From 85dfe87e24326c472454cc92313ba8c3b4efe53b Mon Sep 17 00:00:00 2001 From: Cornelia Huck Date: Wed, 3 Jul 2013 16:30:54 +0200 Subject: KVM: s390: use cookies for ioeventfd Make use of cookies for the virtio ccw notification hypercall to speed up lookup of devices on the io bus. Signed-off-by: Cornelia Huck [Small fix to a comment. - Paolo] Signed-off-by: Paolo Bonzini --- arch/s390/kvm/diag.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/diag.c index 3074475c8ae0..3a74d8af0d69 100644 --- a/arch/s390/kvm/diag.c +++ b/arch/s390/kvm/diag.c @@ -119,12 +119,21 @@ static int __diag_virtio_hypercall(struct kvm_vcpu *vcpu) * The layout is as follows: * - gpr 2 contains the subchannel id (passed as addr) * - gpr 3 contains the virtqueue index (passed as datamatch) + * - gpr 4 contains the index on the bus (optionally) */ - ret = kvm_io_bus_write(vcpu->kvm, KVM_VIRTIO_CCW_NOTIFY_BUS, - vcpu->run->s.regs.gprs[2], - 8, &vcpu->run->s.regs.gprs[3]); + ret = kvm_io_bus_write_cookie(vcpu->kvm, KVM_VIRTIO_CCW_NOTIFY_BUS, + vcpu->run->s.regs.gprs[2], + 8, &vcpu->run->s.regs.gprs[3], + vcpu->run->s.regs.gprs[4]); srcu_read_unlock(&vcpu->kvm->srcu, idx); - /* kvm_io_bus_write returns -EOPNOTSUPP if it found no match. */ + + /* + * Return cookie in gpr 2, but don't overwrite the register if the + * diagnose will be handled by userspace. + */ + if (ret != -EOPNOTSUPP) + vcpu->run->s.regs.gprs[2] = ret; + /* kvm_io_bus_write_cookie returns -EOPNOTSUPP if it found no match. */ return ret < 0 ? ret : 0; } -- cgit v1.2.3 From e59dbe09f8e6fb8f6ee19dc79d1a2f14299e4cd2 Mon Sep 17 00:00:00 2001 From: Takuya Yoshikawa Date: Thu, 4 Jul 2013 13:40:29 +0900 Subject: KVM: Introduce kvm_arch_memslots_updated() This is called right after the memslots is updated, i.e. when the result of update_memslots() gets installed in install_new_memslots(). Since the memslots needs to be updated twice when we delete or move a memslot, kvm_arch_commit_memory_region() does not correspond to this exactly. In the following patch, x86 will use this new API to check if the mmio generation has reached its maximum value, in which case mmio sptes need to be flushed out. Signed-off-by: Takuya Yoshikawa Acked-by: Alexander Graf Reviewed-by: Xiao Guangrong Signed-off-by: Paolo Bonzini --- arch/s390/kvm/kvm-s390.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/s390') diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index ba694d2ba51e..a3d797b689a3 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -1056,6 +1056,10 @@ int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) return 0; } +void kvm_arch_memslots_updated(struct kvm *kvm) +{ +} + /* Section: memory related */ int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *memslot, -- cgit v1.2.3 From 3eabaee998c787e7e1565574821652548f7fc003 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Fri, 26 Jul 2013 15:04:02 +0200 Subject: KVM: s390: allow sie enablement for multi-threaded programs Improve the code to upgrade the standard 2K page tables to 4K page tables with PGSTEs to allow the operation to happen when the program is already multi-threaded. Signed-off-by: Martin Schwidefsky Signed-off-by: Christian Borntraeger Signed-off-by: Paolo Bonzini --- arch/s390/include/asm/mmu.h | 2 - arch/s390/include/asm/mmu_context.h | 19 +--- arch/s390/include/asm/pgtable.h | 11 +++ arch/s390/mm/pgtable.c | 181 +++++++++++++++++++++++------------- 4 files changed, 129 insertions(+), 84 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/mmu.h b/arch/s390/include/asm/mmu.h index 6340178748bf..ff132ac64ddd 100644 --- a/arch/s390/include/asm/mmu.h +++ b/arch/s390/include/asm/mmu.h @@ -12,8 +12,6 @@ typedef struct { unsigned long asce_bits; unsigned long asce_limit; unsigned long vdso_base; - /* Cloned contexts will be created with extended page tables. */ - unsigned int alloc_pgste:1; /* The mmu context has extended page tables. */ unsigned int has_pgste:1; } mm_context_t; diff --git a/arch/s390/include/asm/mmu_context.h b/arch/s390/include/asm/mmu_context.h index 084e7755ed9b..4fb67a0e4ddf 100644 --- a/arch/s390/include/asm/mmu_context.h +++ b/arch/s390/include/asm/mmu_context.h @@ -21,24 +21,7 @@ static inline int init_new_context(struct task_struct *tsk, #ifdef CONFIG_64BIT mm->context.asce_bits |= _ASCE_TYPE_REGION3; #endif - if (current->mm && current->mm->context.alloc_pgste) { - /* - * alloc_pgste indicates, that any NEW context will be created - * with extended page tables. The old context is unchanged. The - * page table allocation and the page table operations will - * look at has_pgste to distinguish normal and extended page - * tables. The only way to create extended page tables is to - * set alloc_pgste and then create a new context (e.g. dup_mm). - * The page table allocation is called after init_new_context - * and if has_pgste is set, it will create extended page - * tables. - */ - mm->context.has_pgste = 1; - mm->context.alloc_pgste = 1; - } else { - mm->context.has_pgste = 0; - mm->context.alloc_pgste = 0; - } + mm->context.has_pgste = 0; mm->context.asce_limit = STACK_TOP_MAX; crst_table_init((unsigned long *) mm->pgd, pgd_entry_type(mm)); return 0; diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 75fb726de91f..7a60bb93e83c 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1361,6 +1361,17 @@ static inline pmd_t pmd_mkwrite(pmd_t pmd) } #endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLB_PAGE */ +static inline void pmdp_flush_lazy(struct mm_struct *mm, + unsigned long address, pmd_t *pmdp) +{ + int active = (mm == current->active_mm) ? 1 : 0; + + if ((atomic_read(&mm->context.attach_count) & 0xffff) > active) + __pmd_idte(address, pmdp); + else + mm->context.flush_mm = 1; +} + #ifdef CONFIG_TRANSPARENT_HUGEPAGE #define __HAVE_ARCH_PGTABLE_DEPOSIT diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index a8154a1a2c94..6d332487f363 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -731,6 +731,11 @@ void gmap_do_ipte_notify(struct mm_struct *mm, unsigned long addr, pte_t *pte) spin_unlock(&gmap_notifier_lock); } +static inline int page_table_with_pgste(struct page *page) +{ + return atomic_read(&page->_mapcount) == 0; +} + static inline unsigned long *page_table_alloc_pgste(struct mm_struct *mm, unsigned long vmaddr) { @@ -750,7 +755,7 @@ static inline unsigned long *page_table_alloc_pgste(struct mm_struct *mm, mp->vmaddr = vmaddr & PMD_MASK; INIT_LIST_HEAD(&mp->mapper); page->index = (unsigned long) mp; - atomic_set(&page->_mapcount, 3); + atomic_set(&page->_mapcount, 0); table = (unsigned long *) page_to_phys(page); clear_table(table, _PAGE_TYPE_EMPTY, PAGE_SIZE/2); clear_table(table + PTRS_PER_PTE, 0, PAGE_SIZE/2); @@ -821,6 +826,11 @@ EXPORT_SYMBOL(set_guest_storage_key); #else /* CONFIG_PGSTE */ +static inline int page_table_with_pgste(struct page *page) +{ + return 0; +} + static inline unsigned long *page_table_alloc_pgste(struct mm_struct *mm, unsigned long vmaddr) { @@ -897,12 +907,12 @@ void page_table_free(struct mm_struct *mm, unsigned long *table) struct page *page; unsigned int bit, mask; - if (mm_has_pgste(mm)) { + page = pfn_to_page(__pa(table) >> PAGE_SHIFT); + if (page_table_with_pgste(page)) { gmap_disconnect_pgtable(mm, table); return page_table_free_pgste(table); } /* Free 1K/2K page table fragment of a 4K page */ - page = pfn_to_page(__pa(table) >> PAGE_SHIFT); bit = 1 << ((__pa(table) & ~PAGE_MASK)/(PTRS_PER_PTE*sizeof(pte_t))); spin_lock_bh(&mm->context.list_lock); if ((atomic_read(&page->_mapcount) & FRAG_MASK) != FRAG_MASK) @@ -940,14 +950,14 @@ void page_table_free_rcu(struct mmu_gather *tlb, unsigned long *table) unsigned int bit, mask; mm = tlb->mm; - if (mm_has_pgste(mm)) { + page = pfn_to_page(__pa(table) >> PAGE_SHIFT); + if (page_table_with_pgste(page)) { gmap_disconnect_pgtable(mm, table); table = (unsigned long *) (__pa(table) | FRAG_MASK); tlb_remove_table(tlb, table); return; } bit = 1 << ((__pa(table) & ~PAGE_MASK) / (PTRS_PER_PTE*sizeof(pte_t))); - page = pfn_to_page(__pa(table) >> PAGE_SHIFT); spin_lock_bh(&mm->context.list_lock); if ((atomic_read(&page->_mapcount) & FRAG_MASK) != FRAG_MASK) list_del(&page->lru); @@ -1033,36 +1043,120 @@ void tlb_remove_table(struct mmu_gather *tlb, void *table) } #ifdef CONFIG_TRANSPARENT_HUGEPAGE -void thp_split_vma(struct vm_area_struct *vma) +static inline void thp_split_vma(struct vm_area_struct *vma) { unsigned long addr; - struct page *page; - for (addr = vma->vm_start; addr < vma->vm_end; addr += PAGE_SIZE) { - page = follow_page(vma, addr, FOLL_SPLIT); - } + for (addr = vma->vm_start; addr < vma->vm_end; addr += PAGE_SIZE) + follow_page(vma, addr, FOLL_SPLIT); } -void thp_split_mm(struct mm_struct *mm) +static inline void thp_split_mm(struct mm_struct *mm) { - struct vm_area_struct *vma = mm->mmap; + struct vm_area_struct *vma; - while (vma != NULL) { + for (vma = mm->mmap; vma != NULL; vma = vma->vm_next) { thp_split_vma(vma); vma->vm_flags &= ~VM_HUGEPAGE; vma->vm_flags |= VM_NOHUGEPAGE; - vma = vma->vm_next; } + mm->def_flags |= VM_NOHUGEPAGE; +} +#else +static inline void thp_split_mm(struct mm_struct *mm) +{ } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ +static unsigned long page_table_realloc_pmd(struct mmu_gather *tlb, + struct mm_struct *mm, pud_t *pud, + unsigned long addr, unsigned long end) +{ + unsigned long next, *table, *new; + struct page *page; + pmd_t *pmd; + + pmd = pmd_offset(pud, addr); + do { + next = pmd_addr_end(addr, end); +again: + if (pmd_none_or_clear_bad(pmd)) + continue; + table = (unsigned long *) pmd_deref(*pmd); + page = pfn_to_page(__pa(table) >> PAGE_SHIFT); + if (page_table_with_pgste(page)) + continue; + /* Allocate new page table with pgstes */ + new = page_table_alloc_pgste(mm, addr); + if (!new) { + mm->context.has_pgste = 0; + continue; + } + spin_lock(&mm->page_table_lock); + if (likely((unsigned long *) pmd_deref(*pmd) == table)) { + /* Nuke pmd entry pointing to the "short" page table */ + pmdp_flush_lazy(mm, addr, pmd); + pmd_clear(pmd); + /* Copy ptes from old table to new table */ + memcpy(new, table, PAGE_SIZE/2); + clear_table(table, _PAGE_INVALID, PAGE_SIZE/2); + /* Establish new table */ + pmd_populate(mm, pmd, (pte_t *) new); + /* Free old table with rcu, there might be a walker! */ + page_table_free_rcu(tlb, table); + new = NULL; + } + spin_unlock(&mm->page_table_lock); + if (new) { + page_table_free_pgste(new); + goto again; + } + } while (pmd++, addr = next, addr != end); + + return addr; +} + +static unsigned long page_table_realloc_pud(struct mmu_gather *tlb, + struct mm_struct *mm, pgd_t *pgd, + unsigned long addr, unsigned long end) +{ + unsigned long next; + pud_t *pud; + + pud = pud_offset(pgd, addr); + do { + next = pud_addr_end(addr, end); + if (pud_none_or_clear_bad(pud)) + continue; + next = page_table_realloc_pmd(tlb, mm, pud, addr, next); + } while (pud++, addr = next, addr != end); + + return addr; +} + +static void page_table_realloc(struct mmu_gather *tlb, struct mm_struct *mm, + unsigned long addr, unsigned long end) +{ + unsigned long next; + pgd_t *pgd; + + pgd = pgd_offset(mm, addr); + do { + next = pgd_addr_end(addr, end); + if (pgd_none_or_clear_bad(pgd)) + continue; + next = page_table_realloc_pud(tlb, mm, pgd, addr, next); + } while (pgd++, addr = next, addr != end); +} + /* * switch on pgstes for its userspace process (for kvm) */ int s390_enable_sie(void) { struct task_struct *tsk = current; - struct mm_struct *mm, *old_mm; + struct mm_struct *mm = tsk->mm; + struct mmu_gather tlb; /* Do we have switched amode? If no, we cannot do sie */ if (s390_user_mode == HOME_SPACE_MODE) @@ -1072,57 +1166,16 @@ int s390_enable_sie(void) if (mm_has_pgste(tsk->mm)) return 0; - /* lets check if we are allowed to replace the mm */ - task_lock(tsk); - if (!tsk->mm || atomic_read(&tsk->mm->mm_users) > 1 || -#ifdef CONFIG_AIO - !hlist_empty(&tsk->mm->ioctx_list) || -#endif - tsk->mm != tsk->active_mm) { - task_unlock(tsk); - return -EINVAL; - } - task_unlock(tsk); - - /* we copy the mm and let dup_mm create the page tables with_pgstes */ - tsk->mm->context.alloc_pgste = 1; - /* make sure that both mms have a correct rss state */ - sync_mm_rss(tsk->mm); - mm = dup_mm(tsk); - tsk->mm->context.alloc_pgste = 0; - if (!mm) - return -ENOMEM; - -#ifdef CONFIG_TRANSPARENT_HUGEPAGE + down_write(&mm->mmap_sem); /* split thp mappings and disable thp for future mappings */ thp_split_mm(mm); - mm->def_flags |= VM_NOHUGEPAGE; -#endif - - /* Now lets check again if something happened */ - task_lock(tsk); - if (!tsk->mm || atomic_read(&tsk->mm->mm_users) > 1 || -#ifdef CONFIG_AIO - !hlist_empty(&tsk->mm->ioctx_list) || -#endif - tsk->mm != tsk->active_mm) { - mmput(mm); - task_unlock(tsk); - return -EINVAL; - } - - /* ok, we are alone. No ptrace, no threads, etc. */ - old_mm = tsk->mm; - tsk->mm = tsk->active_mm = mm; - preempt_disable(); - update_mm(mm, tsk); - atomic_inc(&mm->context.attach_count); - atomic_dec(&old_mm->context.attach_count); - cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm)); - preempt_enable(); - task_unlock(tsk); - mmput(old_mm); - return 0; + /* Reallocate the page tables with pgstes */ + mm->context.has_pgste = 1; + tlb_gather_mmu(&tlb, mm, 0); + page_table_realloc(&tlb, mm, 0, TASK_SIZE); + tlb_finish_mmu(&tlb, 0, -1); + up_write(&mm->mmap_sem); + return mm->context.has_pgste ? 0 : -ENOMEM; } EXPORT_SYMBOL_GPL(s390_enable_sie); -- cgit v1.2.3 From ee6ee55bb505c5bd8e64bc652281a93fb99c07b3 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Fri, 26 Jul 2013 15:04:03 +0200 Subject: KVM: s390: fix task size check The gmap_map_segment function uses PGDIR_SIZE in the check for the maximum address in the tasks address space. This incorrectly limits the amount of memory usable for a kvm guest to 4TB. The correct limit is (1UL << 53). As the TASK_SIZE has different values (4TB vs 8PB) dependent on the existance of the fourth page table level, create a new define 'TASK_MAX_SIZE' for (1UL << 53). Signed-off-by: Martin Schwidefsky Signed-off-by: Christian Borntraeger Signed-off-by: Paolo Bonzini --- arch/s390/include/asm/processor.h | 2 ++ arch/s390/mm/pgtable.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 6b499870662f..83c85c217f5c 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -43,6 +43,7 @@ extern void execve_tail(void); #ifndef CONFIG_64BIT #define TASK_SIZE (1UL << 31) +#define TASK_MAX_SIZE (1UL << 31) #define TASK_UNMAPPED_BASE (1UL << 30) #else /* CONFIG_64BIT */ @@ -51,6 +52,7 @@ extern void execve_tail(void); #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \ (1UL << 30) : (1UL << 41)) #define TASK_SIZE TASK_SIZE_OF(current) +#define TASK_MAX_SIZE (1UL << 53) #endif /* CONFIG_64BIT */ diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index 6d332487f363..967d0bf1c059 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -335,7 +335,7 @@ int gmap_map_segment(struct gmap *gmap, unsigned long from, if ((from | to | len) & (PMD_SIZE - 1)) return -EINVAL; - if (len == 0 || from + len > PGDIR_SIZE || + if (len == 0 || from + len > TASK_MAX_SIZE || from + len < from || to + len < to) return -EINVAL; -- cgit v1.2.3 From 78c4b59f721fb0c30e8520f1c8e78fbf47bddfdf Mon Sep 17 00:00:00 2001 From: Michael Mueller Date: Fri, 26 Jul 2013 15:04:04 +0200 Subject: KVM: s390: declare virtual HW facilities The patch renames the array holding the HW facility bitmaps. This allows to interprete the variable as set of virtual machine specific "virtual" facilities. The basic idea is to make virtual facilities externally managable in future. An availability test for virtual facilites has been added as well. Signed-off-by: Michael Mueller Signed-off-by: Christian Borntraeger Signed-off-by: Paolo Bonzini --- arch/s390/kvm/kvm-s390.c | 23 +++++++++++++++-------- arch/s390/kvm/kvm-s390.h | 3 +++ arch/s390/kvm/priv.c | 11 ++++------- 3 files changed, 22 insertions(+), 15 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index a3d797b689a3..ac8e6670c551 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -28,6 +28,7 @@ #include #include #include +#include #include #include "kvm-s390.h" #include "gaccess.h" @@ -84,9 +85,15 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { { NULL } }; -static unsigned long long *facilities; +unsigned long *vfacilities; static struct gmap_notifier gmap_notifier; +/* test availability of vfacility */ +static inline int test_vfacility(unsigned long nr) +{ + return __test_facility(nr, (void *) vfacilities); +} + /* Section: not file related */ int kvm_arch_hardware_enable(void *garbage) { @@ -387,7 +394,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) vcpu->arch.sie_block->ecb = 6; vcpu->arch.sie_block->ecb2 = 8; vcpu->arch.sie_block->eca = 0xC1002001U; - vcpu->arch.sie_block->fac = (int) (long) facilities; + vcpu->arch.sie_block->fac = (int) (long) vfacilities; hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, (unsigned long) vcpu); @@ -1126,20 +1133,20 @@ static int __init kvm_s390_init(void) * to hold the maximum amount of facilities. On the other hand, we * only set facilities that are known to work in KVM. */ - facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); - if (!facilities) { + vfacilities = (unsigned long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); + if (!vfacilities) { kvm_exit(); return -ENOMEM; } - memcpy(facilities, S390_lowcore.stfle_fac_list, 16); - facilities[0] &= 0xff82fff3f47c0000ULL; - facilities[1] &= 0x001c000000000000ULL; + memcpy(vfacilities, S390_lowcore.stfle_fac_list, 16); + vfacilities[0] &= 0xff82fff3f47c0000UL; + vfacilities[1] &= 0x001c000000000000UL; return 0; } static void __exit kvm_s390_exit(void) { - free_page((unsigned long) facilities); + free_page((unsigned long) vfacilities); kvm_exit(); } diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index 028ca9fd2158..faa4df633474 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -24,6 +24,9 @@ typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu); +/* declare vfacilities extern */ +extern unsigned long *vfacilities; + /* negativ values are error codes, positive values for internal conditions */ #define SIE_INTERCEPT_RERUNVCPU (1<<0) #define SIE_INTERCEPT_UCONTROL (1<<1) diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 0da3e6eb6be6..a14c4b68aed7 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -227,7 +227,6 @@ static int handle_io_inst(struct kvm_vcpu *vcpu) static int handle_stfl(struct kvm_vcpu *vcpu) { - unsigned int facility_list; int rc; vcpu->stat.instruction_stfl++; @@ -235,15 +234,13 @@ static int handle_stfl(struct kvm_vcpu *vcpu) if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); - /* only pass the facility bits, which we can handle */ - facility_list = S390_lowcore.stfl_fac_list & 0xff82fff3; - rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list), - &facility_list, sizeof(facility_list)); + vfacilities, 4); if (rc) return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); - VCPU_EVENT(vcpu, 5, "store facility list value %x", facility_list); - trace_kvm_s390_handle_stfl(vcpu, facility_list); + VCPU_EVENT(vcpu, 5, "store facility list value %x", + *(unsigned int *) vfacilities); + trace_kvm_s390_handle_stfl(vcpu, *(unsigned int *) vfacilities); return 0; } -- cgit v1.2.3 From 843200e7cc5de5f482ebe8acbf81e35a1c8e4a3d Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Fri, 26 Jul 2013 15:04:05 +0200 Subject: KVM: s390: Fix sparse warnings in priv.c sparse complained about the missing UL postfix for long constants. Signed-off-by: Thomas Huth Acked-by: Cornelia Huck Signed-off-by: Christian Borntraeger Signed-off-by: Paolo Bonzini --- arch/s390/kvm/priv.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index a14c4b68aed7..697e34b59036 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -490,12 +490,12 @@ static int handle_epsw(struct kvm_vcpu *vcpu) kvm_s390_get_regs_rre(vcpu, ®1, ®2); /* This basically extracts the mask half of the psw. */ - vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000; + vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL; vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32; if (reg2) { - vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000; + vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL; vcpu->run->s.regs.gprs[reg2] |= - vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffff; + vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL; } return 0; } -- cgit v1.2.3 From ea828ebf59f5b56e7261bfaeb94393c9dcb86260 Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Fri, 26 Jul 2013 15:04:06 +0200 Subject: KVM: s390: Add helper function for setting condition code Introduced a helper function for setting the CC in the guest PSW to improve the readability of the code. Signed-off-by: Thomas Huth Signed-off-by: Christian Borntraeger Signed-off-by: Paolo Bonzini --- arch/s390/kvm/kvm-s390.h | 7 +++++++ arch/s390/kvm/priv.c | 15 ++++++--------- 2 files changed, 13 insertions(+), 9 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index faa4df633474..dc99f1ca4267 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -115,6 +115,13 @@ static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu) return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; } +/* Set the condition code in the guest program status word */ +static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc) +{ + vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44); + vcpu->arch.sie_block->gpsw.mask |= cc << 44; +} + int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); void kvm_s390_tasklet(unsigned long parm); diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 697e34b59036..8f8d8ee9b1fb 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -163,8 +163,7 @@ static int handle_tpi(struct kvm_vcpu *vcpu) kfree(inti); no_interrupt: /* Set condition code and we're done. */ - vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); - vcpu->arch.sie_block->gpsw.mask |= (cc & 3ul) << 44; + kvm_s390_set_psw_cc(vcpu, cc); return 0; } @@ -219,8 +218,7 @@ static int handle_io_inst(struct kvm_vcpu *vcpu) * Set condition code 3 to stop the guest from issueing channel * I/O instructions. */ - vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); - vcpu->arch.sie_block->gpsw.mask |= (3 & 3ul) << 44; + kvm_s390_set_psw_cc(vcpu, 3); return 0; } } @@ -383,7 +381,7 @@ static int handle_stsi(struct kvm_vcpu *vcpu) return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); if (fc > 3) { - vcpu->arch.sie_block->gpsw.mask |= 3ul << 44; /* cc 3 */ + kvm_s390_set_psw_cc(vcpu, 3); return 0; } @@ -393,7 +391,7 @@ static int handle_stsi(struct kvm_vcpu *vcpu) if (fc == 0) { vcpu->run->s.regs.gprs[0] = 3 << 28; - vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); /* cc 0 */ + kvm_s390_set_psw_cc(vcpu, 0); return 0; } @@ -427,12 +425,11 @@ static int handle_stsi(struct kvm_vcpu *vcpu) } trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2); free_page(mem); - vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); + kvm_s390_set_psw_cc(vcpu, 0); vcpu->run->s.regs.gprs[0] = 0; return 0; out_no_data: - /* condition code 3 */ - vcpu->arch.sie_block->gpsw.mask |= 3ul << 44; + kvm_s390_set_psw_cc(vcpu, 3); out_exception: free_page(mem); return rc; -- cgit v1.2.3 From bf640876e21fe603f7f52b0c27d66b7716da0384 Mon Sep 17 00:00:00 2001 From: Dominik Dingel Date: Fri, 26 Jul 2013 15:04:07 +0200 Subject: KVM: s390: Make KVM_HVA_ERR_BAD usable on s390 Current common code uses PAGE_OFFSET to indicate a bad host virtual address. As this check won't work on architectures that don't map kernel and user memory into the same address space (e.g. s390), such architectures can now provide their own KVM_HVA_ERR_BAD defines. Signed-off-by: Dominik Dingel Signed-off-by: Christian Borntraeger Signed-off-by: Paolo Bonzini --- arch/s390/include/asm/kvm_host.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 3238d4004e84..e87ecaa2c569 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -274,6 +274,14 @@ struct kvm_arch{ int css_support; }; +#define KVM_HVA_ERR_BAD (-1UL) +#define KVM_HVA_ERR_RO_BAD (-2UL) + +static inline bool kvm_is_error_hva(unsigned long addr) +{ + return IS_ERR_VALUE(addr); +} + extern int sie64a(struct kvm_s390_sie_block *, u64 *); extern char sie_exit; #endif -- cgit v1.2.3