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 X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7EEE6C2BBD5 for ; Wed, 16 Dec 2020 10:09:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 47AEE2313C for ; Wed, 16 Dec 2020 10:09:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726281AbgLPKJD (ORCPT ); Wed, 16 Dec 2020 05:09:03 -0500 Received: from pegase1.c-s.fr ([93.17.236.30]:30638 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726259AbgLPKJD (ORCPT ); Wed, 16 Dec 2020 05:09:03 -0500 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 4CwrQv0qTNz9v1ZG; Wed, 16 Dec 2020 11:07:35 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id hvM-Cqhlr7xG; Wed, 16 Dec 2020 11:07:35 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 4CwrQv00BYz9v1Z7; Wed, 16 Dec 2020 11:07:35 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id B52848B7CC; Wed, 16 Dec 2020 11:07:35 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id WSKtveR0_kV4; Wed, 16 Dec 2020 11:07:35 +0100 (CET) Received: from localhost.localdomain (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 57B3E8B7C7; Wed, 16 Dec 2020 11:07:35 +0100 (CET) Received: by localhost.localdomain (Postfix, from userid 0) id 2D71A6681D; Wed, 16 Dec 2020 10:07:35 +0000 (UTC) Message-Id: In-Reply-To: References: From: Christophe Leroy Subject: [RFC PATCH v1 5/7] powerpc/bpf: Change values of SEEN_ flags To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@chromium.org, naveen.n.rao@linux.ibm.com, sandipan@linux.ibm.com Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, bpf@vger.kernel.org Date: Wed, 16 Dec 2020 10:07:35 +0000 (UTC) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Because PPC32 will use more non volatile registers, move SEEN_ flags to positions 0-2 which corresponds to special registers. Signed-off-by: Christophe Leroy --- arch/powerpc/net/bpf_jit.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/net/bpf_jit.h b/arch/powerpc/net/bpf_jit.h index b34abfce15a6..fb4656986fb9 100644 --- a/arch/powerpc/net/bpf_jit.h +++ b/arch/powerpc/net/bpf_jit.h @@ -108,18 +108,18 @@ static inline bool is_nearbranch(int offset) #define COND_LT (CR0_LT | COND_CMP_TRUE) #define COND_LE (CR0_GT | COND_CMP_FALSE) -#define SEEN_FUNC 0x1000 /* might call external helpers */ -#define SEEN_STACK 0x2000 /* uses BPF stack */ -#define SEEN_TAILCALL 0x4000 /* uses tail calls */ +#define SEEN_FUNC 0x20000000 /* might call external helpers */ +#define SEEN_STACK 0x40000000 /* uses BPF stack */ +#define SEEN_TAILCALL 0x80000000 /* uses tail calls */ struct codegen_context { /* * This is used to track register usage as well * as calls to external helpers. * - register usage is tracked with corresponding - * bits (r3-r10 and r27-r31) + * bits (r3-r31) * - rest of the bits can be used to track other - * things -- for now, we use bits 16 to 23 + * things -- for now, we use bits 0 to 2 * encoded in SEEN_* macros above */ unsigned int seen; -- 2.25.0