[RFC PATCH 24/27] KVM: arm64: Make memcache anonymous in pgtable allocator
From: Quentin Perret <hidden>
Date: 2020-11-17 18:17:40
Also in:
kvmarm, linux-devicetree, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
The current stage2 page-table allocator uses a memcache to get pre-allocated pages when it needs any. To allow re-using this code at EL2 which uses a concept of memory pools, make the memcache argument to kvm_pgtable_stage2_map() anonymous. and let the mm_ops zalloc_page() callbacks use it the way they need to. Signed-off-by: Quentin Perret <redacted> --- arch/arm64/include/asm/kvm_pgtable.h | 6 +++--- arch/arm64/kvm/hyp/pgtable.c | 4 ++-- 2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h
index 8e8f1d2c5e0e..d846bc3d3b77 100644
--- a/arch/arm64/include/asm/kvm_pgtable.h
+++ b/arch/arm64/include/asm/kvm_pgtable.h@@ -176,8 +176,8 @@ void kvm_pgtable_stage2_destroy(struct kvm_pgtable *pgt); * @size: Size of the mapping. * @phys: Physical address of the memory to map. * @prot: Permissions and attributes for the mapping. - * @mc: Cache of pre-allocated GFP_PGTABLE_USER memory from which to - * allocate page-table pages. + * @mc: Cache of pre-allocated memory from which to allocate page-table + * pages. * * The offset of @addr within a page is ignored, @size is rounded-up to * the next page boundary and @phys is rounded-down to the previous page
@@ -194,7 +194,7 @@ void kvm_pgtable_stage2_destroy(struct kvm_pgtable *pgt); */ int kvm_pgtable_stage2_map(struct kvm_pgtable *pgt, u64 addr, u64 size, u64 phys, enum kvm_pgtable_prot prot, - struct kvm_mmu_memory_cache *mc); + void *mc); /** * kvm_pgtable_stage2_unmap() - Remove a mapping from a guest stage-2 page-table.
diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c
index 96a25d0b7b6e..5dd1b4978fe8 100644
--- a/arch/arm64/kvm/hyp/pgtable.c
+++ b/arch/arm64/kvm/hyp/pgtable.c@@ -443,7 +443,7 @@ struct stage2_map_data { kvm_pte_t *anchor; struct kvm_s2_mmu *mmu; - struct kvm_mmu_memory_cache *memcache; + void *memcache; struct kvm_pgtable_mm_ops *mm_ops; };
@@ -613,7 +613,7 @@ static int stage2_map_walker(u64 addr, u64 end, u32 level, kvm_pte_t *ptep, int kvm_pgtable_stage2_map(struct kvm_pgtable *pgt, u64 addr, u64 size, u64 phys, enum kvm_pgtable_prot prot, - struct kvm_mmu_memory_cache *mc) + void *mc) { int ret; struct stage2_map_data map_data = {
--
2.29.2.299.gdc1121823c-goog
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