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powerpc/bpf: Use _Rn macros for GPRs

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Use _Rn macros to specify register names to make their usage clear.

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/7df626b8cdc6141d4295ac16137c82ad570b6637.1644834730.git.naveen.n.rao@linux.vnet.ibm.com
This commit is contained in:
Naveen N. Rao 2022-02-14 16:11:49 +05:30 committed by Michael Ellerman
parent 576a6c3a00
commit 036d559c0b
2 changed files with 49 additions and 49 deletions

30
arch/powerpc/net/bpf_jit_comp32.c
View File

@ -41,23 +41,23 @@
/* BPF to ppc register mappings */
const int b2p[MAX_BPF_JIT_REG + 1] = {
/* function return value */
[BPF_REG_0] = 12,
[BPF_REG_0] = _R12,
/* function arguments */
[BPF_REG_1] = 4,
[BPF_REG_2] = 6,
[BPF_REG_3] = 8,
[BPF_REG_4] = 10,
[BPF_REG_5] = 22,
[BPF_REG_1] = _R4,
[BPF_REG_2] = _R6,
[BPF_REG_3] = _R8,
[BPF_REG_4] = _R10,
[BPF_REG_5] = _R22,
/* non volatile registers */
[BPF_REG_6] = 24,
[BPF_REG_7] = 26,
[BPF_REG_8] = 28,
[BPF_REG_9] = 30,
[BPF_REG_6] = _R24,
[BPF_REG_7] = _R26,
[BPF_REG_8] = _R28,
[BPF_REG_9] = _R30,
/* frame pointer aka BPF_REG_10 */
[BPF_REG_FP] = 18,
[BPF_REG_FP] = _R18,
/* eBPF jit internal registers */
[BPF_REG_AX] = 20,
[TMP_REG] = 31, /* 32 bits */
[BPF_REG_AX] = _R20,
[TMP_REG] = _R31, /* 32 bits */
};
static int bpf_to_ppc(struct codegen_context *ctx, int reg)
@ -66,8 +66,8 @@ static int bpf_to_ppc(struct codegen_context *ctx, int reg)
}
/* PPC NVR range -- update this if we ever use NVRs below r17 */
#define BPF_PPC_NVR_MIN 17
#define BPF_PPC_TC 16
#define BPF_PPC_NVR_MIN _R17
#define BPF_PPC_TC _R16
static int bpf_jit_stack_offsetof(struct codegen_context *ctx, int reg)
{

68
arch/powerpc/net/bpf_jit_comp64.c
View File

@ -48,28 +48,28 @@
/* BPF to ppc register mappings */
const int b2p[MAX_BPF_JIT_REG + 2] = {
/* function return value */
[BPF_REG_0] = 8,
[BPF_REG_0] = _R8,
/* function arguments */
[BPF_REG_1] = 3,
[BPF_REG_2] = 4,
[BPF_REG_3] = 5,
[BPF_REG_4] = 6,
[BPF_REG_5] = 7,
[BPF_REG_1] = _R3,
[BPF_REG_2] = _R4,
[BPF_REG_3] = _R5,
[BPF_REG_4] = _R6,
[BPF_REG_5] = _R7,
/* non volatile registers */
[BPF_REG_6] = 27,
[BPF_REG_7] = 28,
[BPF_REG_8] = 29,
[BPF_REG_9] = 30,
[BPF_REG_6] = _R27,
[BPF_REG_7] = _R28,
[BPF_REG_8] = _R29,
[BPF_REG_9] = _R30,
/* frame pointer aka BPF_REG_10 */
[BPF_REG_FP] = 31,
[BPF_REG_FP] = _R31,
/* eBPF jit internal registers */
[BPF_REG_AX] = 12,
[TMP_REG_1] = 9,
[TMP_REG_2] = 10
[BPF_REG_AX] = _R12,
[TMP_REG_1] = _R9,
[TMP_REG_2] = _R10
};
/* PPC NVR range -- update this if we ever use NVRs below r27 */
#define BPF_PPC_NVR_MIN 27
#define BPF_PPC_NVR_MIN _R27
static inline bool bpf_has_stack_frame(struct codegen_context *ctx)
{
@ -136,7 +136,7 @@ void bpf_jit_build_prologue(u32 *image, struct codegen_context *ctx)
if (ctx->seen & SEEN_TAILCALL) {
EMIT(PPC_RAW_LI(b2p[TMP_REG_1], 0));
/* this goes in the redzone */
EMIT(PPC_RAW_STD(b2p[TMP_REG_1], 1, -(BPF_PPC_STACK_SAVE + 8)));
EMIT(PPC_RAW_STD(b2p[TMP_REG_1], _R1, -(BPF_PPC_STACK_SAVE + 8)));
} else {
EMIT(PPC_RAW_NOP());
EMIT(PPC_RAW_NOP());
@ -149,10 +149,10 @@ void bpf_jit_build_prologue(u32 *image, struct codegen_context *ctx)
*/
if (ctx->seen & SEEN_FUNC) {
EMIT(PPC_RAW_MFLR(_R0));
EMIT(PPC_RAW_STD(0, 1, PPC_LR_STKOFF));
EMIT(PPC_RAW_STD(_R0, _R1, PPC_LR_STKOFF));
}
EMIT(PPC_RAW_STDU(1, 1, -(BPF_PPC_STACKFRAME + ctx->stack_size)));
EMIT(PPC_RAW_STDU(_R1, _R1, -(BPF_PPC_STACKFRAME + ctx->stack_size)));
}
/*
@ -162,11 +162,11 @@ void bpf_jit_build_prologue(u32 *image, struct codegen_context *ctx)
*/
for (i = BPF_REG_6; i <= BPF_REG_10; i++)
if (bpf_is_seen_register(ctx, b2p[i]))
EMIT(PPC_RAW_STD(b2p[i], 1, bpf_jit_stack_offsetof(ctx, b2p[i])));
EMIT(PPC_RAW_STD(b2p[i], _R1, bpf_jit_stack_offsetof(ctx, b2p[i])));
/* Setup frame pointer to point to the bpf stack area */
if (bpf_is_seen_register(ctx, b2p[BPF_REG_FP]))
EMIT(PPC_RAW_ADDI(b2p[BPF_REG_FP], 1,
EMIT(PPC_RAW_ADDI(b2p[BPF_REG_FP], _R1,
STACK_FRAME_MIN_SIZE + ctx->stack_size));
}
@ -177,14 +177,14 @@ static void bpf_jit_emit_common_epilogue(u32 *image, struct codegen_context *ctx
/* Restore NVRs */
for (i = BPF_REG_6; i <= BPF_REG_10; i++)
if (bpf_is_seen_register(ctx, b2p[i]))
EMIT(PPC_RAW_LD(b2p[i], 1, bpf_jit_stack_offsetof(ctx, b2p[i])));
EMIT(PPC_RAW_LD(b2p[i], _R1, bpf_jit_stack_offsetof(ctx, b2p[i])));
/* Tear down our stack frame */
if (bpf_has_stack_frame(ctx)) {
EMIT(PPC_RAW_ADDI(1, 1, BPF_PPC_STACKFRAME + ctx->stack_size));
EMIT(PPC_RAW_ADDI(_R1, _R1, BPF_PPC_STACKFRAME + ctx->stack_size));
if (ctx->seen & SEEN_FUNC) {
EMIT(PPC_RAW_LD(0, 1, PPC_LR_STKOFF));
EMIT(PPC_RAW_MTLR(0));
EMIT(PPC_RAW_LD(_R0, _R1, PPC_LR_STKOFF));
EMIT(PPC_RAW_MTLR(_R0));
}
}
}
@ -194,7 +194,7 @@ void bpf_jit_build_epilogue(u32 *image, struct codegen_context *ctx)
bpf_jit_emit_common_epilogue(image, ctx);
/* Move result to r3 */
EMIT(PPC_RAW_MR(3, b2p[BPF_REG_0]));
EMIT(PPC_RAW_MR(_R3, b2p[BPF_REG_0]));
EMIT(PPC_RAW_BLR());
}
@ -232,7 +232,7 @@ int bpf_jit_emit_func_call_rel(u32 *image, struct codegen_context *ctx, u64 func
func += FUNCTION_DESCR_SIZE;
/* Load function address into r12 */
PPC_LI64(12, func);
PPC_LI64(_R12, func);
/* For bpf-to-bpf function calls, the callee's address is unknown
* until the last extra pass. As seen above, we use PPC_LI64() to
@ -247,7 +247,7 @@ int bpf_jit_emit_func_call_rel(u32 *image, struct codegen_context *ctx, u64 func
for (i = ctx->idx - ctx_idx; i < 5; i++)
EMIT(PPC_RAW_NOP());
EMIT(PPC_RAW_MTCTR(12));
EMIT(PPC_RAW_MTCTR(_R12));
EMIT(PPC_RAW_BCTRL());
return 0;
@ -281,7 +281,7 @@ static int bpf_jit_emit_tail_call(u32 *image, struct codegen_context *ctx, u32 o
* if (tail_call_cnt >= MAX_TAIL_CALL_CNT)
* goto out;
*/
EMIT(PPC_RAW_LD(b2p[TMP_REG_1], 1, bpf_jit_stack_tailcallcnt(ctx)));
EMIT(PPC_RAW_LD(b2p[TMP_REG_1], _R1, bpf_jit_stack_tailcallcnt(ctx)));
EMIT(PPC_RAW_CMPLWI(b2p[TMP_REG_1], MAX_TAIL_CALL_CNT));
PPC_BCC_SHORT(COND_GE, out);
@ -289,7 +289,7 @@ static int bpf_jit_emit_tail_call(u32 *image, struct codegen_context *ctx, u32 o
* tail_call_cnt++;
*/
EMIT(PPC_RAW_ADDI(b2p[TMP_REG_1], b2p[TMP_REG_1], 1));
EMIT(PPC_RAW_STD(b2p[TMP_REG_1], 1, bpf_jit_stack_tailcallcnt(ctx)));
EMIT(PPC_RAW_STD(b2p[TMP_REG_1], _R1, bpf_jit_stack_tailcallcnt(ctx)));
/* prog = array->ptrs[index]; */
EMIT(PPC_RAW_MULI(b2p[TMP_REG_1], b2p_index, 8));
@ -680,8 +680,8 @@ bpf_alu32_trunc:
break;
case 64:
/* Store the value to stack and then use byte-reverse loads */
EMIT(PPC_RAW_STD(dst_reg, 1, bpf_jit_stack_local(ctx)));
EMIT(PPC_RAW_ADDI(b2p[TMP_REG_1], 1, bpf_jit_stack_local(ctx)));
EMIT(PPC_RAW_STD(dst_reg, _R1, bpf_jit_stack_local(ctx)));
EMIT(PPC_RAW_ADDI(b2p[TMP_REG_1], _R1, bpf_jit_stack_local(ctx)));
if (cpu_has_feature(CPU_FTR_ARCH_206)) {
EMIT(PPC_RAW_LDBRX(dst_reg, 0, b2p[TMP_REG_1]));
} else {
@ -736,8 +736,8 @@ emit_clear:
break;
case STF_BARRIER_FALLBACK:
ctx->seen |= SEEN_FUNC;
PPC_LI64(12, dereference_kernel_function_descriptor(bpf_stf_barrier));
EMIT(PPC_RAW_MTCTR(12));
PPC_LI64(_R12, dereference_kernel_function_descriptor(bpf_stf_barrier));
EMIT(PPC_RAW_MTCTR(_R12));
EMIT(PPC_RAW_BCTRL());
break;
case STF_BARRIER_NONE:
@ -952,7 +952,7 @@ emit_clear:
return ret;
/* move return value from r3 to BPF_REG_0 */
EMIT(PPC_RAW_MR(b2p[BPF_REG_0], 3));
EMIT(PPC_RAW_MR(b2p[BPF_REG_0], _R3));
break;
/*