linux-kernel - [PATCH 3.12 12/63] arm64: KVM: Force undefined exception for Guest SMC intructions

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Message-Id: <5c792059d2d57a19a19ab49507acdf0b8d0d5dd6.1430387326.git.jslaby@suse.cz>
Date:	Thu, 30 Apr 2015 14:11:41 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Anup Patel <anup.patel@...aro.org>,
	Pranavkumar Sawargaonkar <pranavkumar@...aro.org>,
	marc Zyngier <marc.zyngier@....com>,
	Shannon Zhao <shannon.zhao@...aro.org>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 12/63] arm64: KVM: Force undefined exception for Guest SMC intructions

From: Anup Patel <anup.patel@...aro.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit e5cf9dcdbfd26cd4e1991db08755da900454efeb upstream.

The SMC-based PSCI emulation for Guest is going to be very different
from the in-kernel HVC-based PSCI emulation hence for now just inject
undefined exception when Guest executes SMC instruction.

Signed-off-by: Anup Patel <anup.patel@...aro.org>
Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@...aro.org>
Signed-off-by: marc Zyngier <marc.zyngier@....com>
Signed-off-by: Shannon Zhao <shannon.zhao@...aro.org>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 arch/arm64/kvm/handle_exit.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c
index 8da56067c304..df84d7bcc7df 100644
--- a/arch/arm64/kvm/handle_exit.c
+++ b/arch/arm64/kvm/handle_exit.c
@@ -39,9 +39,6 @@ static int handle_hvc(struct kvm_vcpu *vcpu, struct kvm_run *run)
 
 static int handle_smc(struct kvm_vcpu *vcpu, struct kvm_run *run)
 {
-	if (kvm_psci_call(vcpu))
-		return 1;
-
 	kvm_inject_undefined(vcpu);
 	return 1;
 }
-- 
2.3.5

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