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(localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id AC47E1FFAB; Wed, 31 Jul 2019 17:07:21 +0100 (BST) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Date: Wed, 31 Jul 2019 17:06:48 +0100 Message-Id: <20190731160719.11396-24-alex.bennee@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190731160719.11396-1-alex.bennee@linaro.org> References: <20190731160719.11396-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::342 Subject: [Qemu-devel] [PATCH v4 23/54] tcg: let plugins instrument virtual memory accesses 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: aaron@os.amperecomputing.com, cota@braap.org, Paolo Bonzini , bobby.prani@gmail.com, =?UTF-8?q?Alex=20Benn=C3=A9e?= , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: "Emilio G. Cota" To capture all memory accesses we need hook into all the various helper functions that are involved in memory operations as well as the injected inline helper calls. A later commit will allow us to resolve the actual guest HW addresses by replaying the lookup. Signed-off-by: Emilio G. Cota [AJB: drop haddr handling, just deal in vaddr] Signed-off-by: Alex Bennée --- v3 - fixes for cpu_neg() v4 - rebase fixups, moved cpu_neg() fixes down the stack - drop haddr support - will be restored with later helper - reword commit --- accel/tcg/atomic_common.inc.c | 4 +++ accel/tcg/atomic_template.h | 1 + accel/tcg/cpu-exec.c | 3 ++ accel/tcg/cputlb.c | 14 ++++---- include/exec/cpu-defs.h | 1 + include/exec/cpu_ldst_template.h | 28 +++++++++------- include/exec/cpu_ldst_useronly_template.h | 29 ++++++++-------- tcg/tcg-op.c | 40 ++++++++++++++++++----- tcg/tcg.h | 1 + 9 files changed, 79 insertions(+), 42 deletions(-) diff --git a/accel/tcg/atomic_common.inc.c b/accel/tcg/atomic_common.inc.c index a86098fb2de..344525b0bb3 100644 --- a/accel/tcg/atomic_common.inc.c +++ b/accel/tcg/atomic_common.inc.c @@ -25,6 +25,8 @@ void atomic_trace_rmw_pre(CPUArchState *env, target_ulong addr, uint16_t info) static inline void atomic_trace_rmw_post(CPUArchState *env, target_ulong addr, uint16_t info) { + qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, info); + qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, info | TRACE_MEM_ST); } static inline @@ -36,6 +38,7 @@ void atomic_trace_ld_pre(CPUArchState *env, target_ulong addr, uint16_t info) static inline void atomic_trace_ld_post(CPUArchState *env, target_ulong addr, uint16_t info) { + qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, info); } static inline @@ -47,4 +50,5 @@ void atomic_trace_st_pre(CPUArchState *env, target_ulong addr, uint16_t info) static inline void atomic_trace_st_post(CPUArchState *env, target_ulong addr, uint16_t info) { + qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, info); } diff --git a/accel/tcg/atomic_template.h b/accel/tcg/atomic_template.h index 34f891d4a62..4f209c8e18c 100644 --- a/accel/tcg/atomic_template.h +++ b/accel/tcg/atomic_template.h @@ -18,6 +18,7 @@ * License along with this library; if not, see . */ +#include "qemu/plugin.h" #include "trace/mem.h" #if DATA_SIZE == 16 diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c index ab9dfd4f908..81be72a373d 100644 --- a/accel/tcg/cpu-exec.c +++ b/accel/tcg/cpu-exec.c @@ -269,6 +269,7 @@ void cpu_exec_step_atomic(CPUState *cpu) qemu_mutex_unlock_iothread(); } assert_no_pages_locked(); + qemu_plugin_disable_mem_helpers(cpu); } if (cpu_in_exclusive_context(cpu)) { @@ -702,6 +703,8 @@ int cpu_exec(CPUState *cpu) if (qemu_mutex_iothread_locked()) { qemu_mutex_unlock_iothread(); } + qemu_plugin_disable_mem_helpers(cpu); + assert_no_pages_locked(); } diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index e4ac06041a2..f7c0290639c 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -881,7 +881,7 @@ static void tlb_fill(CPUState *cpu, target_ulong addr, int size, static uint64_t io_readx(CPUArchState *env, CPUIOTLBEntry *iotlbentry, int mmu_idx, target_ulong addr, uintptr_t retaddr, - MMUAccessType access_type, int size) + TCGMemOp mo, MMUAccessType access_type, int size) { CPUState *cpu = env_cpu(env); hwaddr mr_offset; @@ -925,7 +925,7 @@ static uint64_t io_readx(CPUArchState *env, CPUIOTLBEntry *iotlbentry, static void io_writex(CPUArchState *env, CPUIOTLBEntry *iotlbentry, int mmu_idx, uint64_t val, target_ulong addr, - uintptr_t retaddr, int size) + uintptr_t retaddr, TCGMemOp mo, int size) { CPUState *cpu = env_cpu(env); hwaddr mr_offset; @@ -1264,7 +1264,8 @@ load_helper(CPUArchState *env, target_ulong addr, TCGMemOpIdx oi, offsetof(CPUTLBEntry, addr_code) : offsetof(CPUTLBEntry, addr_read); const MMUAccessType access_type = code_read ? MMU_INST_FETCH : MMU_DATA_LOAD; - unsigned a_bits = get_alignment_bits(get_memop(oi)); + TCGMemOp mo = get_memop(oi); + unsigned a_bits = get_alignment_bits(mo); void *haddr; uint64_t res; @@ -1313,7 +1314,7 @@ load_helper(CPUArchState *env, target_ulong addr, TCGMemOpIdx oi, } res = io_readx(env, &env_tlb(env)->d[mmu_idx].iotlb[index], - mmu_idx, addr, retaddr, access_type, size); + mmu_idx, addr, retaddr, mo, access_type, size); return handle_bswap(res, size, big_endian); } @@ -1513,7 +1514,8 @@ store_helper(CPUArchState *env, target_ulong addr, uint64_t val, CPUTLBEntry *entry = tlb_entry(env, mmu_idx, addr); target_ulong tlb_addr = tlb_addr_write(entry); const size_t tlb_off = offsetof(CPUTLBEntry, addr_write); - unsigned a_bits = get_alignment_bits(get_memop(oi)); + TCGMemOp mo = get_memop(oi); + unsigned a_bits = get_alignment_bits(mo); void *haddr; /* Handle CPU specific unaligned behaviour */ @@ -1562,7 +1564,7 @@ store_helper(CPUArchState *env, target_ulong addr, uint64_t val, io_writex(env, &env_tlb(env)->d[mmu_idx].iotlb[index], mmu_idx, handle_bswap(val, size, big_endian), - addr, retaddr, size); + addr, retaddr, mo, size); return; } diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h index 9bc713a70b2..31deca369ea 100644 --- a/include/exec/cpu-defs.h +++ b/include/exec/cpu-defs.h @@ -215,6 +215,7 @@ typedef struct CPUTLBCommon { * Since this is placed within CPUNegativeOffsetState, the smallest * negative offsets are at the end of the struct. */ + typedef struct CPUTLB { CPUTLBCommon c; CPUTLBDesc d[NB_MMU_MODES]; diff --git a/include/exec/cpu_ldst_template.h b/include/exec/cpu_ldst_template.h index 5750a26b9ec..6f0d3407979 100644 --- a/include/exec/cpu_ldst_template.h +++ b/include/exec/cpu_ldst_template.h @@ -28,6 +28,7 @@ #include "trace-root.h" #endif +#include "qemu/plugin.h" #include "trace/mem.h" #if DATA_SIZE == 8 @@ -86,11 +87,9 @@ glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(CPUArchState *env, target_ulong addr; int mmu_idx = CPU_MMU_INDEX; TCGMemOpIdx oi; - #if !defined(SOFTMMU_CODE_ACCESS) - trace_guest_mem_before_exec( - env_cpu(env), ptr, - trace_mem_build_info(SHIFT, false, MO_TE, false, mmu_idx)); + uint16_t meminfo = trace_mem_build_info(SHIFT, false, MO_TE, false, mmu_idx); + trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo); #endif addr = ptr; @@ -104,6 +103,9 @@ glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(CPUArchState *env, uintptr_t hostaddr = addr + entry->addend; res = glue(glue(ld, USUFFIX), _p)((uint8_t *)hostaddr); } +#ifndef SOFTMMU_CODE_ACCESS + qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo); +#endif return res; } @@ -124,11 +126,9 @@ glue(glue(glue(cpu_lds, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env, target_ulong addr; int mmu_idx = CPU_MMU_INDEX; TCGMemOpIdx oi; - #if !defined(SOFTMMU_CODE_ACCESS) - trace_guest_mem_before_exec( - env_cpu(env), ptr, - trace_mem_build_info(SHIFT, true, MO_TE, false, mmu_idx)); + uint16_t meminfo = trace_mem_build_info(SHIFT, true, MO_TE, false, mmu_idx); + trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo); #endif addr = ptr; @@ -142,6 +142,9 @@ glue(glue(glue(cpu_lds, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env, uintptr_t hostaddr = addr + entry->addend; res = glue(glue(lds, SUFFIX), _p)((uint8_t *)hostaddr); } +#ifndef SOFTMMU_CODE_ACCESS + qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo); +#endif return res; } @@ -165,11 +168,9 @@ glue(glue(glue(cpu_st, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env, target_ulong addr; int mmu_idx = CPU_MMU_INDEX; TCGMemOpIdx oi; - #if !defined(SOFTMMU_CODE_ACCESS) - trace_guest_mem_before_exec( - env_cpu(env), ptr, - trace_mem_build_info(SHIFT, false, MO_TE, true, mmu_idx)); + uint16_t meminfo = trace_mem_build_info(SHIFT, false, MO_TE, true, mmu_idx); + trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo); #endif addr = ptr; @@ -183,6 +184,9 @@ glue(glue(glue(cpu_st, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env, uintptr_t hostaddr = addr + entry->addend; glue(glue(st, SUFFIX), _p)((uint8_t *)hostaddr, v); } +#ifndef SOFTMMU_CODE_ACCESS + qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo); +#endif } static inline void diff --git a/include/exec/cpu_ldst_useronly_template.h b/include/exec/cpu_ldst_useronly_template.h index 8f7f117ad44..5cd0fa3b99d 100644 --- a/include/exec/cpu_ldst_useronly_template.h +++ b/include/exec/cpu_ldst_useronly_template.h @@ -64,18 +64,17 @@ static inline RES_TYPE glue(glue(cpu_ld, USUFFIX), MEMSUFFIX)(CPUArchState *env, abi_ptr ptr) { -#ifdef CODE_ACCESS RES_TYPE ret; +#ifdef CODE_ACCESS set_helper_retaddr(1); ret = glue(glue(ld, USUFFIX), _p)(g2h(ptr)); clear_helper_retaddr(); - return ret; #else - trace_guest_mem_before_exec( - env_cpu(env), ptr, - trace_mem_build_info(SHIFT, false, MO_TE, false, 0)); - return glue(glue(ld, USUFFIX), _p)(g2h(ptr)); + uint16_t meminfo = trace_mem_build_info(SHIFT, false, MO_TE, false, 0); + trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo); + ret = glue(glue(ld, USUFFIX), _p)(g2h(ptr)); #endif + return ret; } #ifndef CODE_ACCESS @@ -96,18 +95,18 @@ glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(CPUArchState *env, static inline int glue(glue(cpu_lds, SUFFIX), MEMSUFFIX)(CPUArchState *env, abi_ptr ptr) { -#ifdef CODE_ACCESS int ret; +#ifdef CODE_ACCESS set_helper_retaddr(1); ret = glue(glue(lds, SUFFIX), _p)(g2h(ptr)); clear_helper_retaddr(); - return ret; #else - trace_guest_mem_before_exec( - env_cpu(env), ptr, - trace_mem_build_info(SHIFT, true, MO_TE, false, 0)); - return glue(glue(lds, SUFFIX), _p)(g2h(ptr)); + uint16_t meminfo = trace_mem_build_info(SHIFT, true, MO_TE, false, 0); + trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo); + ret = glue(glue(lds, SUFFIX), _p)(g2h(ptr)); + qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo); #endif + return ret; } #ifndef CODE_ACCESS @@ -130,10 +129,10 @@ static inline void glue(glue(cpu_st, SUFFIX), MEMSUFFIX)(CPUArchState *env, abi_ptr ptr, RES_TYPE v) { - trace_guest_mem_before_exec( - env_cpu(env), ptr, - trace_mem_build_info(SHIFT, false, MO_TE, true, 0)); + uint16_t meminfo = trace_mem_build_info(SHIFT, false, MO_TE, true, 0); + trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo); glue(glue(st, SUFFIX), _p)(g2h(ptr), v); + qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo); } static inline void diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index 38e62dcba97..b60b42e6410 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -30,6 +30,7 @@ #include "tcg-mo.h" #include "trace-tcg.h" #include "trace/mem.h" +#include "exec/plugin-gen.h" /* Reduce the number of ifdefs below. This assumes that all uses of TCGV_HIGH and TCGV_LOW are properly protected by a conditional that @@ -2684,6 +2685,7 @@ void tcg_gen_exit_tb(TranslationBlock *tb, unsigned idx) tcg_debug_assert(idx == TB_EXIT_REQUESTED); } + plugin_gen_disable_mem_helpers(); tcg_gen_op1i(INDEX_op_exit_tb, val); } @@ -2696,6 +2698,7 @@ void tcg_gen_goto_tb(unsigned idx) tcg_debug_assert((tcg_ctx->goto_tb_issue_mask & (1 << idx)) == 0); tcg_ctx->goto_tb_issue_mask |= 1 << idx; #endif + plugin_gen_disable_mem_helpers(); /* When not chaining, we simply fall through to the "fallback" exit. */ if (!qemu_loglevel_mask(CPU_LOG_TB_NOCHAIN)) { tcg_gen_op1i(INDEX_op_goto_tb, idx); @@ -2705,7 +2708,10 @@ void tcg_gen_goto_tb(unsigned idx) void tcg_gen_lookup_and_goto_ptr(void) { if (TCG_TARGET_HAS_goto_ptr && !qemu_loglevel_mask(CPU_LOG_TB_NOCHAIN)) { - TCGv_ptr ptr = tcg_temp_new_ptr(); + TCGv_ptr ptr; + + plugin_gen_disable_mem_helpers(); + ptr = tcg_temp_new_ptr(); gen_helper_lookup_tb_ptr(ptr, cpu_env); tcg_gen_op1i(INDEX_op_goto_ptr, tcgv_ptr_arg(ptr)); tcg_temp_free_ptr(ptr); @@ -2788,14 +2794,24 @@ static void tcg_gen_req_mo(TCGBar type) } } +static inline void plugin_gen_mem_callbacks(TCGv vaddr, uint16_t info) +{ +#ifdef CONFIG_PLUGIN + if (tcg_ctx->plugin_insn == NULL) { + return; + } + plugin_gen_empty_mem_callback(vaddr, info); +#endif +} + void tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, TCGMemOp memop) { TCGMemOp orig_memop; + uint16_t info = trace_mem_get_info(memop, idx, 0); tcg_gen_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD); memop = tcg_canonicalize_memop(memop, 0, 0); - trace_guest_mem_before_tcg(tcg_ctx->cpu, cpu_env, - addr, trace_mem_get_info(memop, idx, 0)); + trace_guest_mem_before_tcg(tcg_ctx->cpu, cpu_env, addr, info); orig_memop = memop; if (!TCG_TARGET_HAS_MEMORY_BSWAP && (memop & MO_BSWAP)) { @@ -2807,6 +2823,7 @@ void tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, TCGMemOp memop) } gen_ldst_i32(INDEX_op_qemu_ld_i32, val, addr, memop, idx); + plugin_gen_mem_callbacks(addr, info); if ((orig_memop ^ memop) & MO_BSWAP) { switch (orig_memop & MO_SIZE) { @@ -2828,11 +2845,11 @@ void tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, TCGMemOp memop) void tcg_gen_qemu_st_i32(TCGv_i32 val, TCGv addr, TCGArg idx, TCGMemOp memop) { TCGv_i32 swap = NULL; + uint16_t info = trace_mem_get_info(memop, idx, 1); tcg_gen_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST); memop = tcg_canonicalize_memop(memop, 0, 1); - trace_guest_mem_before_tcg(tcg_ctx->cpu, cpu_env, - addr, trace_mem_get_info(memop, idx, 1)); + trace_guest_mem_before_tcg(tcg_ctx->cpu, cpu_env, addr, info); if (!TCG_TARGET_HAS_MEMORY_BSWAP && (memop & MO_BSWAP)) { swap = tcg_temp_new_i32(); @@ -2852,6 +2869,7 @@ void tcg_gen_qemu_st_i32(TCGv_i32 val, TCGv addr, TCGArg idx, TCGMemOp memop) } gen_ldst_i32(INDEX_op_qemu_st_i32, val, addr, memop, idx); + plugin_gen_mem_callbacks(addr, info); if (swap) { tcg_temp_free_i32(swap); @@ -2861,6 +2879,7 @@ void tcg_gen_qemu_st_i32(TCGv_i32 val, TCGv addr, TCGArg idx, TCGMemOp memop) void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, TCGMemOp memop) { TCGMemOp orig_memop; + uint16_t info; if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) { tcg_gen_qemu_ld_i32(TCGV_LOW(val), addr, idx, memop); @@ -2874,8 +2893,8 @@ void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, TCGMemOp memop) tcg_gen_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD); memop = tcg_canonicalize_memop(memop, 1, 0); - trace_guest_mem_before_tcg(tcg_ctx->cpu, cpu_env, - addr, trace_mem_get_info(memop, idx, 0)); + info = trace_mem_get_info(memop, idx, 0); + trace_guest_mem_before_tcg(tcg_ctx->cpu, cpu_env, addr, info); orig_memop = memop; if (!TCG_TARGET_HAS_MEMORY_BSWAP && (memop & MO_BSWAP)) { @@ -2887,6 +2906,7 @@ void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, TCGMemOp memop) } gen_ldst_i64(INDEX_op_qemu_ld_i64, val, addr, memop, idx); + plugin_gen_mem_callbacks(addr, info); if ((orig_memop ^ memop) & MO_BSWAP) { switch (orig_memop & MO_SIZE) { @@ -2914,6 +2934,7 @@ void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, TCGMemOp memop) void tcg_gen_qemu_st_i64(TCGv_i64 val, TCGv addr, TCGArg idx, TCGMemOp memop) { TCGv_i64 swap = NULL; + uint16_t info; if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) { tcg_gen_qemu_st_i32(TCGV_LOW(val), addr, idx, memop); @@ -2922,8 +2943,8 @@ void tcg_gen_qemu_st_i64(TCGv_i64 val, TCGv addr, TCGArg idx, TCGMemOp memop) tcg_gen_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST); memop = tcg_canonicalize_memop(memop, 1, 1); - trace_guest_mem_before_tcg(tcg_ctx->cpu, cpu_env, - addr, trace_mem_get_info(memop, idx, 1)); + info = trace_mem_get_info(memop, idx, 1); + trace_guest_mem_before_tcg(tcg_ctx->cpu, cpu_env, addr, info); if (!TCG_TARGET_HAS_MEMORY_BSWAP && (memop & MO_BSWAP)) { swap = tcg_temp_new_i64(); @@ -2947,6 +2968,7 @@ void tcg_gen_qemu_st_i64(TCGv_i64 val, TCGv addr, TCGArg idx, TCGMemOp memop) } gen_ldst_i64(INDEX_op_qemu_st_i64, val, addr, memop, idx); + plugin_gen_mem_callbacks(addr, info); if (swap) { tcg_temp_free_i64(swap); diff --git a/tcg/tcg.h b/tcg/tcg.h index 2385e758e55..93f52f4ca93 100644 --- a/tcg/tcg.h +++ b/tcg/tcg.h @@ -28,6 +28,7 @@ #include "cpu.h" #include "exec/tb-context.h" #include "qemu/bitops.h" +#include "qemu/plugin.h" #include "qemu/queue.h" #include "tcg-mo.h" #include "tcg-target.h" -- 2.20.1