From 071106ecf68c401173c58808b1cf5f68cc50d390 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 05 Jan 2024 08:39:27 +0000
Subject: [PATCH] change wifi driver to cypress
---
kernel/arch/powerpc/net/bpf_jit_comp.c | 168 +++++++++++++++++++++++++++-----------------------------
1 files changed, 81 insertions(+), 87 deletions(-)
diff --git a/kernel/arch/powerpc/net/bpf_jit_comp.c b/kernel/arch/powerpc/net/bpf_jit_comp.c
index d5bfe24..e809cb5 100644
--- a/kernel/arch/powerpc/net/bpf_jit_comp.c
+++ b/kernel/arch/powerpc/net/bpf_jit_comp.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/* bpf_jit_comp.c: BPF JIT compiler
*
* Copyright 2011 Matt Evans <matt@ozlabs.org>, IBM Corporation
*
* Based on the x86 BPF compiler, by Eric Dumazet (eric.dumazet@gmail.com)
* Ported to ppc32 by Denis Kirjanov <kda@linux-powerpc.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; version 2
- * of the License.
*/
#include <linux/moduleloader.h>
#include <asm/cacheflush.h>
@@ -65,7 +61,7 @@
PPC_LWZ_OFFS(r_scratch1, r_skb, offsetof(struct sk_buff,
data_len));
PPC_LWZ_OFFS(r_HL, r_skb, offsetof(struct sk_buff, len));
- PPC_SUB(r_HL, r_HL, r_scratch1);
+ EMIT(PPC_RAW_SUB(r_HL, r_HL, r_scratch1));
PPC_LL_OFFS(r_D, r_skb, offsetof(struct sk_buff, data));
}
@@ -74,12 +70,12 @@
* TODO: Could also detect whether first instr. sets X and
* avoid this (as below, with A).
*/
- PPC_LI(r_X, 0);
+ EMIT(PPC_RAW_LI(r_X, 0));
}
/* make sure we dont leak kernel information to user */
if (bpf_needs_clear_a(&filter[0]))
- PPC_LI(r_A, 0);
+ EMIT(PPC_RAW_LI(r_A, 0));
}
static void bpf_jit_build_epilogue(u32 *image, struct codegen_context *ctx)
@@ -87,10 +83,10 @@
int i;
if (ctx->seen & (SEEN_MEM | SEEN_DATAREF)) {
- PPC_ADDI(1, 1, BPF_PPC_STACKFRAME);
+ EMIT(PPC_RAW_ADDI(1, 1, BPF_PPC_STACKFRAME));
if (ctx->seen & SEEN_DATAREF) {
PPC_BPF_LL(0, 1, PPC_LR_STKOFF);
- PPC_MTLR(0);
+ EMIT(PPC_RAW_MTLR(0));
PPC_BPF_LL(r_D, 1, -(REG_SZ*(32-r_D)));
PPC_BPF_LL(r_HL, 1, -(REG_SZ*(32-r_HL)));
}
@@ -104,7 +100,7 @@
}
/* The RETs have left a return value in R3. */
- PPC_BLR();
+ EMIT(PPC_RAW_BLR());
}
#define CHOOSE_LOAD_FUNC(K, func) \
@@ -138,124 +134,124 @@
/*** ALU ops ***/
case BPF_ALU | BPF_ADD | BPF_X: /* A += X; */
ctx->seen |= SEEN_XREG;
- PPC_ADD(r_A, r_A, r_X);
+ EMIT(PPC_RAW_ADD(r_A, r_A, r_X));
break;
case BPF_ALU | BPF_ADD | BPF_K: /* A += K; */
if (!K)
break;
- PPC_ADDI(r_A, r_A, IMM_L(K));
+ EMIT(PPC_RAW_ADDI(r_A, r_A, IMM_L(K)));
if (K >= 32768)
- PPC_ADDIS(r_A, r_A, IMM_HA(K));
+ EMIT(PPC_RAW_ADDIS(r_A, r_A, IMM_HA(K)));
break;
case BPF_ALU | BPF_SUB | BPF_X: /* A -= X; */
ctx->seen |= SEEN_XREG;
- PPC_SUB(r_A, r_A, r_X);
+ EMIT(PPC_RAW_SUB(r_A, r_A, r_X));
break;
case BPF_ALU | BPF_SUB | BPF_K: /* A -= K */
if (!K)
break;
- PPC_ADDI(r_A, r_A, IMM_L(-K));
+ EMIT(PPC_RAW_ADDI(r_A, r_A, IMM_L(-K)));
if (K >= 32768)
- PPC_ADDIS(r_A, r_A, IMM_HA(-K));
+ EMIT(PPC_RAW_ADDIS(r_A, r_A, IMM_HA(-K)));
break;
case BPF_ALU | BPF_MUL | BPF_X: /* A *= X; */
ctx->seen |= SEEN_XREG;
- PPC_MULW(r_A, r_A, r_X);
+ EMIT(PPC_RAW_MULW(r_A, r_A, r_X));
break;
case BPF_ALU | BPF_MUL | BPF_K: /* A *= K */
if (K < 32768)
- PPC_MULI(r_A, r_A, K);
+ EMIT(PPC_RAW_MULI(r_A, r_A, K));
else {
PPC_LI32(r_scratch1, K);
- PPC_MULW(r_A, r_A, r_scratch1);
+ EMIT(PPC_RAW_MULW(r_A, r_A, r_scratch1));
}
break;
case BPF_ALU | BPF_MOD | BPF_X: /* A %= X; */
case BPF_ALU | BPF_DIV | BPF_X: /* A /= X; */
ctx->seen |= SEEN_XREG;
- PPC_CMPWI(r_X, 0);
+ EMIT(PPC_RAW_CMPWI(r_X, 0));
if (ctx->pc_ret0 != -1) {
PPC_BCC(COND_EQ, addrs[ctx->pc_ret0]);
} else {
PPC_BCC_SHORT(COND_NE, (ctx->idx*4)+12);
- PPC_LI(r_ret, 0);
+ EMIT(PPC_RAW_LI(r_ret, 0));
PPC_JMP(exit_addr);
}
if (code == (BPF_ALU | BPF_MOD | BPF_X)) {
- PPC_DIVWU(r_scratch1, r_A, r_X);
- PPC_MULW(r_scratch1, r_X, r_scratch1);
- PPC_SUB(r_A, r_A, r_scratch1);
+ EMIT(PPC_RAW_DIVWU(r_scratch1, r_A, r_X));
+ EMIT(PPC_RAW_MULW(r_scratch1, r_X, r_scratch1));
+ EMIT(PPC_RAW_SUB(r_A, r_A, r_scratch1));
} else {
- PPC_DIVWU(r_A, r_A, r_X);
+ EMIT(PPC_RAW_DIVWU(r_A, r_A, r_X));
}
break;
case BPF_ALU | BPF_MOD | BPF_K: /* A %= K; */
PPC_LI32(r_scratch2, K);
- PPC_DIVWU(r_scratch1, r_A, r_scratch2);
- PPC_MULW(r_scratch1, r_scratch2, r_scratch1);
- PPC_SUB(r_A, r_A, r_scratch1);
+ EMIT(PPC_RAW_DIVWU(r_scratch1, r_A, r_scratch2));
+ EMIT(PPC_RAW_MULW(r_scratch1, r_scratch2, r_scratch1));
+ EMIT(PPC_RAW_SUB(r_A, r_A, r_scratch1));
break;
case BPF_ALU | BPF_DIV | BPF_K: /* A /= K */
if (K == 1)
break;
PPC_LI32(r_scratch1, K);
- PPC_DIVWU(r_A, r_A, r_scratch1);
+ EMIT(PPC_RAW_DIVWU(r_A, r_A, r_scratch1));
break;
case BPF_ALU | BPF_AND | BPF_X:
ctx->seen |= SEEN_XREG;
- PPC_AND(r_A, r_A, r_X);
+ EMIT(PPC_RAW_AND(r_A, r_A, r_X));
break;
case BPF_ALU | BPF_AND | BPF_K:
if (!IMM_H(K))
- PPC_ANDI(r_A, r_A, K);
+ EMIT(PPC_RAW_ANDI(r_A, r_A, K));
else {
PPC_LI32(r_scratch1, K);
- PPC_AND(r_A, r_A, r_scratch1);
+ EMIT(PPC_RAW_AND(r_A, r_A, r_scratch1));
}
break;
case BPF_ALU | BPF_OR | BPF_X:
ctx->seen |= SEEN_XREG;
- PPC_OR(r_A, r_A, r_X);
+ EMIT(PPC_RAW_OR(r_A, r_A, r_X));
break;
case BPF_ALU | BPF_OR | BPF_K:
if (IMM_L(K))
- PPC_ORI(r_A, r_A, IMM_L(K));
+ EMIT(PPC_RAW_ORI(r_A, r_A, IMM_L(K)));
if (K >= 65536)
- PPC_ORIS(r_A, r_A, IMM_H(K));
+ EMIT(PPC_RAW_ORIS(r_A, r_A, IMM_H(K)));
break;
case BPF_ANC | SKF_AD_ALU_XOR_X:
case BPF_ALU | BPF_XOR | BPF_X: /* A ^= X */
ctx->seen |= SEEN_XREG;
- PPC_XOR(r_A, r_A, r_X);
+ EMIT(PPC_RAW_XOR(r_A, r_A, r_X));
break;
case BPF_ALU | BPF_XOR | BPF_K: /* A ^= K */
if (IMM_L(K))
- PPC_XORI(r_A, r_A, IMM_L(K));
+ EMIT(PPC_RAW_XORI(r_A, r_A, IMM_L(K)));
if (K >= 65536)
- PPC_XORIS(r_A, r_A, IMM_H(K));
+ EMIT(PPC_RAW_XORIS(r_A, r_A, IMM_H(K)));
break;
case BPF_ALU | BPF_LSH | BPF_X: /* A <<= X; */
ctx->seen |= SEEN_XREG;
- PPC_SLW(r_A, r_A, r_X);
+ EMIT(PPC_RAW_SLW(r_A, r_A, r_X));
break;
case BPF_ALU | BPF_LSH | BPF_K:
if (K == 0)
break;
else
- PPC_SLWI(r_A, r_A, K);
+ EMIT(PPC_RAW_SLWI(r_A, r_A, K));
break;
case BPF_ALU | BPF_RSH | BPF_X: /* A >>= X; */
ctx->seen |= SEEN_XREG;
- PPC_SRW(r_A, r_A, r_X);
+ EMIT(PPC_RAW_SRW(r_A, r_A, r_X));
break;
case BPF_ALU | BPF_RSH | BPF_K: /* A >>= K; */
if (K == 0)
break;
else
- PPC_SRWI(r_A, r_A, K);
+ EMIT(PPC_RAW_SRWI(r_A, r_A, K));
break;
case BPF_ALU | BPF_NEG:
- PPC_NEG(r_A, r_A);
+ EMIT(PPC_RAW_NEG(r_A, r_A));
break;
case BPF_RET | BPF_K:
PPC_LI32(r_ret, K);
@@ -281,24 +277,24 @@
if (ctx->seen)
PPC_JMP(exit_addr);
else
- PPC_BLR();
+ EMIT(PPC_RAW_BLR());
}
break;
case BPF_RET | BPF_A:
- PPC_MR(r_ret, r_A);
+ EMIT(PPC_RAW_MR(r_ret, r_A));
if (i != flen - 1) {
if (ctx->seen)
PPC_JMP(exit_addr);
else
- PPC_BLR();
+ EMIT(PPC_RAW_BLR());
}
break;
case BPF_MISC | BPF_TAX: /* X = A */
- PPC_MR(r_X, r_A);
+ EMIT(PPC_RAW_MR(r_X, r_A));
break;
case BPF_MISC | BPF_TXA: /* A = X */
ctx->seen |= SEEN_XREG;
- PPC_MR(r_A, r_X);
+ EMIT(PPC_RAW_MR(r_A, r_X));
break;
/*** Constant loads/M[] access ***/
@@ -309,23 +305,23 @@
PPC_LI32(r_X, K);
break;
case BPF_LD | BPF_MEM: /* A = mem[K] */
- PPC_MR(r_A, r_M + (K & 0xf));
+ EMIT(PPC_RAW_MR(r_A, r_M + (K & 0xf)));
ctx->seen |= SEEN_MEM | (1<<(K & 0xf));
break;
case BPF_LDX | BPF_MEM: /* X = mem[K] */
- PPC_MR(r_X, r_M + (K & 0xf));
+ EMIT(PPC_RAW_MR(r_X, r_M + (K & 0xf)));
ctx->seen |= SEEN_MEM | (1<<(K & 0xf));
break;
case BPF_ST: /* mem[K] = A */
- PPC_MR(r_M + (K & 0xf), r_A);
+ EMIT(PPC_RAW_MR(r_M + (K & 0xf), r_A));
ctx->seen |= SEEN_MEM | (1<<(K & 0xf));
break;
case BPF_STX: /* mem[K] = X */
- PPC_MR(r_M + (K & 0xf), r_X);
+ EMIT(PPC_RAW_MR(r_M + (K & 0xf), r_X));
ctx->seen |= SEEN_XREG | SEEN_MEM | (1<<(K & 0xf));
break;
case BPF_LD | BPF_W | BPF_LEN: /* A = skb->len; */
- BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, len) != 4);
+ BUILD_BUG_ON(sizeof_field(struct sk_buff, len) != 4);
PPC_LWZ_OFFS(r_A, r_skb, offsetof(struct sk_buff, len));
break;
case BPF_LDX | BPF_W | BPF_ABS: /* A = *((u32 *)(seccomp_data + K)); */
@@ -337,26 +333,26 @@
/*** Ancillary info loads ***/
case BPF_ANC | SKF_AD_PROTOCOL: /* A = ntohs(skb->protocol); */
- BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff,
+ BUILD_BUG_ON(sizeof_field(struct sk_buff,
protocol) != 2);
PPC_NTOHS_OFFS(r_A, r_skb, offsetof(struct sk_buff,
protocol));
break;
case BPF_ANC | SKF_AD_IFINDEX:
case BPF_ANC | SKF_AD_HATYPE:
- BUILD_BUG_ON(FIELD_SIZEOF(struct net_device,
+ BUILD_BUG_ON(sizeof_field(struct net_device,
ifindex) != 4);
- BUILD_BUG_ON(FIELD_SIZEOF(struct net_device,
+ BUILD_BUG_ON(sizeof_field(struct net_device,
type) != 2);
PPC_LL_OFFS(r_scratch1, r_skb, offsetof(struct sk_buff,
dev));
- PPC_CMPDI(r_scratch1, 0);
+ EMIT(PPC_RAW_CMPDI(r_scratch1, 0));
if (ctx->pc_ret0 != -1) {
PPC_BCC(COND_EQ, addrs[ctx->pc_ret0]);
} else {
/* Exit, returning 0; first pass hits here. */
PPC_BCC_SHORT(COND_NE, ctx->idx * 4 + 12);
- PPC_LI(r_ret, 0);
+ EMIT(PPC_RAW_LI(r_ret, 0));
PPC_JMP(exit_addr);
}
if (code == (BPF_ANC | SKF_AD_IFINDEX)) {
@@ -369,39 +365,38 @@
break;
case BPF_ANC | SKF_AD_MARK:
- BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, mark) != 4);
+ BUILD_BUG_ON(sizeof_field(struct sk_buff, mark) != 4);
PPC_LWZ_OFFS(r_A, r_skb, offsetof(struct sk_buff,
mark));
break;
case BPF_ANC | SKF_AD_RXHASH:
- BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, hash) != 4);
+ BUILD_BUG_ON(sizeof_field(struct sk_buff, hash) != 4);
PPC_LWZ_OFFS(r_A, r_skb, offsetof(struct sk_buff,
hash));
break;
case BPF_ANC | SKF_AD_VLAN_TAG:
- case BPF_ANC | SKF_AD_VLAN_TAG_PRESENT:
- BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, vlan_tci) != 2);
- BUILD_BUG_ON(VLAN_TAG_PRESENT != 0x1000);
+ BUILD_BUG_ON(sizeof_field(struct sk_buff, vlan_tci) != 2);
PPC_LHZ_OFFS(r_A, r_skb, offsetof(struct sk_buff,
vlan_tci));
- if (code == (BPF_ANC | SKF_AD_VLAN_TAG)) {
- PPC_ANDI(r_A, r_A, ~VLAN_TAG_PRESENT);
- } else {
- PPC_ANDI(r_A, r_A, VLAN_TAG_PRESENT);
- PPC_SRWI(r_A, r_A, 12);
- }
+ break;
+ case BPF_ANC | SKF_AD_VLAN_TAG_PRESENT:
+ PPC_LBZ_OFFS(r_A, r_skb, PKT_VLAN_PRESENT_OFFSET());
+ if (PKT_VLAN_PRESENT_BIT)
+ EMIT(PPC_RAW_SRWI(r_A, r_A, PKT_VLAN_PRESENT_BIT));
+ if (PKT_VLAN_PRESENT_BIT < 7)
+ EMIT(PPC_RAW_ANDI(r_A, r_A, 1));
break;
case BPF_ANC | SKF_AD_QUEUE:
- BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff,
+ BUILD_BUG_ON(sizeof_field(struct sk_buff,
queue_mapping) != 2);
PPC_LHZ_OFFS(r_A, r_skb, offsetof(struct sk_buff,
queue_mapping));
break;
case BPF_ANC | SKF_AD_PKTTYPE:
PPC_LBZ_OFFS(r_A, r_skb, PKT_TYPE_OFFSET());
- PPC_ANDI(r_A, r_A, PKT_TYPE_MAX);
- PPC_SRWI(r_A, r_A, 5);
+ EMIT(PPC_RAW_ANDI(r_A, r_A, PKT_TYPE_MAX));
+ EMIT(PPC_RAW_SRWI(r_A, r_A, 5));
break;
case BPF_ANC | SKF_AD_CPU:
PPC_BPF_LOAD_CPU(r_A);
@@ -419,9 +414,9 @@
/* Load from [K]. */
ctx->seen |= SEEN_DATAREF;
PPC_FUNC_ADDR(r_scratch1, func);
- PPC_MTLR(r_scratch1);
+ EMIT(PPC_RAW_MTLR(r_scratch1));
PPC_LI32(r_addr, K);
- PPC_BLRL();
+ EMIT(PPC_RAW_BLRL());
/*
* Helper returns 'lt' condition on error, and an
* appropriate return value in r3
@@ -445,11 +440,11 @@
*/
ctx->seen |= SEEN_DATAREF | SEEN_XREG;
PPC_FUNC_ADDR(r_scratch1, func);
- PPC_MTLR(r_scratch1);
- PPC_ADDI(r_addr, r_X, IMM_L(K));
+ EMIT(PPC_RAW_MTLR(r_scratch1));
+ EMIT(PPC_RAW_ADDI(r_addr, r_X, IMM_L(K)));
if (K >= 32768)
- PPC_ADDIS(r_addr, r_addr, IMM_HA(K));
- PPC_BLRL();
+ EMIT(PPC_RAW_ADDIS(r_addr, r_addr, IMM_HA(K)));
+ EMIT(PPC_RAW_BLRL());
/* If error, cr0.LT set */
PPC_BCC(COND_LT, exit_addr);
break;
@@ -480,7 +475,6 @@
case BPF_JMP | BPF_JSET | BPF_K:
case BPF_JMP | BPF_JSET | BPF_X:
true_cond = COND_NE;
- /* Fall through */
cond_branch:
/* same targets, can avoid doing the test :) */
if (filter[i].jt == filter[i].jf) {
@@ -494,30 +488,30 @@
case BPF_JMP | BPF_JGE | BPF_X:
case BPF_JMP | BPF_JEQ | BPF_X:
ctx->seen |= SEEN_XREG;
- PPC_CMPLW(r_A, r_X);
+ EMIT(PPC_RAW_CMPLW(r_A, r_X));
break;
case BPF_JMP | BPF_JSET | BPF_X:
ctx->seen |= SEEN_XREG;
- PPC_AND_DOT(r_scratch1, r_A, r_X);
+ EMIT(PPC_RAW_AND_DOT(r_scratch1, r_A, r_X));
break;
case BPF_JMP | BPF_JEQ | BPF_K:
case BPF_JMP | BPF_JGT | BPF_K:
case BPF_JMP | BPF_JGE | BPF_K:
if (K < 32768)
- PPC_CMPLWI(r_A, K);
+ EMIT(PPC_RAW_CMPLWI(r_A, K));
else {
PPC_LI32(r_scratch1, K);
- PPC_CMPLW(r_A, r_scratch1);
+ EMIT(PPC_RAW_CMPLW(r_A, r_scratch1));
}
break;
case BPF_JMP | BPF_JSET | BPF_K:
if (K < 32768)
/* PPC_ANDI is /only/ dot-form */
- PPC_ANDI(r_scratch1, r_A, K);
+ EMIT(PPC_RAW_ANDI(r_scratch1, r_A, K));
else {
PPC_LI32(r_scratch1, K);
- PPC_AND_DOT(r_scratch1, r_A,
- r_scratch1);
+ EMIT(PPC_RAW_AND_DOT(r_scratch1, r_A,
+ r_scratch1));
}
break;
}
--
Gitblit v1.6.2