diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 57057fb1cc07..c92713893313 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -952,15 +952,27 @@ static inline pte_t pte_mkhuge(pte_t pte) #define IPTE_GLOBAL 0 #define IPTE_LOCAL 1 -static inline void __ptep_ipte(unsigned long address, pte_t *ptep, int local) +#define IPTE_NODAT 0x400 + +static inline void __ptep_ipte(unsigned long address, pte_t *ptep, + unsigned long opt, int local) { unsigned long pto = (unsigned long) ptep; - /* Invalidation + TLB flush for the pte */ + if (__builtin_constant_p(opt) && opt == 0) { + /* Invalidation + TLB flush for the pte */ + asm volatile( + " .insn rrf,0xb2210000,%[r1],%[r2],0,%[m4]" + : "+m" (*ptep) : [r1] "a" (pto), [r2] "a" (address), + [m4] "i" (local)); + return; + } + + /* Invalidate ptes with options + TLB flush of the ptes */ asm volatile( - " .insn rrf,0xb2210000,%[r1],%[r2],0,%[m4]" - : "+m" (*ptep) : [r1] "a" (pto), [r2] "a" (address), - [m4] "i" (local)); + " .insn rrf,0xb2210000,%[r1],%[r2],%[r3],%[m4]" + : [r2] "+a" (address), [r3] "+a" (opt) + : [r1] "a" (pto), [m4] "i" (local) : "memory"); } static inline void __ptep_ipte_range(unsigned long address, int nr, @@ -1341,31 +1353,36 @@ static inline void __pmdp_csp(pmd_t *pmdp) #define IDTE_GLOBAL 0 #define IDTE_LOCAL 1 -static inline void __pmdp_idte(unsigned long address, pmd_t *pmdp, int local) +#define IDTE_PTOA 0x0800 +#define IDTE_NODAT 0x1000 + +static inline void __pmdp_idte(unsigned long addr, pmd_t *pmdp, + unsigned long opt, int local) { unsigned long sto; - sto = (unsigned long) pmdp - pmd_index(address) * sizeof(pmd_t); + sto = (unsigned long) pmdp - pmd_index(addr) * sizeof(pmd_t); asm volatile( " .insn rrf,0xb98e0000,%[r1],%[r2],0,%[m4]" : "+m" (*pmdp) - : [r1] "a" (sto), [r2] "a" ((address & HPAGE_MASK)), + : [r1] "a" (sto), [r2] "a" ((addr & HPAGE_MASK) | opt), [m4] "i" (local) : "cc" ); } -static inline void __pudp_idte(unsigned long address, pud_t *pudp, int local) +static inline void __pudp_idte(unsigned long addr, pud_t *pudp, + unsigned long opt, int local) { unsigned long r3o; - r3o = (unsigned long) pudp - pud_index(address) * sizeof(pud_t); + r3o = (unsigned long) pudp - pud_index(addr) * sizeof(pud_t); r3o |= _ASCE_TYPE_REGION3; asm volatile( " .insn rrf,0xb98e0000,%[r1],%[r2],0,%[m4]" : "+m" (*pudp) - : [r1] "a" (r3o), [r2] "a" ((address & PUD_MASK)), + : [r1] "a" (r3o), [r2] "a" ((addr & PUD_MASK) | opt), [m4] "i" (local) - : "cc"); + : "cc" ); } pmd_t pmdp_xchg_direct(struct mm_struct *, unsigned long, pmd_t *, pmd_t); diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h index 11e59ba4b521..49c425903894 100644 --- a/arch/s390/include/asm/setup.h +++ b/arch/s390/include/asm/setup.h @@ -29,8 +29,9 @@ #define MACHINE_FLAG_TE _BITUL(11) #define MACHINE_FLAG_TLB_LC _BITUL(12) #define MACHINE_FLAG_VX _BITUL(13) -#define MACHINE_FLAG_NX _BITUL(14) -#define MACHINE_FLAG_GS _BITUL(15) +#define MACHINE_FLAG_TLB_GUEST _BITUL(14) +#define MACHINE_FLAG_NX _BITUL(15) +#define MACHINE_FLAG_GS _BITUL(16) #define LPP_MAGIC _BITUL(31) #define LPP_PFAULT_PID_MASK _AC(0xffffffff, UL) @@ -68,6 +69,7 @@ extern void detect_memory_memblock(void); #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/tlbflush.h b/arch/s390/include/asm/tlbflush.h index 39846100682a..38d82ed60345 100644 --- a/arch/s390/include/asm/tlbflush.h +++ b/arch/s390/include/asm/tlbflush.h @@ -20,10 +20,13 @@ static inline void __tlb_flush_local(void) */ static inline void __tlb_flush_idte(unsigned long asce) { + unsigned long opt; + + opt = IDTE_PTOA; /* Global TLB flush for the mm */ asm volatile( " .insn rrf,0xb98e0000,0,%0,%1,0" - : : "a" (2048), "a" (asce) : "cc"); + : : "a" (opt), "a" (asce) : "cc"); } #ifdef CONFIG_SMP diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c index 180481589246..5734b01ca765 100644 --- a/arch/s390/mm/pageattr.c +++ b/arch/s390/mm/pageattr.c @@ -328,7 +328,7 @@ static void ipte_range(pte_t *pte, unsigned long address, int nr) return; } for (i = 0; i < nr; i++) { - __ptep_ipte(address, pte, IPTE_GLOBAL); + __ptep_ipte(address, pte, 0, IPTE_GLOBAL); address += PAGE_SIZE; pte++; } diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index d4d409ba206b..9696bf89f03a 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -25,6 +25,38 @@ #include #include +static inline void ptep_ipte_local(struct mm_struct *mm, unsigned long addr, + pte_t *ptep) +{ + unsigned long opt, asce; + + if (MACHINE_HAS_TLB_GUEST) { + opt = 0; + asce = READ_ONCE(mm->context.gmap_asce); + if (asce == 0UL) + opt |= IPTE_NODAT; + __ptep_ipte(addr, ptep, opt, IPTE_LOCAL); + } else { + __ptep_ipte(addr, ptep, 0, IPTE_LOCAL); + } +} + +static inline void ptep_ipte_global(struct mm_struct *mm, unsigned long addr, + pte_t *ptep) +{ + unsigned long opt, asce; + + if (MACHINE_HAS_TLB_GUEST) { + opt = 0; + asce = READ_ONCE(mm->context.gmap_asce); + if (asce == 0UL) + opt |= IPTE_NODAT; + __ptep_ipte(addr, ptep, opt, IPTE_GLOBAL); + } else { + __ptep_ipte(addr, ptep, 0, IPTE_GLOBAL); + } +} + static inline pte_t ptep_flush_direct(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { @@ -36,9 +68,9 @@ static inline pte_t ptep_flush_direct(struct mm_struct *mm, atomic_inc(&mm->context.flush_count); if (MACHINE_HAS_TLB_LC && cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id()))) - __ptep_ipte(addr, ptep, IPTE_LOCAL); + ptep_ipte_local(mm, addr, ptep); else - __ptep_ipte(addr, ptep, IPTE_GLOBAL); + ptep_ipte_global(mm, addr, ptep); atomic_dec(&mm->context.flush_count); return old; } @@ -57,7 +89,7 @@ static inline pte_t ptep_flush_lazy(struct mm_struct *mm, pte_val(*ptep) |= _PAGE_INVALID; mm->context.flush_mm = 1; } else - __ptep_ipte(addr, ptep, IPTE_GLOBAL); + ptep_ipte_global(mm, addr, ptep); atomic_dec(&mm->context.flush_count); return old; } @@ -290,6 +322,26 @@ void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr, } EXPORT_SYMBOL(ptep_modify_prot_commit); +static inline void pmdp_idte_local(struct mm_struct *mm, + unsigned long addr, pmd_t *pmdp) +{ + if (MACHINE_HAS_TLB_GUEST) + __pmdp_idte(addr, pmdp, IDTE_NODAT, IDTE_LOCAL); + else + __pmdp_idte(addr, pmdp, 0, IDTE_LOCAL); +} + +static inline void pmdp_idte_global(struct mm_struct *mm, + unsigned long addr, pmd_t *pmdp) +{ + if (MACHINE_HAS_TLB_GUEST) + __pmdp_idte(addr, pmdp, IDTE_NODAT, IDTE_GLOBAL); + else if (MACHINE_HAS_IDTE) + __pmdp_idte(addr, pmdp, 0, IDTE_GLOBAL); + else + __pmdp_csp(pmdp); +} + static inline pmd_t pmdp_flush_direct(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp) { @@ -298,16 +350,12 @@ static inline pmd_t pmdp_flush_direct(struct mm_struct *mm, old = *pmdp; if (pmd_val(old) & _SEGMENT_ENTRY_INVALID) return old; - if (!MACHINE_HAS_IDTE) { - __pmdp_csp(pmdp); - return old; - } atomic_inc(&mm->context.flush_count); if (MACHINE_HAS_TLB_LC && cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id()))) - __pmdp_idte(addr, pmdp, IDTE_LOCAL); + pmdp_idte_local(mm, addr, pmdp); else - __pmdp_idte(addr, pmdp, IDTE_GLOBAL); + pmdp_idte_global(mm, addr, pmdp); atomic_dec(&mm->context.flush_count); return old; } @@ -325,10 +373,9 @@ static inline pmd_t pmdp_flush_lazy(struct mm_struct *mm, cpumask_of(smp_processor_id()))) { pmd_val(*pmdp) |= _SEGMENT_ENTRY_INVALID; mm->context.flush_mm = 1; - } else if (MACHINE_HAS_IDTE) - __pmdp_idte(addr, pmdp, IDTE_GLOBAL); - else - __pmdp_csp(pmdp); + } else { + pmdp_idte_global(mm, addr, pmdp); + } atomic_dec(&mm->context.flush_count); return old; } @@ -359,6 +406,30 @@ pmd_t pmdp_xchg_lazy(struct mm_struct *mm, unsigned long addr, } EXPORT_SYMBOL(pmdp_xchg_lazy); +static inline void pudp_idte_local(struct mm_struct *mm, + unsigned long addr, pud_t *pudp) +{ + if (MACHINE_HAS_TLB_GUEST) + __pudp_idte(addr, pudp, IDTE_NODAT, IDTE_LOCAL); + else + __pudp_idte(addr, pudp, 0, IDTE_LOCAL); +} + +static inline void pudp_idte_global(struct mm_struct *mm, + unsigned long addr, pud_t *pudp) +{ + if (MACHINE_HAS_TLB_GUEST) + __pudp_idte(addr, pudp, IDTE_NODAT, IDTE_GLOBAL); + else if (MACHINE_HAS_IDTE) + __pudp_idte(addr, pudp, 0, IDTE_GLOBAL); + else + /* + * Invalid bit position is the same for pmd and pud, so we can + * re-use _pmd_csp() here + */ + __pmdp_csp((pmd_t *) pudp); +} + static inline pud_t pudp_flush_direct(struct mm_struct *mm, unsigned long addr, pud_t *pudp) { @@ -367,20 +438,12 @@ static inline pud_t pudp_flush_direct(struct mm_struct *mm, old = *pudp; if (pud_val(old) & _REGION_ENTRY_INVALID) return old; - if (!MACHINE_HAS_IDTE) { - /* - * Invalid bit position is the same for pmd and pud, so we can - * re-use _pmd_csp() here - */ - __pmdp_csp((pmd_t *) pudp); - return old; - } atomic_inc(&mm->context.flush_count); if (MACHINE_HAS_TLB_LC && cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id()))) - __pudp_idte(addr, pudp, IDTE_LOCAL); + pudp_idte_local(mm, addr, pudp); else - __pudp_idte(addr, pudp, IDTE_GLOBAL); + pudp_idte_global(mm, addr, pudp); atomic_dec(&mm->context.flush_count); return old; } @@ -645,7 +708,7 @@ bool test_and_clear_guest_dirty(struct mm_struct *mm, unsigned long addr) pte = *ptep; if (dirty && (pte_val(pte) & _PAGE_PRESENT)) { pgste = pgste_pte_notify(mm, addr, ptep, pgste); - __ptep_ipte(addr, ptep, IPTE_GLOBAL); + ptep_ipte_global(mm, addr, ptep); if (MACHINE_HAS_ESOP || !(pte_val(pte) & _PAGE_WRITE)) pte_val(pte) |= _PAGE_PROTECT; else diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c index efd84d1d178b..bc1fc00910b0 100644 --- a/drivers/s390/char/sclp_early.c +++ b/drivers/s390/char/sclp_early.c @@ -39,7 +39,7 @@ struct read_info_sccb { u8 fac84; /* 84 */ u8 fac85; /* 85 */ u8 _pad_86[91 - 86]; /* 86-90 */ - u8 flags; /* 91 */ + u8 fac91; /* 91 */ u8 _pad_92[98 - 92]; /* 92-97 */ u8 fac98; /* 98 */ u8 hamaxpow; /* 99 */ @@ -103,6 +103,8 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb) sclp.has_kss = !!(sccb->fac98 & 0x01); if (sccb->fac85 & 0x02) S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP; + if (sccb->fac91 & 0x40) + S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_GUEST; sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2; sclp.rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2; sclp.rzm <<= 20; @@ -139,7 +141,7 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb) /* Save IPL information */ sclp_ipl_info.is_valid = 1; - if (sccb->flags & 0x2) + if (sccb->fac91 & 0x2) sclp_ipl_info.has_dump = 1; memcpy(&sclp_ipl_info.loadparm, &sccb->loadparm, LOADPARM_LEN);