s390/mm: add no-dat TLB flush optimization

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 29 insertions, 12 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);