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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2017-03-30 11:07:28 +0300
committerIngo Molnar <mingo@kernel.org>2017-04-04 09:22:34 +0300
commit335437fbf7d3a630d775f06c9ee37d60919561d8 (patch)
tree88cab3cf94d723c1f9bec1697da1117759af8200 /arch/x86/include/asm/paravirt.h
parent4c7c44837be77e2689c577abef155c4b5d873c82 (diff)
downloadlinux-335437fbf7d3a630d775f06c9ee37d60919561d8.tar.xz
x86/paravirt: Add 5-level support to the paravirt code
Add operations to allocate/release p4ds. Xen requires more work. We will need to come back to it. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arch@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20170330080731.65421-5-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/paravirt.h')
-rw-r--r--arch/x86/include/asm/paravirt.h37
1 files changed, 26 insertions, 11 deletions
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 158d877ce9e9..55fa56fe4e45 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -357,6 +357,16 @@ static inline void paravirt_release_pud(unsigned long pfn)
PVOP_VCALL1(pv_mmu_ops.release_pud, pfn);
}
+static inline void paravirt_alloc_p4d(struct mm_struct *mm, unsigned long pfn)
+{
+ PVOP_VCALL2(pv_mmu_ops.alloc_p4d, mm, pfn);
+}
+
+static inline void paravirt_release_p4d(unsigned long pfn)
+{
+ PVOP_VCALL1(pv_mmu_ops.release_p4d, pfn);
+}
+
static inline void pte_update(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
{
@@ -582,25 +592,25 @@ static inline void set_p4d(p4d_t *p4dp, p4d_t p4d)
val);
}
-static inline void p4d_clear(p4d_t *p4dp)
+#if CONFIG_PGTABLE_LEVELS >= 5
+
+static inline p4d_t __p4d(p4dval_t val)
{
- set_p4d(p4dp, __p4d(0));
-}
+ p4dval_t ret = PVOP_CALLEE1(p4dval_t, pv_mmu_ops.make_p4d, val);
-#if CONFIG_PGTABLE_LEVELS >= 5
+ return (p4d_t) { ret };
+}
-#error FIXME
+static inline p4dval_t p4d_val(p4d_t p4d)
+{
+ return PVOP_CALLEE1(p4dval_t, pv_mmu_ops.p4d_val, p4d.p4d);
+}
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);
+ PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp, val);
}
static inline void pgd_clear(pgd_t *pgdp)
@@ -610,6 +620,11 @@ static inline void pgd_clear(pgd_t *pgdp)
#endif /* CONFIG_PGTABLE_LEVELS == 5 */
+static inline void p4d_clear(p4d_t *p4dp)
+{
+ set_p4d(p4dp, __p4d(0));
+}
+
#endif /* CONFIG_PGTABLE_LEVELS == 4 */
#endif /* CONFIG_PGTABLE_LEVELS >= 3 */