linux-kernel - [PATCH 2/2] KVM: SVM: Tag sev_supported_vmsa

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Message-ID: <20260109033101.1005769-3-seanjc@google.com>
Date: Thu,  8 Jan 2026 19:31:01 -0800
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Tom Lendacky <thomas.lendacky@....com>
Subject: [PATCH 2/2] KVM: SVM: Tag sev_supported_vmsa_features as read-only
 after init

Tag sev_supported_vmsa_features with __ro_after_init as it's configured by
sev_hardware_setup() and never written after initial configuration (and if
it were, that'd be a blatant bug).

Opportunistically relocate the variable out of the module params area now
that sev_es_debug_swap_enabled is gone (which largely motivated its
original location).

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 arch/x86/kvm/svm/sev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 9b92f0cccfe6..28150506b18c 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -53,8 +53,6 @@ module_param_named(sev_es, sev_es_enabled, bool, 0444);
 static bool sev_snp_enabled = true;
 module_param_named(sev_snp, sev_snp_enabled, bool, 0444);
 
-static u64 sev_supported_vmsa_features;
-
 static unsigned int nr_ciphertext_hiding_asids;
 module_param_named(ciphertext_hiding_asids, nr_ciphertext_hiding_asids, uint, 0444);
 
@@ -81,6 +79,8 @@ module_param_named(ciphertext_hiding_asids, nr_ciphertext_hiding_asids, uint, 04
 
 static u64 snp_supported_policy_bits __ro_after_init;
 
+static u64 sev_supported_vmsa_features __ro_after_init;
+
 #define INITIAL_VMSA_GPA 0xFFFFFFFFF000
 
 static u8 sev_enc_bit;
-- 
2.52.0.457.g6b5491de43-goog