From 5a68be94ac12472eb49fa267de9fb12168224298 Mon Sep 17 00:00:00 2001 From: Hollis Blanchard Date: Wed, 2 Mar 2016 12:12:54 -0800 Subject: trace: include CPU index in trace_memory_region_*() 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 Message-id: 1456949575-1633-1-git-send-email-hollis_blanchard@mentor.com Signed-off-by: Stefan Hajnoczi --- memory.c | 32 ++++++++++++++++++++------------ 1 file changed, 20 insertions(+), 12 deletions(-) (limited to 'memory.c') diff --git a/memory.c b/memory.c index 9f5c4584d1..07a5236eb4 100644 --- a/memory.c +++ b/memory.c @@ -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); } -- cgit v1.2.3