shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 03:15:31 +09:00
Code Issues Packages Projects Releases Wiki Activity

ANDROID: KVM: arm64: Add hyp_memcache helpers for the kernel

Browse Source 
Introduce helper functions easing the manipulation of a hyp_memcache
from the kernel.

Signed-off-by: Quentin Perret <qperret@google.com>
Bug: 209580772
Change-Id: I42f2718e059f0cb32b7007e390ba758ba68ddd0c
Signed-off-by: Will Deacon <willdeacon@google.com>
This commit is contained in:
Quentin Perret
2021-10-21 10:19:05 +01:00
committed by Will Deacon
parent 4170e1abe7
commit e9e9cffee9
1 changed files with 27 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
arch/arm64/kvm/mmu.c
View File

@@ -776,6 +776,33 @@ void kvm_free_stage2_pgd(struct kvm_s2_mmu *mmu)
}
}
static void hyp_mc_free_fn(void *addr, void *unused)
{
free_page((unsigned long)addr);
}
static void *hyp_mc_alloc_fn(void *unused)
{
return (void *)__get_free_page(GFP_KERNEL_ACCOUNT);
}
void free_hyp_memcache(struct kvm_hyp_memcache *mc)
{
if (is_protected_kvm_enabled())
__free_hyp_memcache(mc, hyp_mc_free_fn,
kvm_host_va, NULL);
}
static int topup_hyp_memcache(struct kvm_hyp_memcache *mc,
unsigned long min_pages)
{
if (!is_protected_kvm_enabled())
return 0;
return __topup_hyp_memcache(mc, min_pages, hyp_mc_alloc_fn,
kvm_host_pa, NULL);
}
/**
* kvm_phys_addr_ioremap - map a device range to guest IPA
*