powerpc/kvm: Contiguous memory allocator based RMA allocation
Older version of power architecture use Real Mode Offset register and Real Mode Limit
Selector for mapping guest Real Mode Area. The guest RMA should be physically
contigous since we use the range when address translation is not enabled.
This patch switch RMA allocation code to use contigous memory allocator. The patch
also remove the the linear allocator which not used any more
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 2efa9dd..2b95c45 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -1511,10 +1511,10 @@
static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
- struct kvmppc_linear_info *ri = vma->vm_file->private_data;
struct page *page;
+ struct kvm_rma_info *ri = vma->vm_file->private_data;
- if (vmf->pgoff >= ri->npages)
+ if (vmf->pgoff >= kvm_rma_pages)
return VM_FAULT_SIGBUS;
page = pfn_to_page(ri->base_pfn + vmf->pgoff);
@@ -1536,7 +1536,7 @@
static int kvm_rma_release(struct inode *inode, struct file *filp)
{
- struct kvmppc_linear_info *ri = filp->private_data;
+ struct kvm_rma_info *ri = filp->private_data;
kvm_release_rma(ri);
return 0;
@@ -1549,8 +1549,17 @@
long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret)
{
- struct kvmppc_linear_info *ri;
long fd;
+ struct kvm_rma_info *ri;
+ /*
+ * Only do this on PPC970 in HV mode
+ */
+ if (!cpu_has_feature(CPU_FTR_HVMODE) ||
+ !cpu_has_feature(CPU_FTR_ARCH_201))
+ return -EINVAL;
+
+ if (!kvm_rma_pages)
+ return -EINVAL;
ri = kvm_alloc_rma();
if (!ri)
@@ -1560,7 +1569,7 @@
if (fd < 0)
kvm_release_rma(ri);
- ret->rma_size = ri->npages << PAGE_SHIFT;
+ ret->rma_size = kvm_rma_pages << PAGE_SHIFT;
return fd;
}
@@ -1725,7 +1734,7 @@
{
int err = 0;
struct kvm *kvm = vcpu->kvm;
- struct kvmppc_linear_info *ri = NULL;
+ struct kvm_rma_info *ri = NULL;
unsigned long hva;
struct kvm_memory_slot *memslot;
struct vm_area_struct *vma;
@@ -1803,7 +1812,7 @@
} else {
/* Set up to use an RMO region */
- rma_size = ri->npages;
+ rma_size = kvm_rma_pages;
if (rma_size > memslot->npages)
rma_size = memslot->npages;
rma_size <<= PAGE_SHIFT;
@@ -1831,14 +1840,14 @@
/* POWER7 */
lpcr &= ~(LPCR_VPM0 | LPCR_VRMA_L);
lpcr |= rmls << LPCR_RMLS_SH;
- kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT;
+ kvm->arch.rmor = ri->base_pfn << PAGE_SHIFT;
}
kvm->arch.lpcr = lpcr;
pr_info("KVM: Using RMO at %lx size %lx (LPCR = %lx)\n",
ri->base_pfn << PAGE_SHIFT, rma_size, lpcr);
/* Initialize phys addrs of pages in RMO */
- npages = ri->npages;
+ npages = kvm_rma_pages;
porder = __ilog2(npages);
physp = memslot->arch.slot_phys;
if (physp) {