Merge tag 's390-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Vasily Gorbik:

 - Fix machine check handler _CIF_MCCK_GUEST bit setting by adding the
   missing base register for relocated lowcore address

 - Fix build failure on older linkers by conditionally adding the
   -no-pie linker option only when it is supported

 - Fix inaccurate kernel messages in vfio-ap by providing descriptive
   error notifications for AP queue sharing violations

 - Fix PCI isolation logic by ensuring non-VF devices correctly return
   false in zpci_bus_is_isolated_vf()

 - Fix PCI DMA range map setup by using dma_direct_set_offset() to add a
   proper sentinel element, preventing potential overruns and
   translation errors

 - Cleanup header dependency problems with asm-offsets.c

 - Add fault info for unexpected low-address protection faults in user
   mode

 - Add support for HOTPLUG_SMT, replacing the arch-specific "nosmt"
   handling with common code handling

 - Use bitop functions to implement CPU flag helper functions to ensure
   that bits cannot get lost if modified in different contexts on a CPU

 - Remove unused machine_flags for the lowcore

* tag 's390-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/vfio-ap: Fix no AP queue sharing allowed message written to kernel log
  s390/pci: Fix dev.dma_range_map missing sentinel element
  s390/mm: Dump fault info in case of low address protection fault
  s390/smp: Add support for HOTPLUG_SMT
  s390: Fix linker error when -no-pie option is unavailable
  s390/processor: Use bitop functions for cpu flag helper functions
  s390/asm-offsets: Remove ASM_OFFSETS_C
  s390/asm-offsets: Include ftrace_regs.h instead of ftrace.h
  s390/kvm: Split kvm_host header file
  s390/pci: Fix zpci_bus_is_isolated_vf() for non-VFs
  s390/lowcore: Remove unused machine_flags
  s390/entry: Fix setting _CIF_MCCK_GUEST with lowcore relocation

Author: torvalds

Documentation/admin-guide/kernel-parameters.txt

@@ -4265,10 +4265,10 @@
 	nosmp		[SMP,EARLY] Tells an SMP kernel to act as a UP kernel,
 			and disable the IO APIC.  legacy for "maxcpus=0".
 
-	nosmt		[KNL,MIPS,PPC,S390,EARLY] Disable symmetric multithreading (SMT).
+	nosmt		[KNL,MIPS,PPC,EARLY] Disable symmetric multithreading (SMT).
 			Equivalent to smt=1.
 
-			[KNL,X86,PPC] Disable symmetric multithreading (SMT).
+			[KNL,X86,PPC,S390] Disable symmetric multithreading (SMT).
 			nosmt=force: Force disable SMT, cannot be undone
 				     via the sysfs control file.
 

arch/s390/Kconfig

@@ -240,6 +240,7 @@ config S390
 	select HAVE_SYSCALL_TRACEPOINTS
 	select HAVE_VIRT_CPU_ACCOUNTING
 	select HAVE_VIRT_CPU_ACCOUNTING_IDLE
+	select HOTPLUG_SMT
 	select IOMMU_HELPER		if PCI
 	select IOMMU_SUPPORT		if PCI
 	select KASAN_VMALLOC if KASAN

arch/s390/Makefile

@@ -15,7 +15,7 @@ KBUILD_CFLAGS_MODULE += -fPIC
 KBUILD_AFLAGS	+= -m64
 KBUILD_CFLAGS	+= -m64
 KBUILD_CFLAGS	+= -fPIC
-LDFLAGS_vmlinux	:= -no-pie --emit-relocs --discard-none
+LDFLAGS_vmlinux	:= $(call ld-option,-no-pie) --emit-relocs --discard-none
 extra_tools	:= relocs
 aflags_dwarf	:= -Wa,-gdwarf-2
 KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__

arch/s390/include/asm/kvm_host.h

@@ -20,14 +20,13 @@
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/mmu_notifier.h>
+#include <asm/kvm_host_types.h>
 #include <asm/debug.h>
 #include <asm/cpu.h>
 #include <asm/fpu.h>
 #include <asm/isc.h>
 #include <asm/guarded_storage.h>
 
-#define KVM_S390_BSCA_CPU_SLOTS 64
-#define KVM_S390_ESCA_CPU_SLOTS 248
 #define KVM_MAX_VCPUS 255
 
 #define KVM_INTERNAL_MEM_SLOTS 1
@@ -51,342 +50,6 @@
 #define KVM_REQ_REFRESH_GUEST_PREFIX	\
 	KVM_ARCH_REQ_FLAGS(6, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
 
-#define SIGP_CTRL_C		0x80
-#define SIGP_CTRL_SCN_MASK	0x3f
-
-union bsca_sigp_ctrl {
-	__u8 value;
-	struct {
-		__u8 c : 1;
-		__u8 r : 1;
-		__u8 scn : 6;
-	};
-};
-
-union esca_sigp_ctrl {
-	__u16 value;
-	struct {
-		__u8 c : 1;
-		__u8 reserved: 7;
-		__u8 scn;
-	};
-};
-
-struct esca_entry {
-	union esca_sigp_ctrl sigp_ctrl;
-	__u16   reserved1[3];
-	__u64   sda;
-	__u64   reserved2[6];
-};
-
-struct bsca_entry {
-	__u8	reserved0;
-	union bsca_sigp_ctrl	sigp_ctrl;
-	__u16	reserved[3];
-	__u64	sda;
-	__u64	reserved2[2];
-};
-
-union ipte_control {
-	unsigned long val;
-	struct {
-		unsigned long k  : 1;
-		unsigned long kh : 31;
-		unsigned long kg : 32;
-	};
-};
-
-/*
- * Utility is defined as two bytes but having it four bytes wide
- * generates more efficient code. Since the following bytes are
- * reserved this makes no functional difference.
- */
-union sca_utility {
-	__u32 val;
-	struct {
-		__u32 mtcr : 1;
-		__u32	   : 31;
-	};
-};
-
-struct bsca_block {
-	union ipte_control ipte_control;
-	__u64	reserved[5];
-	__u64	mcn;
-	union sca_utility utility;
-	__u8	reserved2[4];
-	struct bsca_entry cpu[KVM_S390_BSCA_CPU_SLOTS];
-};
-
-struct esca_block {
-	union ipte_control ipte_control;
-	__u64   reserved1[6];
-	union sca_utility utility;
-	__u8	reserved2[4];
-	__u64   mcn[4];
-	__u64   reserved3[20];
-	struct esca_entry cpu[KVM_S390_ESCA_CPU_SLOTS];
-};
-
-/*
- * This struct is used to store some machine check info from lowcore
- * for machine checks that happen while the guest is running.
- * This info in host's lowcore might be overwritten by a second machine
- * check from host when host is in the machine check's high-level handling.
- * The size is 24 bytes.
- */
-struct mcck_volatile_info {
-	__u64 mcic;
-	__u64 failing_storage_address;
-	__u32 ext_damage_code;
-	__u32 reserved;
-};
-
-#define CR0_INITIAL_MASK (CR0_UNUSED_56 | CR0_INTERRUPT_KEY_SUBMASK | \
-			  CR0_MEASUREMENT_ALERT_SUBMASK)
-#define CR14_INITIAL_MASK (CR14_UNUSED_32 | CR14_UNUSED_33 | \
-			   CR14_EXTERNAL_DAMAGE_SUBMASK)
-
-#define SIDAD_SIZE_MASK		0xff
-#define sida_addr(sie_block) phys_to_virt((sie_block)->sidad & PAGE_MASK)
-#define sida_size(sie_block) \
-	((((sie_block)->sidad & SIDAD_SIZE_MASK) + 1) * PAGE_SIZE)
-
-#define CPUSTAT_STOPPED    0x80000000
-#define CPUSTAT_WAIT       0x10000000
-#define CPUSTAT_ECALL_PEND 0x08000000
-#define CPUSTAT_STOP_INT   0x04000000
-#define CPUSTAT_IO_INT     0x02000000
-#define CPUSTAT_EXT_INT    0x01000000
-#define CPUSTAT_RUNNING    0x00800000
-#define CPUSTAT_RETAINED   0x00400000
-#define CPUSTAT_TIMING_SUB 0x00020000
-#define CPUSTAT_SIE_SUB    0x00010000
-#define CPUSTAT_RRF        0x00008000
-#define CPUSTAT_SLSV       0x00004000
-#define CPUSTAT_SLSR       0x00002000
-#define CPUSTAT_ZARCH      0x00000800
-#define CPUSTAT_MCDS       0x00000100
-#define CPUSTAT_KSS        0x00000200
-#define CPUSTAT_SM         0x00000080
-#define CPUSTAT_IBS        0x00000040
-#define CPUSTAT_GED2       0x00000010
-#define CPUSTAT_G          0x00000008
-#define CPUSTAT_GED        0x00000004
-#define CPUSTAT_J          0x00000002
-#define CPUSTAT_P          0x00000001
-
-struct kvm_s390_sie_block {
-	atomic_t cpuflags;		/* 0x0000 */
-	__u32 : 1;			/* 0x0004 */
-	__u32 prefix : 18;
-	__u32 : 1;
-	__u32 ibc : 12;
-	__u8	reserved08[4];		/* 0x0008 */
-#define PROG_IN_SIE (1<<0)
-	__u32	prog0c;			/* 0x000c */
-	union {
-		__u8	reserved10[16];		/* 0x0010 */
-		struct {
-			__u64	pv_handle_cpu;
-			__u64	pv_handle_config;
-		};
-	};
-#define PROG_BLOCK_SIE	(1<<0)
-#define PROG_REQUEST	(1<<1)
-	atomic_t prog20;		/* 0x0020 */
-	__u8	reserved24[4];		/* 0x0024 */
-	__u64	cputm;			/* 0x0028 */
-	__u64	ckc;			/* 0x0030 */
-	__u64	epoch;			/* 0x0038 */
-	__u32	svcc;			/* 0x0040 */
-#define LCTL_CR0	0x8000
-#define LCTL_CR6	0x0200
-#define LCTL_CR9	0x0040
-#define LCTL_CR10	0x0020
-#define LCTL_CR11	0x0010
-#define LCTL_CR14	0x0002
-	__u16   lctl;			/* 0x0044 */
-	__s16	icpua;			/* 0x0046 */
-#define ICTL_OPEREXC	0x80000000
-#define ICTL_PINT	0x20000000
-#define ICTL_LPSW	0x00400000
-#define ICTL_STCTL	0x00040000
-#define ICTL_ISKE	0x00004000
-#define ICTL_SSKE	0x00002000
-#define ICTL_RRBE	0x00001000
-#define ICTL_TPROT	0x00000200
-	__u32	ictl;			/* 0x0048 */
-#define ECA_CEI		0x80000000
-#define ECA_IB		0x40000000
-#define ECA_SIGPI	0x10000000
-#define ECA_MVPGI	0x01000000
-#define ECA_AIV		0x00200000
-#define ECA_VX		0x00020000
-#define ECA_PROTEXCI	0x00002000
-#define ECA_APIE	0x00000008
-#define ECA_SII		0x00000001
-	__u32	eca;			/* 0x004c */
-#define ICPT_INST	0x04
-#define ICPT_PROGI	0x08
-#define ICPT_INSTPROGI	0x0C
-#define ICPT_EXTREQ	0x10
-#define ICPT_EXTINT	0x14
-#define ICPT_IOREQ	0x18
-#define ICPT_WAIT	0x1c
-#define ICPT_VALIDITY	0x20
-#define ICPT_STOP	0x28
-#define ICPT_OPEREXC	0x2C
-#define ICPT_PARTEXEC	0x38
-#define ICPT_IOINST	0x40
-#define ICPT_KSS	0x5c
-#define ICPT_MCHKREQ	0x60
-#define ICPT_INT_ENABLE	0x64
-#define ICPT_PV_INSTR	0x68
-#define ICPT_PV_NOTIFY	0x6c
-#define ICPT_PV_PREF	0x70
-	__u8	icptcode;		/* 0x0050 */
-	__u8	icptstatus;		/* 0x0051 */
-	__u16	ihcpu;			/* 0x0052 */
-	__u8	reserved54;		/* 0x0054 */
-#define IICTL_CODE_NONE		 0x00
-#define IICTL_CODE_MCHK		 0x01
-#define IICTL_CODE_EXT		 0x02
-#define IICTL_CODE_IO		 0x03
-#define IICTL_CODE_RESTART	 0x04
-#define IICTL_CODE_SPECIFICATION 0x10
-#define IICTL_CODE_OPERAND	 0x11
-	__u8	iictl;			/* 0x0055 */
-	__u16	ipa;			/* 0x0056 */
-	__u32	ipb;			/* 0x0058 */
-	__u32	scaoh;			/* 0x005c */
-#define FPF_BPBC 	0x20
-	__u8	fpf;			/* 0x0060 */
-#define ECB_GS		0x40
-#define ECB_TE		0x10
-#define ECB_SPECI	0x08
-#define ECB_SRSI	0x04
-#define ECB_HOSTPROTINT	0x02
-#define ECB_PTF		0x01
-	__u8	ecb;			/* 0x0061 */
-#define ECB2_CMMA	0x80
-#define ECB2_IEP	0x20
-#define ECB2_PFMFI	0x08
-#define ECB2_ESCA	0x04
-#define ECB2_ZPCI_LSI	0x02
-	__u8    ecb2;                   /* 0x0062 */
-#define ECB3_AISI	0x20
-#define ECB3_AISII	0x10
-#define ECB3_DEA 0x08
-#define ECB3_AES 0x04
-#define ECB3_RI  0x01
-	__u8    ecb3;			/* 0x0063 */
-#define ESCA_SCAOL_MASK ~0x3fU
-	__u32	scaol;			/* 0x0064 */
-	__u8	sdf;			/* 0x0068 */
-	__u8    epdx;			/* 0x0069 */
-	__u8	cpnc;			/* 0x006a */
-	__u8	reserved6b;		/* 0x006b */
-	__u32	todpr;			/* 0x006c */
-#define GISA_FORMAT1 0x00000001
-	__u32	gd;			/* 0x0070 */
-	__u8	reserved74[12];		/* 0x0074 */
-	__u64	mso;			/* 0x0080 */
-	__u64	msl;			/* 0x0088 */
-	psw_t	gpsw;			/* 0x0090 */
-	__u64	gg14;			/* 0x00a0 */
-	__u64	gg15;			/* 0x00a8 */
-	__u8	reservedb0[8];		/* 0x00b0 */
-#define HPID_KVM	0x4
-#define HPID_VSIE	0x5
-	__u8	hpid;			/* 0x00b8 */
-	__u8	reservedb9[7];		/* 0x00b9 */
-	union {
-		struct {
-			__u32	eiparams;	/* 0x00c0 */
-			__u16	extcpuaddr;	/* 0x00c4 */
-			__u16	eic;		/* 0x00c6 */
-		};
-		__u64	mcic;			/* 0x00c0 */
-	} __packed;
-	__u32	reservedc8;		/* 0x00c8 */
-	union {
-		struct {
-			__u16	pgmilc;		/* 0x00cc */
-			__u16	iprcc;		/* 0x00ce */
-		};
-		__u32	edc;			/* 0x00cc */
-	} __packed;
-	union {
-		struct {
-			__u32	dxc;		/* 0x00d0 */
-			__u16	mcn;		/* 0x00d4 */
-			__u8	perc;		/* 0x00d6 */
-			__u8	peratmid;	/* 0x00d7 */
-		};
-		__u64	faddr;			/* 0x00d0 */
-	} __packed;
-	__u64	peraddr;		/* 0x00d8 */
-	__u8	eai;			/* 0x00e0 */
-	__u8	peraid;			/* 0x00e1 */
-	__u8	oai;			/* 0x00e2 */
-	__u8	armid;			/* 0x00e3 */
-	__u8	reservede4[4];		/* 0x00e4 */
-	union {
-		__u64	tecmc;		/* 0x00e8 */
-		struct {
-			__u16	subchannel_id;	/* 0x00e8 */
-			__u16	subchannel_nr;	/* 0x00ea */
-			__u32	io_int_parm;	/* 0x00ec */
-			__u32	io_int_word;	/* 0x00f0 */
-		};
-	} __packed;
-	__u8	reservedf4[8];		/* 0x00f4 */
-#define CRYCB_FORMAT_MASK 0x00000003
-#define CRYCB_FORMAT0 0x00000000
-#define CRYCB_FORMAT1 0x00000001
-#define CRYCB_FORMAT2 0x00000003
-	__u32	crycbd;			/* 0x00fc */
-	__u64	gcr[16];		/* 0x0100 */
-	union {
-		__u64	gbea;		/* 0x0180 */
-		__u64	sidad;
-	};
-	__u8    reserved188[8];		/* 0x0188 */
-	__u64   sdnxo;			/* 0x0190 */
-	__u8    reserved198[8];		/* 0x0198 */
-	__u32	fac;			/* 0x01a0 */
-	__u8	reserved1a4[20];	/* 0x01a4 */
-	__u64	cbrlo;			/* 0x01b8 */
-	__u8	reserved1c0[8];		/* 0x01c0 */
-#define ECD_HOSTREGMGMT	0x20000000
-#define ECD_MEF		0x08000000
-#define ECD_ETOKENF	0x02000000
-#define ECD_ECC		0x00200000
-#define ECD_HMAC	0x00004000
-	__u32	ecd;			/* 0x01c8 */
-	__u8	reserved1cc[18];	/* 0x01cc */
-	__u64	pp;			/* 0x01de */
-	__u8	reserved1e6[2];		/* 0x01e6 */
-	__u64	itdba;			/* 0x01e8 */
-	__u64   riccbd;			/* 0x01f0 */
-	__u64	gvrd;			/* 0x01f8 */
-} __packed __aligned(512);
-
-struct kvm_s390_itdb {
-	__u8	data[256];
-};
-
-struct sie_page {
-	struct kvm_s390_sie_block sie_block;
-	struct mcck_volatile_info mcck_info;	/* 0x0200 */
-	__u8 reserved218[360];		/* 0x0218 */
-	__u64 pv_grregs[16];		/* 0x0380 */
-	__u8 reserved400[512];		/* 0x0400 */
-	struct kvm_s390_itdb itdb;	/* 0x0600 */
-	__u8 reserved700[2304];		/* 0x0700 */
-};
-
 struct kvm_vcpu_stat {
 	struct kvm_vcpu_stat_generic generic;
 	u64 exit_userspace;