From: Nicholas Piggin <npiggin@gmail.com>
To: kvm-ppc@vger.kernel.org
Subject: [PATCH 5/5] KVM: PPC: Book3S HV: Reject mflags=2 (LPCR[AIL]=2) ADDR_TRANS_MODE mode
Date: Mon, 20 May 2019 00:56:59 +0000 [thread overview]
Message-ID: <20190520005659.18628-5-npiggin@gmail.com> (raw)
AIL=2 mode has no known users, so is not well tested or supported.
Disallow guests from selecting this mode because it may become
deprecated in future versions of the architecture.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/kvm/book3s_hv.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 36d16740748a..4295ccdbee26 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -784,6 +784,11 @@ static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags,
vcpu->arch.dawr = value1;
vcpu->arch.dawrx = value2;
return H_SUCCESS;
+ case H_SET_MODE_RESOURCE_ADDR_TRANS_MODE:
+ /* KVM does not support mflags=2 (AIL=2) */
+ if (mflags != 0 && mflags != 3)
+ return H_UNSUPPORTED_FLAG_START;
+ return H_TOO_HARD;
default:
return H_TOO_HARD;
}
--
2.20.1
next reply other threads:[~2019-05-20 0:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-20 0:56 Nicholas Piggin [this message]
2019-06-17 5:58 ` [PATCH 5/5] KVM: PPC: Book3S HV: Reject mflags=2 (LPCR[AIL]=2) ADDR_TRANS_MODE mode Paul Mackerras
2019-06-19 3:09 ` Nicholas Piggin
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