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Subject[PATCH 2/4] include/asm-x86/paravirt.h: x86_64 mmu operations
Date
Add .set_pgd field to pv_mmu_ops.

Implement pud_val(), __pud(), set_pgd(), pud_clear(), pgd_clear().

pud_clear() and pgd_clear() are implemented simply using set_pud()
and set_pmd(). They don't have a field at pv_mmu_ops.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
include/asm-x86/paravirt.h | 55 ++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 55 insertions(+), 0 deletions(-)
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 62cecb7..9f9ff57 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -259,6 +259,8 @@ struct pv_mmu_ops {
#if PAGETABLE_LEVELS == 4
pudval_t (*pud_val)(pud_t);
pud_t (*make_pud)(pudval_t pud);
+
+ void (*set_pgd)(pgd_t *pudp, pgd_t pgdval);
#endif /* PAGETABLE_LEVELS == 4 */
#endif /* PAGETABLE_LEVELS >= 3 */

@@ -1065,6 +1067,59 @@ static inline void set_pud(pud_t *pudp, pud_t pud)
PVOP_VCALL2(pv_mmu_ops.set_pud, pudp,
val);
}
+#if PAGETABLE_LEVELS == 4
+static inline pud_t __pud(pudval_t val)
+{
+ pudval_t ret;
+
+ if (sizeof(pudval_t) > sizeof(long))
+ ret = PVOP_CALL2(pudval_t, pv_mmu_ops.make_pud,
+ val, (u64)val >> 32);
+ else
+ ret = PVOP_CALL1(pudval_t, pv_mmu_ops.make_pud,
+ val);
+
+ return (pud_t) { ret };
+}
+
+static inline pudval_t pud_val(pud_t pud)
+{
+ pudval_t ret;
+
+ if (sizeof(pudval_t) > sizeof(long))
+ ret = PVOP_CALL2(pudval_t, pv_mmu_ops.pud_val,
+ pud.pud, (u64)pud.pud >> 32);
+ else
+ ret = PVOP_CALL1(pudval_t, pv_mmu_ops.pud_val,
+ pud.pud);
+
+ return ret;
+}
+
+static inline void set_pgd(pgd_t *pgdp, pgd_t pgd)
+{
+ pgdval_t val = native_pgd_val(pgd);
+
+ if (sizeof(pgdval_t) > sizeof(long))
+ PVOP_VCALL3(pv_mmu_ops.set_pgd, pgdp,
+ val, (u64)val >> 32);
+ else
+ PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp,
+ val);
+}
+
+static inline void pgd_clear(pgd_t *pgdp)
+{
+ set_pgd(pgdp, __pgd(0));
+}
+
+static inline void pud_clear(pud_t *pudp)
+{
+ set_pud(pudp, __pud(0));
+}
+
+#endif /* PAGETABLE_LEVELS == 4 */
+
#endif /* PAGETABLE_LEVELS >= 3 */

#ifdef CONFIG_X86_PAE
--
1.5.3.4


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