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[23.128.96.18]) by mx.google.com with ESMTP id o13si12484019edi.135.2021.03.22.09.40.34; Mon, 22 Mar 2021 09:40:56 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232052AbhCVQiT (ORCPT + 99 others); Mon, 22 Mar 2021 12:38:19 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:24880 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229547AbhCVQhw (ORCPT ); Mon, 22 Mar 2021 12:37:52 -0400 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 4F40Xn37YXz9txkS; Mon, 22 Mar 2021 17:37:45 +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 jd0ggnH-0fRy; Mon, 22 Mar 2021 17:37:45 +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 4F40Xn2GR1z9txkL; Mon, 22 Mar 2021 17:37:45 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 005AC8B7A3; Mon, 22 Mar 2021 17:37:50 +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 BbAqe78Pxeh8; Mon, 22 Mar 2021 17:37:50 +0100 (CET) Received: from po16121vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id B678F8B79C; Mon, 22 Mar 2021 17:37:50 +0100 (CET) Received: by po16121vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 9946B675F4; Mon, 22 Mar 2021 16:37:50 +0000 (UTC) Message-Id: <608faa1dc3ecfead649e15392abd07b00313d2ba.1616430991.git.christophe.leroy@csgroup.eu> In-Reply-To: References: From: Christophe Leroy Subject: [PATCH v2 5/8] 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: Mon, 22 Mar 2021 16:37:50 +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