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| author | Quentin Perret <qperret@google.com> | 2021-12-15 16:12:18 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-12-16 12:58:55 +0000 |
| commit | 1fac3cfb9cc60d71b66ee5127b2bc5b5f9f79df8 (patch) | |
| tree | 1abf3fa55ee3b175cc4aa4e84004dad70de65faf /arch/arm64/kvm/hyp/nvhe/early_alloc.c | |
| parent | 2d761dbf7ff48b7eca4486658c5995b9669bcbbc (diff) | |
| download | linux-stable-1fac3cfb9cc60d71b66ee5127b2bc5b5f9f79df8.tar.gz linux-stable-1fac3cfb9cc60d71b66ee5127b2bc5b5f9f79df8.tar.bz2 linux-stable-1fac3cfb9cc60d71b66ee5127b2bc5b5f9f79df8.zip | |
KVM: arm64: Provide {get,put}_page() stubs for early hyp allocator
In nVHE protected mode, the EL2 code uses a temporary allocator during
boot while re-creating its stage-1 page-table. Unfortunately, the
hyp_vmmemap is not ready to use at this stage, so refcounting pages
is not possible. That is not currently a problem because hyp stage-1
mappings are never removed, which implies refcounting of page-table
pages is unnecessary.
In preparation for allowing hypervisor stage-1 mappings to be removed,
provide stub implementations for {get,put}_page() in the early allocator.
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211215161232.1480836-2-qperret@google.com
Diffstat (limited to 'arch/arm64/kvm/hyp/nvhe/early_alloc.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/early_alloc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/early_alloc.c b/arch/arm64/kvm/hyp/nvhe/early_alloc.c index 1306c430ab87..00de04153cc6 100644 --- a/arch/arm64/kvm/hyp/nvhe/early_alloc.c +++ b/arch/arm64/kvm/hyp/nvhe/early_alloc.c @@ -43,6 +43,9 @@ void *hyp_early_alloc_page(void *arg) return hyp_early_alloc_contig(1); } +static void hyp_early_alloc_get_page(void *addr) { } +static void hyp_early_alloc_put_page(void *addr) { } + void hyp_early_alloc_init(void *virt, unsigned long size) { base = cur = (unsigned long)virt; @@ -51,4 +54,6 @@ void hyp_early_alloc_init(void *virt, unsigned long size) hyp_early_alloc_mm_ops.zalloc_page = hyp_early_alloc_page; hyp_early_alloc_mm_ops.phys_to_virt = hyp_phys_to_virt; hyp_early_alloc_mm_ops.virt_to_phys = hyp_virt_to_phys; + hyp_early_alloc_mm_ops.get_page = hyp_early_alloc_get_page; + hyp_early_alloc_mm_ops.put_page = hyp_early_alloc_put_page; } |