The following commit has been merged into the x86/cache branch of tip:
Commit-ID: 8dd97c65185c5a63c668e5bd8a861c04f47a35ed
Gitweb: https://git.kernel.org/tip/8dd97c65185c5a63c668e5bd8a861c04f47a35ed
Author: Reinette Chatre <reinette.chatre@xxxxxxxxx>
AuthorDate: Tue, 05 May 2020 15:36:12 -07:00
Committer: Borislav Petkov <bp@xxxxxxx>
CommitterDate: Wed, 06 May 2020 17:45:22 +02:00
x86/resctrl: Rename asm/resctrl_sched.h to asm/resctrl.h
asm/resctrl_sched.h is dedicated to the code used for configuration
of the CPU resource control state when a task is scheduled.
Rename resctrl_sched.h to resctrl.h in preparation of additions that
will no longer make this file dedicated to work done during scheduling.
No functional change.
Suggested-by: Borislav Petkov <bp@xxxxxxx>
Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Link: https://lkml.kernel.org/r/6914e0ef880b539a82a6d889f9423496d471ad1d.1588715690.git.reinette.chatre@xxxxxxxxx
---
MAINTAINERS | 2 +-
arch/x86/include/asm/resctrl.h | 93 ++++++++++++++++++++++-
arch/x86/include/asm/resctrl_sched.h | 93 +----------------------
arch/x86/kernel/cpu/resctrl/core.c | 2 +-
arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 2 +-
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 2 +-
arch/x86/kernel/process_32.c | 2 +-
arch/x86/kernel/process_64.c | 2 +-
8 files changed, 99 insertions(+), 99 deletions(-)
create mode 100644 arch/x86/include/asm/resctrl.h
delete mode 100644 arch/x86/include/asm/resctrl_sched.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 2926327..ecfb07a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14227,7 +14227,7 @@ M: Reinette Chatre <reinette.chatre@xxxxxxxxx>
L: linux-kernel@xxxxxxxxxxxxxxx
S: Supported
F: Documentation/x86/resctrl*
-F: arch/x86/include/asm/resctrl_sched.h
+F: arch/x86/include/asm/resctrl.h
F: arch/x86/kernel/cpu/resctrl/
F: tools/testing/selftests/resctrl/
diff --git a/arch/x86/include/asm/resctrl.h b/arch/x86/include/asm/resctrl.h
new file mode 100644
index 0000000..99b5728
--- /dev/null
+++ b/arch/x86/include/asm/resctrl.h
@@ -0,0 +1,93 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_RESCTRL_H
+#define _ASM_X86_RESCTRL_H
+
+#ifdef CONFIG_X86_CPU_RESCTRL
+
+#include <linux/sched.h>
+#include <linux/jump_label.h>
+
+#define IA32_PQR_ASSOC 0x0c8f
+
+/**
+ * struct resctrl_pqr_state - State cache for the PQR MSR
+ * @cur_rmid: The cached Resource Monitoring ID
+ * @cur_closid: The cached Class Of Service ID
+ * @default_rmid: The user assigned Resource Monitoring ID
+ * @default_closid: The user assigned cached Class Of Service ID
+ *
+ * The upper 32 bits of IA32_PQR_ASSOC contain closid and the
+ * lower 10 bits rmid. The update to IA32_PQR_ASSOC always
+ * contains both parts, so we need to cache them. This also
+ * stores the user configured per cpu CLOSID and RMID.
+ *
+ * The cache also helps to avoid pointless updates if the value does
+ * not change.
+ */
+struct resctrl_pqr_state {
+ u32 cur_rmid;
+ u32 cur_closid;
+ u32 default_rmid;
+ u32 default_closid;
+};
+
+DECLARE_PER_CPU(struct resctrl_pqr_state, pqr_state);
+
+DECLARE_STATIC_KEY_FALSE(rdt_enable_key);
+DECLARE_STATIC_KEY_FALSE(rdt_alloc_enable_key);
+DECLARE_STATIC_KEY_FALSE(rdt_mon_enable_key);
+
+/*
+ * __resctrl_sched_in() - Writes the task's CLOSid/RMID to IA32_PQR_MSR
+ *
+ * Following considerations are made so that this has minimal impact
+ * on scheduler hot path:
+ * - This will stay as no-op unless we are running on an Intel SKU
+ * which supports resource control or monitoring and we enable by
+ * mounting the resctrl file system.
+ * - Caches the per cpu CLOSid/RMID values and does the MSR write only
+ * when a task with a different CLOSid/RMID is scheduled in.
+ * - We allocate RMIDs/CLOSids globally in order to keep this as
+ * simple as possible.
+ * Must be called with preemption disabled.
+ */
+static void __resctrl_sched_in(void)
+{
+ struct resctrl_pqr_state *state = this_cpu_ptr(&pqr_state);
+ u32 closid = state->default_closid;
+ u32 rmid = state->default_rmid;
+
+ /*
+ * If this task has a closid/rmid assigned, use it.
+ * Else use the closid/rmid assigned to this cpu.
+ */
+ if (static_branch_likely(&rdt_alloc_enable_key)) {
+ if (current->closid)
+ closid = current->closid;
+ }
+
+ if (static_branch_likely(&rdt_mon_enable_key)) {
+ if (current->rmid)
+ rmid = current->rmid;
+ }
+
+ if (closid != state->cur_closid || rmid != state->cur_rmid) {
+ state->cur_closid = closid;
+ state->cur_rmid = rmid;
+ wrmsr(IA32_PQR_ASSOC, rmid, closid);
+ }
+}
+
+static inline void resctrl_sched_in(void)
+{
+ if (static_branch_likely(&rdt_enable_key))
+ __resctrl_sched_in();
+}
+
+#else
+
+static inline void resctrl_sched_in(void) {}
+
+#endif /* CONFIG_X86_CPU_RESCTRL */
+
+#endif /* _ASM_X86_RESCTRL_H */
diff --git a/arch/x86/include/asm/resctrl_sched.h b/arch/x86/include/asm/resctrl_sched.h
deleted file mode 100644
index f6b7fe2..0000000
--- a/arch/x86/include/asm/resctrl_sched.h
+++ /dev/null
@@ -1,93 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_X86_RESCTRL_SCHED_H
-#define _ASM_X86_RESCTRL_SCHED_H
-
-#ifdef CONFIG_X86_CPU_RESCTRL
-
-#include <linux/sched.h>
-#include <linux/jump_label.h>
-
-#define IA32_PQR_ASSOC 0x0c8f
-
-/**
- * struct resctrl_pqr_state - State cache for the PQR MSR
- * @cur_rmid: The cached Resource Monitoring ID
- * @cur_closid: The cached Class Of Service ID
- * @default_rmid: The user assigned Resource Monitoring ID
- * @default_closid: The user assigned cached Class Of Service ID
- *
- * The upper 32 bits of IA32_PQR_ASSOC contain closid and the
- * lower 10 bits rmid. The update to IA32_PQR_ASSOC always
- * contains both parts, so we need to cache them. This also
- * stores the user configured per cpu CLOSID and RMID.
- *
- * The cache also helps to avoid pointless updates if the value does
- * not change.
- */
-struct resctrl_pqr_state {
- u32 cur_rmid;
- u32 cur_closid;
- u32 default_rmid;
- u32 default_closid;
-};
-
-DECLARE_PER_CPU(struct resctrl_pqr_state, pqr_state);
-
-DECLARE_STATIC_KEY_FALSE(rdt_enable_key);
-DECLARE_STATIC_KEY_FALSE(rdt_alloc_enable_key);
-DECLARE_STATIC_KEY_FALSE(rdt_mon_enable_key);
-
-/*
- * __resctrl_sched_in() - Writes the task's CLOSid/RMID to IA32_PQR_MSR
- *
- * Following considerations are made so that this has minimal impact
- * on scheduler hot path:
- * - This will stay as no-op unless we are running on an Intel SKU
- * which supports resource control or monitoring and we enable by
- * mounting the resctrl file system.
- * - Caches the per cpu CLOSid/RMID values and does the MSR write only
- * when a task with a different CLOSid/RMID is scheduled in.
- * - We allocate RMIDs/CLOSids globally in order to keep this as
- * simple as possible.
- * Must be called with preemption disabled.
- */
-static void __resctrl_sched_in(void)
-{
- struct resctrl_pqr_state *state = this_cpu_ptr(&pqr_state);
- u32 closid = state->default_closid;
- u32 rmid = state->default_rmid;
-
- /*
- * If this task has a closid/rmid assigned, use it.
- * Else use the closid/rmid assigned to this cpu.
- */
- if (static_branch_likely(&rdt_alloc_enable_key)) {
- if (current->closid)
- closid = current->closid;
- }
-
- if (static_branch_likely(&rdt_mon_enable_key)) {
- if (current->rmid)
- rmid = current->rmid;
- }
-
- if (closid != state->cur_closid || rmid != state->cur_rmid) {
- state->cur_closid = closid;
- state->cur_rmid = rmid;
- wrmsr(IA32_PQR_ASSOC, rmid, closid);
- }
-}
-
-static inline void resctrl_sched_in(void)
-{
- if (static_branch_likely(&rdt_enable_key))
- __resctrl_sched_in();
-}
-
-#else
-
-static inline void resctrl_sched_in(void) {}
-
-#endif /* CONFIG_X86_CPU_RESCTRL */
-
-#endif /* _ASM_X86_RESCTRL_SCHED_H */
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index d8cc522..6f38c88 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -22,7 +22,7 @@
#include <linux/cpuhotplug.h>
#include <asm/intel-family.h>
-#include <asm/resctrl_sched.h>
+#include <asm/resctrl.h>
#include "internal.h"
/* Mutex to protect rdtgroup access. */
diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
index d7623e1..4bd28b3 100644
--- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
+++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
@@ -24,7 +24,7 @@
#include <asm/cacheflush.h>
#include <asm/intel-family.h>
-#include <asm/resctrl_sched.h>
+#include <asm/resctrl.h>
#include <asm/perf_event.h>
#include "../../events/perf_event.h" /* For X86_CONFIG() */
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index 5a359d9..6276ae0 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -29,7 +29,7 @@
#include <uapi/linux/magic.h>
-#include <asm/resctrl_sched.h>
+#include <asm/resctrl.h>
#include "internal.h"
DEFINE_STATIC_KEY_FALSE(rdt_enable_key);
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 954b013..538d4e8 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -52,7 +52,7 @@
#include <asm/debugreg.h>
#include <asm/switch_to.h>
#include <asm/vm86.h>
-#include <asm/resctrl_sched.h>
+#include <asm/resctrl.h>
#include <asm/proto.h>
#include "process.h"
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 5ef9d8f..0c169a5 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -52,7 +52,7 @@
#include <asm/switch_to.h>
#include <asm/xen/hypervisor.h>
#include <asm/vdso.h>
-#include <asm/resctrl_sched.h>
+#include <asm/resctrl.h>
#include <asm/unistd.h>
#include <asm/fsgsbase.h>
#ifdef CONFIG_IA32_EMULATION
|