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Commit 51563a0e authored by Robert Richter's avatar Robert Richter
Browse files

x86/oprofile: introduce oprofile_add_data64() 



The IBS implemention writes 64 bit register values to the cpu buffer
by writing two 32 values using oprofile_add_data(). This patch
introduces oprofile_add_data64() to write a single 64 bit value to the
buffer.

Signed-off-by: default avatarRobert Richter <robert.richter@amd.com>
parent c572ae4e

arch/x86/oprofile/op_model_amd.c

+9 −18
Original line number Diff line number Diff line
@@ -140,13 +140,10 @@ op_amd_handle_ibs(struct pt_regs * const regs, 
			rdmsrl(MSR_AMD64_IBSFETCHLINAD, val);

			oprofile_write_reserve(&entry, regs, val,

					       IBS_FETCH_CODE, IBS_FETCH_SIZE);

			oprofile_add_data(&entry, (u32)val);

			oprofile_add_data(&entry, (u32)(val >> 32));

			oprofile_add_data(&entry, (u32)ctl);

			oprofile_add_data(&entry, (u32)(ctl >> 32));

			oprofile_add_data64(&entry, val);

			oprofile_add_data64(&entry, ctl);

			rdmsrl(MSR_AMD64_IBSFETCHPHYSAD, val);

			oprofile_add_data(&entry, (u32)val);

			oprofile_add_data(&entry, (u32)(val >> 32));

			oprofile_add_data64(&entry, val);

			oprofile_write_commit(&entry);



			/* reenable the IRQ */
@@ -162,23 +159,17 @@ op_amd_handle_ibs(struct pt_regs * const regs, 
			rdmsrl(MSR_AMD64_IBSOPRIP, val);

			oprofile_write_reserve(&entry, regs, val,

					       IBS_OP_CODE, IBS_OP_SIZE);

			oprofile_add_data(&entry, (u32)val);

			oprofile_add_data(&entry, (u32)(val >> 32));

			oprofile_add_data64(&entry, val);

			rdmsrl(MSR_AMD64_IBSOPDATA, val);

			oprofile_add_data(&entry, (u32)val);

			oprofile_add_data(&entry, (u32)(val >> 32));

			oprofile_add_data64(&entry, val);

			rdmsrl(MSR_AMD64_IBSOPDATA2, val);

			oprofile_add_data(&entry, (u32)val);

			oprofile_add_data(&entry, (u32)(val >> 32));

			oprofile_add_data64(&entry, val);

			rdmsrl(MSR_AMD64_IBSOPDATA3, val);

			oprofile_add_data(&entry, (u32)val);

			oprofile_add_data(&entry, (u32)(val >> 32));

			oprofile_add_data64(&entry, val);

			rdmsrl(MSR_AMD64_IBSDCLINAD, val);

			oprofile_add_data(&entry, (u32)val);

			oprofile_add_data(&entry, (u32)(val >> 32));

			oprofile_add_data64(&entry, val);

			rdmsrl(MSR_AMD64_IBSDCPHYSAD, val);

			oprofile_add_data(&entry, (u32)val);

			oprofile_add_data(&entry, (u32)(val >> 32));

			oprofile_add_data64(&entry, val);

			oprofile_write_commit(&entry);



			/* reenable the IRQ */

drivers/oprofile/cpu_buffer.c

+15 −0
Original line number Diff line number Diff line
@@ -406,6 +406,21 @@ int oprofile_add_data(struct op_entry *entry, unsigned long val) 
	return op_cpu_buffer_add_data(entry, val);

}



int oprofile_add_data64(struct op_entry *entry, u64 val)

{

	if (!entry->event)

		return 0;

	if (op_cpu_buffer_get_size(entry) < 2)

		/*

		 * the function returns 0 to indicate a too small

		 * buffer, even if there is some space left

		 */

		return 0;

	if (!op_cpu_buffer_add_data(entry, (u32)val))

		return 0;

	return op_cpu_buffer_add_data(entry, (u32)(val >> 32));

}



int oprofile_write_commit(struct op_entry *entry)

{

	if (!entry->event)

include/linux/oprofile.h

+1 −0
Original line number Diff line number Diff line
@@ -179,6 +179,7 @@ void oprofile_write_reserve(struct op_entry *entry, 
			    struct pt_regs * const regs,

			    unsigned long pc, int code, int size);

int oprofile_add_data(struct op_entry *entry, unsigned long val);

int oprofile_add_data64(struct op_entry *entry, u64 val);

int oprofile_write_commit(struct op_entry *entry);



#endif /* OPROFILE_H */