Merge tag 's390-6.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Vasily Gorbik:

 - Remove restrictions on PAI NNPA and crypto counters, enabling
   concurrent per-task and system-wide sampling and counting events

 - Switch to GENERIC_CPU_DEVICES by setting up the CPU present mask in
   the architecture code and letting the generic code handle CPU
   bring-up

 - Add support for the diag204 busy indication facility to prevent
   undesirable blocking during hypervisor logical CPU utilization
   queries. Implement results caching

 - Improve the handling of Store Data SCLP events by suppressing
   unnecessary warning, preventing buffer release in I/O during
   failures, and adding timeout handling for Store Data requests to
   address potential firmware issues

 - Provide optimized __arch_hweight*() implementations

 - Remove the unnecessary CPU KOBJ_CHANGE uevents generated during
   topology updates, as they are unused and also not present on other
   architectures

 - Cleanup atomic_ops, optimize __atomic_set() for small values and
   __atomic_cmpxchg_bool() for compilers supporting flag output
   constraint

 - Couple of cleanups for KVM:
     - Move and improve KVM struct definitions for DAT tables from
       gaccess.c to a new header
     - Pass the asce as parameter to sie64a()

 - Make the crdte() and cspg() page table handling wrappers return a
   boolean to indicate success, like the other existing "compare and
   swap" wrappers

 - Add documentation for HWCAP flags

 - Switch to obtaining total RAM pages from memblock instead of
   totalram_pages() during mm init, to ensure correct calculation of
   zero page size, when defer_init is enabled

 - Refactor lowcore access and switch to using the get_lowcore()
   function instead of the S390_lowcore macro

 - Cleanups for PG_arch_1 and folio handling in UV and hugetlb code

 - Add missing MODULE_DESCRIPTION() macros

 - Fix VM_FAULT_HWPOISON handling in do_exception()

* tag 's390-6.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (54 commits)
  s390/mm: Fix VM_FAULT_HWPOISON handling in do_exception()
  s390/kvm: Move bitfields for dat tables
  s390/entry: Pass the asce as parameter to sie64a()
  s390/sthyi: Use cached data when diag is busy
  s390/sthyi: Move diag operations
  s390/hypfs_diag: Diag204 busy loop
  s390/diag: Add busy-indication-facility requirements
  s390/diag: Diag204 add busy return errno
  s390/diag: Return errno's from diag204
  s390/sclp: Diag204 busy indication facility detection
  s390/atomic_ops: Make use of flag output constraint
  s390/atomic_ops: Improve __atomic_set() for small values
  s390/atomic_ops: Use symbolic names
  s390/smp: Switch to GENERIC_CPU_DEVICES
  s390/hwcaps: Add documentation for HWCAP flags
  s390/pgtable: Make crdte() and cspg() return a value
  s390/topology: Remove CPU KOBJ_CHANGE uevents
  s390/sclp: Add timeout to Store Data requests
  s390/sclp: Prevent release of buffer in I/O
  s390/sclp: Suppress unnecessary Store Data warning
  ...

1 files changed, 170 insertions, 0 deletions

diff --git a/arch/s390/include/asm/dat-bits.h b/arch/s390/include/asm/dat-bits.h
new file mode 100644
index 000000000000..8d65eec2f124
--- /dev/null
+++ b/arch/s390/include/asm/dat-bits.h
@@ -0,0 +1,170 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * DAT table and related structures
+ *
+ * Copyright IBM Corp. 2024
+ *
+ */
+
+#ifndef _S390_DAT_BITS_H
+#define _S390_DAT_BITS_H
+
+union asce {
+	unsigned long val;
+	struct {
+		unsigned long rsto: 52;/* Region- or Segment-Table Origin */
+		unsigned long	  : 2;
+		unsigned long g   : 1; /* Subspace Group control */
+		unsigned long p   : 1; /* Private Space control */
+		unsigned long s   : 1; /* Storage-Alteration-Event control */
+		unsigned long x   : 1; /* Space-Switch-Event control */
+		unsigned long r   : 1; /* Real-Space control */
+		unsigned long	  : 1;
+		unsigned long dt  : 2; /* Designation-Type control */
+		unsigned long tl  : 2; /* Region- or Segment-Table Length */
+	};
+};
+
+enum {
+	ASCE_TYPE_SEGMENT = 0,
+	ASCE_TYPE_REGION3 = 1,
+	ASCE_TYPE_REGION2 = 2,
+	ASCE_TYPE_REGION1 = 3
+};
+
+union region1_table_entry {
+	unsigned long val;
+	struct {
+		unsigned long rto: 52;/* Region-Table Origin */
+		unsigned long	 : 2;
+		unsigned long p  : 1; /* DAT-Protection Bit */
+		unsigned long	 : 1;
+		unsigned long tf : 2; /* Region-Second-Table Offset */
+		unsigned long i  : 1; /* Region-Invalid Bit */
+		unsigned long	 : 1;
+		unsigned long tt : 2; /* Table-Type Bits */
+		unsigned long tl : 2; /* Region-Second-Table Length */
+	};
+};
+
+union region2_table_entry {
+	unsigned long val;
+	struct {
+		unsigned long rto: 52;/* Region-Table Origin */
+		unsigned long	 : 2;
+		unsigned long p  : 1; /* DAT-Protection Bit */
+		unsigned long	 : 1;
+		unsigned long tf : 2; /* Region-Third-Table Offset */
+		unsigned long i  : 1; /* Region-Invalid Bit */
+		unsigned long	 : 1;
+		unsigned long tt : 2; /* Table-Type Bits */
+		unsigned long tl : 2; /* Region-Third-Table Length */
+	};
+};
+
+struct region3_table_entry_fc0 {
+	unsigned long sto: 52;/* Segment-Table Origin */
+	unsigned long	 : 1;
+	unsigned long fc : 1; /* Format-Control */
+	unsigned long p  : 1; /* DAT-Protection Bit */
+	unsigned long	 : 1;
+	unsigned long tf : 2; /* Segment-Table Offset */
+	unsigned long i  : 1; /* Region-Invalid Bit */
+	unsigned long cr : 1; /* Common-Region Bit */
+	unsigned long tt : 2; /* Table-Type Bits */
+	unsigned long tl : 2; /* Segment-Table Length */
+};
+
+struct region3_table_entry_fc1 {
+	unsigned long rfaa: 33;/* Region-Frame Absolute Address */
+	unsigned long	  : 14;
+	unsigned long av  : 1; /* ACCF-Validity Control */
+	unsigned long acc : 4; /* Access-Control Bits */
+	unsigned long f   : 1; /* Fetch-Protection Bit */
+	unsigned long fc  : 1; /* Format-Control */
+	unsigned long p   : 1; /* DAT-Protection Bit */
+	unsigned long iep : 1; /* Instruction-Execution-Protection */
+	unsigned long	  : 2;
+	unsigned long i   : 1; /* Region-Invalid Bit */
+	unsigned long cr  : 1; /* Common-Region Bit */
+	unsigned long tt  : 2; /* Table-Type Bits */
+	unsigned long	  : 2;
+};
+
+union region3_table_entry {
+	unsigned long val;
+	struct region3_table_entry_fc0 fc0;
+	struct region3_table_entry_fc1 fc1;
+	struct {
+		unsigned long	: 53;
+		unsigned long fc: 1; /* Format-Control */
+		unsigned long	: 4;
+		unsigned long i : 1; /* Region-Invalid Bit */
+		unsigned long cr: 1; /* Common-Region Bit */
+		unsigned long tt: 2; /* Table-Type Bits */
+		unsigned long	: 2;
+	};
+};
+
+struct segment_table_entry_fc0 {
+	unsigned long pto: 53;/* Page-Table Origin */
+	unsigned long fc : 1; /* Format-Control */
+	unsigned long p  : 1; /* DAT-Protection Bit */
+	unsigned long	 : 3;
+	unsigned long i  : 1; /* Segment-Invalid Bit */
+	unsigned long cs : 1; /* Common-Segment Bit */
+	unsigned long tt : 2; /* Table-Type Bits */
+	unsigned long	 : 2;
+};
+
+struct segment_table_entry_fc1 {
+	unsigned long sfaa: 44;/* Segment-Frame Absolute Address */
+	unsigned long	  : 3;
+	unsigned long av  : 1; /* ACCF-Validity Control */
+	unsigned long acc : 4; /* Access-Control Bits */
+	unsigned long f   : 1; /* Fetch-Protection Bit */
+	unsigned long fc  : 1; /* Format-Control */
+	unsigned long p   : 1; /* DAT-Protection Bit */
+	unsigned long iep : 1; /* Instruction-Execution-Protection */
+	unsigned long	  : 2;
+	unsigned long i   : 1; /* Segment-Invalid Bit */
+	unsigned long cs  : 1; /* Common-Segment Bit */
+	unsigned long tt  : 2; /* Table-Type Bits */
+	unsigned long	  : 2;
+};
+
+union segment_table_entry {
+	unsigned long val;
+	struct segment_table_entry_fc0 fc0;
+	struct segment_table_entry_fc1 fc1;
+	struct {
+		unsigned long	: 53;
+		unsigned long fc: 1; /* Format-Control */
+		unsigned long	: 4;
+		unsigned long i : 1; /* Segment-Invalid Bit */
+		unsigned long cs: 1; /* Common-Segment Bit */
+		unsigned long tt: 2; /* Table-Type Bits */
+		unsigned long	: 2;
+	};
+};
+
+union page_table_entry {
+	unsigned long val;
+	struct {
+		unsigned long pfra: 52;/* Page-Frame Real Address */
+		unsigned long z   : 1; /* Zero Bit */
+		unsigned long i   : 1; /* Page-Invalid Bit */
+		unsigned long p   : 1; /* DAT-Protection Bit */
+		unsigned long iep : 1; /* Instruction-Execution-Protection */
+		unsigned long	  : 8;
+	};
+};
+
+enum {
+	TABLE_TYPE_SEGMENT = 0,
+	TABLE_TYPE_REGION3 = 1,
+	TABLE_TYPE_REGION2 = 2,
+	TABLE_TYPE_REGION1 = 3
+};
+
+#endif /* _S390_DAT_BITS_H */