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[2/2] PPC: KVM: Make NX bit available with magic page

Message ID 1399850455-23327-1-git-send-email-agraf@suse.de (mailing list archive)
State New, archived
Headers show

Commit Message

Alexander Graf May 11, 2014, 11:20 p.m. UTC 
Because old kernels enable the magic page and then choke on NXed trampoline
code we have to disable NX by default in KVM when we use the magic page.

However, since commit b18db0b8 we have successfully fixed that and can now
leave NX enabled, so tell the hypervisor about this.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 arch/powerpc/kernel/kvm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c
index 6a01752..5e6f24f 100644
--- a/arch/powerpc/kernel/kvm.c
+++ b/arch/powerpc/kernel/kvm.c
@@ -417,7 +417,7 @@  static void kvm_map_magic_page(void *data)
 	ulong out[8];
 
 	in[0] = KVM_MAGIC_PAGE;
-	in[1] = KVM_MAGIC_PAGE;
+	in[1] = KVM_MAGIC_PAGE | MAGIC_PAGE_FLAG_NOT_MAPPED_NX;
 
 	epapr_hypercall(in, out, KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE));