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[173.197.107.21]) by smtp.gmail.com with ESMTPSA id v6sm6516265pfi.31.2021.01.07.12.15.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Jan 2021 12:15:39 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PULL 27/47] tcg/aarch64: Support split-wx code generation Date: Thu, 7 Jan 2021 10:14:28 -1000 Message-Id: <20210107201448.1152301-28-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210107201448.1152301-1-richard.henderson@linaro.org> References: <20210107201448.1152301-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::533; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x533.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Joelle van Dyne Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" Reviewed-by: Joelle van Dyne Signed-off-by: Richard Henderson --- tcg/aarch64/tcg-target.h | 2 +- tcg/aarch64/tcg-target.c.inc | 57 ++++++++++++++++++++---------------- 2 files changed, 33 insertions(+), 26 deletions(-) -- 2.25.1 diff --git a/tcg/aarch64/tcg-target.h b/tcg/aarch64/tcg-target.h index 23bf87db3d..079828ea71 100644 --- a/tcg/aarch64/tcg-target.h +++ b/tcg/aarch64/tcg-target.h @@ -155,6 +155,6 @@ void tb_target_set_jmp_target(uintptr_t, uintptr_t, uintptr_t, uintptr_t); #define TCG_TARGET_NEED_LDST_LABELS #endif #define TCG_TARGET_NEED_POOL_LABELS -#define TCG_TARGET_SUPPORT_MIRROR 0 +#define TCG_TARGET_SUPPORT_MIRROR 1 #endif /* AARCH64_TCG_TARGET_H */ diff --git a/tcg/aarch64/tcg-target.c.inc b/tcg/aarch64/tcg-target.c.inc index bd888bc66d..2e33162c03 100644 --- a/tcg/aarch64/tcg-target.c.inc +++ b/tcg/aarch64/tcg-target.c.inc @@ -78,38 +78,42 @@ static const int tcg_target_call_oarg_regs[1] = { #define TCG_REG_GUEST_BASE TCG_REG_X28 #endif -static inline bool reloc_pc26(tcg_insn_unit *code_ptr, tcg_insn_unit *target) +static bool reloc_pc26(tcg_insn_unit *src_rw, const tcg_insn_unit *target) { - ptrdiff_t offset = target - code_ptr; + const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); + ptrdiff_t offset = target - src_rx; + if (offset == sextract64(offset, 0, 26)) { /* read instruction, mask away previous PC_REL26 parameter contents, set the proper offset, then write back the instruction. */ - *code_ptr = deposit32(*code_ptr, 0, 26, offset); + *src_rw = deposit32(*src_rw, 0, 26, offset); return true; } return false; } -static inline bool reloc_pc19(tcg_insn_unit *code_ptr, tcg_insn_unit *target) +static bool reloc_pc19(tcg_insn_unit *src_rw, const tcg_insn_unit *target) { - ptrdiff_t offset = target - code_ptr; + const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); + ptrdiff_t offset = target - src_rx; + if (offset == sextract64(offset, 0, 19)) { - *code_ptr = deposit32(*code_ptr, 5, 19, offset); + *src_rw = deposit32(*src_rw, 5, 19, offset); return true; } return false; } -static inline bool patch_reloc(tcg_insn_unit *code_ptr, int type, - intptr_t value, intptr_t addend) +static bool patch_reloc(tcg_insn_unit *code_ptr, int type, + intptr_t value, intptr_t addend) { tcg_debug_assert(addend == 0); switch (type) { case R_AARCH64_JUMP26: case R_AARCH64_CALL26: - return reloc_pc26(code_ptr, (tcg_insn_unit *)value); + return reloc_pc26(code_ptr, (const tcg_insn_unit *)value); case R_AARCH64_CONDBR19: - return reloc_pc19(code_ptr, (tcg_insn_unit *)value); + return reloc_pc19(code_ptr, (const tcg_insn_unit *)value); default: g_assert_not_reached(); } @@ -1050,12 +1054,13 @@ static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd, /* Look for host pointer values within 4G of the PC. This happens often when loading pointers to QEMU's own data structures. */ if (type == TCG_TYPE_I64) { - tcg_target_long disp = value - (intptr_t)s->code_ptr; + intptr_t src_rx = (intptr_t)tcg_splitwx_to_rx(s->code_ptr); + tcg_target_long disp = value - src_rx; if (disp == sextract64(disp, 0, 21)) { tcg_out_insn(s, 3406, ADR, rd, disp); return; } - disp = (value >> 12) - ((intptr_t)s->code_ptr >> 12); + disp = (value >> 12) - (src_rx >> 12); if (disp == sextract64(disp, 0, 21)) { tcg_out_insn(s, 3406, ADRP, rd, disp); if (value & 0xfff) { @@ -1308,14 +1313,14 @@ static void tcg_out_cmp(TCGContext *s, TCGType ext, TCGReg a, static void tcg_out_goto(TCGContext *s, const tcg_insn_unit *target) { - ptrdiff_t offset = target - s->code_ptr; + ptrdiff_t offset = tcg_pcrel_diff(s, target) >> 2; tcg_debug_assert(offset == sextract64(offset, 0, 26)); tcg_out_insn(s, 3206, B, offset); } -static inline void tcg_out_goto_long(TCGContext *s, tcg_insn_unit *target) +static void tcg_out_goto_long(TCGContext *s, const tcg_insn_unit *target) { - ptrdiff_t offset = target - s->code_ptr; + ptrdiff_t offset = tcg_pcrel_diff(s, target) >> 2; if (offset == sextract64(offset, 0, 26)) { tcg_out_insn(s, 3206, B, offset); } else { @@ -1329,9 +1334,9 @@ static inline void tcg_out_callr(TCGContext *s, TCGReg reg) tcg_out_insn(s, 3207, BLR, reg); } -static inline void tcg_out_call(TCGContext *s, const tcg_insn_unit *target) +static void tcg_out_call(TCGContext *s, const tcg_insn_unit *target) { - ptrdiff_t offset = target - s->code_ptr; + ptrdiff_t offset = tcg_pcrel_diff(s, target) >> 2; if (offset == sextract64(offset, 0, 26)) { tcg_out_insn(s, 3206, BL, offset); } else { @@ -1393,7 +1398,7 @@ static void tcg_out_brcond(TCGContext *s, TCGType ext, TCGCond c, TCGArg a, tcg_out_reloc(s, s->code_ptr, R_AARCH64_CONDBR19, l, 0); offset = tcg_in32(s) >> 5; } else { - offset = l->u.value_ptr - s->code_ptr; + offset = tcg_pcrel_diff(s, l->u.value_ptr) >> 2; tcg_debug_assert(offset == sextract64(offset, 0, 19)); } @@ -1568,7 +1573,7 @@ static void * const qemu_st_helpers[16] = { [MO_BEQ] = helper_be_stq_mmu, }; -static inline void tcg_out_adr(TCGContext *s, TCGReg rd, void *target) +static inline void tcg_out_adr(TCGContext *s, TCGReg rd, const void *target) { ptrdiff_t offset = tcg_pcrel_diff(s, target); tcg_debug_assert(offset == sextract64(offset, 0, 21)); @@ -1581,7 +1586,7 @@ static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb) MemOp opc = get_memop(oi); MemOp size = opc & MO_SIZE; - if (!reloc_pc19(lb->label_ptr[0], s->code_ptr)) { + if (!reloc_pc19(lb->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { return false; } @@ -1606,7 +1611,7 @@ static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb) MemOp opc = get_memop(oi); MemOp size = opc & MO_SIZE; - if (!reloc_pc19(lb->label_ptr[0], s->code_ptr)) { + if (!reloc_pc19(lb->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { return false; } @@ -1631,7 +1636,8 @@ static void add_qemu_ldst_label(TCGContext *s, bool is_ld, TCGMemOpIdx oi, label->type = ext; label->datalo_reg = data_reg; label->addrlo_reg = addr_reg; - label->raddr = raddr; + /* TODO: Cast goes away when all hosts converted */ + label->raddr = (void *)tcg_splitwx_to_rx(raddr); label->label_ptr[0] = label_ptr; } @@ -1849,7 +1855,7 @@ static void tcg_out_qemu_st(TCGContext *s, TCGReg data_reg, TCGReg addr_reg, #endif /* CONFIG_SOFTMMU */ } -static tcg_insn_unit *tb_ret_addr; +static const tcg_insn_unit *tb_ret_addr; static void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg args[TCG_MAX_OP_ARGS], @@ -2894,11 +2900,12 @@ static void tcg_target_qemu_prologue(TCGContext *s) * Return path for goto_ptr. Set return value to 0, a-la exit_tb, * and fall through to the rest of the epilogue. */ - tcg_code_gen_epilogue = s->code_ptr; + /* TODO: Cast goes away when all hosts converted */ + tcg_code_gen_epilogue = (void *)tcg_splitwx_to_rx(s->code_ptr); tcg_out_movi(s, TCG_TYPE_REG, TCG_REG_X0, 0); /* TB epilogue */ - tb_ret_addr = s->code_ptr; + tb_ret_addr = tcg_splitwx_to_rx(s->code_ptr); /* Remove TCG locals stack space. */ tcg_out_insn(s, 3401, ADDI, TCG_TYPE_I64, TCG_REG_SP, TCG_REG_SP,