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Commit 20f36e03 authored by Boris Ostrovsky's avatar Boris Ostrovsky Committed by David Vrabel
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xen/x86/pvh: Use HVM's flush_tlb_others op 



Using MMUEXT_TLB_FLUSH_MULTI doesn't buy us much since the hypervisor
will likely perform same IPIs as would have the guest.

More importantly, using MMUEXT_INVLPG_MULTI may not to invalidate the
guest's address on remote CPU (when, for example, VCPU from another guest
is running there).

Signed-off-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
Suggested-by: default avatarJan Beulich <jbeulich@suse.com>
Signed-off-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
parent de0afc9b

arch/x86/xen/mmu.c

+2 −7
Original line number Original line Diff line number Diff line
@@ -2495,14 +2495,9 @@ void __init xen_init_mmu_ops(void) 
{

{

	x86_init.paging.pagetable_init = xen_pagetable_init;

	x86_init.paging.pagetable_init = xen_pagetable_init;





	/* Optimization - we can use the HVM one but it has no idea which

	if (xen_feature(XENFEAT_auto_translated_physmap))

	 * VCPUs are descheduled - which means that it will needlessly IPI

	 * them. Xen knows so let it do the job.

	 */

	if (xen_feature(XENFEAT_auto_translated_physmap)) {

		pv_mmu_ops.flush_tlb_others = xen_flush_tlb_others;

		return;

		return;

	}



	pv_mmu_ops = xen_mmu_ops;

	pv_mmu_ops = xen_mmu_ops;





	memset(dummy_mapping, 0xff, PAGE_SIZE);

	memset(dummy_mapping, 0xff, PAGE_SIZE);