From patchwork Mon Jan 21 13:15:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiong Wang X-Patchwork-Id: 1028653 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=netronome.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=netronome-com.20150623.gappssmtp.com header.i=@netronome-com.20150623.gappssmtp.com header.b="GBfeSp/i"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 43jsWq4nnsz9s7h for ; Tue, 22 Jan 2019 00:16:39 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728801AbfAUNQi (ORCPT ); Mon, 21 Jan 2019 08:16:38 -0500 Received: from mail-wm1-f67.google.com ([209.85.128.67]:38904 "EHLO mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728864AbfAUNQX (ORCPT ); Mon, 21 Jan 2019 08:16:23 -0500 Received: by mail-wm1-f67.google.com with SMTP id m22so10776272wml.3 for ; Mon, 21 Jan 2019 05:16:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=netronome-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=2wll7CU4f7VG27NvzHJdk0tUAsGubCwIpMu7DVQxtL4=; b=GBfeSp/iTp/aSSsBVYzcdLkDarqd2r95JAln/Fz8a09OAMNTgPS/E9O70HHxQyV2oN g+slbrwZR0hSjqMyK04+ik1/cRTbfYJA9fxYntXq1tratfYsMptnTm+U5wTPCFUqPaVa mxdqcI4sHv8/d2yuw6RuaZSAp60U3OUV72UARp9C2+AyE6o/sUSeziXvAH2t8U84GZiN cUq4nHxWluxfmIcWkmV0wuKfgKdjh36wGPzzTtCnJHVUyrSk01jC17IEx4r/zv7eLOpV JG5bszR6u58aKZC/ia2+LnqD1mrXdIuUAhxzudTmT9qxeRYhFpIpcLB8yBQmKy7DvDUW I1Ww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=2wll7CU4f7VG27NvzHJdk0tUAsGubCwIpMu7DVQxtL4=; b=oKKoXNXtSrSAdpCnKwffYrx+Wx7Sb6wEXWwNex6z+iCLIxsq5gckHESCQP398FYnyY g1paTYJ3EY05wYapDA7/dG27peRNpbBApK965/SOQSMxMsdevN4RyUbdFGeUaNB2jzjq 9XUIjhKAU6oMmuHD9BweLuW5vkv9J59CHl8pv/4jWCkj0rKiR9lSwWMijVuLj3AgjOup e6Bh+XcAt4tqTEGdSliuM1lddveGxSnVccmt/eVS9be0bnB88+th0KyQeurEkVhY7Mjq 9kRYL5DvyMut0NXl8BT13QaEKjXufnxU0tWSqACpswI/fG32YrF/GwQ6FOI1HqztTrrN tTEg== X-Gm-Message-State: AJcUukcYnUYN3pkA+yINJpwsuCI8rWUB7L75RlXB0krDV/wZp8cnRpeo lBVmLvn2vqxGYqBUhwPQzr57JQ== X-Google-Smtp-Source: ALg8bN738z6nDbi29HyfnUYGEqTOyvavyrGF4liJODaXzIfxPgvu8CEf5PamUp9dtoaCDFtEvG2QgQ== X-Received: by 2002:a1c:c64e:: with SMTP id w75mr26140744wmf.46.1548076580909; Mon, 21 Jan 2019 05:16:20 -0800 (PST) Received: from cbtest28.netronome.com ([217.38.71.146]) by smtp.gmail.com with ESMTPSA id a12sm100591936wro.18.2019.01.21.05.16.19 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 21 Jan 2019 05:16:19 -0800 (PST) From: Jiong Wang To: ast@kernel.org, daniel@iogearbox.net Cc: netdev@vger.kernel.org, oss-drivers@netronome.com, Jiong Wang , Wang YanQing Subject: [PATCH bpf-next v2 10/16] x32: bpf: implement jitting of JMP32 Date: Mon, 21 Jan 2019 08:15:47 -0500 Message-Id: <1548076553-31268-11-git-send-email-jiong.wang@netronome.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1548076553-31268-1-git-send-email-jiong.wang@netronome.com> References: <1548076553-31268-1-git-send-email-jiong.wang@netronome.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch implements code-gen for new JMP32 instructions on x32. Also fixed several reverse xmas tree coding style issues as I am there. Cc: Wang YanQing Signed-off-by: Jiong Wang --- arch/x86/net/bpf_jit_comp32.c | 121 +++++++++++++++++++++++++++++------------- 1 file changed, 85 insertions(+), 36 deletions(-) diff --git a/arch/x86/net/bpf_jit_comp32.c b/arch/x86/net/bpf_jit_comp32.c index 8f6cc71..0d9cdff 100644 --- a/arch/x86/net/bpf_jit_comp32.c +++ b/arch/x86/net/bpf_jit_comp32.c @@ -2072,7 +2072,18 @@ static int do_jit(struct bpf_prog *bpf_prog, int *addrs, u8 *image, case BPF_JMP | BPF_JSGT | BPF_X: case BPF_JMP | BPF_JSLE | BPF_X: case BPF_JMP | BPF_JSLT | BPF_X: - case BPF_JMP | BPF_JSGE | BPF_X: { + case BPF_JMP | BPF_JSGE | BPF_X: + case BPF_JMP32 | BPF_JEQ | BPF_X: + case BPF_JMP32 | BPF_JNE | BPF_X: + case BPF_JMP32 | BPF_JGT | BPF_X: + case BPF_JMP32 | BPF_JLT | BPF_X: + case BPF_JMP32 | BPF_JGE | BPF_X: + case BPF_JMP32 | BPF_JLE | BPF_X: + case BPF_JMP32 | BPF_JSGT | BPF_X: + case BPF_JMP32 | BPF_JSLE | BPF_X: + case BPF_JMP32 | BPF_JSLT | BPF_X: + case BPF_JMP32 | BPF_JSGE | BPF_X: { + bool is_jmp64 = BPF_CLASS(insn->code) == BPF_JMP; u8 dreg_lo = dstk ? IA32_EAX : dst_lo; u8 dreg_hi = dstk ? IA32_EDX : dst_hi; u8 sreg_lo = sstk ? IA32_ECX : src_lo; @@ -2081,25 +2092,35 @@ static int do_jit(struct bpf_prog *bpf_prog, int *addrs, u8 *image, if (dstk) { EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), STACK_VAR(dst_lo)); - EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EDX), - STACK_VAR(dst_hi)); + if (is_jmp64) + EMIT3(0x8B, + add_2reg(0x40, IA32_EBP, + IA32_EDX), + STACK_VAR(dst_hi)); } if (sstk) { EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_ECX), STACK_VAR(src_lo)); - EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EBX), - STACK_VAR(src_hi)); + if (is_jmp64) + EMIT3(0x8B, + add_2reg(0x40, IA32_EBP, + IA32_EBX), + STACK_VAR(src_hi)); } - /* cmp dreg_hi,sreg_hi */ - EMIT2(0x39, add_2reg(0xC0, dreg_hi, sreg_hi)); - EMIT2(IA32_JNE, 2); + if (is_jmp64) { + /* cmp dreg_hi,sreg_hi */ + EMIT2(0x39, add_2reg(0xC0, dreg_hi, sreg_hi)); + EMIT2(IA32_JNE, 2); + } /* cmp dreg_lo,sreg_lo */ EMIT2(0x39, add_2reg(0xC0, dreg_lo, sreg_lo)); goto emit_cond_jmp; } - case BPF_JMP | BPF_JSET | BPF_X: { + case BPF_JMP | BPF_JSET | BPF_X: + case BPF_JMP32 | BPF_JSET | BPF_X: { + bool is_jmp64 = BPF_CLASS(insn->code) == BPF_JMP; u8 dreg_lo = dstk ? IA32_EAX : dst_lo; u8 dreg_hi = dstk ? IA32_EDX : dst_hi; u8 sreg_lo = sstk ? IA32_ECX : src_lo; @@ -2108,15 +2129,21 @@ static int do_jit(struct bpf_prog *bpf_prog, int *addrs, u8 *image, if (dstk) { EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), STACK_VAR(dst_lo)); - EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EDX), - STACK_VAR(dst_hi)); + if (is_jmp64) + EMIT3(0x8B, + add_2reg(0x40, IA32_EBP, + IA32_EDX), + STACK_VAR(dst_hi)); } if (sstk) { EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_ECX), STACK_VAR(src_lo)); - EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EBX), - STACK_VAR(src_hi)); + if (is_jmp64) + EMIT3(0x8B, + add_2reg(0x40, IA32_EBP, + IA32_EBX), + STACK_VAR(src_hi)); } /* and dreg_lo,sreg_lo */ EMIT2(0x23, add_2reg(0xC0, sreg_lo, dreg_lo)); @@ -2126,32 +2153,39 @@ static int do_jit(struct bpf_prog *bpf_prog, int *addrs, u8 *image, EMIT2(0x09, add_2reg(0xC0, dreg_lo, dreg_hi)); goto emit_cond_jmp; } - case BPF_JMP | BPF_JSET | BPF_K: { - u32 hi; + case BPF_JMP | BPF_JSET | BPF_K: + case BPF_JMP32 | BPF_JSET | BPF_K: { + bool is_jmp64 = BPF_CLASS(insn->code) == BPF_JMP; u8 dreg_lo = dstk ? IA32_EAX : dst_lo; u8 dreg_hi = dstk ? IA32_EDX : dst_hi; u8 sreg_lo = IA32_ECX; u8 sreg_hi = IA32_EBX; + u32 hi; if (dstk) { EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), STACK_VAR(dst_lo)); - EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EDX), - STACK_VAR(dst_hi)); + if (is_jmp64) + EMIT3(0x8B, + add_2reg(0x40, IA32_EBP, + IA32_EDX), + STACK_VAR(dst_hi)); } - hi = imm32 & (1<<31) ? (u32)~0 : 0; /* mov ecx,imm32 */ - EMIT2_off32(0xC7, add_1reg(0xC0, IA32_ECX), imm32); - /* mov ebx,imm32 */ - EMIT2_off32(0xC7, add_1reg(0xC0, IA32_EBX), hi); + EMIT2_off32(0xC7, add_1reg(0xC0, sreg_lo), imm32); /* and dreg_lo,sreg_lo */ EMIT2(0x23, add_2reg(0xC0, sreg_lo, dreg_lo)); - /* and dreg_hi,sreg_hi */ - EMIT2(0x23, add_2reg(0xC0, sreg_hi, dreg_hi)); - /* or dreg_lo,dreg_hi */ - EMIT2(0x09, add_2reg(0xC0, dreg_lo, dreg_hi)); + if (is_jmp64) { + hi = imm32 & (1 << 31) ? (u32)~0 : 0; + /* mov ebx,imm32 */ + EMIT2_off32(0xC7, add_1reg(0xC0, sreg_hi), hi); + /* and dreg_hi,sreg_hi */ + EMIT2(0x23, add_2reg(0xC0, sreg_hi, dreg_hi)); + /* or dreg_lo,dreg_hi */ + EMIT2(0x09, add_2reg(0xC0, dreg_lo, dreg_hi)); + } goto emit_cond_jmp; } case BPF_JMP | BPF_JEQ | BPF_K: @@ -2163,29 +2197,44 @@ static int do_jit(struct bpf_prog *bpf_prog, int *addrs, u8 *image, case BPF_JMP | BPF_JSGT | BPF_K: case BPF_JMP | BPF_JSLE | BPF_K: case BPF_JMP | BPF_JSLT | BPF_K: - case BPF_JMP | BPF_JSGE | BPF_K: { - u32 hi; + case BPF_JMP | BPF_JSGE | BPF_K: + case BPF_JMP32 | BPF_JEQ | BPF_K: + case BPF_JMP32 | BPF_JNE | BPF_K: + case BPF_JMP32 | BPF_JGT | BPF_K: + case BPF_JMP32 | BPF_JLT | BPF_K: + case BPF_JMP32 | BPF_JGE | BPF_K: + case BPF_JMP32 | BPF_JLE | BPF_K: + case BPF_JMP32 | BPF_JSGT | BPF_K: + case BPF_JMP32 | BPF_JSLE | BPF_K: + case BPF_JMP32 | BPF_JSLT | BPF_K: + case BPF_JMP32 | BPF_JSGE | BPF_K: { + bool is_jmp64 = BPF_CLASS(insn->code) == BPF_JMP; u8 dreg_lo = dstk ? IA32_EAX : dst_lo; u8 dreg_hi = dstk ? IA32_EDX : dst_hi; u8 sreg_lo = IA32_ECX; u8 sreg_hi = IA32_EBX; + u32 hi; if (dstk) { EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EAX), STACK_VAR(dst_lo)); - EMIT3(0x8B, add_2reg(0x40, IA32_EBP, IA32_EDX), - STACK_VAR(dst_hi)); + if (is_jmp64) + EMIT3(0x8B, + add_2reg(0x40, IA32_EBP, + IA32_EDX), + STACK_VAR(dst_hi)); } - hi = imm32 & (1<<31) ? (u32)~0 : 0; /* mov ecx,imm32 */ EMIT2_off32(0xC7, add_1reg(0xC0, IA32_ECX), imm32); - /* mov ebx,imm32 */ - EMIT2_off32(0xC7, add_1reg(0xC0, IA32_EBX), hi); - - /* cmp dreg_hi,sreg_hi */ - EMIT2(0x39, add_2reg(0xC0, dreg_hi, sreg_hi)); - EMIT2(IA32_JNE, 2); + if (is_jmp64) { + hi = imm32 & (1 << 31) ? (u32)~0 : 0; + /* mov ebx,imm32 */ + EMIT2_off32(0xC7, add_1reg(0xC0, IA32_EBX), hi); + /* cmp dreg_hi,sreg_hi */ + EMIT2(0x39, add_2reg(0xC0, dreg_hi, sreg_hi)); + EMIT2(IA32_JNE, 2); + } /* cmp dreg_lo,sreg_lo */ EMIT2(0x39, add_2reg(0xC0, dreg_lo, sreg_lo));