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>
diff --git a/plugins/api.c b/plugins/api.c
index facf2a1..33dac8e 100644
--- a/plugins/api.c
+++ b/plugins/api.c
@@ -42,6 +42,7 @@
#include "trace/mem-internal.h" /* mem_info macros */
#include "plugin.h"
#ifndef CONFIG_USER_ONLY
+#include "qemu/plugin-memory.h"
#include "hw/boards.h"
#endif
@@ -240,11 +241,59 @@
* Virtual Memory queries
*/
+#ifdef CONFIG_SOFTMMU
+static __thread struct qemu_plugin_hwaddr hwaddr_info;
+
+struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info,
+ uint64_t vaddr)
+{
+ CPUState *cpu = current_cpu;
+ unsigned int mmu_idx = info >> TRACE_MEM_MMU_SHIFT;
+ hwaddr_info.is_store = info & TRACE_MEM_ST;
+
+ if (!tlb_plugin_lookup(cpu, vaddr, mmu_idx,
+ info & TRACE_MEM_ST, &hwaddr_info)) {
+ error_report("invalid use of qemu_plugin_get_hwaddr");
+ return NULL;
+ }
+
+ return &hwaddr_info;
+}
+#else
struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info,
uint64_t vaddr)
{
return NULL;
}
+#endif
+
+bool qemu_plugin_hwaddr_is_io(struct qemu_plugin_hwaddr *hwaddr)
+{
+#ifdef CONFIG_SOFTMMU
+ return hwaddr->is_io;
+#else
+ return false;
+#endif
+}
+
+uint64_t qemu_plugin_hwaddr_device_offset(const struct qemu_plugin_hwaddr *haddr)
+{
+#ifdef CONFIG_SOFTMMU
+ if (haddr) {
+ if (!haddr->is_io) {
+ ram_addr_t ram_addr = qemu_ram_addr_from_host((void *) haddr->v.ram.hostaddr);
+ if (ram_addr == RAM_ADDR_INVALID) {
+ error_report("Bad ram pointer %"PRIx64"", haddr->v.ram.hostaddr);
+ abort();
+ }
+ return ram_addr;
+ } else {
+ return haddr->v.io.offset;
+ }
+ }
+#endif
+ return 0;
+}
/*
* Queries to the number and potential maximum number of vCPUs there
