[PATCH] perf/x86/intel/pt: Update topa_entry base len to support 52-bit physical addresses

[Marco Cavenati]

Increase topa_entry base to 40 bits to accommodate page addresses in
systems with 52-bit physical addresses.
The Base Physical Address field (base) has a length of MAXPHYADDR - 12 as
stated in Intel's SDM chapter 33.2.7.2.
The maximum MAXPHYADDR is 52 as stated in SDM 4.1.4.
Therefore, the maximum base bit length is 40.

Signed-off-by: Marco Cavenati <cavenati.marco@xxxxxxxxx>
---
 arch/x86/events/intel/pt.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/events/intel/pt.h b/arch/x86/events/intel/pt.h
index 96906a62aacd..f5e46c04c145 100644
--- a/arch/x86/events/intel/pt.h
+++ b/arch/x86/events/intel/pt.h
@@ -33,8 +33,8 @@ struct topa_entry {
 	u64	rsvd2	: 1;
 	u64	size	: 4;
 	u64	rsvd3	: 2;
-	u64	base	: 36;
-	u64	rsvd4	: 16;
+	u64	base	: 40;
+	u64	rsvd4	: 12;
 };
 
 /* TSC to Core Crystal Clock Ratio */
-- 
2.39.2