Merging upstream version 6.8.9.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 95 insertions, 48 deletions

diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h
index 40c2b82f08..43ac4a64f4 100644
--- a/arch/s390/include/asm/ap.h
+++ b/arch/s390/include/asm/ap.h
@@ -88,7 +88,7 @@ static inline bool ap_instructions_available(void)
 }
 
 /* TAPQ register GR2 response struct */
-struct ap_tapq_gr2 {
+struct ap_tapq_hwinfo {
 	union {
 		unsigned long value;
 		struct {
@@ -96,11 +96,13 @@ struct ap_tapq_gr2 {
 			unsigned int apinfo : 32; /* ap type, ... */
 		};
 		struct {
-			unsigned int s	   :  1; /* APSC */
-			unsigned int m	   :  1; /* AP4KM */
-			unsigned int c	   :  1; /* AP4KC */
-			unsigned int mode  :  3;
-			unsigned int n	   :  1; /* APXA */
+			unsigned int apsc  :  1; /* APSC */
+			unsigned int mex4k :  1; /* AP4KM */
+			unsigned int crt4k :  1; /* AP4KC */
+			unsigned int cca   :  1; /* D */
+			unsigned int accel :  1; /* A */
+			unsigned int ep11  :  1; /* X */
+			unsigned int apxa  :  1; /* APXA */
 			unsigned int	   :  1;
 			unsigned int class :  8;
 			unsigned int bs	   :  2; /* SE bind/assoc */
@@ -126,11 +128,12 @@ struct ap_tapq_gr2 {
 /**
  * ap_tapq(): Test adjunct processor queue.
  * @qid: The AP queue number
- * @info: Pointer to queue descriptor
+ * @info: Pointer to tapq hwinfo struct
  *
  * Returns AP queue status structure.
  */
-static inline struct ap_queue_status ap_tapq(ap_qid_t qid, struct ap_tapq_gr2 *info)
+static inline struct ap_queue_status ap_tapq(ap_qid_t qid,
+					     struct ap_tapq_hwinfo *info)
 {
 	union ap_queue_status_reg reg1;
 	unsigned long reg2;
@@ -158,7 +161,7 @@ static inline struct ap_queue_status ap_tapq(ap_qid_t qid, struct ap_tapq_gr2 *i
  * Returns AP queue status structure.
  */
 static inline struct ap_queue_status ap_test_queue(ap_qid_t qid, int tbit,
-						   struct ap_tapq_gr2 *info)
+						   struct ap_tapq_hwinfo *info)
 {
 	if (tbit)
 		qid |= 1UL << 23; /* set T bit*/
diff --git a/arch/s390/include/asm/ctlreg.h b/arch/s390/include/asm/ctlreg.h
index 6d4b85f2b5..72a9556d04 100644
--- a/arch/s390/include/asm/ctlreg.h
+++ b/arch/s390/include/asm/ctlreg.h
@@ -141,22 +141,26 @@ static __always_inline void local_ctl_store(unsigned int cr, struct ctlreg *reg)
 		: [cr] "i" (cr));
 }
 
-static __always_inline void local_ctl_set_bit(unsigned int cr, unsigned int bit)
+static __always_inline struct ctlreg local_ctl_set_bit(unsigned int cr, unsigned int bit)
 {
-	struct ctlreg reg;
+	struct ctlreg new, old;
 
-	local_ctl_store(cr, &reg);
-	reg.val |= 1UL << bit;
-	local_ctl_load(cr, &reg);
+	local_ctl_store(cr, &old);
+	new = old;
+	new.val |= 1UL << bit;
+	local_ctl_load(cr, &new);
+	return old;
 }
 
-static __always_inline void local_ctl_clear_bit(unsigned int cr, unsigned int bit)
+static __always_inline struct ctlreg local_ctl_clear_bit(unsigned int cr, unsigned int bit)
 {
-	struct ctlreg reg;
+	struct ctlreg new, old;
 
-	local_ctl_store(cr, &reg);
-	reg.val &= ~(1UL << bit);
-	local_ctl_load(cr, &reg);
+	local_ctl_store(cr, &old);
+	new = old;
+	new.val &= ~(1UL << bit);
+	local_ctl_load(cr, &new);
+	return old;
 }
 
 struct lowcore;
diff --git a/arch/s390/include/asm/facility.h b/arch/s390/include/asm/facility.h
index 94b6919026..796007125d 100644
--- a/arch/s390/include/asm/facility.h
+++ b/arch/s390/include/asm/facility.h
@@ -111,4 +111,10 @@ static inline void stfle(u64 *stfle_fac_list, int size)
 	preempt_enable();
 }
 
+/**
+ * stfle_size - Actual size of the facility list as specified by stfle
+ * (number of double words)
+ */
+unsigned int stfle_size(void);
+
 #endif /* __ASM_FACILITY_H */
diff --git a/arch/s390/include/asm/fpu/api.h b/arch/s390/include/asm/fpu/api.h
index 9acf48e53a..d6ca8bc6ca 100644
--- a/arch/s390/include/asm/fpu/api.h
+++ b/arch/s390/include/asm/fpu/api.h
@@ -46,26 +46,33 @@
 
 #include <linux/preempt.h>
 #include <asm/asm-extable.h>
+#include <asm/fpu/internal.h>
 
 void save_fpu_regs(void);
 void load_fpu_regs(void);
 void __load_fpu_regs(void);
 
-static inline int test_fp_ctl(u32 fpc)
+/**
+ * sfpc_safe - Set floating point control register safely.
+ * @fpc: new value for floating point control register
+ *
+ * Set floating point control register. This may lead to an exception,
+ * since a saved value may have been modified by user space (ptrace,
+ * signal return, kvm registers) to an invalid value. In such a case
+ * set the floating point control register to zero.
+ */
+static inline void sfpc_safe(u32 fpc)
 {
-	u32 orig_fpc;
-	int rc;
-
-	asm volatile(
-		"	efpc    %1\n"
-		"	sfpc	%2\n"
-		"0:	sfpc	%1\n"
-		"	la	%0,0\n"
-		"1:\n"
-		EX_TABLE(0b,1b)
-		: "=d" (rc), "=&d" (orig_fpc)
-		: "d" (fpc), "0" (-EINVAL));
-	return rc;
+	asm volatile("\n"
+		"0:	sfpc	%[fpc]\n"
+		"1:	nopr	%%r7\n"
+		".pushsection .fixup, \"ax\"\n"
+		"2:	lghi	%[fpc],0\n"
+		"	jg	0b\n"
+		".popsection\n"
+		EX_TABLE(1b, 2b)
+		: [fpc] "+d" (fpc)
+		: : "memory");
 }
 
 #define KERNEL_FPC		1
diff --git a/arch/s390/include/asm/fpu/internal.h b/arch/s390/include/asm/fpu/internal.h
index 8634581b90..d511c4cf5a 100644
--- a/arch/s390/include/asm/fpu/internal.h
+++ b/arch/s390/include/asm/fpu/internal.h
@@ -10,8 +10,14 @@
 #define _ASM_S390_FPU_INTERNAL_H
 
 #include <linux/string.h>
+#include <asm/facility.h>
 #include <asm/fpu/types.h>
 
+static inline bool cpu_has_vx(void)
+{
+	return likely(test_facility(129));
+}
+
 static inline void save_vx_regs(__vector128 *vxrs)
 {
 	asm volatile(
@@ -41,7 +47,7 @@ static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu)
 {
 	fpregs->pad = 0;
 	fpregs->fpc = fpu->fpc;
-	if (MACHINE_HAS_VX)
+	if (cpu_has_vx())
 		convert_vx_to_fp((freg_t *)&fpregs->fprs, fpu->vxrs);
 	else
 		memcpy((freg_t *)&fpregs->fprs, fpu->fprs,
@@ -51,7 +57,7 @@ static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu)
 static inline void fpregs_load(_s390_fp_regs *fpregs, struct fpu *fpu)
 {
 	fpu->fpc = fpregs->fpc;
-	if (MACHINE_HAS_VX)
+	if (cpu_has_vx())
 		convert_fp_to_vx(fpu->vxrs, (freg_t *)&fpregs->fprs);
 	else
 		memcpy(fpu->fprs, (freg_t *)&fpregs->fprs,
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index 67a298b6cf..52664105a4 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -818,7 +818,7 @@ struct s390_io_adapter {
 
 struct kvm_s390_cpu_model {
 	/* facility mask supported by kvm & hosting machine */
-	__u64 fac_mask[S390_ARCH_FAC_LIST_SIZE_U64];
+	__u64 fac_mask[S390_ARCH_FAC_MASK_SIZE_U64];
 	struct kvm_s390_vm_cpu_subfunc subfuncs;
 	/* facility list requested by guest (in dma page) */
 	__u64 *fac_list;
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 601e87fa8a..12a7b86789 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -730,7 +730,7 @@ static inline int pud_bad(pud_t pud)
 {
 	unsigned long type = pud_val(pud) & _REGION_ENTRY_TYPE_MASK;
 
-	if (type > _REGION_ENTRY_TYPE_R3 || pud_large(pud))
+	if (type > _REGION_ENTRY_TYPE_R3 || pud_leaf(pud))
 		return 1;
 	if (type < _REGION_ENTRY_TYPE_R3)
 		return 0;
@@ -770,6 +770,7 @@ static inline int pud_write(pud_t pud)
 	return (pud_val(pud) & _REGION3_ENTRY_WRITE) != 0;
 }
 
+#define pmd_dirty pmd_dirty
 static inline int pmd_dirty(pmd_t pmd)
 {
 	return (pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY) != 0;
@@ -1397,7 +1398,7 @@ static inline unsigned long pud_deref(pud_t pud)
 	unsigned long origin_mask;
 
 	origin_mask = _REGION_ENTRY_ORIGIN;
-	if (pud_large(pud))
+	if (pud_leaf(pud))
 		origin_mask = _REGION3_ENTRY_ORIGIN_LARGE;
 	return (unsigned long)__va(pud_val(pud) & origin_mask);
 }
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index c15eadbb99..c0b6e74d89 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -184,11 +184,7 @@ struct thread_struct {
 	struct gs_cb *gs_cb;			/* Current guarded storage cb */
 	struct gs_cb *gs_bc_cb;			/* Broadcast guarded storage cb */
 	struct pgm_tdb trap_tdb;		/* Transaction abort diagnose block */
-	/*
-	 * Warning: 'fpu' is dynamically-sized. It *MUST* be at
-	 * the end.
-	 */
-	struct fpu fpu;			/* FP and VX register save area */
+	struct fpu fpu;				/* FP and VX register save area */
 };
 
 /* Flag to disable transactions. */
@@ -331,14 +327,36 @@ static inline unsigned long __extract_psw(void)
 	return (((unsigned long) reg1) << 32) | ((unsigned long) reg2);
 }
 
-static inline void local_mcck_enable(void)
+static inline unsigned long __local_mcck_save(void)
 {
-	__load_psw_mask(__extract_psw() | PSW_MASK_MCHECK);
+	unsigned long mask = __extract_psw();
+
+	__load_psw_mask(mask & ~PSW_MASK_MCHECK);
+	return mask & PSW_MASK_MCHECK;
+}
+
+#define local_mcck_save(mflags)			\
+do {						\
+	typecheck(unsigned long, mflags);	\
+	mflags = __local_mcck_save();		\
+} while (0)
+
+static inline void local_mcck_restore(unsigned long mflags)
+{
+	unsigned long mask = __extract_psw();
+
+	mask &= ~PSW_MASK_MCHECK;
+	__load_psw_mask(mask | mflags);
 }
 
 static inline void local_mcck_disable(void)
 {
-	__load_psw_mask(__extract_psw() & ~PSW_MASK_MCHECK);
+	__local_mcck_save();
+}
+
+static inline void local_mcck_enable(void)
+{
+	__load_psw_mask(__extract_psw() | PSW_MASK_MCHECK);
 }
 
 /*
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index df316436d2..03bcaa8eff 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -28,7 +28,6 @@
 #define MACHINE_FLAG_TOPOLOGY	BIT(10)
 #define MACHINE_FLAG_TE		BIT(11)
 #define MACHINE_FLAG_TLB_LC	BIT(12)
-#define MACHINE_FLAG_VX		BIT(13)
 #define MACHINE_FLAG_TLB_GUEST	BIT(14)
 #define MACHINE_FLAG_NX		BIT(15)
 #define MACHINE_FLAG_GS		BIT(16)
@@ -90,7 +89,6 @@ extern unsigned long mio_wb_bit_mask;
 #define MACHINE_HAS_TOPOLOGY	(S390_lowcore.machine_flags & MACHINE_FLAG_TOPOLOGY)
 #define MACHINE_HAS_TE		(S390_lowcore.machine_flags & MACHINE_FLAG_TE)
 #define MACHINE_HAS_TLB_LC	(S390_lowcore.machine_flags & MACHINE_FLAG_TLB_LC)
-#define MACHINE_HAS_VX		(S390_lowcore.machine_flags & MACHINE_FLAG_VX)
 #define MACHINE_HAS_TLB_GUEST	(S390_lowcore.machine_flags & MACHINE_FLAG_TLB_GUEST)
 #define MACHINE_HAS_NX		(S390_lowcore.machine_flags & MACHINE_FLAG_NX)
 #define MACHINE_HAS_GS		(S390_lowcore.machine_flags & MACHINE_FLAG_GS)
diff --git a/arch/s390/include/asm/sysinfo.h b/arch/s390/include/asm/sysinfo.h
index ab1c631605..edca5a751d 100644
--- a/arch/s390/include/asm/sysinfo.h
+++ b/arch/s390/include/asm/sysinfo.h
@@ -40,6 +40,10 @@ struct sysinfo_1_1_1 {
 	unsigned int ncr;
 	unsigned int npr;
 	unsigned int ntr;
+	char reserved_3[4];
+	char model_var_cap[16];
+	unsigned int model_var_cap_rating;
+	unsigned int nvr;
 };
 
 struct sysinfo_1_2_1 {