linux-kernel - [PATCH] KVM: SVM: Fix a misplaced paranthesis in APICV inhibit mask generation

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Date:   Fri, 10 Jun 2022 19:18:13 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     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>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Maxim Levitsky <mlevitsk@...hat.com>
Subject: [PATCH] KVM: SVM: Fix a misplaced paranthesis in APICV inhibit mask generation

Relocate a ")" to its proper place at the end of a BIT usage, the intent
is most definitely not to have a feedback loop of BITs in the mask.

arch/x86/kvm/svm/avic.c: In function ‘avic_check_apicv_inhibit_reasons’:
include/vdso/bits.h:7:40: error: left shift count >= width of type [-Werror=shift-count-overflow]
    7 | #define BIT(nr)                 (UL(1) << (nr))
      |                                        ^~
arch/x86/kvm/svm/avic.c:911:27: note: in expansion of macro ‘BIT’
  911 |                           BIT(APICV_INHIBIT_REASON_SEV      |
      |                           ^~~

Fixes: 3743c2f02517 ("KVM: x86: inhibit APICv/AVIC on changes to APIC ID or APIC base")
Cc: Maxim Levitsky <mlevitsk@...hat.com>
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 arch/x86/kvm/svm/avic.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c
index 5542d8959e11..d1bc5820ea46 100644
--- a/arch/x86/kvm/svm/avic.c
+++ b/arch/x86/kvm/svm/avic.c
@@ -908,9 +908,9 @@ bool avic_check_apicv_inhibit_reasons(enum kvm_apicv_inhibit reason)
 			  BIT(APICV_INHIBIT_REASON_PIT_REINJ) |
 			  BIT(APICV_INHIBIT_REASON_X2APIC) |
 			  BIT(APICV_INHIBIT_REASON_BLOCKIRQ) |
-			  BIT(APICV_INHIBIT_REASON_SEV      |
+			  BIT(APICV_INHIBIT_REASON_SEV)      |
 			  BIT(APICV_INHIBIT_REASON_APIC_ID_MODIFIED) |
-			  BIT(APICV_INHIBIT_REASON_APIC_BASE_MODIFIED));
+			  BIT(APICV_INHIBIT_REASON_APIC_BASE_MODIFIED);
 
 	return supported & BIT(reason);
 }

base-commit: b23f8810c46978bc05252db03055a61fcadc07d5
-- 
2.36.1.476.g0c4daa206d-goog