powerpc/vas: Add a couple of trace points

Add a couple of trace points in the VAS driver

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
[mpe: Add SPDX tag to new header]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/platforms/powernv/vas-trace.h b/arch/powerpc/platforms/powernv/vas-trace.h
new file mode 100644 (file)
index 0000000..a449b9f
--- /dev/null
+++ b/arch/powerpc/platforms/powernv/vas-trace.h
@@ -0,0 +1,113 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM   vas
+
+#if !defined(_VAS_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+
+#define _VAS_TRACE_H
+#include <linux/tracepoint.h>
+#include <linux/sched.h>
+#include <asm/vas.h>
+
+TRACE_EVENT(   vas_rx_win_open,
+
+               TP_PROTO(struct task_struct *tsk,
+                        int vasid,
+                        int cop,
+                        struct vas_rx_win_attr *rxattr),
+
+               TP_ARGS(tsk, vasid, cop, rxattr),
+
+               TP_STRUCT__entry(
+                       __field(struct task_struct *, tsk)
+                       __field(int, pid)
+                       __field(int, cop)
+                       __field(int, vasid)
+                       __field(struct vas_rx_win_attr *, rxattr)
+                       __field(int, lnotify_lpid)
+                       __field(int, lnotify_pid)
+                       __field(int, lnotify_tid)
+               ),
+
+               TP_fast_assign(
+                       __entry->pid = tsk->pid;
+                       __entry->vasid = vasid;
+                       __entry->cop = cop;
+                       __entry->lnotify_lpid = rxattr->lnotify_lpid;
+                       __entry->lnotify_pid = rxattr->lnotify_pid;
+                       __entry->lnotify_tid = rxattr->lnotify_tid;
+               ),
+
+               TP_printk("pid=%d, vasid=%d, cop=%d, lpid=%d, pid=%d, tid=%d",
+                       __entry->pid, __entry->vasid, __entry->cop,
+                       __entry->lnotify_lpid, __entry->lnotify_pid,
+                       __entry->lnotify_tid)
+);
+
+TRACE_EVENT(   vas_tx_win_open,
+
+               TP_PROTO(struct task_struct *tsk,
+                        int vasid,
+                        int cop,
+                        struct vas_tx_win_attr *txattr),
+
+               TP_ARGS(tsk, vasid, cop, txattr),
+
+               TP_STRUCT__entry(
+                       __field(struct task_struct *, tsk)
+                       __field(int, pid)
+                       __field(int, cop)
+                       __field(int, vasid)
+                       __field(struct vas_tx_win_attr *, txattr)
+                       __field(int, lpid)
+                       __field(int, pidr)
+               ),
+
+               TP_fast_assign(
+                       __entry->pid = tsk->pid;
+                       __entry->vasid = vasid;
+                       __entry->cop = cop;
+                       __entry->lpid = txattr->lpid;
+                       __entry->pidr = txattr->pidr;
+               ),
+
+               TP_printk("pid=%d, vasid=%d, cop=%d, lpid=%d, pidr=%d",
+                       __entry->pid, __entry->vasid, __entry->cop,
+                       __entry->lpid, __entry->pidr)
+);
+
+TRACE_EVENT(   vas_paste_crb,
+
+               TP_PROTO(struct task_struct *tsk,
+                       struct vas_window *win),
+
+               TP_ARGS(tsk, win),
+
+               TP_STRUCT__entry(
+                       __field(struct task_struct *, tsk)
+                       __field(struct vas_window *, win)
+                       __field(int, pid)
+                       __field(int, vasid)
+                       __field(int, winid)
+                       __field(unsigned long, paste_kaddr)
+               ),
+
+               TP_fast_assign(
+                       __entry->pid = tsk->pid;
+                       __entry->vasid = win->vinst->vas_id;
+                       __entry->winid = win->winid;
+                       __entry->paste_kaddr = (unsigned long)win->paste_kaddr
+               ),
+
+               TP_printk("pid=%d, vasid=%d, winid=%d, paste_kaddr=0x%016lx\n",
+                       __entry->pid, __entry->vasid, __entry->winid,
+                       __entry->paste_kaddr)
+);
+
+#endif /* _VAS_TRACE_H */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH ../../arch/powerpc/platforms/powernv
+#define TRACE_INCLUDE_FILE vas-trace
+#include <trace/define_trace.h>

diff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c
index b7c53a51c31bbe5ba5fa62adbf6d1e97c3c1e8c3..ff9f488123310b0503dcb1b139af6d3ee4afe567 100644 (file)
--- a/arch/powerpc/platforms/powernv/vas-window.c
+++ b/arch/powerpc/platforms/powernv/vas-window.c
@@ -21,6 +21,9 @@
 #include "vas.h"
 #include "copy-paste.h"
 
+#define CREATE_TRACE_POINTS
+#include "vas-trace.h"
+
 /*
  * Compute the paste address region for the window @window using the
  * ->paste_base_addr and ->paste_win_id_shift we got from device tree.
@@ -880,6 +883,8 @@ struct vas_window *vas_rx_win_open(int vasid, enum vas_cop_type cop,
        struct vas_winctx winctx;
        struct vas_instance *vinst;
 
+       trace_vas_rx_win_open(current, vasid, cop, rxattr);
+
        if (!rx_win_args_valid(cop, rxattr))
                return ERR_PTR(-EINVAL);
 
@@ -1008,6 +1013,8 @@ struct vas_window *vas_tx_win_open(int vasid, enum vas_cop_type cop,
        struct vas_winctx winctx;
        struct vas_instance *vinst;
 
+       trace_vas_tx_win_open(current, vasid, cop, attr);
+
        if (!tx_win_args_valid(cop, attr))
                return ERR_PTR(-EINVAL);
 
@@ -1100,6 +1107,8 @@ int vas_paste_crb(struct vas_window *txwin, int offset, bool re)
        void *addr;
        uint64_t val;
 
+       trace_vas_paste_crb(current, txwin);
+
        /*
         * Only NX windows are supported for now and hardware assumes
         * report-enable flag is set for NX windows. Ensure software