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KVM: arm64: Add flags to kvm_hyp_memcache

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Add flags to kvm_hyp_memcache and propagate the latter to the allocation
and free callbacks. This will later allow to account for memory, based
on the memcache configuration.

Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250313114038.1502357-2-vdonnefort@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Vincent Donnefort
2025-03-13 11:40:36 +00:00
committed by Oliver Upton
parent 0ad2507d5d
commit cf2d228da9
2 changed files with 5 additions and 4 deletions
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1
arch/arm64/include/asm/kvm_host.h
View File

@@ -86,6 +86,7 @@ struct kvm_hyp_memcache {
phys_addr_t head;
unsigned long nr_pages;
struct pkvm_mapping *mapping; /* only used from EL1 */
unsigned long flags;
};
static inline void push_hyp_memcache(struct kvm_hyp_memcache *mc,

8
arch/arm64/kvm/mmu.c
View File

@@ -1086,12 +1086,12 @@ void kvm_free_stage2_pgd(struct kvm_s2_mmu *mmu)
}
}
static void hyp_mc_free_fn(void *addr, void *unused)
static void hyp_mc_free_fn(void *addr, void *mc)
{
free_page((unsigned long)addr);
}
static void *hyp_mc_alloc_fn(void *unused)
static void *hyp_mc_alloc_fn(void *mc)
{
return (void *)__get_free_page(GFP_KERNEL_ACCOUNT);
}
@@ -1102,7 +1102,7 @@ void free_hyp_memcache(struct kvm_hyp_memcache *mc)
return;
kfree(mc->mapping);
__free_hyp_memcache(mc, hyp_mc_free_fn, kvm_host_va, NULL);
__free_hyp_memcache(mc, hyp_mc_free_fn, kvm_host_va, mc);
}
int topup_hyp_memcache(struct kvm_hyp_memcache *mc, unsigned long min_pages)
@@ -1117,7 +1117,7 @@ int topup_hyp_memcache(struct kvm_hyp_memcache *mc, unsigned long min_pages)
}
return __topup_hyp_memcache(mc, min_pages, hyp_mc_alloc_fn,
kvm_host_pa, NULL);
kvm_host_pa, mc);
}
/**