Merge tag 's390-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Alexander Gordeev:

 - Add check whether the required facilities are installed before using
   the s390-specific ChaCha20 implementation

 - Key blobs for s390 protected key interface IOCTLs commands
   PKEY_VERIFYKEY2 and PKEY_VERIFYKEY3 may contain clear key material.
   Zeroize copies of these keys in kernel memory after creating
   protected keys

 - Set CONFIG_INIT_STACK_NONE=y in defconfigs to avoid extra overhead of
   initializing all stack variables by default

 - Make sure that when a new channel-path is enabled all subchannels are
   evaluated: with and without any devices connected on it

 - When SMT thread CPUs are added to CPU topology masks the nr_cpu_ids
   limit is not checked and could be exceeded. Respect the nr_cpu_ids
   limit and avoid a warning when CONFIG_DEBUG_PER_CPU_MAPS is set

 - The pointer to IPL Parameter Information Block is stored in the
   absolute lowcore as a virtual address. Save it as the physical
   address for later use by dump tools

 - Fix a Queued Direct I/O (QDIO) problem on z/VM guests using QIOASSIST
   with dedicated (pass through) QDIO-based devices such as FCP, real
   OSA or HiperSockets

 - s390's struct statfs and struct statfs64 contain padding, which
   field-by-field copying does not set. Initialize the respective
   structures with zeros before filling them and copying to userspace

 - Grow s390 compat_statfs64, statfs and statfs64 structures f_spare
   array member to cover padding and simplify things

 - Remove obsolete SCHED_BOOK and SCHED_DRAWER configs

 - Remove unneeded S390_CCW_IOMMU and S390_AP_IOM configs

* tag 's390-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/iommu: get rid of S390_CCW_IOMMU and S390_AP_IOMMU
  s390/Kconfig: remove obsolete configs SCHED_{BOOK,DRAWER}
  s390/uapi: cover statfs padding by growing f_spare
  statfs: enforce statfs[64] structure initialization
  s390/qdio: fix do_sqbs() inline assembly constraint
  s390/ipl: fix IPIB virtual vs physical address confusion
  s390/topology: honour nr_cpu_ids when adding CPUs
  s390/cio: include subchannels without devices also for evaluation
  s390/defconfigs: set CONFIG_INIT_STACK_NONE=y
  s390/pkey: zeroize key blobs
  s390/crypto: use vector instructions only if available for ChaCha20

Documentation/s390/vfio-ap.rst

@@ -551,7 +551,6 @@ These are the steps:
    * IOMMU_SUPPORT
    * S390
    * ZCRYPT
-   * S390_AP_IOMMU
    * VFIO
    * KVM
 

arch/s390/Kconfig

@@ -469,19 +469,11 @@ config SCHED_SMT
 config SCHED_MC
 	def_bool n
 
-config SCHED_BOOK
-	def_bool n
-
-config SCHED_DRAWER
-	def_bool n
-
 config SCHED_TOPOLOGY
 	def_bool y
 	prompt "Topology scheduler support"
 	select SCHED_SMT
 	select SCHED_MC
-	select SCHED_BOOK
-	select SCHED_DRAWER
 	help
 	  Topology scheduler support improves the CPU scheduler's decision
 	  making when dealing with machines that have multi-threading,
@@ -716,7 +708,6 @@ config EADM_SCH
 config VFIO_CCW
 	def_tristate n
 	prompt "Support for VFIO-CCW subchannels"
-	depends on S390_CCW_IOMMU
 	depends on VFIO
 	select VFIO_MDEV
 	help
@@ -728,7 +719,7 @@ config VFIO_CCW
 config VFIO_AP
 	def_tristate n
 	prompt "VFIO support for AP devices"
-	depends on S390_AP_IOMMU && KVM
+	depends on KVM
 	depends on VFIO
 	depends on ZCRYPT
 	select VFIO_MDEV

arch/s390/configs/debug_defconfig

@@ -591,8 +591,6 @@ CONFIG_VIRTIO_BALLOON=m
 CONFIG_VIRTIO_INPUT=y
 CONFIG_VHOST_NET=m
 CONFIG_VHOST_VSOCK=m
-CONFIG_S390_CCW_IOMMU=y
-CONFIG_S390_AP_IOMMU=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_EXT4_FS_SECURITY=y
@@ -703,6 +701,7 @@ CONFIG_IMA_DEFAULT_HASH_SHA256=y
 CONFIG_IMA_WRITE_POLICY=y
 CONFIG_IMA_APPRAISE=y
 CONFIG_LSM="yama,loadpin,safesetid,integrity,selinux,smack,tomoyo,apparmor"
+CONFIG_INIT_STACK_NONE=y
 CONFIG_CRYPTO_USER=m
 # CONFIG_CRYPTO_MANAGER_DISABLE_TESTS is not set
 CONFIG_CRYPTO_PCRYPT=m

arch/s390/configs/defconfig

@@ -580,8 +580,6 @@ CONFIG_VIRTIO_BALLOON=m
 CONFIG_VIRTIO_INPUT=y
 CONFIG_VHOST_NET=m
 CONFIG_VHOST_VSOCK=m
-CONFIG_S390_CCW_IOMMU=y
-CONFIG_S390_AP_IOMMU=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_EXT4_FS_SECURITY=y
@@ -686,6 +684,7 @@ CONFIG_IMA_DEFAULT_HASH_SHA256=y
 CONFIG_IMA_WRITE_POLICY=y
 CONFIG_IMA_APPRAISE=y
 CONFIG_LSM="yama,loadpin,safesetid,integrity,selinux,smack,tomoyo,apparmor"
+CONFIG_INIT_STACK_NONE=y
 CONFIG_CRYPTO_FIPS=y
 CONFIG_CRYPTO_USER=m
 # CONFIG_CRYPTO_MANAGER_DISABLE_TESTS is not set

arch/s390/configs/zfcpdump_defconfig

@@ -67,6 +67,7 @@ CONFIG_ZFCP=y
 # CONFIG_MISC_FILESYSTEMS is not set
 # CONFIG_NETWORK_FILESYSTEMS is not set
 CONFIG_LSM="yama,loadpin,safesetid,integrity"
+CONFIG_INIT_STACK_NONE=y
 # CONFIG_ZLIB_DFLTCC is not set
 CONFIG_XZ_DEC_MICROLZMA=y
 CONFIG_PRINTK_TIME=y

arch/s390/crypto/chacha-glue.c

@@ -82,7 +82,7 @@ void chacha_crypt_arch(u32 *state, u8 *dst, const u8 *src,
 	 * it cannot handle a block of data or less, but otherwise
 	 * it can handle data of arbitrary size
 	 */
-	if (bytes <= CHACHA_BLOCK_SIZE || nrounds != 20)
+	if (bytes <= CHACHA_BLOCK_SIZE || nrounds != 20 || !MACHINE_HAS_VX)
 		chacha_crypt_generic(state, dst, src, bytes, nrounds);
 	else
 		chacha20_crypt_s390(state, dst, src, bytes,

arch/s390/include/asm/compat.h

@@ -112,7 +112,7 @@ struct compat_statfs64 {
 	u32		f_namelen;
 	u32		f_frsize;
 	u32		f_flags;
-	u32		f_spare[4];
+	u32		f_spare[5];
 };
 
 /*

arch/s390/include/uapi/asm/statfs.h

@@ -30,7 +30,7 @@ struct statfs {
 	unsigned int	f_namelen;
 	unsigned int	f_frsize;
 	unsigned int	f_flags;
-	unsigned int	f_spare[4];
+	unsigned int	f_spare[5];
 };
 
 struct statfs64 {
@@ -45,7 +45,7 @@ struct statfs64 {
 	unsigned int	f_namelen;
 	unsigned int	f_frsize;
 	unsigned int	f_flags;
-	unsigned int	f_spare[4];
+	unsigned int	f_spare[5];
 };
 
 #endif

arch/s390/kernel/ipl.c

@@ -1935,14 +1935,13 @@ static struct shutdown_action __refdata dump_action = {
 
 static void dump_reipl_run(struct shutdown_trigger *trigger)
 {
-	unsigned long ipib = (unsigned long) reipl_block_actual;
 	struct lowcore *abs_lc;
 	unsigned int csum;
 
 	csum = (__force unsigned int)
 	       csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
 	abs_lc = get_abs_lowcore();
-	abs_lc->ipib = ipib;
+	abs_lc->ipib = __pa(reipl_block_actual);
 	abs_lc->ipib_checksum = csum;
 	put_abs_lowcore(abs_lc);
 	dump_run(trigger);

arch/s390/kernel/topology.c

@@ -95,7 +95,7 @@ static void cpu_group_map(cpumask_t *dst, struct mask_info *info, unsigned int c
 static void cpu_thread_map(cpumask_t *dst, unsigned int cpu)
 {
 	static cpumask_t mask;
-	int i;
+	unsigned int max_cpu;
 
 	cpumask_clear(&mask);
 	if (!cpumask_test_cpu(cpu, &cpu_setup_mask))
@@ -104,9 +104,10 @@ static void cpu_thread_map(cpumask_t *dst, unsigned int cpu)
 	if (topology_mode != TOPOLOGY_MODE_HW)
 		goto out;
 	cpu -= cpu % (smp_cpu_mtid + 1);
-	for (i = 0; i <= smp_cpu_mtid; i++) {
-		if (cpumask_test_cpu(cpu + i, &cpu_setup_mask))
-			cpumask_set_cpu(cpu + i, &mask);
+	max_cpu = min(cpu + smp_cpu_mtid, nr_cpu_ids - 1);
+	for (; cpu <= max_cpu; cpu++) {
+		if (cpumask_test_cpu(cpu, &cpu_setup_mask))
+			cpumask_set_cpu(cpu, &mask);
 	}
 out:
 	cpumask_copy(dst, &mask);
@@ -123,25 +124,26 @@ static void add_cpus_to_mask(struct topology_core *tl_core,
 	unsigned int core;
 
 	for_each_set_bit(core, &tl_core->mask, TOPOLOGY_CORE_BITS) {
-		unsigned int rcore;
-		int lcpu, i;
+		unsigned int max_cpu, rcore;
+		int cpu;
 
 		rcore = TOPOLOGY_CORE_BITS - 1 - core + tl_core->origin;
-		lcpu = smp_find_processor_id(rcore << smp_cpu_mt_shift);
-		if (lcpu < 0)
+		cpu = smp_find_processor_id(rcore << smp_cpu_mt_shift);
+		if (cpu < 0)
 			continue;
-		for (i = 0; i <= smp_cpu_mtid; i++) {
-			topo = &cpu_topology[lcpu + i];
+		max_cpu = min(cpu + smp_cpu_mtid, nr_cpu_ids - 1);
+		for (; cpu <= max_cpu; cpu++) {
+			topo = &cpu_topology[cpu];
 			topo->drawer_id = drawer->id;
 			topo->book_id = book->id;
 			topo->socket_id = socket->id;
 			topo->core_id = rcore;
-			topo->thread_id = lcpu + i;
+			topo->thread_id = cpu;
 			topo->dedicated = tl_core->d;
-			cpumask_set_cpu(lcpu + i, &drawer->mask);
-			cpumask_set_cpu(lcpu + i, &book->mask);
-			cpumask_set_cpu(lcpu + i, &socket->mask);
-			smp_cpu_set_polarization(lcpu + i, tl_core->pp);
+			cpumask_set_cpu(cpu, &drawer->mask);
+			cpumask_set_cpu(cpu, &book->mask);
+			cpumask_set_cpu(cpu, &socket->mask);
+			smp_cpu_set_polarization(cpu, tl_core->pp);
 		}
 	}
 }

drivers/iommu/Kconfig

@@ -417,22 +417,6 @@ config S390_IOMMU
 	help
 	  Support for the IOMMU API for s390 PCI devices.
 
-config S390_CCW_IOMMU
-	bool "S390 CCW IOMMU Support"
-	depends on S390 && CCW || COMPILE_TEST
-	select IOMMU_API
-	help
-	  Enables bits of IOMMU API required by VFIO. The iommu_ops
-	  is not implemented as it is not necessary for VFIO.
-
-config S390_AP_IOMMU
-	bool "S390 AP IOMMU Support"
-	depends on S390 && ZCRYPT || COMPILE_TEST
-	select IOMMU_API
-	help
-	  Enables bits of IOMMU API required by VFIO. The iommu_ops
-	  is not implemented as it is not necessary for VFIO.
-
 config MTK_IOMMU
 	tristate "MediaTek IOMMU Support"
 	depends on ARCH_MEDIATEK || COMPILE_TEST

drivers/s390/cio/device.c

@@ -1111,6 +1111,8 @@ static void io_subchannel_verify(struct subchannel *sch)
 	cdev = sch_get_cdev(sch);
 	if (cdev)
 		dev_fsm_event(cdev, DEV_EVENT_VERIFY);
+	else
+		css_schedule_eval(sch->schid);
 }
 
 static void io_subchannel_terminate_path(struct subchannel *sch, u8 mask)

drivers/s390/cio/qdio.h

@@ -95,7 +95,7 @@ static inline int do_sqbs(u64 token, unsigned char state, int queue,
 		"	lgr	1,%[token]\n"
 		"	.insn	rsy,0xeb000000008a,%[qs],%[ccq],0(%[state])"
 		: [ccq] "+&d" (_ccq), [qs] "+&d" (_queuestart)
-		: [state] "d" ((unsigned long)state), [token] "d" (token)
+		: [state] "a" ((unsigned long)state), [token] "d" (token)
 		: "memory", "cc", "1");
 	*count = _ccq & 0xff;
 	*start = _queuestart & 0xff;

drivers/s390/crypto/pkey_api.c

@@ -1293,6 +1293,7 @@ static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd,
 			return PTR_ERR(kkey);
 		rc = pkey_keyblob2pkey(kkey, ktp.keylen, &ktp.protkey);
 		DEBUG_DBG("%s pkey_keyblob2pkey()=%d\n", __func__, rc);
+		memzero_explicit(kkey, ktp.keylen);
 		kfree(kkey);
 		if (rc)
 			break;
@@ -1426,6 +1427,7 @@ static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd,
 					kkey, ktp.keylen, &ktp.protkey);
 		DEBUG_DBG("%s pkey_keyblob2pkey2()=%d\n", __func__, rc);
 		kfree(apqns);
+		memzero_explicit(kkey, ktp.keylen);
 		kfree(kkey);
 		if (rc)
 			break;
@@ -1552,6 +1554,7 @@ static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd,
 					protkey, &protkeylen);
 		DEBUG_DBG("%s pkey_keyblob2pkey3()=%d\n", __func__, rc);
 		kfree(apqns);
+		memzero_explicit(kkey, ktp.keylen);
 		kfree(kkey);
 		if (rc) {
 			kfree(protkey);

fs/statfs.c

@@ -130,6 +130,7 @@ static int do_statfs_native(struct kstatfs *st, struct statfs __user *p)
 	if (sizeof(buf) == sizeof(*st))
 		memcpy(&buf, st, sizeof(*st));
 	else {
+		memset(&buf, 0, sizeof(buf));
 		if (sizeof buf.f_blocks == 4) {
 			if ((st->f_blocks | st->f_bfree | st->f_bavail |
 			     st->f_bsize | st->f_frsize) &
@@ -158,7 +159,6 @@ static int do_statfs_native(struct kstatfs *st, struct statfs __user *p)
 		buf.f_namelen = st->f_namelen;
 		buf.f_frsize = st->f_frsize;
 		buf.f_flags = st->f_flags;
-		memset(buf.f_spare, 0, sizeof(buf.f_spare));
 	}
 	if (copy_to_user(p, &buf, sizeof(buf)))
 		return -EFAULT;
@@ -171,6 +171,7 @@ static int do_statfs64(struct kstatfs *st, struct statfs64 __user *p)
 	if (sizeof(buf) == sizeof(*st))
 		memcpy(&buf, st, sizeof(*st));
 	else {
+		memset(&buf, 0, sizeof(buf));
 		buf.f_type = st->f_type;
 		buf.f_bsize = st->f_bsize;
 		buf.f_blocks = st->f_blocks;
@@ -182,7 +183,6 @@ static int do_statfs64(struct kstatfs *st, struct statfs64 __user *p)
 		buf.f_namelen = st->f_namelen;
 		buf.f_frsize = st->f_frsize;
 		buf.f_flags = st->f_flags;
-		memset(buf.f_spare, 0, sizeof(buf.f_spare));
 	}
 	if (copy_to_user(p, &buf, sizeof(buf)))
 		return -EFAULT;