From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: pbonzini@redhat.com, alex.bennee@linaro.org, stefanha@redhat.com,
david@redhat.com
Subject: [Qemu-devel] [RFC v2 4/5] exec: Adjust notdirty tracing
Date: Wed, 18 Sep 2019 11:02:50 -0700 [thread overview]
Message-ID: <20190918180251.32003-5-richard.henderson@linaro.org> (raw)
In-Reply-To: <20190918180251.32003-1-richard.henderson@linaro.org>
The memory_region_tb_read tracepoint is unreachable, since notdirty
is supposed to apply only to writes. The memory_region_tb_write
tracepoint is mis-named, because notdirty is not only used for TB
invalidation. It is also used for e.g. VGA RAM updates and migration.
Replace memory_region_tb_write with memory_notdirty_write_access,
and place it in memory_notdirty_write_prepare where it can catch
all of the instances. Add memory_notdirty_set_dirty to log when
we no longer intercept writes to a page.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Rename new tracepoints as suggested (David)
---
exec.c | 3 +++
memory.c | 4 ----
trace-events | 4 ++--
3 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/exec.c b/exec.c
index 8b998974f8..5f2587b621 100644
--- a/exec.c
+++ b/exec.c
@@ -2755,6 +2755,8 @@ void memory_notdirty_write_prepare(NotDirtyInfo *ndi,
ndi->size = size;
ndi->pages = NULL;
+ trace_memory_notdirty_write_access(mem_vaddr, ram_addr, size);
+
assert(tcg_enabled());
if (!cpu_physical_memory_get_dirty_flag(ram_addr, DIRTY_MEMORY_CODE)) {
ndi->pages = page_collection_lock(ram_addr, ram_addr + size);
@@ -2779,6 +2781,7 @@ void memory_notdirty_write_complete(NotDirtyInfo *ndi)
/* we remove the notdirty callback only if the code has been
flushed */
if (!cpu_physical_memory_is_clean(ndi->ram_addr)) {
+ trace_memory_notdirty_set_dirty(ndi->mem_vaddr);
tlb_set_dirty(ndi->cpu, ndi->mem_vaddr);
}
}
diff --git a/memory.c b/memory.c
index b9dd6b94ca..57c44c97db 100644
--- a/memory.c
+++ b/memory.c
@@ -438,7 +438,6 @@ static MemTxResult memory_region_read_accessor(MemoryRegion *mr,
/* Accesses to code which has previously been translated into a TB show
* up in the MMIO path, as accesses to the io_mem_notdirty
* MemoryRegion. */
- trace_memory_region_tb_read(get_cpu_index(), addr, tmp, size);
} else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED) {
hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
@@ -465,7 +464,6 @@ static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
/* Accesses to code which has previously been translated into a TB show
* up in the MMIO path, as accesses to the io_mem_notdirty
* MemoryRegion. */
- trace_memory_region_tb_read(get_cpu_index(), addr, tmp, size);
} else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED) {
hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
@@ -490,7 +488,6 @@ static MemTxResult memory_region_write_accessor(MemoryRegion *mr,
/* Accesses to code which has previously been translated into a TB show
* up in the MMIO path, as accesses to the io_mem_notdirty
* MemoryRegion. */
- trace_memory_region_tb_write(get_cpu_index(), addr, tmp, size);
} else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED) {
hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
@@ -515,7 +512,6 @@ static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr,
/* Accesses to code which has previously been translated into a TB show
* up in the MMIO path, as accesses to the io_mem_notdirty
* MemoryRegion. */
- trace_memory_region_tb_write(get_cpu_index(), addr, tmp, size);
} else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED) {
hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
diff --git a/trace-events b/trace-events
index 823a4ae64e..20821ba545 100644
--- a/trace-events
+++ b/trace-events
@@ -52,14 +52,14 @@ dma_map_wait(void *dbs) "dbs=%p"
find_ram_offset(uint64_t size, uint64_t offset) "size: 0x%" PRIx64 " @ 0x%" PRIx64
find_ram_offset_loop(uint64_t size, uint64_t candidate, uint64_t offset, uint64_t next, uint64_t mingap) "trying size: 0x%" PRIx64 " @ 0x%" PRIx64 ", offset: 0x%" PRIx64" next: 0x%" PRIx64 " mingap: 0x%" PRIx64
ram_block_discard_range(const char *rbname, void *hva, size_t length, bool need_madvise, bool need_fallocate, int ret) "%s@%p + 0x%zx: madvise: %d fallocate: %d ret: %d"
+memory_notdirty_write_access(uint64_t vaddr, uint64_t ram_addr, unsigned size) "0x%" PRIx64 " ram_addr 0x%" PRIx64 " size %u"
+memory_notdirty_set_dirty(uint64_t vaddr) "0x%" PRIx64
# memory.c
memory_region_ops_read(int cpu_index, void *mr, uint64_t addr, uint64_t value, unsigned size) "cpu %d mr %p addr 0x%"PRIx64" value 0x%"PRIx64" size %u"
memory_region_ops_write(int cpu_index, void *mr, uint64_t addr, uint64_t value, unsigned size) "cpu %d mr %p addr 0x%"PRIx64" value 0x%"PRIx64" size %u"
memory_region_subpage_read(int cpu_index, void *mr, uint64_t offset, uint64_t value, unsigned size) "cpu %d mr %p offset 0x%"PRIx64" value 0x%"PRIx64" size %u"
memory_region_subpage_write(int cpu_index, void *mr, uint64_t offset, uint64_t value, unsigned size) "cpu %d mr %p offset 0x%"PRIx64" value 0x%"PRIx64" size %u"
-memory_region_tb_read(int cpu_index, uint64_t addr, uint64_t value, unsigned size) "cpu %d addr 0x%"PRIx64" value 0x%"PRIx64" size %u"
-memory_region_tb_write(int cpu_index, uint64_t addr, uint64_t value, unsigned size) "cpu %d addr 0x%"PRIx64" value 0x%"PRIx64" size %u"
memory_region_ram_device_read(int cpu_index, void *mr, uint64_t addr, uint64_t value, unsigned size) "cpu %d mr %p addr 0x%"PRIx64" value 0x%"PRIx64" size %u"
memory_region_ram_device_write(int cpu_index, void *mr, uint64_t addr, uint64_t value, unsigned size) "cpu %d mr %p addr 0x%"PRIx64" value 0x%"PRIx64" size %u"
flatview_new(void *view, void *root) "%p (root %p)"
--
2.17.1
next prev parent reply other threads:[~2019-09-18 18:08 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-18 18:02 [Qemu-devel] [RFC v2 0/5] Move notdirty handling to cputlb Richard Henderson
2019-09-18 18:02 ` [Qemu-devel] [RFC v2 1/5] cputlb: Disable __always_inline__ without optimization Richard Henderson
2019-09-19 14:36 ` David Hildenbrand
2019-09-18 18:02 ` [Qemu-devel] [RFC v2 2/5] cputlb: Replace switches in load/store_helper with callback Richard Henderson
2019-09-19 14:53 ` David Hildenbrand
2019-09-19 15:10 ` Richard Henderson
2019-09-18 18:02 ` [Qemu-devel] [RFC v2 3/5] cputlb: Introduce TLB_BSWAP Richard Henderson
2019-09-19 15:09 ` David Hildenbrand
2019-09-19 15:13 ` Richard Henderson
2019-09-18 18:02 ` Richard Henderson [this message]
2019-09-19 15:40 ` [RFC v2 4/5] exec: Adjust notdirty tracing David Hildenbrand
2019-09-18 18:02 ` [Qemu-devel] [RFC v2 5/5] cputlb: Move NOTDIRTY handling from I/O path to TLB path Richard Henderson
2019-09-19 10:27 ` [Qemu-devel] [RFC v2 0/5] Move notdirty handling to cputlb no-reply
2019-09-19 12:19 ` no-reply
2019-09-19 12:22 ` no-reply
2019-09-21 22:21 ` Richard Henderson
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