Final fixes for 5.1-rc0
- minor documentation nit
- docker.py bootstrap fixes
- tweak containers.yml wildcards
- fix float16 nan detection
- conditional use of -Wpsabi
- fix missing iotlb data for plugins
- proper locking for helper based bb count
- drop ppc64abi32 from the plugin check-tcg test
# gpg: Signature made Wed 15 Jul 2020 11:59:08 BST
# gpg: using RSA key
6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44
* remotes/stsquad/tags/pull-misc-for-rc0-150720-3:
.travis.yml: skip ppc64abi32-linux-user with plugins
plugins: expand the bb plugin to be thread safe and track per-cpu
cputlb: ensure we save the IOTLB data in case of reset
tests/plugins: don't unconditionally add -Wpsabi
fpu/softfloat: fix up float16 nan recognition
gitlab-ci/containers: Add missing wildcard where we should look for changes
docker.py: fix fetching of FROM layers
tests/docker: Remove the libssh workaround from the ubuntu 20.04 image
docs/devel: fix grammar in multi-thread-tcg
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
- changes:
- .gitlab-ci.d/containers.yml
- tests/docker/*
+ - tests/docker/dockerfiles/*
- if: '$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
- if: '$CI_COMMIT_REF_NAME == "testing/next"'
# Run check-tcg against linux-user (with plugins)
# we skip sparc64-linux-user until it has been fixed somewhat
# we skip cris-linux-user as it doesn't use the common run loop
+ # we skip ppc64abi32-linux-user as it seems to have a broken libc
- name: "GCC plugins check-tcg (user)"
env:
- - CONFIG="--disable-system --enable-plugins --enable-debug-tcg --target-list-exclude=sparc64-linux-user,cris-linux-user"
+ - CONFIG="--disable-system --enable-plugins --enable-debug-tcg --target-list-exclude=sparc64-linux-user,cris-linux-user,ppc64abi32-linux-user"
- TEST_BUILD_CMD="make build-tcg"
- TEST_CMD="make check-tcg"
- CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-debug-tcg"
return val;
}
+/*
+ * Save a potentially trashed IOTLB entry for later lookup by plugin.
+ *
+ * We also need to track the thread storage address because the RCU
+ * cleanup that runs when we leave the critical region (the current
+ * execution) is actually in a different thread.
+ */
+static void save_iotlb_data(CPUState *cs, hwaddr addr,
+ MemoryRegionSection *section, hwaddr mr_offset)
+{
+#ifdef CONFIG_PLUGIN
+ SavedIOTLB *saved = &cs->saved_iotlb;
+ saved->addr = addr;
+ saved->section = section;
+ saved->mr_offset = mr_offset;
+#endif
+}
+
static void io_writex(CPUArchState *env, CPUIOTLBEntry *iotlbentry,
int mmu_idx, uint64_t val, target_ulong addr,
uintptr_t retaddr, MemOp op)
}
cpu->mem_io_pc = retaddr;
+ /*
+ * The memory_region_dispatch may trigger a flush/resize
+ * so for plugins we save the iotlb_data just in case.
+ */
+ save_iotlb_data(cpu, iotlbentry->addr, section, mr_offset);
+
if (mr->global_locking && !qemu_mutex_iothread_locked()) {
qemu_mutex_lock_iothread();
locked = true;
* in the softmmu lookup code (or helper). We don't handle re-fills or
* checking the victim table. This is purely informational.
*
- * This should never fail as the memory access being instrumented
- * should have just filled the TLB.
+ * This almost never fails as the memory access being instrumented
+ * should have just filled the TLB. The one corner case is io_writex
+ * which can cause TLB flushes and potential resizing of the TLBs
+ * loosing the information we need. In those cases we need to recover
+ * data from a copy of the io_tlb entry.
*/
bool tlb_plugin_lookup(CPUState *cpu, target_ulong addr, int mmu_idx,
data->v.ram.hostaddr = addr + tlbe->addend;
}
return true;
+ } else {
+ SavedIOTLB *saved = &cpu->saved_iotlb;
+ data->is_io = true;
+ data->v.io.section = saved->section;
+ data->v.io.offset = saved->mr_offset;
+ return true;
}
- return false;
}
#endif
echo "ARCH=$ARCH" >> $config_host_mak
+echo "GLIB_CFLAGS=$glib_cflags" >> $config_host_mak
+echo "GLIB_LDFLAGS=$glib_ldflags" >> $config_host_mak
+
if test "$default_devices" = "yes" ; then
echo "CONFIG_MINIKCONF_MODE=--defconfig" >> $config_host_mak
else
- debugging operations (breakpoint insertion/removal)
- some CPU helper functions
- - linux-user spawning it's first thread
+ - linux-user spawning its first thread
This is done with the async_safe_run_on_cpu() mechanism to ensure all
vCPUs are quiescent when changes are being made to shared global
if (snan_bit_is_one(status)) {
return (((a >> 9) & 0x3F) == 0x3E) && (a & 0x1FF);
} else {
- return ((a & ~0x8000) >= 0x7C80);
+ return ((a >> 9) & 0x3F) == 0x3F;
}
#endif
}
#else
uint16_t a = float16_val(a_);
if (snan_bit_is_one(status)) {
- return ((a & ~0x8000) >= 0x7C80);
+ return ((a >> 9) & 0x3F) == 0x3F;
} else {
return (((a >> 9) & 0x3F) == 0x3E) && (a & 0x1FF);
}
QTAILQ_ENTRY(CPUWatchpoint) entry;
};
+#ifdef CONFIG_PLUGIN
+/*
+ * For plugins we sometime need to save the resolved iotlb data before
+ * the memory regions get moved around by io_writex.
+ */
+typedef struct SavedIOTLB {
+ hwaddr addr;
+ MemoryRegionSection *section;
+ hwaddr mr_offset;
+} SavedIOTLB;
+#endif
+
struct KVMState;
struct kvm_run;
DECLARE_BITMAP(plugin_mask, QEMU_PLUGIN_EV_MAX);
+#ifdef CONFIG_PLUGIN
GArray *plugin_mem_cbs;
+ /* saved iotlb data from io_writex */
+ SavedIOTLB saved_iotlb;
+#endif
/* TODO Move common fields from CPUArchState here. */
int cpu_index;
typedef struct QString QString;
typedef struct RAMBlock RAMBlock;
typedef struct Range Range;
+typedef struct SavedIOTLB SavedIOTLB;
typedef struct SHPCDevice SHPCDevice;
typedef struct SSIBus SSIBus;
typedef struct VirtIODevice VirtIODevice;
checksum = _text_checksum(_dockerfile_preprocess(dockerfile))
if registry is not None:
- # see if we can fetch a cache copy, may fail...
- pull_args = ["pull", "%s/%s" % (registry, tag)]
- if self._do(pull_args, quiet=quiet) == 0:
+ sources = re.findall("FROM qemu\/(.*)", dockerfile)
+ # Fetch any cache layers we can, may fail
+ for s in sources:
+ pull_args = ["pull", "%s/qemu/%s" % (registry, s)]
+ if self._do(pull_args, quiet=quiet) != 0:
+ registry = None
+ break
+ # Make substitutions
+ if registry is not None:
dockerfile = dockerfile.replace("FROM qemu/",
"FROM %s/qemu/" %
(registry))
- else:
- registry = None
tmp_df = tempfile.NamedTemporaryFile(mode="w+t",
encoding='utf-8',
build_args += ["--build-arg", "BUILDKIT_INLINE_CACHE=1"]
if registry is not None:
+ pull_args = ["pull", "%s/%s" % (registry, tag)]
+ self._do(pull_args, quiet=quiet)
cache = "%s/%s" % (registry, tag)
build_args += ["--cache-from", cache]
build_args += argv
RUN dpkg -l $PACKAGES | sort > /packages.txt
ENV FEATURES clang tsan pyyaml sdl2
-# https://bugs.launchpad.net/qemu/+bug/1838763
-ENV QEMU_CONFIGURE_OPTS --disable-libssh
-
# Apply patch https://reviews.llvm.org/D75820
# This is required for TSan in clang-10 to compile with QEMU.
RUN sed -i 's/^const/static const/g' /usr/lib/llvm-10/lib/clang/10.0.0/include/sanitizer/tsan_interface.h
+# -*- Mode: makefile -*-
+#
+# This Makefile example is fairly independent from the main makefile
+# so users can take and adapt it for their build. We only really
+# include config-host.mak so we don't have to repeat probing for
+# cflags that the main configure has already done for us.
+#
+
BUILD_DIR := $(CURDIR)/../..
include $(BUILD_DIR)/config-host.mak
-include $(SRC_PATH)/rules.mak
-$(call set-vpath, $(SRC_PATH)/tests/plugin)
+VPATH += $(SRC_PATH)/tests/plugin
NAMES :=
NAMES += bb
SONAMES := $(addsuffix .so,$(addprefix lib,$(NAMES)))
-QEMU_CFLAGS += -fPIC -Wpsabi
-QEMU_CFLAGS += -I$(SRC_PATH)/include/qemu
+# The main QEMU uses Glib extensively so it's perfectly fine to use it
+# in plugins (which many example do).
+CFLAGS = $(GLIB_CFLAGS)
+CFLAGS += -fPIC
+CFLAGS += $(if $(findstring no-psabi,$(QEMU_CFLAGS)),-Wpsabi)
+CFLAGS += -I$(SRC_PATH)/include/qemu
all: $(SONAMES)
+%.o: %.c
+ $(CC) $(CFLAGS) -c -o $@ $<
+
lib%.so: %.o
$(CC) -shared -Wl,-soname,$@ -o $@ $^ $(LDLIBS)
QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
-static uint64_t bb_count;
-static uint64_t insn_count;
+typedef struct {
+ GMutex lock;
+ int index;
+ uint64_t bb_count;
+ uint64_t insn_count;
+} CPUCount;
+
+/* Used by the inline & linux-user counts */
static bool do_inline;
+static CPUCount inline_count;
+
+/* Dump running CPU total on idle? */
+static bool idle_report;
+static GPtrArray *counts;
+static int max_cpus;
+
+static void gen_one_cpu_report(CPUCount *count, GString *report)
+{
+ if (count->bb_count) {
+ g_string_append_printf(report, "CPU%d: "
+ "bb's: %" PRIu64", insns: %" PRIu64 "\n",
+ count->index,
+ count->bb_count, count->insn_count);
+ }
+}
static void plugin_exit(qemu_plugin_id_t id, void *p)
{
- g_autofree gchar *out = g_strdup_printf(
- "bb's: %" PRIu64", insns: %" PRIu64 "\n",
- bb_count, insn_count);
- qemu_plugin_outs(out);
+ g_autoptr(GString) report = g_string_new("");
+
+ if (do_inline || !max_cpus) {
+ g_string_printf(report, "bb's: %" PRIu64", insns: %" PRIu64 "\n",
+ inline_count.bb_count, inline_count.insn_count);
+ } else {
+ g_ptr_array_foreach(counts, (GFunc) gen_one_cpu_report, report);
+ }
+ qemu_plugin_outs(report->str);
+}
+
+static void vcpu_idle(qemu_plugin_id_t id, unsigned int cpu_index)
+{
+ CPUCount *count = g_ptr_array_index(counts, cpu_index);
+ g_autoptr(GString) report = g_string_new("");
+ gen_one_cpu_report(count, report);
+
+ if (report->len > 0) {
+ g_string_prepend(report, "Idling ");
+ qemu_plugin_outs(report->str);
+ }
}
static void vcpu_tb_exec(unsigned int cpu_index, void *udata)
{
- unsigned long n_insns = (unsigned long)udata;
+ CPUCount *count = max_cpus ?
+ g_ptr_array_index(counts, cpu_index) : &inline_count;
- insn_count += n_insns;
- bb_count++;
+ unsigned long n_insns = (unsigned long)udata;
+ g_mutex_lock(&count->lock);
+ count->insn_count += n_insns;
+ count->bb_count++;
+ g_mutex_unlock(&count->lock);
}
static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
if (do_inline) {
qemu_plugin_register_vcpu_tb_exec_inline(tb, QEMU_PLUGIN_INLINE_ADD_U64,
- &bb_count, 1);
+ &inline_count.bb_count, 1);
qemu_plugin_register_vcpu_tb_exec_inline(tb, QEMU_PLUGIN_INLINE_ADD_U64,
- &insn_count, n_insns);
+ &inline_count.insn_count,
+ n_insns);
} else {
qemu_plugin_register_vcpu_tb_exec_cb(tb, vcpu_tb_exec,
QEMU_PLUGIN_CB_NO_REGS,
const qemu_info_t *info,
int argc, char **argv)
{
- if (argc && strcmp(argv[0], "inline") == 0) {
- do_inline = true;
+ int i;
+
+ for (i = 0; i < argc; i++) {
+ char *opt = argv[i];
+ if (g_strcmp0(opt, "inline") == 0) {
+ do_inline = true;
+ } else if (g_strcmp0(opt, "idle") == 0) {
+ idle_report = true;
+ } else {
+ fprintf(stderr, "option parsing failed: %s\n", opt);
+ return -1;
+ }
+ }
+
+ if (info->system_emulation && !do_inline) {
+ max_cpus = info->system.max_vcpus;
+ counts = g_ptr_array_new();
+ for (i = 0; i < max_cpus; i++) {
+ CPUCount *count = g_new0(CPUCount, 1);
+ g_mutex_init(&count->lock);
+ count->index = i;
+ g_ptr_array_add(counts, count);
+ }
+ } else if (!do_inline) {
+ g_mutex_init(&inline_count.lock);
+ }
+
+ if (idle_report) {
+ qemu_plugin_register_vcpu_idle_cb(id, vcpu_idle);
}
qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
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