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authorBoris Ostrovsky <boris.ostrovsky@oracle.com>2015-12-12 19:25:55 -0500
committerDavid Vrabel <david.vrabel@citrix.com>2015-12-14 13:53:40 +0000
commit20f36e0380a7e871a711d5e4e59d04d4948326b4 (patch)
tree47f0ec1fd0b2692c817bb3e2a8a4b8fc663b16b3
parentde0afc9bdeeadaa998797d2333c754bf9f4d5dcf (diff)
downloadop-kernel-dev-20f36e0380a7e871a711d5e4e59d04d4948326b4.zip
op-kernel-dev-20f36e0380a7e871a711d5e4e59d04d4948326b4.tar.gz
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: Boris Ostrovsky <boris.ostrovsky@oracle.com> Suggested-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
-rw-r--r--arch/x86/xen/mmu.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index ac161db..cb5e266 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -2495,14 +2495,9 @@ void __init xen_init_mmu_ops(void)
{
x86_init.paging.pagetable_init = xen_pagetable_init;
- /* Optimization - we can use the HVM one but it has no idea which
- * 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;
+ if (xen_feature(XENFEAT_auto_translated_physmap))
return;
- }
+
pv_mmu_ops = xen_mmu_ops;
memset(dummy_mapping, 0xff, PAGE_SIZE);
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