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TCG, plugin and build fixes: 

- introduce CF_NOIRQ to avoid watchpoint race
   - fix avocado plugin test
   - fix linker issue with weird paths
   - band-aid for gdbstub race
   - updates for MAINTAINERS
   - fix some compiler warning in example plugin
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Merge tag 'pull-for-6.2-291121-1' of https://github.com/stsquad/qemu into staging

TCG, plugin and build fixes:

  - introduce CF_NOIRQ to avoid watchpoint race
  - fix avocado plugin test
  - fix linker issue with weird paths
  - band-aid for gdbstub race
  - updates for MAINTAINERS
  - fix some compiler warning in example plugin

# gpg: Signature made Mon 29 Nov 2021 04:16:22 PM CET
# gpg:                using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]

* tag 'pull-for-6.2-291121-1' of https://github.com/stsquad/qemu:
  tests/plugin/syscall.c: fix compiler warnings
  MAINTAINERS: Add section for Aarch64 GitLab custom runner
  MAINTAINERS: Remove me as a reviewer for the build and test/avocado
  gdbstub: handle a potentially racing TaskState
  plugins/meson.build: fix linker issue with weird paths
  tests/avocado: fix tcg_plugin mem access count test
  accel/tcg: suppress IRQ check for special TBs
  accel/tcg: introduce CF_NOIRQ

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-11-29 18:58:06 +01:00
parent 095c7737fb d5615bbf91
commit a0fd8a5492
10 changed files with 46 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
MAINTAINERS
View File

@ -3469,7 +3469,7 @@ M: Alex Bennée <alex.bennee@linaro.org>
M: Philippe Mathieu-Daudé <f4bug@amsat.org>
M: Thomas Huth <thuth@redhat.com>
R: Wainer dos Santos Moschetta <wainersm@redhat.com>
R: Willian Rampazzo <willianr@redhat.com>
R: Beraldo Leal <bleal@redhat.com>
S: Maintained
F: .github/lockdown.yml
F: .gitlab-ci.yml
@ -3507,10 +3507,16 @@ W: https://trello.com/b/6Qi1pxVn/avocado-qemu
R: Cleber Rosa <crosa@redhat.com>
R: Philippe Mathieu-Daudé <philmd@redhat.com>
R: Wainer dos Santos Moschetta <wainersm@redhat.com>
R: Willian Rampazzo <willianr@redhat.com>
R: Beraldo Leal <bleal@redhat.com>
S: Odd Fixes
F: tests/avocado/
GitLab custom runner (Works On Arm Sponsored)
M: Alex Bennée <alex.bennee@linaro.org>
M: Philippe Mathieu-Daudé <f4bug@amsat.org>
S: Maintained
F: .gitlab-ci.d/custom-runners/ubuntu-20.04-aarch64.yml
Documentation
-------------
Build system architecture

9
accel/tcg/cpu-exec.c
View File

@ -721,6 +721,15 @@ static inline bool need_replay_interrupt(int interrupt_request)
static inline bool cpu_handle_interrupt(CPUState *cpu,
TranslationBlock **last_tb)
{
/*
* If we have requested custom cflags with CF_NOIRQ we should
* skip checking here. Any pending interrupts will get picked up
* by the next TB we execute under normal cflags.
*/
if (cpu->cflags_next_tb != -1 && cpu->cflags_next_tb & CF_NOIRQ) {
return false;
}
/* Clear the interrupt flag now since we're processing
* cpu->interrupt_request and cpu->exit_request.
* Ensure zeroing happens before reading cpu->exit_request or

4
accel/tcg/translate-all.c
View File

@ -1738,7 +1738,7 @@ tb_invalidate_phys_page_range__locked(struct page_collection *pages,
if (current_tb_modified) {
page_collection_unlock(pages);
/* Force execution of one insn next time. */
cpu->cflags_next_tb = 1 | curr_cflags(cpu);
cpu->cflags_next_tb = 1 | CF_NOIRQ | curr_cflags(cpu);
mmap_unlock();
cpu_loop_exit_noexc(cpu);
}
@ -1906,7 +1906,7 @@ static bool tb_invalidate_phys_page(tb_page_addr_t addr, uintptr_t pc)
#ifdef TARGET_HAS_PRECISE_SMC
if (current_tb_modified) {
/* Force execution of one insn next time. */
cpu->cflags_next_tb = 1 | curr_cflags(cpu);
cpu->cflags_next_tb = 1 | CF_NOIRQ | curr_cflags(cpu);
return true;
}
#endif

2
gdbstub.c
View File

@ -94,7 +94,7 @@ static inline int cpu_gdb_index(CPUState *cpu)
{
#if defined(CONFIG_USER_ONLY)
TaskState *ts = (TaskState *) cpu->opaque;
return ts->ts_tid;
return ts ? ts->ts_tid : -1;
#else
return cpu->cpu_index + 1;
#endif

1
include/exec/exec-all.h
View File

@ -503,6 +503,7 @@ struct TranslationBlock {
#define CF_USE_ICOUNT 0x00020000
#define CF_INVALID 0x00040000 /* TB is stale. Set with @jmp_lock held */
#define CF_PARALLEL 0x00080000 /* Generate code for a parallel context */
#define CF_NOIRQ 0x00100000 /* Generate an uninterruptible TB */
#define CF_CLUSTER_MASK 0xff000000 /* Top 8 bits are cluster ID */
#define CF_CLUSTER_SHIFT 24

21
include/exec/gen-icount.h
View File

@ -21,7 +21,6 @@ static inline void gen_tb_start(const TranslationBlock *tb)
{
TCGv_i32 count;
tcg_ctx->exitreq_label = gen_new_label();
if (tb_cflags(tb) & CF_USE_ICOUNT) {
count = tcg_temp_local_new_i32();
} else {
@ -42,7 +41,19 @@ static inline void gen_tb_start(const TranslationBlock *tb)
icount_start_insn = tcg_last_op();
}
tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, tcg_ctx->exitreq_label);
/*
* Emit the check against icount_decr.u32 to see if we should exit
* unless we suppress the check with CF_NOIRQ. If we are using
* icount and have suppressed interruption the higher level code
* should have ensured we don't run more instructions than the
* budget.
*/
if (tb_cflags(tb) & CF_NOIRQ) {
tcg_ctx->exitreq_label = NULL;
} else {
tcg_ctx->exitreq_label = gen_new_label();
tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, tcg_ctx->exitreq_label);
}
if (tb_cflags(tb) & CF_USE_ICOUNT) {
tcg_gen_st16_i32(count, cpu_env,
@ -74,8 +85,10 @@ static inline void gen_tb_end(const TranslationBlock *tb, int num_insns)
tcgv_i32_arg(tcg_constant_i32(num_insns)));
}
gen_set_label(tcg_ctx->exitreq_label);
tcg_gen_exit_tb(tb, TB_EXIT_REQUESTED);
if (tcg_ctx->exitreq_label) {
gen_set_label(tcg_ctx->exitreq_label);
tcg_gen_exit_tb(tb, TB_EXIT_REQUESTED);
}
}
#endif

4
plugins/meson.build
View File

@ -2,9 +2,9 @@ plugin_ldflags = []
# Modules need more symbols than just those in plugins/qemu-plugins.symbols
if not enable_modules
if 'CONFIG_HAS_LD_DYNAMIC_LIST' in config_host
plugin_ldflags = ['-Wl,--dynamic-list=' + (meson.project_build_root() / 'qemu-plugins-ld.symbols')]
plugin_ldflags = ['-Wl,--dynamic-list=qemu-plugins-ld.symbols']
elif 'CONFIG_HAS_LD_EXPORTED_SYMBOLS_LIST' in config_host
plugin_ldflags = ['-Wl,-exported_symbols_list,' + (meson.project_build_root() / 'qemu-plugins-ld64.symbols')]
plugin_ldflags = ['-Wl,-exported_symbols_list,qemu-plugins-ld64.symbols']
endif
endif

4
softmmu/physmem.c
View File

@ -912,7 +912,7 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
*/
if (!cpu->can_do_io) {
/* Force execution of one insn next time. */
cpu->cflags_next_tb = 1 | CF_LAST_IO | curr_cflags(cpu);
cpu->cflags_next_tb = 1 | CF_LAST_IO | CF_NOIRQ | curr_cflags(cpu);
cpu_loop_exit_restore(cpu, ra);
}
/*
@ -946,7 +946,7 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
cpu_loop_exit(cpu);
} else {
/* Force execution of one insn next time. */
cpu->cflags_next_tb = 1 | CF_LAST_IO | curr_cflags(cpu);
cpu->cflags_next_tb = 1 | CF_LAST_IO | CF_NOIRQ | curr_cflags(cpu);
mmap_unlock();
cpu_loop_exit_noexc(cpu);
}

2
tests/avocado/tcg_plugins.py
View File

@ -131,7 +131,7 @@ class PluginKernelNormal(PluginKernelBase):
suffix=".log")
self.run_vm(kernel_path, kernel_command_line,
"tests/plugin/libmem.so,arg=both", plugin_log.name,
"tests/plugin/libmem.so,inline=true,callback=true", plugin_log.name,
console_pattern,
args=('-icount', 'shift=1'))

8
tests/plugin/syscall.c
View File

@ -70,19 +70,17 @@ static void vcpu_syscall_ret(qemu_plugin_id_t id, unsigned int vcpu_idx,
}
g_mutex_unlock(&lock);
} else {
g_autofree gchar *out;
out = g_strdup_printf("syscall #%" PRIi64 " returned -> %" PRIi64 "\n",
num, ret);
g_autofree gchar *out = g_strdup_printf(
"syscall #%" PRIi64 " returned -> %" PRIi64 "\n", num, ret);
qemu_plugin_outs(out);
}
}
static void print_entry(gpointer val, gpointer user_data)
{
g_autofree gchar *out;
SyscallStats *entry = (SyscallStats *) val;
int64_t syscall_num = entry->num;
out = g_strdup_printf(
g_autofree gchar *out = g_strdup_printf(
"%-13" PRIi64 "%-6" PRIi64 " %" PRIi64 "\n",
syscall_num, entry->calls, entry->errors);
qemu_plugin_outs(out);