diff options
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/dat-bits.h | 32 | ||||
| -rw-r--r-- | arch/s390/include/asm/gmap.h | 174 | ||||
| -rw-r--r-- | arch/s390/include/asm/gmap_helpers.h | 1 | ||||
| -rw-r--r-- | arch/s390/include/asm/hugetlb.h | 6 | ||||
| -rw-r--r-- | arch/s390/include/asm/kvm_host.h | 7 | ||||
| -rw-r--r-- | arch/s390/include/asm/mmu.h | 13 | ||||
| -rw-r--r-- | arch/s390/include/asm/mmu_context.h | 6 | ||||
| -rw-r--r-- | arch/s390/include/asm/page.h | 4 | ||||
| -rw-r--r-- | arch/s390/include/asm/pgalloc.h | 4 | ||||
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 171 | ||||
| -rw-r--r-- | arch/s390/include/asm/tlb.h | 3 | ||||
| -rw-r--r-- | arch/s390/include/asm/uaccess.h | 70 | ||||
| -rw-r--r-- | arch/s390/include/asm/uv.h | 3 |
13 files changed, 72 insertions, 422 deletions
diff --git a/arch/s390/include/asm/dat-bits.h b/arch/s390/include/asm/dat-bits.h index 8d65eec2f124..c40874e0e426 100644 --- a/arch/s390/include/asm/dat-bits.h +++ b/arch/s390/include/asm/dat-bits.h @@ -9,6 +9,32 @@ #ifndef _S390_DAT_BITS_H #define _S390_DAT_BITS_H +/* + * vaddress union in order to easily decode a virtual address into its + * region first index, region second index etc. parts. + */ +union vaddress { + unsigned long addr; + struct { + unsigned long rfx : 11; + unsigned long rsx : 11; + unsigned long rtx : 11; + unsigned long sx : 11; + unsigned long px : 8; + unsigned long bx : 12; + }; + struct { + unsigned long rfx01 : 2; + unsigned long : 9; + unsigned long rsx01 : 2; + unsigned long : 9; + unsigned long rtx01 : 2; + unsigned long : 9; + unsigned long sx01 : 2; + unsigned long : 29; + }; +}; + union asce { unsigned long val; struct { @@ -98,7 +124,8 @@ union region3_table_entry { struct { unsigned long : 53; unsigned long fc: 1; /* Format-Control */ - unsigned long : 4; + unsigned long p : 1; /* DAT-Protection Bit */ + unsigned long : 3; unsigned long i : 1; /* Region-Invalid Bit */ unsigned long cr: 1; /* Common-Region Bit */ unsigned long tt: 2; /* Table-Type Bits */ @@ -140,7 +167,8 @@ union segment_table_entry { struct { unsigned long : 53; unsigned long fc: 1; /* Format-Control */ - unsigned long : 4; + 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 */ diff --git a/arch/s390/include/asm/gmap.h b/arch/s390/include/asm/gmap.h deleted file mode 100644 index 66c5808fd011..000000000000 --- a/arch/s390/include/asm/gmap.h +++ /dev/null @@ -1,174 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * KVM guest address space mapping code - * - * Copyright IBM Corp. 2007, 2016 - * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> - */ - -#ifndef _ASM_S390_GMAP_H -#define _ASM_S390_GMAP_H - -#include <linux/radix-tree.h> -#include <linux/refcount.h> - -/* Generic bits for GMAP notification on DAT table entry changes. */ -#define GMAP_NOTIFY_SHADOW 0x2 -#define GMAP_NOTIFY_MPROT 0x1 - -/* Status bits only for huge segment entries */ -#define _SEGMENT_ENTRY_GMAP_IN 0x0800 /* invalidation notify bit */ -#define _SEGMENT_ENTRY_GMAP_UC 0x0002 /* dirty (migration) */ - -/** - * struct gmap_struct - guest address space - * @list: list head for the mm->context gmap list - * @mm: pointer to the parent mm_struct - * @guest_to_host: radix tree with guest to host address translation - * @host_to_guest: radix tree with pointer to segment table entries - * @guest_table_lock: spinlock to protect all entries in the guest page table - * @ref_count: reference counter for the gmap structure - * @table: pointer to the page directory - * @asce: address space control element for gmap page table - * @pfault_enabled: defines if pfaults are applicable for the guest - * @guest_handle: protected virtual machine handle for the ultravisor - * @host_to_rmap: radix tree with gmap_rmap lists - * @children: list of shadow gmap structures - * @shadow_lock: spinlock to protect the shadow gmap list - * @parent: pointer to the parent gmap for shadow guest address spaces - * @orig_asce: ASCE for which the shadow page table has been created - * @edat_level: edat level to be used for the shadow translation - * @removed: flag to indicate if a shadow guest address space has been removed - * @initialized: flag to indicate if a shadow guest address space can be used - */ -struct gmap { - struct list_head list; - struct mm_struct *mm; - struct radix_tree_root guest_to_host; - struct radix_tree_root host_to_guest; - spinlock_t guest_table_lock; - refcount_t ref_count; - unsigned long *table; - unsigned long asce; - unsigned long asce_end; - void *private; - bool pfault_enabled; - /* only set for protected virtual machines */ - unsigned long guest_handle; - /* Additional data for shadow guest address spaces */ - struct radix_tree_root host_to_rmap; - struct list_head children; - spinlock_t shadow_lock; - struct gmap *parent; - unsigned long orig_asce; - int edat_level; - bool removed; - bool initialized; -}; - -/** - * struct gmap_rmap - reverse mapping for shadow page table entries - * @next: pointer to next rmap in the list - * @raddr: virtual rmap address in the shadow guest address space - */ -struct gmap_rmap { - struct gmap_rmap *next; - unsigned long raddr; -}; - -#define gmap_for_each_rmap(pos, head) \ - for (pos = (head); pos; pos = pos->next) - -#define gmap_for_each_rmap_safe(pos, n, head) \ - for (pos = (head); n = pos ? pos->next : NULL, pos; pos = n) - -/** - * struct gmap_notifier - notify function block for page invalidation - * @notifier_call: address of callback function - */ -struct gmap_notifier { - struct list_head list; - struct rcu_head rcu; - void (*notifier_call)(struct gmap *gmap, unsigned long start, - unsigned long end); -}; - -static inline int gmap_is_shadow(struct gmap *gmap) -{ - return !!gmap->parent; -} - -struct gmap *gmap_create(struct mm_struct *mm, unsigned long limit); -void gmap_remove(struct gmap *gmap); -struct gmap *gmap_get(struct gmap *gmap); -void gmap_put(struct gmap *gmap); -void gmap_free(struct gmap *gmap); -struct gmap *gmap_alloc(unsigned long limit); - -int gmap_map_segment(struct gmap *gmap, unsigned long from, - unsigned long to, unsigned long len); -int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len); -unsigned long __gmap_translate(struct gmap *, unsigned long gaddr); -int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr); -void __gmap_zap(struct gmap *, unsigned long gaddr); -void gmap_unlink(struct mm_struct *, unsigned long *table, unsigned long vmaddr); - -int gmap_read_table(struct gmap *gmap, unsigned long gaddr, unsigned long *val); - -void gmap_unshadow(struct gmap *sg); -int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t, - int fake); -int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t, - int fake); -int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt, - int fake); -int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt, - int fake); -int gmap_shadow_page(struct gmap *sg, unsigned long saddr, pte_t pte); - -void gmap_register_pte_notifier(struct gmap_notifier *); -void gmap_unregister_pte_notifier(struct gmap_notifier *); - -int gmap_protect_one(struct gmap *gmap, unsigned long gaddr, int prot, unsigned long bits); - -void gmap_sync_dirty_log_pmd(struct gmap *gmap, unsigned long dirty_bitmap[4], - unsigned long gaddr, unsigned long vmaddr); -int s390_replace_asce(struct gmap *gmap); -void s390_uv_destroy_pfns(unsigned long count, unsigned long *pfns); -int __s390_uv_destroy_range(struct mm_struct *mm, unsigned long start, - unsigned long end, bool interruptible); -unsigned long *gmap_table_walk(struct gmap *gmap, unsigned long gaddr, int level); - -/** - * s390_uv_destroy_range - Destroy a range of pages in the given mm. - * @mm: the mm on which to operate on - * @start: the start of the range - * @end: the end of the range - * - * This function will call cond_sched, so it should not generate stalls, but - * it will otherwise only return when it completed. - */ -static inline void s390_uv_destroy_range(struct mm_struct *mm, unsigned long start, - unsigned long end) -{ - (void)__s390_uv_destroy_range(mm, start, end, false); -} - -/** - * s390_uv_destroy_range_interruptible - Destroy a range of pages in the - * given mm, but stop when a fatal signal is received. - * @mm: the mm on which to operate on - * @start: the start of the range - * @end: the end of the range - * - * This function will call cond_sched, so it should not generate stalls. If - * a fatal signal is received, it will return with -EINTR immediately, - * without finishing destroying the whole range. Upon successful - * completion, 0 is returned. - */ -static inline int s390_uv_destroy_range_interruptible(struct mm_struct *mm, unsigned long start, - unsigned long end) -{ - return __s390_uv_destroy_range(mm, start, end, true); -} -#endif /* _ASM_S390_GMAP_H */ diff --git a/arch/s390/include/asm/gmap_helpers.h b/arch/s390/include/asm/gmap_helpers.h index 5356446a61c4..2d3ae421077e 100644 --- a/arch/s390/include/asm/gmap_helpers.h +++ b/arch/s390/include/asm/gmap_helpers.h @@ -11,5 +11,6 @@ void gmap_helper_zap_one_page(struct mm_struct *mm, unsigned long vmaddr); void gmap_helper_discard(struct mm_struct *mm, unsigned long vmaddr, unsigned long end); int gmap_helper_disable_cow_sharing(void); +void gmap_helper_try_set_pte_unused(struct mm_struct *mm, unsigned long vmaddr); #endif /* _ASM_S390_GMAP_HELPERS_H */ diff --git a/arch/s390/include/asm/hugetlb.h b/arch/s390/include/asm/hugetlb.h index 69131736daaa..6983e52eaf81 100644 --- a/arch/s390/include/asm/hugetlb.h +++ b/arch/s390/include/asm/hugetlb.h @@ -37,12 +37,6 @@ static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, return __huge_ptep_get_and_clear(mm, addr, ptep); } -static inline void arch_clear_hugetlb_flags(struct folio *folio) -{ - clear_bit(PG_arch_1, &folio->flags.f); -} -#define arch_clear_hugetlb_flags arch_clear_hugetlb_flags - #define __HAVE_ARCH_HUGE_PTE_CLEAR static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep, unsigned long sz) diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index ae1223264d3c..64a50f0862aa 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -27,6 +27,7 @@ #include <asm/isc.h> #include <asm/guarded_storage.h> +#define KVM_HAVE_MMU_RWLOCK #define KVM_MAX_VCPUS 255 #define KVM_INTERNAL_MEM_SLOTS 1 @@ -441,6 +442,7 @@ struct kvm_vcpu_arch { bool acrs_loaded; struct kvm_s390_pv_vcpu pv; union diag318_info diag318_info; + struct kvm_s390_mmu_cache *mc; }; struct kvm_vm_stat { @@ -630,8 +632,12 @@ struct kvm_s390_pv { void *set_aside; struct list_head need_cleanup; struct mmu_notifier mmu_notifier; + /* Protects against concurrent import-like operations */ + struct mutex import_lock; }; +struct kvm_s390_mmu_cache; + struct kvm_arch { struct esca_block *sca; debug_info_t *dbf; @@ -671,6 +677,7 @@ struct kvm_arch { struct kvm_s390_pv pv; struct list_head kzdev_list; spinlock_t kzdev_list_lock; + struct kvm_s390_mmu_cache *mc; }; #define KVM_HVA_ERR_BAD (-1UL) diff --git a/arch/s390/include/asm/mmu.h b/arch/s390/include/asm/mmu.h index f07e49b419ab..d4fd7bf3692e 100644 --- a/arch/s390/include/asm/mmu.h +++ b/arch/s390/include/asm/mmu.h @@ -19,23 +19,10 @@ typedef struct { /* The mmu context belongs to a secure guest. */ atomic_t protected_count; /* - * The following bitfields need a down_write on the mm - * semaphore when they are written to. As they are only - * written once, they can be read without a lock. - */ - /* The mmu context uses extended page tables. */ - unsigned int has_pgste:1; - /* The mmu context uses storage keys. */ - unsigned int uses_skeys:1; - /* The mmu context uses CMM. */ - unsigned int uses_cmm:1; - /* * The mmu context allows COW-sharing of memory pages (KSM, zeropage). * Note that COW-sharing during fork() is currently always allowed. */ unsigned int allow_cow_sharing:1; - /* The gmaps associated with this context are allowed to use huge pages. */ - unsigned int allow_gmap_hpage_1m:1; } mm_context_t; #define INIT_MM_CONTEXT(name) \ diff --git a/arch/s390/include/asm/mmu_context.h b/arch/s390/include/asm/mmu_context.h index d9b8501bc93d..bd1ef5e2d2eb 100644 --- a/arch/s390/include/asm/mmu_context.h +++ b/arch/s390/include/asm/mmu_context.h @@ -29,12 +29,8 @@ static inline int init_new_context(struct task_struct *tsk, atomic_set(&mm->context.protected_count, 0); mm->context.gmap_asce = 0; mm->context.flush_mm = 0; -#ifdef CONFIG_PGSTE - mm->context.has_pgste = 0; - mm->context.uses_skeys = 0; - mm->context.uses_cmm = 0; +#if IS_ENABLED(CONFIG_KVM) mm->context.allow_cow_sharing = 1; - mm->context.allow_gmap_hpage_1m = 0; #endif switch (mm->context.asce_limit) { default: diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index c1d63b613bf9..6de2f4d25b63 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -78,7 +78,6 @@ static inline void copy_page(void *to, void *from) #ifdef STRICT_MM_TYPECHECKS typedef struct { unsigned long pgprot; } pgprot_t; -typedef struct { unsigned long pgste; } pgste_t; typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned long pmd; } pmd_t; typedef struct { unsigned long pud; } pud_t; @@ -94,7 +93,6 @@ static __always_inline unsigned long name ## _val(name ## _t name) \ #else /* STRICT_MM_TYPECHECKS */ typedef unsigned long pgprot_t; -typedef unsigned long pgste_t; typedef unsigned long pte_t; typedef unsigned long pmd_t; typedef unsigned long pud_t; @@ -110,7 +108,6 @@ static __always_inline unsigned long name ## _val(name ## _t name) \ #endif /* STRICT_MM_TYPECHECKS */ DEFINE_PGVAL_FUNC(pgprot) -DEFINE_PGVAL_FUNC(pgste) DEFINE_PGVAL_FUNC(pte) DEFINE_PGVAL_FUNC(pmd) DEFINE_PGVAL_FUNC(pud) @@ -120,7 +117,6 @@ DEFINE_PGVAL_FUNC(pgd) typedef pte_t *pgtable_t; #define __pgprot(x) ((pgprot_t) { (x) } ) -#define __pgste(x) ((pgste_t) { (x) } ) #define __pte(x) ((pte_t) { (x) } ) #define __pmd(x) ((pmd_t) { (x) } ) #define __pud(x) ((pud_t) { (x) } ) diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h index a16e65072371..a5de9e61ea9e 100644 --- a/arch/s390/include/asm/pgalloc.h +++ b/arch/s390/include/asm/pgalloc.h @@ -27,10 +27,6 @@ unsigned long *page_table_alloc_noprof(struct mm_struct *); #define page_table_alloc(...) alloc_hooks(page_table_alloc_noprof(__VA_ARGS__)) void page_table_free(struct mm_struct *, unsigned long *); -struct ptdesc *page_table_alloc_pgste_noprof(struct mm_struct *mm); -#define page_table_alloc_pgste(...) alloc_hooks(page_table_alloc_pgste_noprof(__VA_ARGS__)) -void page_table_free_pgste(struct ptdesc *ptdesc); - static inline void crst_table_init(unsigned long *crst, unsigned long entry) { memset64((u64 *)crst, entry, _CRST_ENTRIES); diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index bca9b29778c3..1c3c3be93be9 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -413,28 +413,6 @@ void setup_protection_map(void); * SW-bits: y young, d dirty, r read, w write */ -/* Page status table bits for virtualization */ -#define PGSTE_ACC_BITS 0xf000000000000000UL -#define PGSTE_FP_BIT 0x0800000000000000UL -#define PGSTE_PCL_BIT 0x0080000000000000UL -#define PGSTE_HR_BIT 0x0040000000000000UL -#define PGSTE_HC_BIT 0x0020000000000000UL -#define PGSTE_GR_BIT 0x0004000000000000UL -#define PGSTE_GC_BIT 0x0002000000000000UL -#define PGSTE_ST2_MASK 0x0000ffff00000000UL -#define PGSTE_UC_BIT 0x0000000000008000UL /* user dirty (migration) */ -#define PGSTE_IN_BIT 0x0000000000004000UL /* IPTE notify bit */ -#define PGSTE_VSIE_BIT 0x0000000000002000UL /* ref'd in a shadow table */ - -/* Guest Page State used for virtualization */ -#define _PGSTE_GPS_ZERO 0x0000000080000000UL -#define _PGSTE_GPS_NODAT 0x0000000040000000UL -#define _PGSTE_GPS_USAGE_MASK 0x0000000003000000UL -#define _PGSTE_GPS_USAGE_STABLE 0x0000000000000000UL -#define _PGSTE_GPS_USAGE_UNUSED 0x0000000001000000UL -#define _PGSTE_GPS_USAGE_POT_VOLATILE 0x0000000002000000UL -#define _PGSTE_GPS_USAGE_VOLATILE _PGSTE_GPS_USAGE_MASK - /* * A user page table pointer has the space-switch-event bit, the * private-space-control bit and the storage-alteration-event-control @@ -566,34 +544,15 @@ static inline bool mm_pmd_folded(struct mm_struct *mm) } #define mm_pmd_folded(mm) mm_pmd_folded(mm) -static inline int mm_has_pgste(struct mm_struct *mm) -{ -#ifdef CONFIG_PGSTE - if (unlikely(mm->context.has_pgste)) - return 1; -#endif - return 0; -} - static inline int mm_is_protected(struct mm_struct *mm) { -#ifdef CONFIG_PGSTE +#if IS_ENABLED(CONFIG_KVM) if (unlikely(atomic_read(&mm->context.protected_count))) return 1; #endif return 0; } -static inline pgste_t clear_pgste_bit(pgste_t pgste, unsigned long mask) -{ - return __pgste(pgste_val(pgste) & ~mask); -} - -static inline pgste_t set_pgste_bit(pgste_t pgste, unsigned long mask) -{ - return __pgste(pgste_val(pgste) | mask); -} - static inline pte_t clear_pte_bit(pte_t pte, pgprot_t prot) { return __pte(pte_val(pte) & ~pgprot_val(prot)); @@ -632,22 +591,13 @@ static inline pud_t set_pud_bit(pud_t pud, pgprot_t prot) #define mm_forbids_zeropage mm_forbids_zeropage static inline int mm_forbids_zeropage(struct mm_struct *mm) { -#ifdef CONFIG_PGSTE +#if IS_ENABLED(CONFIG_KVM) if (!mm->context.allow_cow_sharing) return 1; #endif return 0; } -static inline int mm_uses_skeys(struct mm_struct *mm) -{ -#ifdef CONFIG_PGSTE - if (mm->context.uses_skeys) - return 1; -#endif - return 0; -} - /** * cspg() - Compare and Swap and Purge (CSPG) * @ptr: Pointer to the value to be exchanged @@ -1136,6 +1086,13 @@ static inline pte_t pte_mkhuge(pte_t pte) } #endif +static inline unsigned long sske_frame(unsigned long addr, unsigned char skey) +{ + asm volatile("sske %[skey],%[addr],1" + : [addr] "+a" (addr) : [skey] "d" (skey)); + return addr; +} + #define IPTE_GLOBAL 0 #define IPTE_LOCAL 1 @@ -1232,7 +1189,7 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, res = ptep_xchg_lazy(mm, addr, ptep, __pte(_PAGE_INVALID)); /* At this point the reference through the mapping is still present */ if (mm_is_protected(mm) && pte_present(res)) - uv_convert_from_secure_pte(res); + WARN_ON_ONCE(uv_convert_from_secure_pte(res)); return res; } @@ -1250,7 +1207,7 @@ static inline pte_t ptep_clear_flush(struct vm_area_struct *vma, res = ptep_xchg_direct(vma->vm_mm, addr, ptep, __pte(_PAGE_INVALID)); /* At this point the reference through the mapping is still present */ if (mm_is_protected(vma->vm_mm) && pte_present(res)) - uv_convert_from_secure_pte(res); + WARN_ON_ONCE(uv_convert_from_secure_pte(res)); return res; } @@ -1287,9 +1244,10 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, /* * If something went wrong and the page could not be destroyed, or * if this is not a mm teardown, the slower export is used as - * fallback instead. + * fallback instead. If even that fails, print a warning and leak + * the page, to avoid crashing the whole system. */ - uv_convert_from_secure_pte(res); + WARN_ON_ONCE(uv_convert_from_secure_pte(res)); return res; } @@ -1348,50 +1306,13 @@ static inline int ptep_set_access_flags(struct vm_area_struct *vma, { if (pte_same(*ptep, entry)) return 0; - if (cpu_has_rdp() && !mm_has_pgste(vma->vm_mm) && pte_allow_rdp(*ptep, entry)) + if (cpu_has_rdp() && pte_allow_rdp(*ptep, entry)) ptep_reset_dat_prot(vma->vm_mm, addr, ptep, entry); else ptep_xchg_direct(vma->vm_mm, addr, ptep, entry); return 1; } -/* - * Additional functions to handle KVM guest page tables - */ -void ptep_set_pte_at(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t entry); -void ptep_set_notify(struct mm_struct *mm, unsigned long addr, pte_t *ptep); -void ptep_notify(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, unsigned long bits); -int ptep_force_prot(struct mm_struct *mm, unsigned long gaddr, - pte_t *ptep, int prot, unsigned long bit); -void ptep_zap_unused(struct mm_struct *mm, unsigned long addr, - pte_t *ptep , int reset); -void ptep_zap_key(struct mm_struct *mm, unsigned long addr, pte_t *ptep); -int ptep_shadow_pte(struct mm_struct *mm, unsigned long saddr, - pte_t *sptep, pte_t *tptep, pte_t pte); -void ptep_unshadow_pte(struct mm_struct *mm, unsigned long saddr, pte_t *ptep); - -bool ptep_test_and_clear_uc(struct mm_struct *mm, unsigned long address, - pte_t *ptep); -int set_guest_storage_key(struct mm_struct *mm, unsigned long addr, - unsigned char key, bool nq); -int cond_set_guest_storage_key(struct mm_struct *mm, unsigned long addr, - unsigned char key, unsigned char *oldkey, - bool nq, bool mr, bool mc); -int reset_guest_reference_bit(struct mm_struct *mm, unsigned long addr); -int get_guest_storage_key(struct mm_struct *mm, unsigned long addr, - unsigned char *key); - -int set_pgste_bits(struct mm_struct *mm, unsigned long addr, - unsigned long bits, unsigned long value); -int get_pgste(struct mm_struct *mm, unsigned long hva, unsigned long *pgstep); -int pgste_perform_essa(struct mm_struct *mm, unsigned long hva, int orc, - unsigned long *oldpte, unsigned long *oldpgste); -void gmap_pmdp_invalidate(struct mm_struct *mm, unsigned long vmaddr); -void gmap_pmdp_idte_local(struct mm_struct *mm, unsigned long vmaddr); -void gmap_pmdp_idte_global(struct mm_struct *mm, unsigned long vmaddr); - #define pgprot_writecombine pgprot_writecombine pgprot_t pgprot_writecombine(pgprot_t prot); @@ -1406,23 +1327,12 @@ static inline void set_ptes(struct mm_struct *mm, unsigned long addr, { if (pte_present(entry)) entry = clear_pte_bit(entry, __pgprot(_PAGE_UNUSED)); - if (mm_has_pgste(mm)) { - for (;;) { - ptep_set_pte_at(mm, addr, ptep, entry); - if (--nr == 0) - break; - ptep++; - entry = __pte(pte_val(entry) + PAGE_SIZE); - addr += PAGE_SIZE; - } - } else { - for (;;) { - set_pte(ptep, entry); - if (--nr == 0) - break; - ptep++; - entry = __pte(pte_val(entry) + PAGE_SIZE); - } + for (;;) { + set_pte(ptep, entry); + if (--nr == 0) + break; + ptep++; + entry = __pte(pte_val(entry) + PAGE_SIZE); } } #define set_ptes set_ptes @@ -2015,9 +1925,6 @@ extern int __vmem_map_4k_page(unsigned long addr, unsigned long phys, pgprot_t p extern int vmem_map_4k_page(unsigned long addr, unsigned long phys, pgprot_t prot); extern void vmem_unmap_4k_page(unsigned long addr); extern pte_t *vmem_get_alloc_pte(unsigned long addr, bool alloc); -extern int s390_enable_sie(void); -extern int s390_enable_skey(void); -extern void s390_reset_cmma(struct mm_struct *mm); /* s390 has a private copy of get unmapped area to deal with cache synonyms */ #define HAVE_ARCH_UNMAPPED_AREA @@ -2026,40 +1933,4 @@ extern void s390_reset_cmma(struct mm_struct *mm); #define pmd_pgtable(pmd) \ ((pgtable_t)__va(pmd_val(pmd) & -sizeof(pte_t)*PTRS_PER_PTE)) -static inline unsigned long gmap_pgste_get_pgt_addr(unsigned long *pgt) -{ - unsigned long *pgstes, res; - - pgstes = pgt + _PAGE_ENTRIES; - - res = (pgstes[0] & PGSTE_ST2_MASK) << 16; - res |= pgstes[1] & PGSTE_ST2_MASK; - res |= (pgstes[2] & PGSTE_ST2_MASK) >> 16; - res |= (pgstes[3] & PGSTE_ST2_MASK) >> 32; - - return res; -} - -static inline pgste_t pgste_get_lock(pte_t *ptep) -{ - unsigned long value = 0; -#ifdef CONFIG_PGSTE - unsigned long *ptr = (unsigned long *)(ptep + PTRS_PER_PTE); - - do { - value = __atomic64_or_barrier(PGSTE_PCL_BIT, ptr); - } while (value & PGSTE_PCL_BIT); - value |= PGSTE_PCL_BIT; -#endif - return __pgste(value); -} - -static inline void pgste_set_unlock(pte_t *ptep, pgste_t pgste) -{ -#ifdef CONFIG_PGSTE - barrier(); - WRITE_ONCE(*(unsigned long *)(ptep + PTRS_PER_PTE), pgste_val(pgste) & ~PGSTE_PCL_BIT); -#endif -} - #endif /* _S390_PAGE_H */ diff --git a/arch/s390/include/asm/tlb.h b/arch/s390/include/asm/tlb.h index 1e50f6f1ad9d..7354b42ee994 100644 --- a/arch/s390/include/asm/tlb.h +++ b/arch/s390/include/asm/tlb.h @@ -36,7 +36,6 @@ static inline bool __tlb_remove_folio_pages(struct mmu_gather *tlb, #include <asm/tlbflush.h> #include <asm-generic/tlb.h> -#include <asm/gmap.h> /* * Release the page cache reference for a pte removed by @@ -85,8 +84,6 @@ static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, tlb->mm->context.flush_mm = 1; tlb->freed_tables = 1; tlb->cleared_pmds = 1; - if (mm_has_pgste(tlb->mm)) - gmap_unlink(tlb->mm, (unsigned long *)pte, address); tlb_remove_ptdesc(tlb, virt_to_ptdesc(pte)); } diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h index c5e02addcd67..dff035372601 100644 --- a/arch/s390/include/asm/uaccess.h +++ b/arch/s390/include/asm/uaccess.h @@ -471,65 +471,15 @@ do { \ #define arch_get_kernel_nofault __mvc_kernel_nofault #define arch_put_kernel_nofault __mvc_kernel_nofault -void __cmpxchg_user_key_called_with_bad_pointer(void); - -int __cmpxchg_user_key1(unsigned long address, unsigned char *uval, - unsigned char old, unsigned char new, unsigned long key); -int __cmpxchg_user_key2(unsigned long address, unsigned short *uval, - unsigned short old, unsigned short new, unsigned long key); -int __cmpxchg_user_key4(unsigned long address, unsigned int *uval, - unsigned int old, unsigned int new, unsigned long key); -int __cmpxchg_user_key8(unsigned long address, unsigned long *uval, - unsigned long old, unsigned long new, unsigned long key); -int __cmpxchg_user_key16(unsigned long address, __uint128_t *uval, - __uint128_t old, __uint128_t new, unsigned long key); - -static __always_inline int _cmpxchg_user_key(unsigned long address, void *uval, - __uint128_t old, __uint128_t new, - unsigned long key, int size) -{ - switch (size) { - case 1: return __cmpxchg_user_key1(address, uval, old, new, key); - case 2: return __cmpxchg_user_key2(address, uval, old, new, key); - case 4: return __cmpxchg_user_key4(address, uval, old, new, key); - case 8: return __cmpxchg_user_key8(address, uval, old, new, key); - case 16: return __cmpxchg_user_key16(address, uval, old, new, key); - default: __cmpxchg_user_key_called_with_bad_pointer(); - } - return 0; -} - -/** - * cmpxchg_user_key() - cmpxchg with user space target, honoring storage keys - * @ptr: User space address of value to compare to @old and exchange with - * @new. Must be aligned to sizeof(*@ptr). - * @uval: Address where the old value of *@ptr is written to. - * @old: Old value. Compared to the content pointed to by @ptr in order to - * determine if the exchange occurs. The old value read from *@ptr is - * written to *@uval. - * @new: New value to place at *@ptr. - * @key: Access key to use for checking storage key protection. - * - * Perform a cmpxchg on a user space target, honoring storage key protection. - * @key alone determines how key checking is performed, neither - * storage-protection-override nor fetch-protection-override apply. - * The caller must compare *@uval and @old to determine if values have been - * exchanged. In case of an exception *@uval is set to zero. - * - * Return: 0: cmpxchg executed - * -EFAULT: an exception happened when trying to access *@ptr - * -EAGAIN: maxed out number of retries (byte and short only) - */ -#define cmpxchg_user_key(ptr, uval, old, new, key) \ -({ \ - __typeof__(ptr) __ptr = (ptr); \ - __typeof__(uval) __uval = (uval); \ - \ - BUILD_BUG_ON(sizeof(*(__ptr)) != sizeof(*(__uval))); \ - might_fault(); \ - __chk_user_ptr(__ptr); \ - _cmpxchg_user_key((unsigned long)(__ptr), (void *)(__uval), \ - (old), (new), (key), sizeof(*(__ptr))); \ -}) +int __cmpxchg_key1(void *address, unsigned char *uval, unsigned char old, + unsigned char new, unsigned long key); +int __cmpxchg_key2(void *address, unsigned short *uval, unsigned short old, + unsigned short new, unsigned long key); +int __cmpxchg_key4(void *address, unsigned int *uval, unsigned int old, + unsigned int new, unsigned long key); +int __cmpxchg_key8(void *address, unsigned long *uval, unsigned long old, + unsigned long new, unsigned long key); +int __cmpxchg_key16(void *address, __uint128_t *uval, __uint128_t old, + __uint128_t new, unsigned long key); #endif /* __S390_UACCESS_H */ diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h index 8018549a1ad2..d919e69662f5 100644 --- a/arch/s390/include/asm/uv.h +++ b/arch/s390/include/asm/uv.h @@ -631,7 +631,8 @@ int uv_pin_shared(unsigned long paddr); int uv_destroy_folio(struct folio *folio); int uv_destroy_pte(pte_t pte); int uv_convert_from_secure_pte(pte_t pte); -int make_hva_secure(struct mm_struct *mm, unsigned long hva, struct uv_cb_header *uvcb); +int s390_wiggle_split_folio(struct mm_struct *mm, struct folio *folio); +int __make_folio_secure(struct folio *folio, struct uv_cb_header *uvcb); int uv_convert_from_secure(unsigned long paddr); int uv_convert_from_secure_folio(struct folio *folio); |