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plugins: Reorg arguments to qemu_plugin_vcpu_mem_cb

Browse source 
Use the MemOpIdx directly, rather than the rearrangement
of the same bits currently done by the trace infrastructure.
Pass in enum qemu_plugin_mem_rw so that we are able to treat
read-modify-write operations as a single operation.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-07-26 11:48:30 -10:00
parent c3e83e376c
commit 37aff08726
8 changed files with 82 additions and 53 deletions
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13
accel/tcg/atomic_common.c.inc
View file

@ -26,10 +26,7 @@ static void atomic_trace_rmw_pre(CPUArchState *env, target_ulong addr,
static void atomic_trace_rmw_post(CPUArchState *env, target_ulong addr,
MemOpIdx oi)
{
uint16_t info = trace_mem_get_info(oi, false);
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, info);
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, info | TRACE_MEM_ST);
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, oi, QEMU_PLUGIN_MEM_RW);
}
#if HAVE_ATOMIC128
@ -44,9 +41,7 @@ static void atomic_trace_ld_pre(CPUArchState *env, target_ulong addr,
static void atomic_trace_ld_post(CPUArchState *env, target_ulong addr,
MemOpIdx oi)
{
uint16_t info = trace_mem_get_info(oi, false);
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, info);
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, oi, QEMU_PLUGIN_MEM_R);
}
static void atomic_trace_st_pre(CPUArchState *env, target_ulong addr,
@ -60,9 +55,7 @@ static void atomic_trace_st_pre(CPUArchState *env, target_ulong addr,
static void atomic_trace_st_post(CPUArchState *env, target_ulong addr,
MemOpIdx oi)
{
uint16_t info = trace_mem_get_info(oi, false);
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, info);
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, oi, QEMU_PLUGIN_MEM_W);
}
#endif

4
accel/tcg/cputlb.c
View file

@ -2120,7 +2120,7 @@ static inline uint64_t cpu_load_helper(CPUArchState *env, abi_ptr addr,
ret = full_load(env, addr, oi, retaddr);
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, oi, QEMU_PLUGIN_MEM_R);
return ret;
}
@ -2556,7 +2556,7 @@ cpu_store_helper(CPUArchState *env, target_ulong addr, uint64_t val,
store_helper(env, addr, val, oi, retaddr, op);
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, oi, QEMU_PLUGIN_MEM_W);
}
void cpu_stb_mmuidx_ra(CPUArchState *env, target_ulong addr, uint32_t val,

5
accel/tcg/plugin-gen.c
View file

@ -45,7 +45,6 @@
#include "qemu/osdep.h"
#include "tcg/tcg.h"
#include "tcg/tcg-op.h"
#include "trace/mem.h"
#include "exec/exec-all.h"
#include "exec/plugin-gen.h"
#include "exec/translator.h"
@ -211,9 +210,9 @@ static void gen_mem_wrapped(enum plugin_gen_cb type,
const union mem_gen_fn *f, TCGv addr,
uint32_t info, bool is_mem)
{
int wr = !!(info & TRACE_MEM_ST);
enum qemu_plugin_mem_rw rw = get_plugin_meminfo_rw(info);
gen_plugin_cb_start(PLUGIN_GEN_FROM_MEM, type, wr);
gen_plugin_cb_start(PLUGIN_GEN_FROM_MEM, type, rw);
if (is_mem) {
f->mem_fn(addr, info);
} else {

28
accel/tcg/user-exec.c
View file

@ -894,7 +894,7 @@ uint32_t cpu_ldub_data(CPUArchState *env, abi_ptr ptr)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
ret = ldub_p(g2h(env_cpu(env), ptr));
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_R);
return ret;
}
@ -911,7 +911,7 @@ uint32_t cpu_lduw_be_data(CPUArchState *env, abi_ptr ptr)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
ret = lduw_be_p(g2h(env_cpu(env), ptr));
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_R);
return ret;
}
@ -928,7 +928,7 @@ uint32_t cpu_ldl_be_data(CPUArchState *env, abi_ptr ptr)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
ret = ldl_be_p(g2h(env_cpu(env), ptr));
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_R);
return ret;
}
@ -940,7 +940,7 @@ uint64_t cpu_ldq_be_data(CPUArchState *env, abi_ptr ptr)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
ret = ldq_be_p(g2h(env_cpu(env), ptr));
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_R);
return ret;
}
@ -952,7 +952,7 @@ uint32_t cpu_lduw_le_data(CPUArchState *env, abi_ptr ptr)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
ret = lduw_le_p(g2h(env_cpu(env), ptr));
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_R);
return ret;
}
@ -969,7 +969,7 @@ uint32_t cpu_ldl_le_data(CPUArchState *env, abi_ptr ptr)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
ret = ldl_le_p(g2h(env_cpu(env), ptr));
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_R);
return ret;
}
@ -981,7 +981,7 @@ uint64_t cpu_ldq_le_data(CPUArchState *env, abi_ptr ptr)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
ret = ldq_le_p(g2h(env_cpu(env), ptr));
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_R);
return ret;
}
@ -1077,7 +1077,7 @@ void cpu_stb_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
stb_p(g2h(env_cpu(env), ptr), val);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_W);
}
void cpu_stw_be_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
@ -1087,7 +1087,7 @@ void cpu_stw_be_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
stw_be_p(g2h(env_cpu(env), ptr), val);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_W);
}
void cpu_stl_be_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
@ -1097,7 +1097,7 @@ void cpu_stl_be_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
stl_be_p(g2h(env_cpu(env), ptr), val);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_W);
}
void cpu_stq_be_data(CPUArchState *env, abi_ptr ptr, uint64_t val)
@ -1107,7 +1107,7 @@ void cpu_stq_be_data(CPUArchState *env, abi_ptr ptr, uint64_t val)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
stq_be_p(g2h(env_cpu(env), ptr), val);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_W);
}
void cpu_stw_le_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
@ -1117,7 +1117,7 @@ void cpu_stw_le_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
stw_le_p(g2h(env_cpu(env), ptr), val);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_W);
}
void cpu_stl_le_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
@ -1127,7 +1127,7 @@ void cpu_stl_le_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
stl_le_p(g2h(env_cpu(env), ptr), val);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_W);
}
void cpu_stq_le_data(CPUArchState *env, abi_ptr ptr, uint64_t val)
@ -1137,7 +1137,7 @@ void cpu_stq_le_data(CPUArchState *env, abi_ptr ptr, uint64_t val)
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
stq_le_p(g2h(env_cpu(env), ptr), val);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, oi, QEMU_PLUGIN_MEM_W);
}
void cpu_stb_data_ra(CPUArchState *env, abi_ptr ptr,

26
include/qemu/plugin.h
View file

@ -12,6 +12,7 @@
#include "qemu/error-report.h"
#include "qemu/queue.h"
#include "qemu/option.h"
#include "exec/memopidx.h"
/*
* Events that plugins can subscribe to.
@ -36,6 +37,25 @@ enum qemu_plugin_event {
struct qemu_plugin_desc;
typedef QTAILQ_HEAD(, qemu_plugin_desc) QemuPluginList;
/*
* Construct a qemu_plugin_meminfo_t.
*/
static inline qemu_plugin_meminfo_t
make_plugin_meminfo(MemOpIdx oi, enum qemu_plugin_mem_rw rw)
{
return oi | (rw << 16);
}
/*
* Extract the memory operation direction from a qemu_plugin_meminfo_t.
* Other portions may be extracted via get_memop and get_mmuidx.
*/
static inline enum qemu_plugin_mem_rw
get_plugin_meminfo_rw(qemu_plugin_meminfo_t i)
{
return i >> 16;
}
#ifdef CONFIG_PLUGIN
extern QemuOptsList qemu_plugin_opts;
@ -180,7 +200,8 @@ qemu_plugin_vcpu_syscall(CPUState *cpu, int64_t num, uint64_t a1,
uint64_t a6, uint64_t a7, uint64_t a8);
void qemu_plugin_vcpu_syscall_ret(CPUState *cpu, int64_t num, int64_t ret);
void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr, uint32_t meminfo);
void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr,
MemOpIdx oi, enum qemu_plugin_mem_rw rw);
void qemu_plugin_flush_cb(void);
@ -244,7 +265,8 @@ void qemu_plugin_vcpu_syscall_ret(CPUState *cpu, int64_t num, int64_t ret)
{ }
static inline void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr,
uint32_t meminfo)
MemOpIdx oi,
enum qemu_plugin_mem_rw rw)
{ }
static inline void qemu_plugin_flush_cb(void)

19
plugins/api.c
View file

@ -45,7 +45,6 @@
#include "qemu/plugin-memory.h"
#include "hw/boards.h"
#endif
#include "trace/mem.h"
/* Uninstall and Reset handlers */
@ -246,22 +245,25 @@ const char *qemu_plugin_insn_symbol(const struct qemu_plugin_insn *insn)
unsigned qemu_plugin_mem_size_shift(qemu_plugin_meminfo_t info)
{
return info & TRACE_MEM_SZ_SHIFT_MASK;
MemOp op = get_memop(info);
return op & MO_SIZE;
}
bool qemu_plugin_mem_is_sign_extended(qemu_plugin_meminfo_t info)
{
return !!(info & TRACE_MEM_SE);
MemOp op = get_memop(info);
return op & MO_SIGN;
}
bool qemu_plugin_mem_is_big_endian(qemu_plugin_meminfo_t info)
{
return !!(info & TRACE_MEM_BE);
MemOp op = get_memop(info);
return (op & MO_BSWAP) == MO_BE;
}
bool qemu_plugin_mem_is_store(qemu_plugin_meminfo_t info)
{
return !!(info & TRACE_MEM_ST);
return get_plugin_meminfo_rw(info) & QEMU_PLUGIN_MEM_W;
}
/*
@ -277,11 +279,12 @@ struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info,
{
#ifdef CONFIG_SOFTMMU
CPUState *cpu = current_cpu;
unsigned int mmu_idx = info >> TRACE_MEM_MMU_SHIFT;
hwaddr_info.is_store = info & TRACE_MEM_ST;
unsigned int mmu_idx = get_mmuidx(info);
enum qemu_plugin_mem_rw rw = get_plugin_meminfo_rw(info);
hwaddr_info.is_store = (rw & QEMU_PLUGIN_MEM_W) != 0;
if (!tlb_plugin_lookup(cpu, vaddr, mmu_idx,
info & TRACE_MEM_ST, &hwaddr_info)) {
hwaddr_info.is_store, &hwaddr_info)) {
error_report("invalid use of qemu_plugin_get_hwaddr");
return NULL;
}

10
plugins/core.c
View file

@ -27,7 +27,6 @@
#include "exec/helper-proto.h"
#include "tcg/tcg.h"
#include "tcg/tcg-op.h"
#include "trace/mem.h" /* mem_info macros */
#include "plugin.h"
#include "qemu/compiler.h"
@ -446,7 +445,8 @@ void exec_inline_op(struct qemu_plugin_dyn_cb *cb)
}
}
void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr, uint32_t info)
void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr,
MemOpIdx oi, enum qemu_plugin_mem_rw rw)
{
GArray *arr = cpu->plugin_mem_cbs;
size_t i;
@ -457,14 +457,14 @@ void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr, uint32_t info)
for (i = 0; i < arr->len; i++) {
struct qemu_plugin_dyn_cb *cb =
&g_array_index(arr, struct qemu_plugin_dyn_cb, i);
int w = !!(info & TRACE_MEM_ST) + 1;
if (!(w & cb->rw)) {
if (!(rw & cb->rw)) {
break;
}
switch (cb->type) {
case PLUGIN_CB_REGULAR:
cb->f.vcpu_mem(cpu->cpu_index, info, vaddr, cb->userp);
cb->f.vcpu_mem(cpu->cpu_index, make_plugin_meminfo(oi, rw),
vaddr, cb->userp);
break;
case PLUGIN_CB_INLINE:
exec_inline_op(cb);

30
tcg/tcg-op.c
View file

@ -2853,10 +2853,12 @@ static inline TCGv plugin_prep_mem_callbacks(TCGv vaddr)
return vaddr;
}
static inline void plugin_gen_mem_callbacks(TCGv vaddr, uint16_t info)
static void plugin_gen_mem_callbacks(TCGv vaddr, MemOpIdx oi,
enum qemu_plugin_mem_rw rw)
{
#ifdef CONFIG_PLUGIN
if (tcg_ctx->plugin_insn != NULL) {
qemu_plugin_meminfo_t info = make_plugin_meminfo(oi, rw);
plugin_gen_empty_mem_callback(vaddr, info);
tcg_temp_free(vaddr);
}
@ -2866,10 +2868,13 @@ static inline void plugin_gen_mem_callbacks(TCGv vaddr, uint16_t info)
void tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, MemOp memop)
{
MemOp orig_memop;
uint16_t info = trace_mem_get_info(make_memop_idx(memop, idx), 0);
MemOpIdx oi;
uint16_t info;
tcg_gen_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD);
memop = tcg_canonicalize_memop(memop, 0, 0);
oi = make_memop_idx(memop, idx);
info = trace_mem_get_info(oi, 0);
trace_guest_mem_before_tcg(tcg_ctx->cpu, cpu_env, addr, info);
orig_memop = memop;
@ -2883,7 +2888,7 @@ void tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, MemOp memop)
addr = plugin_prep_mem_callbacks(addr);
gen_ldst_i32(INDEX_op_qemu_ld_i32, val, addr, memop, idx);
plugin_gen_mem_callbacks(addr, info);
plugin_gen_mem_callbacks(addr, oi, QEMU_PLUGIN_MEM_R);
if ((orig_memop ^ memop) & MO_BSWAP) {
switch (orig_memop & MO_SIZE) {
@ -2904,10 +2909,13 @@ void tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, MemOp memop)
void tcg_gen_qemu_st_i32(TCGv_i32 val, TCGv addr, TCGArg idx, MemOp memop)
{
TCGv_i32 swap = NULL;
uint16_t info = trace_mem_get_info(make_memop_idx(memop, idx), 1);
MemOpIdx oi;
uint16_t info;
tcg_gen_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST);
memop = tcg_canonicalize_memop(memop, 0, 1);
oi = make_memop_idx(memop, idx);
info = trace_mem_get_info(oi, 1);
trace_guest_mem_before_tcg(tcg_ctx->cpu, cpu_env, addr, info);
if (!TCG_TARGET_HAS_MEMORY_BSWAP && (memop & MO_BSWAP)) {
@ -2932,7 +2940,7 @@ void tcg_gen_qemu_st_i32(TCGv_i32 val, TCGv addr, TCGArg idx, MemOp memop)
} else {
gen_ldst_i32(INDEX_op_qemu_st_i32, val, addr, memop, idx);
}
plugin_gen_mem_callbacks(addr, info);
plugin_gen_mem_callbacks(addr, oi, QEMU_PLUGIN_MEM_W);
if (swap) {
tcg_temp_free_i32(swap);
@ -2942,6 +2950,7 @@ void tcg_gen_qemu_st_i32(TCGv_i32 val, TCGv addr, TCGArg idx, MemOp memop)
void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop)
{
MemOp orig_memop;
MemOpIdx oi;
uint16_t info;
if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) {
@ -2956,7 +2965,8 @@ void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop)
tcg_gen_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD);
memop = tcg_canonicalize_memop(memop, 1, 0);
info = trace_mem_get_info(make_memop_idx(memop, idx), 0);
oi = make_memop_idx(memop, idx);
info = trace_mem_get_info(oi, 0);
trace_guest_mem_before_tcg(tcg_ctx->cpu, cpu_env, addr, info);
orig_memop = memop;
@ -2970,7 +2980,7 @@ void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop)
addr = plugin_prep_mem_callbacks(addr);
gen_ldst_i64(INDEX_op_qemu_ld_i64, val, addr, memop, idx);
plugin_gen_mem_callbacks(addr, info);
plugin_gen_mem_callbacks(addr, oi, QEMU_PLUGIN_MEM_R);
if ((orig_memop ^ memop) & MO_BSWAP) {
int flags = (orig_memop & MO_SIGN
@ -2995,6 +3005,7 @@ void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop)
void tcg_gen_qemu_st_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop)
{
TCGv_i64 swap = NULL;
MemOpIdx oi;
uint16_t info;
if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) {
@ -3004,7 +3015,8 @@ void tcg_gen_qemu_st_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop)
tcg_gen_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST);
memop = tcg_canonicalize_memop(memop, 1, 1);
info = trace_mem_get_info(make_memop_idx(memop, idx), 1);
oi = make_memop_idx(memop, idx);
info = trace_mem_get_info(oi, 1);
trace_guest_mem_before_tcg(tcg_ctx->cpu, cpu_env, addr, info);
if (!TCG_TARGET_HAS_MEMORY_BSWAP && (memop & MO_BSWAP)) {
@ -3028,7 +3040,7 @@ void tcg_gen_qemu_st_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop)
addr = plugin_prep_mem_callbacks(addr);
gen_ldst_i64(INDEX_op_qemu_st_i64, val, addr, memop, idx);
plugin_gen_mem_callbacks(addr, info);
plugin_gen_mem_callbacks(addr, oi, QEMU_PLUGIN_MEM_W);
if (swap) {
tcg_temp_free_i64(swap);