linux-kernel - [PATCH v2 3/3] KVM: X86: Fixup kvm_apic_match_dest() dest

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20191129163234.18902-4-peterx@redhat.com>
Date:   Fri, 29 Nov 2019 11:32:34 -0500
From:   Peter Xu <peterx@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     Nitesh Narayan Lal <nitesh@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        peterx@...hat.com, Vitaly Kuznetsov <vkuznets@...hat.com>
Subject: [PATCH v2 3/3] KVM: X86: Fixup kvm_apic_match_dest() dest_mode parameter

The problem is the same as the previous patch on that we've got too
many ways to define a dest_mode, but logically we should only pass in
APIC_DEST_* macros for this helper.

To make it easier, simply define dest_mode of kvm_apic_match_dest() to
be a boolean to make it right while we can avoid to touch the callers.

Signed-off-by: Peter Xu <peterx@...hat.com>
---
 arch/x86/kvm/lapic.c | 5 +++--
 arch/x86/kvm/lapic.h | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index cf9177b4a07f..80732892c709 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -791,8 +791,9 @@ static u32 kvm_apic_mda(struct kvm_vcpu *vcpu, unsigned int dest_id,
 	return dest_id;
 }
 
+/* Set dest_mode to true for logical mode, false for physical mode */
 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
-			   int short_hand, unsigned int dest, int dest_mode)
+			   int short_hand, unsigned int dest, bool dest_mode)
 {
 	struct kvm_lapic *target = vcpu->arch.apic;
 	u32 mda = kvm_apic_mda(vcpu, dest, source, target);
@@ -800,7 +801,7 @@ bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
 	ASSERT(target);
 	switch (short_hand) {
 	case APIC_DEST_NOSHORT:
-		if (dest_mode == APIC_DEST_PHYSICAL)
+		if (dest_mode == false)
 			return kvm_apic_match_physical_addr(target, mda);
 		else
 			return kvm_apic_match_logical_addr(target, mda);
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index 19b36196e2ff..c0b472ed87ad 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -82,7 +82,7 @@ int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val);
 int kvm_lapic_reg_read(struct kvm_lapic *apic, u32 offset, int len,
 		       void *data);
 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
-			   int short_hand, unsigned int dest, int dest_mode);
+			   int short_hand, unsigned int dest, bool dest_mode);
 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
 int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
 			     struct kvm_lapic_irq *irq,
-- 
2.21.0