plugins: implement helpers for resolving hwaddr

We need to keep a local per-cpu copy of the data as other threads may
be running. Currently we can provide insight as to if the access was
IO or not and give the offset into a given device (usually the main
RAMBlock). We store enough information to get details such as the
MemoryRegion which might be useful in later expansions to the API.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h
index b9a4a4b684..c213d1dd19 100644
--- a/include/qemu/qemu-plugin.h
+++ b/include/qemu/qemu-plugin.h
@@ -285,6 +285,14 @@ bool qemu_plugin_mem_is_store(qemu_plugin_meminfo_t info);
 struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info,
                                                   uint64_t vaddr);
 
+/*
+ * The following additional queries can be run on the hwaddr structure
+ * to return information about it. For non-IO accesses the device
+ * offset will be into the appropriate block of RAM.
+ */
+bool qemu_plugin_hwaddr_is_io(struct qemu_plugin_hwaddr *hwaddr);
+uint64_t qemu_plugin_hwaddr_device_offset(const struct qemu_plugin_hwaddr *haddr);
+
 typedef void
 (*qemu_plugin_vcpu_mem_cb_t)(unsigned int vcpu_index,
                              qemu_plugin_meminfo_t info, uint64_t vaddr,