linux-kernel - [tip: perf/core] perf/x86/intel/uncore: Add Sapphire Rapids server UPI support

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Date:   Mon, 05 Jul 2021 07:53:42 -0000
From:   "tip-bot2 for Kan Liang" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Kan Liang <kan.liang@...ux.intel.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Andi Kleen <ak@...ux.intel.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: perf/core] perf/x86/intel/uncore: Add Sapphire Rapids server
 UPI support

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     da5a9156cd2a3be2b00f8defb529ee3e35e5769b
Gitweb:        https://git.kernel.org/tip/da5a9156cd2a3be2b00f8defb529ee3e35e5769b
Author:        Kan Liang <kan.liang@...ux.intel.com>
AuthorDate:    Wed, 30 Jun 2021 14:08:33 -07:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Fri, 02 Jul 2021 15:58:39 +02:00

perf/x86/intel/uncore: Add Sapphire Rapids server UPI support

Sapphire Rapids uses a coherent interconnect for scaling to multiple
sockets known as Intel UPI. Intel UPI technology provides a cache
coherent socket to socket external communication interface between
processors.

The layout of the control registers for a UPI uncore unit is similar to
a M2M uncore unit.

Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Andi Kleen <ak@...ux.intel.com>
Link: https://lore.kernel.org/r/1625087320-194204-10-git-send-email-kan.liang@linux.intel.com
---
 arch/x86/events/intel/uncore_snbep.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c
index 72ba8d4..20045ba 100644
--- a/arch/x86/events/intel/uncore_snbep.c
+++ b/arch/x86/events/intel/uncore_snbep.c
@@ -5698,6 +5698,11 @@ static struct intel_uncore_type spr_uncore_m2m = {
 	.name			= "m2m",
 };
 
+static struct intel_uncore_type spr_uncore_upi = {
+	SPR_UNCORE_PCI_COMMON_FORMAT(),
+	.name			= "upi",
+};
+
 #define UNCORE_SPR_NUM_UNCORE_TYPES		12
 
 static struct intel_uncore_type *spr_uncores[UNCORE_SPR_NUM_UNCORE_TYPES] = {
@@ -5709,7 +5714,7 @@ static struct intel_uncore_type *spr_uncores[UNCORE_SPR_NUM_UNCORE_TYPES] = {
 	NULL,
 	&spr_uncore_imc,
 	&spr_uncore_m2m,
-	NULL,
+	&spr_uncore_upi,
 	NULL,
 	NULL,
 	NULL,