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plugins: implement helpers for resolving hwaddr

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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>
This commit is contained in:
Alex Bennée 2019-06-19 20:20:08 +01:00
parent e6d86bed50
commit 235537fa73
4 changed files with 139 additions and 0 deletions
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8
include/qemu/qemu-plugin.h
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@ -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,