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From: Bharata B Rao <bharata@amd.com>
To: <linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>
Cc: <Jonathan.Cameron@huawei.com>, <dave.hansen@intel.com>,
	<gourry@gourry.net>, <mgorman@techsingularity.net>,
	<mingo@redhat.com>, <peterz@infradead.org>,
	<raghavendra.kt@amd.com>, <riel@surriel.com>,
	<rientjes@google.com>, <sj@kernel.org>, <weixugc@google.com>,
	<willy@infradead.org>, <ying.huang@linux.alibaba.com>,
	<ziy@nvidia.com>, <dave@stgolabs.net>, <nifan.cxl@gmail.com>,
	<xuezhengchu@huawei.com>, <yiannis@zptcorp.com>,
	<akpm@linux-foundation.org>, <david@kernel.org>,
	<byungchul@sk.com>, <kinseyho@google.com>,
	<joshua.hahnjy@gmail.com>, <yuanchu@google.com>,
	<balbirs@nvidia.com>, <alok.rathore@samsung.com>,
	<shivankg@amd.com>, <donettom@linux.ibm.com>,
	Bharata B Rao <bharata@amd.com>
Subject: [PATCH v8 6/8] x86/ibs: Move IBS caps definitions into its own header
Date: Tue, 28 Jul 2026 11:13:54 +0530	[thread overview]
Message-ID: <20260728054356.291998-7-bharata@amd.com> (raw)
In-Reply-To: <20260728054356.291998-1-bharata@amd.com>

Subsequent patch adds IBS Memory Profiler driver that is
independent of the perf subsystem but needs the CPUID
0x8000001B capability bits. Hence move those bit definitions
out of asm/perf_event.h into a dedicated header so the new
driver can consume them without pulling in perf.

Signed-off-by: Bharata B Rao <bharata@amd.com>
---
 arch/x86/include/asm/ibs-caps.h   | 85 +++++++++++++++++++++++++++++++
 arch/x86/include/asm/perf_event.h | 81 +----------------------------
 2 files changed, 86 insertions(+), 80 deletions(-)
 create mode 100644 arch/x86/include/asm/ibs-caps.h

diff --git a/arch/x86/include/asm/ibs-caps.h b/arch/x86/include/asm/ibs-caps.h
new file mode 100644
index 000000000000..ddf6c512c8f9
--- /dev/null
+++ b/arch/x86/include/asm/ibs-caps.h
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_IBS_CAPS_H
+#define _ASM_X86_IBS_CAPS_H
+
+/*
+ * IBS cpuid feature detection
+ */
+
+#define IBS_CPUID_FEATURES		0x8000001b
+
+/*
+ * Same bit mask as for IBS cpuid feature flags (Fn8000_001B_EAX), but
+ * bit 0 is used to indicate the existence of IBS.
+ */
+#define IBS_CAPS_AVAIL			(1U<<0)
+#define IBS_CAPS_FETCHSAM		(1U<<1)
+#define IBS_CAPS_OPSAM			(1U<<2)
+#define IBS_CAPS_RDWROPCNT		(1U<<3)
+#define IBS_CAPS_OPCNT			(1U<<4)
+#define IBS_CAPS_BRNTRGT		(1U<<5)
+#define IBS_CAPS_OPCNTEXT		(1U<<6)
+#define IBS_CAPS_RIPINVALIDCHK		(1U<<7)
+#define IBS_CAPS_OPBRNFUSE		(1U<<8)
+#define IBS_CAPS_FETCHCTLEXTD		(1U<<9)
+#define IBS_CAPS_OPDATA4		(1U<<10)
+#define IBS_CAPS_ZEN4			(1U<<11)
+#define IBS_CAPS_OPLDLAT		(1U<<12)
+#define IBS_CAPS_DIS			(1U<<13)
+#define IBS_CAPS_FETCHLAT		(1U<<14)
+#define IBS_CAPS_BIT63_FILTER		(1U<<15)
+#define IBS_CAPS_STRMST_RMTSOCKET	(1U<<16)
+#define IBS_CAPS_OPDTLBPGSIZE		(1U<<19)
+
+#define IBS_CAPS_DEFAULT		(IBS_CAPS_AVAIL		\
+					 | IBS_CAPS_FETCHSAM	\
+					 | IBS_CAPS_OPSAM)
+
+/*
+ * IBS APIC setup
+ */
+#define IBSCTL				0x1cc
+#define IBSCTL_LVT_OFFSET_VALID		(1ULL<<8)
+#define IBSCTL_LVT_OFFSET_MASK		0x0F
+
+/* IBS fetch bits/masks */
+#define IBS_FETCH_L3MISSONLY		      (1ULL << 59)
+#define IBS_FETCH_RAND_EN		      (1ULL << 57)
+#define IBS_FETCH_VAL			      (1ULL << 49)
+#define IBS_FETCH_ENABLE		      (1ULL << 48)
+#define IBS_FETCH_CNT			     0xFFFF0000ULL
+#define IBS_FETCH_MAX_CNT		     0x0000FFFFULL
+
+#define IBS_FETCH_2_DIS			      (1ULL <<  0)
+#define IBS_FETCH_2_FETCHLAT_FILTER	    (0xFULL <<  1)
+#define IBS_FETCH_2_FETCHLAT_FILTER_SHIFT	       (1)
+#define IBS_FETCH_2_EXCL_RIP_63_EQ_1	      (1ULL <<  5)
+#define IBS_FETCH_2_EXCL_RIP_63_EQ_0	      (1ULL <<  6)
+
+/*
+ * IBS op bits/masks
+ * The lower 7 bits of the current count are random bits
+ * preloaded by hardware and ignored in software
+ */
+#define IBS_OP_LDLAT_EN			      (1ULL << 63)
+#define IBS_OP_LDLAT_THRSH		    (0xFULL << 59)
+#define IBS_OP_LDLAT_THRSH_SHIFT		      (59)
+#define IBS_OP_CUR_CNT			(0xFFF80ULL << 32)
+#define IBS_OP_CUR_CNT_RAND		(0x0007FULL << 32)
+#define IBS_OP_CUR_CNT_EXT_MASK		   (0x7FULL << 52)
+#define IBS_OP_CNT_CTL			      (1ULL << 19)
+#define IBS_OP_VAL			      (1ULL << 18)
+#define IBS_OP_ENABLE			      (1ULL << 17)
+#define IBS_OP_L3MISSONLY		      (1ULL << 16)
+#define IBS_OP_MAX_CNT			     0x0000FFFFULL
+#define IBS_OP_MAX_CNT_EXT		     0x007FFFFFULL	/* not a register bit mask */
+#define IBS_OP_MAX_CNT_EXT_MASK		   (0x7FULL << 20)	/* separate upper 7 bits */
+#define IBS_RIP_INVALID			      (1ULL << 38)
+
+#define IBS_OP_2_DIS			      (1ULL <<  0)
+#define IBS_OP_2_EXCL_RIP_63_EQ_0	      (1ULL <<  1)
+#define IBS_OP_2_EXCL_RIP_63_EQ_1	      (1ULL <<  2)
+#define IBS_OP_2_STRM_ST_FILTER		      (1ULL <<  3)
+#define IBS_OP_2_STRM_ST_FILTER_SHIFT		       (3)
+
+#endif /*  _ASM_X86_IBS_CAPS_H */
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 1eb13673e889..de18e63c5c3e 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -3,6 +3,7 @@
 #define _ASM_X86_PERF_EVENT_H
 
 #include <linux/static_call.h>
+#include <asm/ibs-caps.h>
 
 /*
  * Performance event hw details:
@@ -622,86 +623,6 @@ struct arch_pebs_cntr_header {
  */
 #define EXT_PERFMON_DEBUG_FEATURES		0x80000022
 
-/*
- * IBS cpuid feature detection
- */
-
-#define IBS_CPUID_FEATURES		0x8000001b
-
-/*
- * Same bit mask as for IBS cpuid feature flags (Fn8000_001B_EAX), but
- * bit 0 is used to indicate the existence of IBS.
- */
-#define IBS_CAPS_AVAIL			(1U<<0)
-#define IBS_CAPS_FETCHSAM		(1U<<1)
-#define IBS_CAPS_OPSAM			(1U<<2)
-#define IBS_CAPS_RDWROPCNT		(1U<<3)
-#define IBS_CAPS_OPCNT			(1U<<4)
-#define IBS_CAPS_BRNTRGT		(1U<<5)
-#define IBS_CAPS_OPCNTEXT		(1U<<6)
-#define IBS_CAPS_RIPINVALIDCHK		(1U<<7)
-#define IBS_CAPS_OPBRNFUSE		(1U<<8)
-#define IBS_CAPS_FETCHCTLEXTD		(1U<<9)
-#define IBS_CAPS_OPDATA4		(1U<<10)
-#define IBS_CAPS_ZEN4			(1U<<11)
-#define IBS_CAPS_OPLDLAT		(1U<<12)
-#define IBS_CAPS_DIS			(1U<<13)
-#define IBS_CAPS_FETCHLAT		(1U<<14)
-#define IBS_CAPS_BIT63_FILTER		(1U<<15)
-#define IBS_CAPS_STRMST_RMTSOCKET	(1U<<16)
-#define IBS_CAPS_OPDTLBPGSIZE		(1U<<19)
-
-#define IBS_CAPS_DEFAULT		(IBS_CAPS_AVAIL		\
-					 | IBS_CAPS_FETCHSAM	\
-					 | IBS_CAPS_OPSAM)
-
-/*
- * IBS APIC setup
- */
-#define IBSCTL				0x1cc
-#define IBSCTL_LVT_OFFSET_VALID		(1ULL<<8)
-#define IBSCTL_LVT_OFFSET_MASK		0x0F
-
-/* IBS fetch bits/masks */
-#define IBS_FETCH_L3MISSONLY		      (1ULL << 59)
-#define IBS_FETCH_RAND_EN		      (1ULL << 57)
-#define IBS_FETCH_VAL			      (1ULL << 49)
-#define IBS_FETCH_ENABLE		      (1ULL << 48)
-#define IBS_FETCH_CNT			     0xFFFF0000ULL
-#define IBS_FETCH_MAX_CNT		     0x0000FFFFULL
-
-#define IBS_FETCH_2_DIS			      (1ULL <<  0)
-#define IBS_FETCH_2_FETCHLAT_FILTER	    (0xFULL <<  1)
-#define IBS_FETCH_2_FETCHLAT_FILTER_SHIFT	       (1)
-#define IBS_FETCH_2_EXCL_RIP_63_EQ_1	      (1ULL <<  5)
-#define IBS_FETCH_2_EXCL_RIP_63_EQ_0	      (1ULL <<  6)
-
-/*
- * IBS op bits/masks
- * The lower 7 bits of the current count are random bits
- * preloaded by hardware and ignored in software
- */
-#define IBS_OP_LDLAT_EN			      (1ULL << 63)
-#define IBS_OP_LDLAT_THRSH		    (0xFULL << 59)
-#define IBS_OP_LDLAT_THRSH_SHIFT		      (59)
-#define IBS_OP_CUR_CNT			(0xFFF80ULL << 32)
-#define IBS_OP_CUR_CNT_RAND		(0x0007FULL << 32)
-#define IBS_OP_CUR_CNT_EXT_MASK		   (0x7FULL << 52)
-#define IBS_OP_CNT_CTL			      (1ULL << 19)
-#define IBS_OP_VAL			      (1ULL << 18)
-#define IBS_OP_ENABLE			      (1ULL << 17)
-#define IBS_OP_L3MISSONLY		      (1ULL << 16)
-#define IBS_OP_MAX_CNT			     0x0000FFFFULL
-#define IBS_OP_MAX_CNT_EXT		     0x007FFFFFULL	/* not a register bit mask */
-#define IBS_OP_MAX_CNT_EXT_MASK		   (0x7FULL << 20)	/* separate upper 7 bits */
-#define IBS_RIP_INVALID			      (1ULL << 38)
-
-#define IBS_OP_2_DIS			      (1ULL <<  0)
-#define IBS_OP_2_EXCL_RIP_63_EQ_0	      (1ULL <<  1)
-#define IBS_OP_2_EXCL_RIP_63_EQ_1	      (1ULL <<  2)
-#define IBS_OP_2_STRM_ST_FILTER		      (1ULL <<  3)
-#define IBS_OP_2_STRM_ST_FILTER_SHIFT		       (3)
-
 #ifdef CONFIG_X86_LOCAL_APIC
 extern u32 get_ibs_caps(void);
 extern int forward_event_to_ibs(struct perf_event *event);
-- 
2.34.1



  parent reply	other threads:[~2026-07-28  5:45 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-28  5:43 [PATCH v8 0/8] mm: Hot page tracking and promotion infrastructure Bharata B Rao
2026-07-28  5:43 ` [PATCH v8 1/8] mm: migrate: Allow misplaced migration without VMA Bharata B Rao
2026-07-28  5:43 ` [PATCH v8 2/8] mm: migrate: Add promote_misplaced_memcg_folios() Bharata B Rao
2026-07-28  5:43 ` [PATCH v8 3/8] mm: Hot page tracking and promotion - pghot Bharata B Rao
2026-07-28  5:43 ` [PATCH v8 4/8] mm: pghot: Precision mode for pghot Bharata B Rao
2026-07-28  5:43 ` [PATCH v8 5/8] mm: sched: move NUMA balancing tiering promotion to pghot Bharata B Rao
2026-07-28  5:43 ` Bharata B Rao [this message]
2026-07-28  5:43 ` [PATCH v8 7/8] x86/mm/ibs: In-kernel driver for AMD IBS Memory Profiler Bharata B Rao
2026-07-28  5:43 ` [PATCH v8 8/8] x86/mm/ibs: Add runtime controls for IBS memprofiler Bharata B Rao
2026-07-28  5:55 ` [PATCH v8 0/8] mm: Hot page tracking and promotion infrastructure - microbenchmark numbers Bharata B Rao
2026-07-28  5:59 ` [PATCH v8 0/8] mm: Hot page tracking and promotion infrastructure - NAS BT Bharata B Rao
2026-07-28  6:02 ` [PATCH v8 0/8] mm: Hot page tracking and promotion infrastructure - Graph500 Bharata B Rao
2026-07-28  6:05 ` [PATCH v8 0/8] mm: Hot page tracking and promotion infrastructure - redis-memtier Bharata B Rao
2026-07-28  6:17 ` [PATCH v8 0/8] mm: Hot page tracking and promotion infrastructure - llama-bench Bharata B Rao

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