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| author | Punit Agrawal <punit.agrawal@arm.com> | 2018-12-11 17:10:41 +0000 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-12-18 15:14:49 +0000 |
| commit | b8e0ba7c8bea994011aff3b4c35256b180fab874 (patch) | |
| tree | f121e1e3e828dbea5616361533fd7c88d6fc65d7 /arch/arm64/include/asm/pgtable.h | |
| parent | 35a63966194dd994f44150f07398c62f8dca011e (diff) | |
| download | lwn-b8e0ba7c8bea994011aff3b4c35256b180fab874.tar.gz lwn-b8e0ba7c8bea994011aff3b4c35256b180fab874.zip | |
KVM: arm64: Add support for creating PUD hugepages at stage 2
KVM only supports PMD hugepages at stage 2. Now that the various page
handling routines are updated, extend the stage 2 fault handling to
map in PUD hugepages.
Addition of PUD hugepage support enables additional page sizes (e.g.,
1G with 4K granule) which can be useful on cores that support mapping
larger block sizes in the TLB entries.
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
[ Replace BUG() => WARN_ON(1) for arm32 PUD helpers ]
Signed-off-by: Suzuki Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/pgtable.h')
| -rw-r--r-- | arch/arm64/include/asm/pgtable.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index bb0f3f17a7a9..576128635f3c 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -390,6 +390,8 @@ static inline int pmd_protnone(pmd_t pmd) #define pud_mkyoung(pud) pte_pud(pte_mkyoung(pud_pte(pud))) #define pud_write(pud) pte_write(pud_pte(pud)) +#define pud_mkhuge(pud) (__pud(pud_val(pud) & ~PUD_TABLE_BIT)) + #define __pud_to_phys(pud) __pte_to_phys(pud_pte(pud)) #define __phys_to_pud_val(phys) __phys_to_pte_val(phys) #define pud_pfn(pud) ((__pud_to_phys(pud) & PUD_MASK) >> PAGE_SHIFT) |