Re: [RFC PATCH v2 24/26] KVM: arm64: Make memcache anonymous in pgtable allocator
From: Will Deacon <will@kernel.org>
Date: 2021-02-03 16:01:20
Also in:
kvmarm, linux-devicetree, lkml
From: Will Deacon <will@kernel.org>
Date: 2021-02-03 16:01:20
Also in:
kvmarm, linux-devicetree, lkml
On Fri, Jan 08, 2021 at 12:15:22PM +0000, Quentin Perret wrote:
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.
We should probably mention that this memory must be zeroed, since I don't think the page-table code takes care of that. Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel