Commit 98f5559a authored by Christophe Lombard's avatar Christophe Lombard Committed by Michael Ellerman
Browse files

ocxl: Add new kernel traces 



Add specific kernel traces which provide information on mmu notifier and on
pages range.

Signed-off-by: default avatarChristophe Lombard <clombard@linux.vnet.ibm.com>
Acked-by: default avatarFrederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201125155013.39955-6-clombard@linux.vnet.ibm.com
parent 5f686eea

drivers/misc/ocxl/link.c

+4 −0
Original line number Diff line number Diff line
@@ -499,6 +499,7 @@ static void invalidate_range(struct mmu_notifier *mn, 
	unsigned long addr, pid, page_size = PAGE_SIZE;



	pid = mm->context.id;

	trace_ocxl_mmu_notifier_range(start, end, pid);



	spin_lock(&link->atsd_lock);

	for (addr = start; addr < end; addr += page_size)
@@ -590,6 +591,7 @@ int ocxl_link_add_pe(void *link_handle, int pasid, u32 pidr, u32 tidr, 
			/* Use MMIO registers for the TLB Invalidate

			 * operations.

			 */

			trace_ocxl_init_mmu_notifier(pasid, mm->context.id);

			mmu_notifier_register(&pe_data->mmu_notifier, mm);

		}

	}
@@ -725,6 +727,8 @@ int ocxl_link_remove_pe(void *link_handle, int pasid) 
	} else {

		if (pe_data->mm) {

			if (link->arva) {

				trace_ocxl_release_mmu_notifier(pasid,

								pe_data->mm->context.id);

				mmu_notifier_unregister(&pe_data->mmu_notifier,

							pe_data->mm);

				spin_lock(&link->atsd_lock);

drivers/misc/ocxl/trace.h

+64 −0
Original line number Diff line number Diff line
@@ -8,6 +8,70 @@ 


#include <linux/tracepoint.h>





TRACE_EVENT(ocxl_mmu_notifier_range,

	TP_PROTO(unsigned long start, unsigned long end, unsigned long pidr),

	TP_ARGS(start, end, pidr),



	TP_STRUCT__entry(

		__field(unsigned long, start)

		__field(unsigned long, end)

		__field(unsigned long, pidr)

	),



	TP_fast_assign(

		__entry->start = start;

		__entry->end = end;

		__entry->pidr = pidr;

	),



	TP_printk("start=0x%lx end=0x%lx pidr=0x%lx",

		__entry->start,

		__entry->end,

		__entry->pidr

	)

);



TRACE_EVENT(ocxl_init_mmu_notifier,

	TP_PROTO(int pasid, unsigned long pidr),

	TP_ARGS(pasid, pidr),



	TP_STRUCT__entry(

		__field(int, pasid)

		__field(unsigned long, pidr)

	),



	TP_fast_assign(

		__entry->pasid = pasid;

		__entry->pidr = pidr;

	),



	TP_printk("pasid=%d, pidr=0x%lx",

		__entry->pasid,

		__entry->pidr

	)

);



TRACE_EVENT(ocxl_release_mmu_notifier,

	TP_PROTO(int pasid, unsigned long pidr),

	TP_ARGS(pasid, pidr),



	TP_STRUCT__entry(

		__field(int, pasid)

		__field(unsigned long, pidr)

	),



	TP_fast_assign(

		__entry->pasid = pasid;

		__entry->pidr = pidr;

	),



	TP_printk("pasid=%d, pidr=0x%lx",

		__entry->pasid,

		__entry->pidr

	)

);



DECLARE_EVENT_CLASS(ocxl_context,

	TP_PROTO(pid_t pid, void *spa, int pasid, u32 pidr, u32 tidr),

	TP_ARGS(pid, spa, pasid, pidr, tidr),