From: Denis Kirjanov <kda@linux-powerpc.org>
Date: Tue, 17 Feb 2015 07:04:42 +0000 (+0300)
Subject: ppc: bpf: Add SKF_AD_CPU for ppc32
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=022909482d1c97c0b70438f2727a4f286ef0d289;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

ppc: bpf: Add SKF_AD_CPU for ppc32

Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/arch/powerpc/net/bpf_jit.h b/arch/powerpc/net/bpf_jit.h
index 2d5e71577210..889fd199a821 100644
--- a/arch/powerpc/net/bpf_jit.h
+++ b/arch/powerpc/net/bpf_jit.h
@@ -154,6 +154,23 @@ DECLARE_LOAD_FUNC(sk_load_byte_msh);
 #define PPC_LL_OFFS(r, base, i) do { PPC_LWZ_OFFS(r, base, i); } while(0)
 #endif
 
+#ifdef CONFIG_SMP
+#ifdef CONFIG_PPC64
+#define PPC_BPF_LOAD_CPU(r)		\
+	do { BUILD_BUG_ON(FIELD_SIZEOF(struct paca_struct, paca_index) != 2);	\
+		PPC_LHZ_OFFS(r, 13, offsetof(struct paca_struct, paca_index));		\
+	} while (0)
+#else
+#define PPC_BPF_LOAD_CPU(r)     \
+	do { BUILD_BUG_ON(FIELD_SIZEOF(struct thread_info, cpu) != 4);			\
+		PPC_LHZ_OFFS(r, (1 & ~(THREAD_SIZE - 1)),							\
+				offsetof(struct thread_info, cpu));							\
+	} while(0)
+#endif
+#else
+#define PPC_BPF_LOAD_CPU(r) do { PPC_LI(r, 0); } while(0)
+#endif
+
 #define PPC_CMPWI(a, i)		EMIT(PPC_INST_CMPWI | ___PPC_RA(a) | IMM_L(i))
 #define PPC_CMPDI(a, i)		EMIT(PPC_INST_CMPDI | ___PPC_RA(a) | IMM_L(i))
 #define PPC_CMPLWI(a, i)	EMIT(PPC_INST_CMPLWI | ___PPC_RA(a) | IMM_L(i))
diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c
index 8b2926850125..17cea18a09d3 100644
--- a/arch/powerpc/net/bpf_jit_comp.c
+++ b/arch/powerpc/net/bpf_jit_comp.c
@@ -411,20 +411,8 @@ static int bpf_jit_build_body(struct bpf_prog *fp, u32 *image,
 			PPC_SRWI(r_A, r_A, 5);
 			break;
 		case BPF_ANC | SKF_AD_CPU:
-#ifdef CONFIG_SMP
-			/*
-			 * PACA ptr is r13:
-			 * raw_smp_processor_id() = local_paca->paca_index
-			 */
-			BUILD_BUG_ON(FIELD_SIZEOF(struct paca_struct,
-						  paca_index) != 2);
-			PPC_LHZ_OFFS(r_A, 13,
-				     offsetof(struct paca_struct, paca_index));
-#else
-			PPC_LI(r_A, 0);
-#endif
+			PPC_BPF_LOAD_CPU(r_A);
 			break;
-
 			/*** Absolute loads from packet header/data ***/
 		case BPF_LD | BPF_W | BPF_ABS:
 			func = CHOOSE_LOAD_FUNC(K, sk_load_word);