Commit d47aacdb authored by Cédric Le Goater's avatar Cédric Le Goater Committed by Paul Mackerras
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KVM: PPC: Book3S HV: XIVE: Clear file mapping when device is released 



Improve the release of the XIVE KVM device by clearing the file
address_space, which is used to unmap the interrupt ESB pages when a
device is passed-through.

Suggested-by: default avatarPaul Mackerras <paulus@ozlabs.org>
Signed-off-by: default avatarCédric Le Goater <clg@kaod.org>
Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
parent 5a3f4936

arch/powerpc/kvm/book3s_xive_native.c

+8 −0
Original line number Diff line number Diff line
@@ -976,6 +976,14 @@ static void kvmppc_xive_native_release(struct kvm_device *dev) 


	pr_devel("Releasing xive native device\n");



	/*

	 * Clear the KVM device file address_space which is used to

	 * unmap the ESB pages when a device is passed-through.

	 */

	mutex_lock(&xive->mapping_lock);

	xive->mapping = NULL;

	mutex_unlock(&xive->mapping_lock);



	/*

	 * Since this is the device release function, we know that

	 * userspace does not have any open fd or mmap referring to

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