s390/mm: add guest ASCE TLB flush optimization
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index c927138..b20b0f7 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -953,9 +953,11 @@ static inline pte_t pte_mkhuge(pte_t pte)
#define IPTE_LOCAL 1
#define IPTE_NODAT 0x400
+#define IPTE_GUEST_ASCE 0x800
static inline void __ptep_ipte(unsigned long address, pte_t *ptep,
- unsigned long opt, int local)
+ unsigned long opt, unsigned long asce,
+ int local)
{
unsigned long pto = (unsigned long) ptep;
@@ -969,6 +971,7 @@ static inline void __ptep_ipte(unsigned long address, pte_t *ptep,
}
/* Invalidate ptes with options + TLB flush of the ptes */
+ opt = opt | (asce & _ASCE_ORIGIN);
asm volatile(
" .insn rrf,0xb2210000,%[r1],%[r2],%[r3],%[m4]"
: [r2] "+a" (address), [r3] "+a" (opt)
@@ -1355,34 +1358,59 @@ static inline void __pmdp_csp(pmd_t *pmdp)
#define IDTE_PTOA 0x0800
#define IDTE_NODAT 0x1000
+#define IDTE_GUEST_ASCE 0x2000
static inline void __pmdp_idte(unsigned long addr, pmd_t *pmdp,
- unsigned long opt, int local)
+ unsigned long opt, unsigned long asce,
+ int local)
{
unsigned long sto;
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" ((addr & HPAGE_MASK) | opt),
- [m4] "i" (local)
- : "cc" );
+ if (__builtin_constant_p(opt) && opt == 0) {
+ /* flush without guest asce */
+ asm volatile(
+ " .insn rrf,0xb98e0000,%[r1],%[r2],0,%[m4]"
+ : "+m" (*pmdp)
+ : [r1] "a" (sto), [r2] "a" ((addr & HPAGE_MASK)),
+ [m4] "i" (local)
+ : "cc" );
+ } else {
+ /* flush with guest asce */
+ asm volatile(
+ " .insn rrf,0xb98e0000,%[r1],%[r2],%[r3],%[m4]"
+ : "+m" (*pmdp)
+ : [r1] "a" (sto), [r2] "a" ((addr & HPAGE_MASK) | opt),
+ [r3] "a" (asce), [m4] "i" (local)
+ : "cc" );
+ }
}
static inline void __pudp_idte(unsigned long addr, pud_t *pudp,
- unsigned long opt, int local)
+ unsigned long opt, unsigned long asce,
+ int local)
{
unsigned long r3o;
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" ((addr & PUD_MASK) | opt),
- [m4] "i" (local)
- : "cc" );
+ if (__builtin_constant_p(opt) && opt == 0) {
+ /* flush without guest asce */
+ asm volatile(
+ " .insn rrf,0xb98e0000,%[r1],%[r2],0,%[m4]"
+ : "+m" (*pudp)
+ : [r1] "a" (r3o), [r2] "a" ((addr & PUD_MASK)),
+ [m4] "i" (local)
+ : "cc");
+ } else {
+ /* flush with guest asce */
+ asm volatile(
+ " .insn rrf,0xb98e0000,%[r1],%[r2],%[r3],%[m4]"
+ : "+m" (*pudp)
+ : [r1] "a" (r3o), [r2] "a" ((addr & PUD_MASK) | opt),
+ [r3] "a" (asce), [m4] "i" (local)
+ : "cc" );
+ }
}
pmd_t pmdp_xchg_direct(struct mm_struct *, unsigned long, pmd_t *, pmd_t);