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KVM: PPC: Book3S HV: Fix setting of storage key in H_ENTER

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In handling a H_ENTER hypercall, the code in kvmppc_do_h_enter
clobbers the high-order two bits of the storage key, which is stored
in a split field in the second doubleword of the HPTE.  Any storage
key number above 7 hence fails to operate correctly.

This makes sure we preserve all the bits of the storage key.

Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Ram Pai
2017-07-31 14:39:59 -07:00
committed by Paul Mackerras
parent 50a1a25987
commit d182b8fd60
2 changed files with 2 additions and 1 deletions
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2
arch/powerpc/kvm/book3s_hv_rm_mmu.c
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@@ -269,7 +269,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
if (!realmode)
local_irq_restore(irq_flags);
ptel &= ~(HPTE_R_PP0 - psize);
ptel &= HPTE_R_KEY | HPTE_R_PP0 | (psize-1);
ptel |= pa;
if (pa)