motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 15:23:53 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

plugins: implement helpers for resolving hwaddr

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

49
plugins/api.c
View file

@ -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 @@ bool qemu_plugin_mem_is_store(qemu_plugin_meminfo_t info)
* 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