diff options
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/tlb.h | 9 | ||||
| -rw-r--r-- | arch/s390/kernel/early.c | 7 | ||||
| -rw-r--r-- | arch/s390/kernel/smp.c | 7 | ||||
| -rw-r--r-- | arch/s390/kernel/vdso64/clock_gettime.S | 11 | ||||
| -rw-r--r-- | arch/s390/kvm/interrupt.c | 2 | ||||
| -rw-r--r-- | arch/s390/kvm/sigp.c | 7 | ||||
| -rw-r--r-- | arch/s390/power/swsusp.c | 36 | ||||
| -rw-r--r-- | arch/s390/power/swsusp_asm64.S | 35 |
8 files changed, 62 insertions, 52 deletions
diff --git a/arch/s390/include/asm/tlb.h b/arch/s390/include/asm/tlb.h index 3d8a96d..81150b0 100644 --- a/arch/s390/include/asm/tlb.h +++ b/arch/s390/include/asm/tlb.h @@ -96,7 +96,8 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page) * pte_free_tlb frees a pte table and clears the CRSTE for the * page table from the tlb. */ -static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte) +static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, + unsigned long address) { if (!tlb->fullmm) { tlb->array[tlb->nr_ptes++] = pte; @@ -113,7 +114,8 @@ static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte) * as the pgd. pmd_free_tlb checks the asce_limit against 2GB * to avoid the double free of the pmd in this case. */ -static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd) +static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd, + unsigned long address) { #ifdef __s390x__ if (tlb->mm->context.asce_limit <= (1UL << 31)) @@ -134,7 +136,8 @@ static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd) * as the pgd. pud_free_tlb checks the asce_limit against 4TB * to avoid the double free of the pud in this case. */ -static inline void pud_free_tlb(struct mmu_gather *tlb, pud_t *pud) +static inline void pud_free_tlb(struct mmu_gather *tlb, pud_t *pud, + unsigned long address) { #ifdef __s390x__ if (tlb->mm->context.asce_limit <= (1UL << 42)) diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index f9b1440..cae14c4 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -208,9 +208,12 @@ static noinline __init void detect_machine_type(void) machine_flags |= MACHINE_FLAG_KVM; else machine_flags |= MACHINE_FLAG_VM; + + /* Store machine flags for setting up lowcore early */ + S390_lowcore.machine_flags = machine_flags; } -static void early_pgm_check_handler(void) +static __init void early_pgm_check_handler(void) { unsigned long addr; const struct exception_table_entry *fixup; @@ -222,7 +225,7 @@ static void early_pgm_check_handler(void) S390_lowcore.program_old_psw.addr = fixup->fixup | PSW_ADDR_AMODE; } -void setup_lowcore_early(void) +static noinline __init void setup_lowcore_early(void) { psw_t psw; diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 2270730..be2cae0 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -687,13 +687,14 @@ void __init smp_prepare_cpus(unsigned int max_cpus) #ifndef CONFIG_64BIT if (MACHINE_HAS_IEEE) lowcore->extended_save_area_addr = (u32) save_area; -#else - if (vdso_alloc_per_cpu(smp_processor_id(), lowcore)) - BUG(); #endif set_prefix((u32)(unsigned long) lowcore); local_mcck_enable(); local_irq_enable(); +#ifdef CONFIG_64BIT + if (vdso_alloc_per_cpu(smp_processor_id(), &S390_lowcore)) + BUG(); +#endif for_each_possible_cpu(cpu) if (cpu != smp_processor_id()) smp_create_idle(cpu); diff --git a/arch/s390/kernel/vdso64/clock_gettime.S b/arch/s390/kernel/vdso64/clock_gettime.S index 79dbfee..49106c6 100644 --- a/arch/s390/kernel/vdso64/clock_gettime.S +++ b/arch/s390/kernel/vdso64/clock_gettime.S @@ -88,10 +88,17 @@ __kernel_clock_gettime: llilh %r4,0x0100 sar %a4,%r4 lghi %r4,0 + epsw %r5,0 sacf 512 /* Magic ectg instruction */ .insn ssf,0xc80100000000,__VDSO_ECTG_BASE(4),__VDSO_ECTG_USER(4),4 - sacf 0 - sar %a4,%r2 + tml %r5,0x4000 + jo 11f + tml %r5,0x8000 + jno 10f + sacf 256 + j 11f +10: sacf 0 +11: sar %a4,%r2 algr %r1,%r0 /* r1 = cputime as TOD value */ mghi %r1,1000 /* convert to nanoseconds */ srlg %r1,%r1,12 /* r1 = cputime in nanosec */ diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index f04f530..4d61341 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -386,7 +386,7 @@ no_timer: } __unset_cpu_idle(vcpu); __set_current_state(TASK_RUNNING); - remove_wait_queue(&vcpu->wq, &wait); + remove_wait_queue(&vcpu->arch.local_int.wq, &wait); spin_unlock_bh(&vcpu->arch.local_int.lock); spin_unlock(&vcpu->arch.local_int.float_int->lock); hrtimer_try_to_cancel(&vcpu->arch.ckc_timer); diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c index 3667883..0ef81d6 100644 --- a/arch/s390/kvm/sigp.c +++ b/arch/s390/kvm/sigp.c @@ -169,7 +169,7 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address, unsigned long *reg) { struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; - struct kvm_s390_local_interrupt *li; + struct kvm_s390_local_interrupt *li = NULL; struct kvm_s390_interrupt_info *inti; int rc; u8 tmp; @@ -189,9 +189,10 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address, return 2; /* busy */ spin_lock(&fi->lock); - li = fi->local_int[cpu_addr]; + if (cpu_addr < KVM_MAX_VCPUS) + li = fi->local_int[cpu_addr]; - if ((cpu_addr >= KVM_MAX_VCPUS) || (li == NULL)) { + if (li == NULL) { rc = 1; /* incorrect state */ *reg &= SIGP_STAT_INCORRECT_STATE; kfree(inti); diff --git a/arch/s390/power/swsusp.c b/arch/s390/power/swsusp.c index e6a4fe9..bd1f5c6 100644 --- a/arch/s390/power/swsusp.c +++ b/arch/s390/power/swsusp.c @@ -7,24 +7,36 @@ * */ +#include <asm/system.h> -/* - * save CPU registers before creating a hibernation image and before - * restoring the memory state from it - */ void save_processor_state(void) { - /* implentation contained in the - * swsusp_arch_suspend function + /* swsusp_arch_suspend() actually saves all cpu register contents. + * Machine checks must be disabled since swsusp_arch_suspend() stores + * register contents to their lowcore save areas. That's the same + * place where register contents on machine checks would be saved. + * To avoid register corruption disable machine checks. + * We must also disable machine checks in the new psw mask for + * program checks, since swsusp_arch_suspend() may generate program + * checks. Disabling machine checks for all other new psw masks is + * just paranoia. */ + local_mcck_disable(); + /* Disable lowcore protection */ + __ctl_clear_bit(0,28); + S390_lowcore.external_new_psw.mask &= ~PSW_MASK_MCHECK; + S390_lowcore.svc_new_psw.mask &= ~PSW_MASK_MCHECK; + S390_lowcore.io_new_psw.mask &= ~PSW_MASK_MCHECK; + S390_lowcore.program_new_psw.mask &= ~PSW_MASK_MCHECK; } -/* - * restore the contents of CPU registers - */ void restore_processor_state(void) { - /* implentation contained in the - * swsusp_arch_resume function - */ + S390_lowcore.external_new_psw.mask |= PSW_MASK_MCHECK; + S390_lowcore.svc_new_psw.mask |= PSW_MASK_MCHECK; + S390_lowcore.io_new_psw.mask |= PSW_MASK_MCHECK; + S390_lowcore.program_new_psw.mask |= PSW_MASK_MCHECK; + /* Enable lowcore protection */ + __ctl_set_bit(0,28); + local_mcck_enable(); } diff --git a/arch/s390/power/swsusp_asm64.S b/arch/s390/power/swsusp_asm64.S index 76d688d..b26df5c 100644 --- a/arch/s390/power/swsusp_asm64.S +++ b/arch/s390/power/swsusp_asm64.S @@ -32,19 +32,14 @@ swsusp_arch_suspend: /* Deactivate DAT */ stnsm __SF_EMPTY(%r15),0xfb - /* Switch off lowcore protection */ - stctg %c0,%c0,__SF_EMPTY(%r15) - ni __SF_EMPTY+4(%r15),0xef - lctlg %c0,%c0,__SF_EMPTY(%r15) - /* Store prefix register on stack */ stpx __SF_EMPTY(%r15) - /* Setup base register for lowcore (absolute 0) */ - llgf %r1,__SF_EMPTY(%r15) + /* Save prefix register contents for lowcore */ + llgf %r4,__SF_EMPTY(%r15) /* Get pointer to save area */ - aghi %r1,0x1000 + lghi %r1,0x1000 /* Store registers */ mvc 0x318(4,%r1),__SF_EMPTY(%r15) /* move prefix to lowcore */ @@ -79,17 +74,15 @@ swsusp_arch_suspend: xc __SF_EMPTY(4,%r15),__SF_EMPTY(%r15) spx __SF_EMPTY(%r15) - /* Setup lowcore */ - brasl %r14,setup_lowcore_early + lghi %r2,0 + lghi %r3,2*PAGE_SIZE + lghi %r5,2*PAGE_SIZE +1: mvcle %r2,%r4,0 + jo 1b /* Save image */ brasl %r14,swsusp_save - /* Switch on lowcore protection */ - stctg %c0,%c0,__SF_EMPTY(%r15) - oi __SF_EMPTY+4(%r15),0x10 - lctlg %c0,%c0,__SF_EMPTY(%r15) - /* Restore prefix register and return */ lghi %r1,0x1000 spx 0x318(%r1) @@ -117,11 +110,6 @@ swsusp_arch_resume: /* Deactivate DAT */ stnsm __SF_EMPTY(%r15),0xfb - /* Switch off lowcore protection */ - stctg %c0,%c0,__SF_EMPTY(%r15) - ni __SF_EMPTY+4(%r15),0xef - lctlg %c0,%c0,__SF_EMPTY(%r15) - /* Set prefix page to zero */ xc __SF_EMPTY(4,%r15),__SF_EMPTY(%r15) spx __SF_EMPTY(%r15) @@ -175,7 +163,7 @@ swsusp_arch_resume: /* Load old stack */ lg %r15,0x2f8(%r13) - /* Pointer to save arae */ + /* Pointer to save area */ lghi %r13,0x1000 #ifdef CONFIG_SMP @@ -187,11 +175,6 @@ swsusp_arch_resume: /* Restore prefix register */ spx 0x318(%r13) - /* Switch on lowcore protection */ - stctg %c0,%c0,__SF_EMPTY(%r15) - oi __SF_EMPTY+4(%r15),0x10 - lctlg %c0,%c0,__SF_EMPTY(%r15) - /* Activate DAT */ stosm __SF_EMPTY(%r15),0x04 |
