linux-kernel - [PATCH] KVM: Only display message about bios support disabled once

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Date:   Thu, 26 May 2022 16:30:38 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     <mario.limonciello@....com>, Paolo Bonzini <pbonzini@...hat.com>,
        "Sean Christopherson" <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        "Joerg Roedel" <joro@...tes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        "open list:KERNEL VIRTUAL MACHINE FOR X86 (KVM/x86)" 
        <kvm@...r.kernel.org>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] KVM: Only display message about bios support disabled once

On an OEM laptop I see the following message 10 times in my dmesg:
"kvm: support for 'kvm_amd' disabled by bios"

This might be useful the first time, but there really isn't a point
to showing the error 9 more times.  The BIOS still has it disabled.
Change the message to only display one time.

Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 arch/x86/kvm/x86.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 4790f0d7d40b..80a8ea13f09a 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8887,7 +8887,7 @@ int kvm_arch_init(void *opaque)
 		goto out;
 	}
 	if (ops->disabled_by_bios()) {
-		pr_err_ratelimited("kvm: support for '%s' disabled by bios\n",
+		pr_err_once("kvm: support for '%s' disabled by bios\n",
 				   ops->runtime_ops->name);
 		r = -EOPNOTSUPP;
 		goto out;
-- 
2.34.1