the last two remaining xc_private.h users outside of libxc.
Signed-off-by: John Levon <john.levon@sun.com>
#include "xc_private.h"
-int xc_tbuf_enable(int xc_handle, int enable)
+static int tbuf_enable(int xc_handle, int enable)
{
DECLARE_DOM0_OP;
return xc_dom0_op(xc_handle, &op);
}
-int xc_tbuf_set_size(int xc_handle, uint32_t size)
+int xc_tbuf_set_size(int xc_handle, unsigned long size)
{
DECLARE_DOM0_OP;
return xc_dom0_op(xc_handle, &op);
}
-int xc_tbuf_get_size(int xc_handle, uint32_t *size)
+int xc_tbuf_get_size(int xc_handle, unsigned long *size)
{
int rc;
DECLARE_DOM0_OP;
return rc;
}
-int xc_tbuf_get_mfn(int xc_handle, unsigned long *mfn)
+int xc_tbuf_enable(int xc_handle, size_t cnt, unsigned long *mfn,
+ unsigned long *size)
{
- int rc;
DECLARE_DOM0_OP;
+ int rc;
+
+ if ( xc_tbuf_set_size(xc_handle, cnt) != 0 )
+ return -1;
+
+ if ( tbuf_enable(xc_handle, 1) != 0 )
+ return -1;
op.cmd = DOM0_TBUFCONTROL;
op.interface_version = DOM0_INTERFACE_VERSION;
rc = xc_dom0_op(xc_handle, &op);
if ( rc == 0 )
- *mfn = op.u.tbufcontrol.buffer_mfn;
- return rc;
+ {
+ *size = op.u.tbufcontrol.size;
+ *mfn = op.u.tbufcontrol.buffer_mfn;
+ }
+
+ return 0;
+}
+
+int xc_tbuf_disable(int xc_handle)
+{
+ return tbuf_enable(xc_handle, 0);
}
int xc_tbuf_set_cpu_mask(int xc_handle, uint32_t mask)
return do_dom0_op(xc_handle, &op);
}
+
*/
/**
- * This function enables or disables tracing. Trace buffer memory must
- * be already allocated by setting the size to a non-zero value, otherwise
- * tracing cannot be enabled.
+ * xc_tbuf_enable - enable tracing buffers
*
* @parm xc_handle a handle to an open hypervisor interface
- * @parm enable the desired action, 1 for enable, 0 for disable
- * @return 0 on success, -1 on failure.
+ * @parm cnt size of tracing buffers to create (in pages)
+ * @parm mfn location to store mfn of the trace buffers to
+ * @parm size location to store the size (in bytes) of a trace buffer to
+ *
+ * Gets the machine address of the trace pointer area and the size of the
+ * per CPU buffers.
+ */
+int xc_tbuf_enable(int xc_handle, size_t cnt, unsigned long *mfn,
+ unsigned long *size);
+
+/*
+ * Disable tracing buffers.
*/
-int xc_tbuf_enable(int xc_handle, int enable);
+int xc_tbuf_disable(int xc_handle);
/**
* This function sets the size of the trace buffers. Setting the size
* @parm size the size in pages per cpu for the trace buffers
* @return 0 on success, -1 on failure.
*/
-int xc_tbuf_set_size(int xc_handle, uint32_t size);
+int xc_tbuf_set_size(int xc_handle, unsigned long size);
/**
* This function retrieves the current size of the trace buffers.
* @parm size will contain the size in bytes for the trace buffers
* @return 0 on success, -1 on failure.
*/
-int xc_tbuf_get_size(int xc_handle, uint32_t *size);
-
-/**
- * This function retrieves the machine frame of the trace buffer.
-
- * @parm xc_handle a handle to an open hypervisor interface
- * @parm mfn will contain the machine frame of the buffer.
- * @return 0 on success, -1 on failure.
- */
-int xc_tbuf_get_mfn(int xc_handle, unsigned long *mfn);
+int xc_tbuf_get_size(int xc_handle, unsigned long *size);
int xc_tbuf_set_cpu_mask(int xc_handle, uint32_t mask);
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
+#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/select.h>
#include <xen/linux/evtchn.h>
-#include "xc_private.h"
+#define PERROR(_m, _a...) \
+do { \
+ int __saved_errno = errno; \
+ fprintf(stderr, "ERROR: " _m " (%d = %s)\n" , ## _a , \
+ __saved_errno, strerror(__saved_errno)); \
+ errno = __saved_errno; \
+} while (0)
+
typedef struct { int counter; } atomic_t;
#define _atomic_read(v) ((v).counter)
}
}
-void enable_tracing_or_die(int xc_handle)
-{
- int enable = 1;
- int tbsize = DEFAULT_TBUF_SIZE;
-
- if (xc_tbuf_enable(xc_handle, enable) != 0) {
- if (xc_tbuf_set_size(xc_handle, tbsize) != 0) {
- perror("set_size Hypercall failure");
- exit(1);
- }
- printf("Set default trace buffer allocation (%d pages)\n", tbsize);
- if (xc_tbuf_enable(xc_handle, enable) != 0) {
- perror("Could not enable trace buffers\n");
- exit(1);
- }
- }
- else
- printf("Tracing enabled\n");
-}
-
-void disable_tracing(void)
-{
- int enable = 0;
- int xc_handle = xc_interface_open();
-
- xc_tbuf_enable(xc_handle, enable);
- xc_interface_close(xc_handle);
-}
-
-
-/**
- * get_tbufs - get pointer to and size of the trace buffers
- * @mfn: location to store mfn of the trace buffers to
- * @size: location to store the size of a trace buffer to
- *
- * Gets the machine address of the trace pointer area and the size of the
- * per CPU buffers.
- */
-void get_tbufs(unsigned long *mfn, unsigned long *size)
+static void get_tbufs(unsigned long *mfn, unsigned long *size)
{
+ int xc_handle = xc_interface_open();
int ret;
- dom0_op_t op; /* dom0 op we'll build */
- int xc_handle = xc_interface_open(); /* for accessing control interface */
- unsigned int tbsize;
-
- enable_tracing_or_die(xc_handle);
- if (xc_tbuf_get_size(xc_handle, &tbsize) != 0) {
- perror("Failure to get tbuf info from Xen. Guess size is 0?");
- exit(1);
+ if ( xc_handle < 0 )
+ {
+ exit(EXIT_FAILURE);
}
- else
- printf("Current tbuf size: 0x%x\n", tbsize);
-
- op.cmd = DOM0_TBUFCONTROL;
- op.interface_version = DOM0_INTERFACE_VERSION;
- op.u.tbufcontrol.op = DOM0_TBUF_GET_INFO;
-
- ret = do_dom0_op(xc_handle, &op);
-
- xc_interface_close(xc_handle);
+ ret = xc_tbuf_enable(xc_handle, DEFAULT_TBUF_SIZE, mfn, size);
if ( ret != 0 )
{
- PERROR("Failure to get trace buffer pointer from Xen");
- exit(EXIT_FAILURE);
+ perror("Couldn't enable trace buffers");
+ exit(1);
}
- *mfn = op.u.tbufcontrol.buffer_mfn;
- *size = op.u.tbufcontrol.size;
+ xc_interface_close(xc_handle);
+}
+
+void disable_tracing(void)
+{
+ int xc_handle = xc_interface_open();
+ xc_tbuf_disable(xc_handle);
+ xc_interface_close(xc_handle);
}
/**
#include <xenctrl.h>
-#include "xc_private.h"
-
#define PERROR(_m, _a...) \
do { \
int __saved_errno = errno; \
}
}
-void enable_tracing_or_die(int xc_handle)
-{
- int enable = 1;
- int tbsize = DEFAULT_TBUF_SIZE;
-
- if (xc_tbuf_enable(xc_handle, enable) != 0) {
- if (xc_tbuf_set_size(xc_handle, tbsize) != 0) {
- perror("set_size Hypercall failure");
- exit(1);
- }
- printf("Set default trace buffer allocation (%d pages)\n", tbsize);
- if (xc_tbuf_enable(xc_handle, enable) != 0) {
- perror("Could not enable trace buffers\n");
- exit(1);
- }
- }
- else
- printf("Tracing enabled\n");
-}
-
-/**
- * get_tbufs - get pointer to and size of the trace buffers
- * @mfn: location to store mfn of the trace buffers to
- * @size: location to store the size of a trace buffer to
- *
- * Gets the machine address of the trace pointer area and the size of the
- * per CPU buffers.
- */
-void get_tbufs(unsigned long *mfn, unsigned long *size)
+static void get_tbufs(unsigned long *mfn, unsigned long *size)
{
+ int xc_handle = xc_interface_open();
int ret;
- dom0_op_t op; /* dom0 op we'll build */
- int xc_handle = xc_interface_open(); /* for accessing control interface */
- unsigned int tbsize;
- enable_tracing_or_die(xc_handle);
-
- if (xc_tbuf_get_size(xc_handle, &tbsize) != 0) {
- perror("Failure to get tbuf info from Xen. Guess size is 0?");
- exit(1);
+ if ( xc_handle < 0 )
+ {
+ exit(EXIT_FAILURE);
}
- else
- printf("Current tbuf size: 0x%x\n", tbsize);
-
- op.cmd = DOM0_TBUFCONTROL;
- op.interface_version = DOM0_INTERFACE_VERSION;
- op.u.tbufcontrol.op = DOM0_TBUF_GET_INFO;
-
- ret = do_dom0_op(xc_handle, &op);
-
- xc_interface_close(xc_handle);
+ ret = xc_tbuf_enable(xc_handle, DEFAULT_TBUF_SIZE, mfn, size);
if ( ret != 0 )
{
- PERROR("Failure to get trace buffer pointer from Xen");
- exit(EXIT_FAILURE);
+ perror("Couldn't enable trace buffers");
+ exit(1);
}
- *mfn = op.u.tbufcontrol.buffer_mfn;
- *size = op.u.tbufcontrol.size;
+ xc_interface_close(xc_handle);
}
/**
projects / xen.git / commitdiff