* [PATCH v1 1/1] KVM: s390: fix for hugepage vmalloc
@ 2021-05-26 15:44 Claudio Imbrenda
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From: Claudio Imbrenda @ 2021-05-26 15:44 UTC (permalink / raw)
To: linux-kernel
Cc: kvm, linux-s390, david, cohuck, kvm390-list, borntraeger, frankja
The Create Secure Configuration Ultravisor Call does not support using
large pages for the virtual memory area.
This patch replaces the vzalloc call with a longer but equivalent
__vmalloc_node_range call, also setting the VM_NO_HUGE_VMAP flag, to
guarantee that this allocation will not be performed with large pages.
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
---
arch/s390/kvm/pv.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/s390/kvm/pv.c b/arch/s390/kvm/pv.c
index 813b6e93dc83..2c848606d7b9 100644
--- a/arch/s390/kvm/pv.c
+++ b/arch/s390/kvm/pv.c
@@ -140,7 +140,10 @@ static int kvm_s390_pv_alloc_vm(struct kvm *kvm)
/* Allocate variable storage */
vlen = ALIGN(virt * ((npages * PAGE_SIZE) / HPAGE_SIZE), PAGE_SIZE);
vlen += uv_info.guest_virt_base_stor_len;
- kvm->arch.pv.stor_var = vzalloc(vlen);
+ kvm->arch.pv.stor_var = __vmalloc_node_range(vlen, PAGE_SIZE, VMALLOC_START, VMALLOC_END,
+ GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL,
+ VM_NO_HUGE_VMAP, NUMA_NO_NODE,
+ __builtin_return_address(0));
if (!kvm->arch.pv.stor_var)
goto out_err;
return 0;
--
2.31.1
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