgud6Sic1cHZw TYMQZcwN987TZBMBegVlb6U= X-Google-Smtp-Source: ACHHUZ5d+P77ReekMD4/QzGWh2U7zpoBrdO8ZxiseRWdurChvXg92s1jN/Q/VRIolLOER/63E5xy+w== X-Received: by 2002:a5d:468d:0:b0:30a:f2a0:64fa with SMTP id u13-20020a5d468d000000b0030af2a064famr8242914wrq.10.1687168882983; Mon, 19 Jun 2023 03:01:22 -0700 (PDT) Received: from ip-172-31-22-112.eu-west-1.compute.internal (ec2-54-154-23-32.eu-west-1.compute.amazonaws.com. [54.154.23.32]) by smtp.gmail.com with ESMTPSA id a4-20020a056000050400b0030ae3a6be4asm31352451wrf.72.2023.06.19.03.01.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Jun 2023 03:01:22 -0700 (PDT) From: Puranjay Mohan To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, song@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com, bpf@vger.kernel.org, kpsingh@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: puranjay12@gmail.com Subject: [PATCH bpf-next v3 1/3] bpf: make bpf_prog_pack allocator portable Date: Mon, 19 Jun 2023 10:01:19 +0000 Message-Id: <20230619100121.27534-2-puranjay12@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230619100121.27534-1-puranjay12@gmail.com> References: <20230619100121.27534-1-puranjay12@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230619_030125_309570_10A8E077 X-CRM114-Status: GOOD ( 14.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The bpf_prog_pack allocator currently uses module_alloc() and module_memfree() to allocate and free memory. This is not portable because different architectures use different methods for allocating memory for BPF programs. Like ARM64 uses vmalloc()/vfree(). Use bpf_jit_alloc_exec() and bpf_jit_free_exec() for memory management in bpf_prog_pack allocator. Other architectures can override these with their implementation and will be able to use bpf_prog_pack directly. Signed-off-by: Puranjay Mohan Acked-by: Song Liu --- Changes in V2 => V3: - No changes Changes in v1 => v2: - No code changes. - Added Acked-by: Song Liu kernel/bpf/core.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index dc85240a0134..599136cb5096 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -860,7 +860,7 @@ static struct bpf_prog_pack *alloc_new_pack(bpf_jit_fill_hole_t bpf_fill_ill_ins GFP_KERNEL); if (!pack) return NULL; - pack->ptr = module_alloc(BPF_PROG_PACK_SIZE); + pack->ptr = bpf_jit_alloc_exec(BPF_PROG_PACK_SIZE); if (!pack->ptr) { kfree(pack); return NULL; @@ -884,7 +884,7 @@ void *bpf_prog_pack_alloc(u32 size, bpf_jit_fill_hole_t bpf_fill_ill_insns) mutex_lock(&pack_mutex); if (size > BPF_PROG_PACK_SIZE) { size = round_up(size, PAGE_SIZE); - ptr = module_alloc(size); + ptr = bpf_jit_alloc_exec(size); if (ptr) { bpf_fill_ill_insns(ptr, size); set_vm_flush_reset_perms(ptr); @@ -922,7 +922,7 @@ void bpf_prog_pack_free(struct bpf_binary_header *hdr) mutex_lock(&pack_mutex); if (hdr->size > BPF_PROG_PACK_SIZE) { - module_memfree(hdr); + bpf_jit_free_exec(hdr); goto out; } @@ -946,7 +946,7 @@ void bpf_prog_pack_free(struct bpf_binary_header *hdr) if (bitmap_find_next_zero_area(pack->bitmap, BPF_PROG_CHUNK_COUNT, 0, BPF_PROG_CHUNK_COUNT, 0) == 0) { list_del(&pack->list); - module_memfree(pack->ptr); + bpf_jit_free_exec(pack->ptr); kfree(pack); } out: -- 2.40.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel