linux-kernel - [tip: perf/core] perf/x86/intel/uncore: Support customized MMIO map size

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Message-ID: <175206209517.406.12248444876013066902.tip-bot2@tip-bot2>
Date: Wed, 09 Jul 2025 11:54:55 -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>,
 Dapeng Mi <dapeng1.mi@...ux.intel.com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject:
 [tip: perf/core] perf/x86/intel/uncore: Support customized MMIO map size

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

Commit-ID:     fca24bf2b6b619770d7f1222c0284791d7766239
Gitweb:        https://git.kernel.org/tip/fca24bf2b6b619770d7f1222c0284791d7766239
Author:        Kan Liang <kan.liang@...ux.intel.com>
AuthorDate:    Mon, 07 Jul 2025 13:17:48 -07:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 09 Jul 2025 13:40:19 +02:00

perf/x86/intel/uncore: Support customized MMIO map size

For a server platform, the MMIO map size is always 0x4000. However, a
client platform may have a smaller map size.

Make the map size customizable.

Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Dapeng Mi <dapeng1.mi@...ux.intel.com>
Link: https://lore.kernel.org/r/20250707201750.616527-3-kan.liang@linux.intel.com
---
 arch/x86/events/intel/uncore_discovery.c | 2 +-
 arch/x86/events/intel/uncore_snbep.c     | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/events/intel/uncore_discovery.c b/arch/x86/events/intel/uncore_discovery.c
index 9a78a31..7d57ce7 100644
--- a/arch/x86/events/intel/uncore_discovery.c
+++ b/arch/x86/events/intel/uncore_discovery.c
@@ -651,7 +651,7 @@ void intel_generic_uncore_mmio_init_box(struct intel_uncore_box *box)
 	}
 
 	addr = unit->addr;
-	box->io_addr = ioremap(addr, UNCORE_GENERIC_MMIO_SIZE);
+	box->io_addr = ioremap(addr, type->mmio_map_size);
 	if (!box->io_addr) {
 		pr_warn("Uncore type %d box %d: ioremap error for 0x%llx.\n",
 			type->type_id, unit->id, (unsigned long long)addr);
diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c
index 2824dc9..3a65431 100644
--- a/arch/x86/events/intel/uncore_snbep.c
+++ b/arch/x86/events/intel/uncore_snbep.c
@@ -6409,6 +6409,8 @@ static void uncore_type_customized_copy(struct intel_uncore_type *to_type,
 		to_type->get_topology = from_type->get_topology;
 	if (from_type->cleanup_mapping)
 		to_type->cleanup_mapping = from_type->cleanup_mapping;
+	if (from_type->mmio_map_size)
+		to_type->mmio_map_size = from_type->mmio_map_size;
 }
 
 static struct intel_uncore_type **