motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 00:03:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

trace: include CPU index in trace_memory_region_*()

Browse source 
Knowing which CPU performed an action is essential for understanding SMP guest
behavior.

However, cpu_physical_memory_rw() may be executed by a machine init function,
before any VCPUs are running, when there is no CPU running ('current_cpu' is
NULL). In this case, store -1 in the trace record as the CPU index. Trace
analysis tools may need to be aware of this special case.

Signed-off-by: Hollis Blanchard <hollis_blanchard@mentor.com>
Message-id: 1456949575-1633-1-git-send-email-hollis_blanchard@mentor.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Hollis Blanchard 2016-03-02 12:12:54 -08:00 • committed by Stefan Hajnoczi
parent a648c13738
commit 5a68be94ac
2 changed files with 24 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

32
memory.c
View file

@ -386,6 +386,14 @@ static hwaddr memory_region_to_absolute_addr(MemoryRegion *mr, hwaddr offset)
return abs_addr;
}
static int get_cpu_index(void)
{
if (current_cpu) {
return current_cpu->cpu_index;
}
return -1;
}
static MemTxResult memory_region_oldmmio_read_accessor(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
@ -398,10 +406,10 @@ static MemTxResult memory_region_oldmmio_read_accessor(MemoryRegion *mr,
tmp = mr->ops->old_mmio.read[ctz32(size)](mr->opaque, addr);
if (mr->subpage) {
trace_memory_region_subpage_read(mr, addr, tmp, size);
trace_memory_region_subpage_read(get_cpu_index(), mr, 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(mr, abs_addr, tmp, size);
trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
}
*value |= (tmp & mask) << shift;
return MEMTX_OK;
@ -419,10 +427,10 @@ static MemTxResult memory_region_read_accessor(MemoryRegion *mr,
tmp = mr->ops->read(mr->opaque, addr, size);
if (mr->subpage) {
trace_memory_region_subpage_read(mr, addr, tmp, size);
trace_memory_region_subpage_read(get_cpu_index(), mr, 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(mr, abs_addr, tmp, size);
trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
}
*value |= (tmp & mask) << shift;
return MEMTX_OK;
@ -441,10 +449,10 @@ static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
r = mr->ops->read_with_attrs(mr->opaque, addr, &tmp, size, attrs);
if (mr->subpage) {
trace_memory_region_subpage_read(mr, addr, tmp, size);
trace_memory_region_subpage_read(get_cpu_index(), mr, 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(mr, abs_addr, tmp, size);
trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
}
*value |= (tmp & mask) << shift;
return r;
@ -462,10 +470,10 @@ static MemTxResult memory_region_oldmmio_write_accessor(MemoryRegion *mr,
tmp = (*value >> shift) & mask;
if (mr->subpage) {
trace_memory_region_subpage_write(mr, addr, tmp, size);
trace_memory_region_subpage_write(get_cpu_index(), mr, 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(mr, abs_addr, tmp, size);
trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
}
mr->ops->old_mmio.write[ctz32(size)](mr->opaque, addr, tmp);
return MEMTX_OK;
@ -483,10 +491,10 @@ static MemTxResult memory_region_write_accessor(MemoryRegion *mr,
tmp = (*value >> shift) & mask;
if (mr->subpage) {
trace_memory_region_subpage_write(mr, addr, tmp, size);
trace_memory_region_subpage_write(get_cpu_index(), mr, 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(mr, abs_addr, tmp, size);
trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
}
mr->ops->write(mr->opaque, addr, tmp, size);
return MEMTX_OK;
@ -504,10 +512,10 @@ static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr,
tmp = (*value >> shift) & mask;
if (mr->subpage) {
trace_memory_region_subpage_write(mr, addr, tmp, size);
trace_memory_region_subpage_write(get_cpu_index(), mr, 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(mr, abs_addr, tmp, size);
trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
}
return mr->ops->write_with_attrs(mr->opaque, addr, tmp, size, attrs);
}