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plugins: add API to return a name for a IO device 

This may well end up being anonymous but it should always be unique.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Clement Deschamps <clement.deschamps@greensocs.com>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210213130325.14781-3-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2021-02-13 13:03:04 +00:00
parent b74259e3de
commit b853a79f65
2 changed files with 26 additions and 0 deletions
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6
include/qemu/qemu-plugin.h
View File

@ -330,6 +330,12 @@ struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info,
bool qemu_plugin_hwaddr_is_io(const struct qemu_plugin_hwaddr *haddr);
uint64_t qemu_plugin_hwaddr_device_offset(const struct qemu_plugin_hwaddr *haddr);
/*
* Returns a string representing the device. The string is valid for
* the lifetime of the plugin.
*/
const char *qemu_plugin_hwaddr_device_name(const struct qemu_plugin_hwaddr *h);
typedef void
(*qemu_plugin_vcpu_mem_cb_t)(unsigned int vcpu_index,
qemu_plugin_meminfo_t info, uint64_t vaddr,

20
plugins/api.c
View File

@ -303,6 +303,26 @@ uint64_t qemu_plugin_hwaddr_device_offset(const struct qemu_plugin_hwaddr *haddr
return 0;
}
const char *qemu_plugin_hwaddr_device_name(const struct qemu_plugin_hwaddr *h)
{
#ifdef CONFIG_SOFTMMU
if (h && h->is_io) {
MemoryRegionSection *mrs = h->v.io.section;
if (!mrs->mr->name) {
unsigned long maddr = 0xffffffff & (uintptr_t) mrs->mr;
g_autofree char *temp = g_strdup_printf("anon%08lx", maddr);
return g_intern_string(temp);
} else {
return g_intern_string(mrs->mr->name);
}
} else {
return g_intern_static_string("RAM");
}
#else
return g_intern_static_string("Invalid");
#endif
}
/*
* Queries to the number and potential maximum number of vCPUs there
* will be. This helps the plugin dimension per-vcpu arrays.