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[PATCH v1 2/4] plugins: add API to return a name for a IO device
From: |
Alex Bennée |
Subject: |
[PATCH v1 2/4] plugins: add API to return a name for a IO device |
Date: |
Fri, 4 Sep 2020 14:40:05 +0100 |
This may well end up being anonymous but it should always be unique.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
[r-b provisional given change to g_intern_string]
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: <20200713200415.26214-11-alex.bennee@linaro.org>
---
include/qemu/qemu-plugin.h | 6 ++++++
plugins/api.c | 20 ++++++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h
index bab8b0d4b3a..c98c18d6b05 100644
--- a/include/qemu/qemu-plugin.h
+++ b/include/qemu/qemu-plugin.h
@@ -335,6 +335,12 @@ 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,
diff --git a/plugins/api.c b/plugins/api.c
index bbdc5a4eb46..4304e63f0cf 100644
--- a/plugins/api.c
+++ b/plugins/api.c
@@ -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_string("RAM");
+ }
+#else
+ return g_intern_string("Invalid");
+#endif
+}
+
/*
* Queries to the number and potential maximum number of vCPUs there
* will be. This helps the plugin dimension per-vcpu arrays.
--
2.20.1