linux-kernel - [PULL 16/19] KVM: SVM: Add module parameter to enable SEV-SNP

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Date: Fri, 10 May 2024 16:10:21 -0500
From: Michael Roth <michael.roth@....com>
To: Paolo Bonzini <pbonzini@...hat.com>
CC: <kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Sean Christopherson
	<seanjc@...gle.com>, Brijesh Singh <brijesh.singh@....com>, Ashish Kalra
	<ashish.kalra@....com>
Subject: [PULL 16/19] KVM: SVM: Add module parameter to enable SEV-SNP

From: Brijesh Singh <brijesh.singh@....com>

Add a module parameter than can be used to enable or disable the SEV-SNP
feature. Now that KVM contains the support for the SNP set the GHCB
hypervisor feature flag to indicate that SNP is supported.

Signed-off-by: Brijesh Singh <brijesh.singh@....com>
Reviewed-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Ashish Kalra <ashish.kalra@....com>
Message-ID: <20240501085210.2213060-18-michael.roth@....com>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/x86/kvm/svm/sev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 2b88ae9a4f48..eb397ec22a47 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -49,7 +49,8 @@ static bool sev_es_enabled = true;
 module_param_named(sev_es, sev_es_enabled, bool, 0444);
 
 /* enable/disable SEV-SNP support */
-static bool sev_snp_enabled;
+static bool sev_snp_enabled = true;
+module_param_named(sev_snp, sev_snp_enabled, bool, 0444);
 
 /* enable/disable SEV-ES DebugSwap support */
 static bool sev_es_debug_swap_enabled = true;
-- 
2.25.1