summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/s390/include/asm/pgtable.h41
-rw-r--r--arch/s390/include/asm/setup.h6
-rw-r--r--arch/s390/include/asm/tlbflush.h5
-rw-r--r--arch/s390/mm/pageattr.c2
-rw-r--r--arch/s390/mm/pgtable.c111
-rw-r--r--drivers/s390/char/sclp_early.c6
6 files changed, 129 insertions, 42 deletions
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 <asm/mmu_context.h>
#include <asm/page-states.h>
+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;
}
@@ -359,28 +406,44 @@ pmd_t pmdp_xchg_lazy(struct mm_struct *mm, unsigned long addr,
}
EXPORT_SYMBOL(pmdp_xchg_lazy);
-static inline pud_t pudp_flush_direct(struct mm_struct *mm,
- unsigned long addr, pud_t *pudp)
+static inline void pudp_idte_local(struct mm_struct *mm,
+ unsigned long addr, pud_t *pudp)
{
- pud_t old;
+ if (MACHINE_HAS_TLB_GUEST)
+ __pudp_idte(addr, pudp, IDTE_NODAT, IDTE_LOCAL);
+ else
+ __pudp_idte(addr, pudp, 0, IDTE_LOCAL);
+}
- old = *pudp;
- if (pud_val(old) & _REGION_ENTRY_INVALID)
- return old;
- if (!MACHINE_HAS_IDTE) {
+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)
+{
+ pud_t old;
+
+ old = *pudp;
+ if (pud_val(old) & _REGION_ENTRY_INVALID)
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);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-29 13:13:43 +0300