lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

KVM: MMU: Switch to mmu spinlock

Browse Source 
Convert the synchronization of the shadow handling to a separate mmu_lock
spinlock.

Also guard fetch() by mmap_sem in read-mode to protect against alias
and memslot changes.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Marcelo Tosatti
2007-12-20 19:18:26 -05:00
committed by Avi Kivity
parent d7824fff89
commit aaee2c94f7
5 changed files with 35 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/kvm/vmx.c
View File

@@ -1477,7 +1477,6 @@ static int alloc_apic_access_page(struct kvm *kvm)
struct kvm_userspace_memory_region kvm_userspace_mem;
int r = 0;
mutex_lock(&kvm->lock);
down_write(&current->mm->mmap_sem);
if (kvm->arch.apic_access_page)
goto out;
@@ -1491,7 +1490,6 @@ static int alloc_apic_access_page(struct kvm *kvm)
kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00);
out:
up_write(&current->mm->mmap_sem);
mutex_unlock(&kvm->lock);
return r;
}