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ANDROID: KVM: arm64: Exposes fixblock_map to pKVM modules

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fixblock_map() is a PMD-size version of fixmap_map(). It is intended to
allow the mapping of large pages. Contrary to fixmap_map() it is not
per-CPU but shared.

Bug: 357781595
Bug: 411362768
Change-Id: I6ae6fe407fd7340bba879009bb8a7f1cf2eea50e
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
This commit is contained in:
Vincent Donnefort
2025-04-24 09:30:59 +01:00
committed by Carlos Llamas
parent 87dd5e4d38
commit 58b70f4a59
2 changed files with 12 additions and 0 deletions
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10
arch/arm64/include/asm/kvm_pkvm_module.h
View File

@@ -51,6 +51,14 @@ enum pkvm_psci_notification {
* new mapping is visible.
* @fixmap_unmap: Unmap a page from the hypervisor fixmap. This
* call is required between each @fixmap_map().
* @fixblock_map: Map a PMD-size large page into a CPU-shared
* fixmap. This can be used to replace and speed-up
* a set of @fixmap_map. @fixblock_unmap must be
* called between each mappings to do cache
* maintenance and ensure the new mapping is visible.
* @fixblock_unmap: Unmap a PMD-size large page from the hypervisor
* fixmap. This call is required between each
* @fixblock_map.
* @linear_map_early: Map a large portion of memory into the
* hypervisor linear VA space. This is intended to
* be used only for module bootstrap and must be
@@ -197,6 +205,8 @@ struct pkvm_module_ops {
void (*putx64)(u64 x);
void *(*fixmap_map)(phys_addr_t phys);
void (*fixmap_unmap)(void);
void *(*fixblock_map)(phys_addr_t phys);
void (*fixblock_unmap)(void);
void *(*linear_map_early)(phys_addr_t phys, size_t size, enum kvm_pgtable_prot prot);
void (*linear_unmap_early)(void *addr, size_t size);
void (*flush_dcache_to_poc)(void *addr, size_t size);

2
arch/arm64/kvm/hyp/nvhe/modules.c
View File

@@ -216,6 +216,8 @@ const struct pkvm_module_ops module_ops = {
.putx64 = hyp_putx64,
.fixmap_map = hyp_fixmap_map,
.fixmap_unmap = hyp_fixmap_unmap,
.fixblock_map = hyp_fixblock_map,
.fixblock_unmap = hyp_fixblock_unmap,
.linear_map_early = __pkvm_linear_map_early,
.linear_unmap_early = __pkvm_linear_unmap_early,
.flush_dcache_to_poc = __kvm_flush_dcache_to_poc,