Patch "KVM: VMX: use cmpxchg64" has been added to the 4.4-stable tree

PATCH [email protected] 1 participant 1 message Oct 3, 2017

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Stable branch x86 KVM x86

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2017-10-03 11:35 UTC #0 lore raw

This is a note to let you know that I've just added the patch titled

KVM: VMX: use cmpxchg64

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
kvm-vmx-use-cmpxchg64.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From c0a1666bcb2a33e84187a15eabdcd54056be9a97 Mon Sep 17 00:00:00 2001

From: Paolo Bonzini <[email protected]>
Date: Thu, 28 Sep 2017 17:58:41 +0200
Subject: KVM: VMX: use cmpxchg64

From: Paolo Bonzini <[email protected]>

commit c0a1666bcb2a33e84187a15eabdcd54056be9a97 upstream.

This fixes a compilation failure on 32-bit systems.

Signed-off-by Paolo Bonzini <[email protected]>

Signed-off-by Greg Kroah-Hartman <[email protected]>

---
 arch/x86/kvm/vmx.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

arch/x86/kvm/vmx.c +6 -6

@@ -2029,8 +2029,8 @@ static void vmx_vcpu_pi_load(struct kvm_
 
 		/* Allow posting non-urgent interrupts */
 		new.sn = 0;
-	} while (cmpxchg(&pi_desc->control, old.control,
-			new.control) != old.control);
+	} while (cmpxchg64(&pi_desc->control, old.control,
+			   new.control) != old.control);
 }
 /*
  * Switches to specified vcpu, until a matching vcpu_put(), but assumes

@@ -10705,8 +10705,8 @@ static int vmx_pre_block(struct kvm_vcpu
 
 		/* set 'NV' to 'wakeup vector' */
 		new.nv = POSTED_INTR_WAKEUP_VECTOR;
-	} while (cmpxchg(&pi_desc->control, old.control,
-			new.control) != old.control);
+	} while (cmpxchg64(&pi_desc->control, old.control,
+			   new.control) != old.control);
 
 	return 0;
 }

@@ -10737,8 +10737,8 @@ static void vmx_post_block(struct kvm_vc
 
 		/* set 'NV' to 'notification vector' */
 		new.nv = POSTED_INTR_VECTOR;
-	} while (cmpxchg(&pi_desc->control, old.control,
-			new.control) != old.control);
+	} while (cmpxchg64(&pi_desc->control, old.control,
+			   new.control) != old.control);
 
 	if(vcpu->pre_pcpu != -1) {
 		spin_lock_irqsave(

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/kvm-vmx-do-not-change-sn-bit-in-vmx_update_pi_irte.patch queue-4.4/kvm-vmx-use-cmpxchg64.patch queue-4.4/kvm-nvmx-don-t-allow-l2-to-access-the-hardware-cr8.patch queue-4.4/kvm-vmx-do-not-bug-on-out-of-bounds-guest-irq.patch queue-4.4/kvm-vmx-remove-warn_on_once-in-kvm_vcpu_trigger_posted_interrupt.patch