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UPSTREAM: KVM: arm64: Introduce addr_is_memory()

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Introduce a helper usable in nVHE protected mode to check whether a
physical address is in a RAM region or not.

Signed-off-by: Quentin Perret <qperret@google.com>
Reviewed-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210809152448.1810400-16-qperret@google.com
(cherry picked from commit e009dce129)
Signed-off-by: Will Deacon <willdeacon@google.com>
Bug: 198418208
Change-Id: Ia078d8a5d6402739e3f664e9e7a4dde135efc476
This commit is contained in:
Quentin Perret
2021-08-09 16:24:42 +01:00
committed by Will Deacon
parent 08d3caa584
commit c2c7150633
2 changed files with 8 additions and 0 deletions
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1
arch/arm64/kvm/hyp/include/nvhe/mem_protect.h
View File

@@ -51,6 +51,7 @@ extern const u8 pkvm_hyp_id;
int __pkvm_prot_finalize(void);
int __pkvm_mark_hyp(phys_addr_t start, phys_addr_t end);
bool addr_is_memory(phys_addr_t phys);
int host_stage2_idmap_locked(phys_addr_t addr, u64 size, enum kvm_pgtable_prot prot);
int host_stage2_set_owner_locked(phys_addr_t addr, u64 size, u8 owner_id);
int kvm_host_prepare_stage2(void *pgt_pool_base);

7
arch/arm64/kvm/hyp/nvhe/mem_protect.c
View File

@@ -197,6 +197,13 @@ static bool find_mem_range(phys_addr_t addr, struct kvm_mem_range *range)
return false;
}
bool addr_is_memory(phys_addr_t phys)
{
struct kvm_mem_range range;
return find_mem_range(phys, &range);
}
static bool range_is_memory(u64 start, u64 end)
{
struct kvm_mem_range r1, r2;