Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 cache resource updates from Thomas Gleixner:
 "This update provides updates to RDT:

  - A diagnostic framework for the Resource Director Technology (RDT)
    user interface (sysfs). The failure modes of the user interface are
    hard to diagnose from the error codes. An extra last command status
    file provides now sensible textual information about the failure so
    its simpler to use.

  - A few minor cleanups and updates in the RDT code"

* 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/intel_rdt: Fix a silent failure when writing zero value schemata
  x86/intel_rdt: Fix potential deadlock during resctrl mount
  x86/intel_rdt: Fix potential deadlock during resctrl unmount
  x86/intel_rdt: Initialize bitmask of shareable resource if CDP enabled
  x86/intel_rdt: Remove redundant assignment
  x86/intel_rdt/cqm: Make integer rmid_limbo_count static
  x86/intel_rdt: Add documentation for "info/last_cmd_status"
  x86/intel_rdt: Add diagnostics when making directories
  x86/intel_rdt: Add diagnostics when writing the cpus file
  x86/intel_rdt: Add diagnostics when writing the tasks file
  x86/intel_rdt: Add diagnostics when writing the schemata file
  x86/intel_rdt: Add framework for better RDT UI diagnostics

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h
index a43a72d8e88e..3397244984f5 100644
--- a/arch/x86/kernel/cpu/intel_rdt.h
+++ b/arch/x86/kernel/cpu/intel_rdt.h
@@ -127,12 +127,15 @@ struct rdtgroup {
 #define RFTYPE_BASE			BIT(1)
 #define RF_CTRLSHIFT			4
 #define RF_MONSHIFT			5
+#define RF_TOPSHIFT			6
 #define RFTYPE_CTRL			BIT(RF_CTRLSHIFT)
 #define RFTYPE_MON			BIT(RF_MONSHIFT)
+#define RFTYPE_TOP			BIT(RF_TOPSHIFT)
 #define RFTYPE_RES_CACHE		BIT(8)
 #define RFTYPE_RES_MB			BIT(9)
 #define RF_CTRL_INFO			(RFTYPE_INFO | RFTYPE_CTRL)
 #define RF_MON_INFO			(RFTYPE_INFO | RFTYPE_MON)
+#define RF_TOP_INFO			(RFTYPE_INFO | RFTYPE_TOP)
 #define RF_CTRL_BASE			(RFTYPE_BASE | RFTYPE_CTRL)
 
 /* List of all resource groups */
@@ -409,6 +412,10 @@ union cpuid_0x10_x_edx {
 	unsigned int full;
 };
 
+void rdt_last_cmd_clear(void);
+void rdt_last_cmd_puts(const char *s);
+void rdt_last_cmd_printf(const char *fmt, ...);
+
 void rdt_ctrl_update(void *arg);
 struct rdtgroup *rdtgroup_kn_lock_live(struct kernfs_node *kn);
 void rdtgroup_kn_unlock(struct kernfs_node *kn);