Now that HGM is fully supported for GENERAL_HUGETLB, x86 can enable it.
The x86 KVM MMU already properly handles HugeTLB HGM pages (it does a
page table walk to determine which size to use in the second-stage page
table instead of, for example, checking vma_mmu_pagesize, like arm64
does).
We could also enable HugeTLB HGM for arm (32-bit) at this point, as it
also uses GENERAL_HUGETLB and I don't see anything else that is needed
for it. However, I haven't tested on arm at all, so I won't enable it.
Signed-off-by: James Houghton <[email protected]>
---
arch/x86/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 6d1879ef933a..6d7103266e61 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -124,6 +124,7 @@ config X86
select ARCH_WANT_GENERAL_HUGETLB
select ARCH_WANT_HUGE_PMD_SHARE
select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP if X86_64
+ select ARCH_WANT_HUGETLB_HIGH_GRANULARITY_MAPPING
select ARCH_WANT_LD_ORPHAN_WARN
select ARCH_WANTS_THP_SWAP if X86_64
select ARCH_HAS_PARANOID_L1D_FLUSH
--
2.38.0.135.g90850a2211-goog