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
  ...

Author: torvalds

arch/s390/Kconfig

@@ -21,7 +21,7 @@ config ARCH_PROC_KCORE_TEXT
 	def_bool y
 
 config GENERIC_HWEIGHT
-	def_bool y
+	def_bool !HAVE_MARCH_Z196_FEATURES
 
 config GENERIC_BUG
 	def_bool y if BUG
@@ -142,6 +142,7 @@ config S390
 	select FUNCTION_ALIGNMENT_8B if CC_IS_GCC
 	select FUNCTION_ALIGNMENT_16B if !CC_IS_GCC
 	select GENERIC_ALLOCATOR
+	select GENERIC_CPU_DEVICES
 	select GENERIC_CPU_AUTOPROBE
 	select GENERIC_CPU_VULNERABILITIES
 	select GENERIC_ENTRY

arch/s390/boot/ipl_parm.c

@@ -51,11 +51,11 @@ static inline int __diag308(unsigned long subcode, void *addr)
 		: [r1] "+&d" (r1.pair),
 		  [reg1] "=&d" (reg1),
 		  [reg2] "=&a" (reg2),
-		  "+Q" (S390_lowcore.program_new_psw),
+		  "+Q" (get_lowcore()->program_new_psw),
 		  "=Q" (old)
 		: [subcode] "d" (subcode),
 		  [psw_old] "a" (&old),
-		  [psw_pgm] "a" (&S390_lowcore.program_new_psw)
+		  [psw_pgm] "a" (&get_lowcore()->program_new_psw)
 		: "cc", "memory");
 	return r1.odd;
 }

arch/s390/boot/ipl_report.c

@@ -106,7 +106,7 @@ int read_ipl_report(void)
 	 * the IPL parameter list, then align the address to a double
 	 * word boundary.
 	 */
-	tmp = (unsigned long) S390_lowcore.ipl_parmblock_ptr;
+	tmp = (unsigned long)get_lowcore()->ipl_parmblock_ptr;
 	pl_hdr = (struct ipl_pl_hdr *) tmp;
 	tmp = (tmp + pl_hdr->len + 7) & -8UL;
 	rl_hdr = (struct ipl_rl_hdr *) tmp;

arch/s390/boot/pgm_check_info.c

@@ -145,22 +145,22 @@ void print_stacktrace(unsigned long sp)
 
 void print_pgm_check_info(void)
 {
-	unsigned long *gpregs = (unsigned long *)S390_lowcore.gpregs_save_area;
-	struct psw_bits *psw = &psw_bits(S390_lowcore.psw_save_area);
+	unsigned long *gpregs = (unsigned long *)get_lowcore()->gpregs_save_area;
+	struct psw_bits *psw = &psw_bits(get_lowcore()->psw_save_area);
 
 	decompressor_printk("Linux version %s\n", kernel_version);
 	if (!is_prot_virt_guest() && early_command_line[0])
 		decompressor_printk("Kernel command line: %s\n", early_command_line);
 	decompressor_printk("Kernel fault: interruption code %04x ilc:%x\n",
-			    S390_lowcore.pgm_code, S390_lowcore.pgm_ilc >> 1);
+			    get_lowcore()->pgm_code, get_lowcore()->pgm_ilc >> 1);
 	if (kaslr_enabled()) {
 		decompressor_printk("Kernel random base: %lx\n", __kaslr_offset);
 		decompressor_printk("Kernel random base phys: %lx\n", __kaslr_offset_phys);
 	}
 	decompressor_printk("PSW : %016lx %016lx (%pS)\n",
-			    S390_lowcore.psw_save_area.mask,
-			    S390_lowcore.psw_save_area.addr,
-			    (void *)S390_lowcore.psw_save_area.addr);
+			    get_lowcore()->psw_save_area.mask,
+			    get_lowcore()->psw_save_area.addr,
+			    (void *)get_lowcore()->psw_save_area.addr);
 	decompressor_printk(
 		"      R:%x T:%x IO:%x EX:%x Key:%x M:%x W:%x P:%x AS:%x CC:%x PM:%x RI:%x EA:%x\n",
 		psw->per, psw->dat, psw->io, psw->ext, psw->key, psw->mcheck,
@@ -174,8 +174,8 @@ void print_pgm_check_info(void)
 			    gpregs[8], gpregs[9], gpregs[10], gpregs[11]);
 	decompressor_printk("      %016lx %016lx %016lx %016lx\n",
 			    gpregs[12], gpregs[13], gpregs[14], gpregs[15]);
-	print_stacktrace(S390_lowcore.gpregs_save_area[15]);
+	print_stacktrace(get_lowcore()->gpregs_save_area[15]);
 	decompressor_printk("Last Breaking-Event-Address:\n");
-	decompressor_printk(" [<%016lx>] %pS\n", (unsigned long)S390_lowcore.pgm_last_break,
-			    (void *)S390_lowcore.pgm_last_break);
+	decompressor_printk(" [<%016lx>] %pS\n", (unsigned long)get_lowcore()->pgm_last_break,
+			    (void *)get_lowcore()->pgm_last_break);
 }

arch/s390/boot/physmem_info.c

@@ -81,11 +81,11 @@ static int __diag260(unsigned long rx1, unsigned long rx2)
 		  [reg2] "=&a" (reg2),
 		  [rc] "+&d" (rc),
 		  [ry] "+&d" (ry),
-		  "+Q" (S390_lowcore.program_new_psw),
+		  "+Q" (get_lowcore()->program_new_psw),
 		  "=Q" (old)
 		: [rx] "d" (rx.pair),
 		  [psw_old] "a" (&old),
-		  [psw_pgm] "a" (&S390_lowcore.program_new_psw)
+		  [psw_pgm] "a" (&get_lowcore()->program_new_psw)
 		: "cc", "memory");
 	return rc == 0 ? ry : -1;
 }
@@ -129,10 +129,10 @@ static int tprot(unsigned long addr)
 		: [reg1] "=&d" (reg1),
 		  [reg2] "=&a" (reg2),
 		  [rc] "+&d" (rc),
-		  "=Q" (S390_lowcore.program_new_psw.addr),
+		  "=Q" (get_lowcore()->program_new_psw.addr),
 		  "=Q" (old)
 		: [psw_old] "a" (&old),
-		  [psw_pgm] "a" (&S390_lowcore.program_new_psw),
+		  [psw_pgm] "a" (&get_lowcore()->program_new_psw),
 		  [addr] "a" (addr)
 		: "cc", "memory");
 	return rc;

arch/s390/boot/startup.c

@@ -78,10 +78,10 @@ static int cmma_test_essa(void)
 		  [reg2] "=&a" (reg2),
 		  [rc] "+&d" (rc),
 		  [tmp] "=&d" (tmp),
-		  "+Q" (S390_lowcore.program_new_psw),
+		  "+Q" (get_lowcore()->program_new_psw),
 		  "=Q" (old)
 		: [psw_old] "a" (&old),
-		  [psw_pgm] "a" (&S390_lowcore.program_new_psw),
+		  [psw_pgm] "a" (&get_lowcore()->program_new_psw),
 		  [cmd] "i" (ESSA_GET_STATE)
 		: "cc", "memory");
 	return rc;
@@ -101,10 +101,10 @@ static void cmma_init(void)
 
 static void setup_lpp(void)
 {
-	S390_lowcore.current_pid = 0;
-	S390_lowcore.lpp = LPP_MAGIC;
+	get_lowcore()->current_pid = 0;
+	get_lowcore()->lpp = LPP_MAGIC;
 	if (test_facility(40))
-		lpp(&S390_lowcore.lpp);
+		lpp(&get_lowcore()->lpp);
 }
 
 #ifdef CONFIG_KERNEL_UNCOMPRESSED
@@ -501,7 +501,7 @@ void startup_kernel(void)
 	 * Save KASLR offset for early dumps, before vmcore_info is set.
 	 * Mark as uneven to distinguish from real vmcore_info pointer.
 	 */
-	S390_lowcore.vmcore_info = __kaslr_offset_phys ? __kaslr_offset_phys | 0x1UL : 0;
+	get_lowcore()->vmcore_info = __kaslr_offset_phys ? __kaslr_offset_phys | 0x1UL : 0;
 
 	/*
 	 * Jump to the decompressed kernel entry point and switch DAT mode on.

arch/s390/boot/vmem.c

@@ -476,13 +476,13 @@ void setup_vmem(unsigned long kernel_start, unsigned long kernel_end, unsigned l
 
 	kasan_populate_shadow(kernel_start, kernel_end);
 
-	S390_lowcore.kernel_asce.val = swapper_pg_dir | asce_bits;
-	S390_lowcore.user_asce = s390_invalid_asce;
+	get_lowcore()->kernel_asce.val = swapper_pg_dir | asce_bits;
+	get_lowcore()->user_asce = s390_invalid_asce;
 
-	local_ctl_load(1, &S390_lowcore.kernel_asce);
-	local_ctl_load(7, &S390_lowcore.user_asce);
-	local_ctl_load(13, &S390_lowcore.kernel_asce);
+	local_ctl_load(1, &get_lowcore()->kernel_asce);
+	local_ctl_load(7, &get_lowcore()->user_asce);
+	local_ctl_load(13, &get_lowcore()->kernel_asce);
 
-	init_mm.context.asce = S390_lowcore.kernel_asce.val;
+	init_mm.context.asce = get_lowcore()->kernel_asce.val;
 	init_mm.pgd = init_mm_pgd;
 }

arch/s390/crypto/crc32-vx.c

@@ -297,6 +297,7 @@ module_cpu_feature_match(S390_CPU_FEATURE_VXRS, crc_vx_mod_init);
 module_exit(crc_vx_mod_exit);
 
 MODULE_AUTHOR("Hendrik Brueckner <brueckner@linux.vnet.ibm.com>");
+MODULE_DESCRIPTION("CRC-32 algorithms using z/Architecture Vector Extension Facility");
 MODULE_LICENSE("GPL");
 
 MODULE_ALIAS_CRYPTO("crc32");

arch/s390/hypfs/hypfs_dbfs.c

@@ -39,7 +39,9 @@ static ssize_t dbfs_read(struct file *file, char __user *buf,
 		return 0;
 
 	df = file_inode(file)->i_private;
-	mutex_lock(&df->lock);
+	if (mutex_lock_interruptible(&df->lock))
+		return -ERESTARTSYS;
+
 	data = hypfs_dbfs_data_alloc(df);
 	if (!data) {
 		mutex_unlock(&df->lock);

arch/s390/hypfs/hypfs_diag.c

@@ -140,11 +140,22 @@ static int diag204_probe(void)
 
 int diag204_store(void *buf, int pages)
 {
+	unsigned long subcode;
 	int rc;
 
-	rc = diag204((unsigned long)diag204_store_sc |
-		     (unsigned long)diag204_get_info_type(), pages, buf);
-	return rc < 0 ? -EOPNOTSUPP : 0;
+	subcode = diag204_get_info_type();
+	subcode |= diag204_store_sc;
+	if (diag204_has_bif())
+		subcode |= DIAG204_BIF_BIT;
+	while (1) {
+		rc = diag204(subcode, pages, buf);
+		if (rc != -EBUSY)
+			break;
+		if (signal_pending(current))
+			return -ERESTARTSYS;
+		schedule_timeout_interruptible(DIAG204_BUSY_WAIT);
+	}
+	return rc < 0 ? rc : 0;
 }
 
 struct dbfs_d204_hdr {