AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-24 13:50:52 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

KVM: arm/arm64: Only clean the dcache on translation fault

Browse Source 
The only case where we actually need to perform a dcache maintenance
is when we map the page for the first time, and subsequent permission
faults do not require cache maintenance. Let's make it conditional
on not being a permission fault (and thus a translation fault).

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Marc Zyngier 2017-10-23 17:11:20 +01:00 committed by Christoffer Dall
parent d0e22b4ac3
commit a9c0e12ebe
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
virt/kvm/arm/mmu.c
View File

@ -1400,7 +1400,9 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
new_pmd = kvm_s2pmd_mkwrite(new_pmd);
kvm_set_pfn_dirty(pfn);
}
clean_dcache_guest_page(vcpu, pfn, PMD_SIZE);
if (fault_status != FSC_PERM)
clean_dcache_guest_page(vcpu, pfn, PMD_SIZE);
if (exec_fault) {
new_pmd = kvm_s2pmd_mkexec(new_pmd);
@ -1416,7 +1418,9 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
kvm_set_pfn_dirty(pfn);
mark_page_dirty(kvm, gfn);
}
clean_dcache_guest_page(vcpu, pfn, PAGE_SIZE);
if (fault_status != FSC_PERM)
clean_dcache_guest_page(vcpu, pfn, PAGE_SIZE);
if (exec_fault) {
new_pte = kvm_s2pte_mkexec(new_pte);