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Date: Mon, 14 Dec 2015 09:05:34 -0500 From: Boris Ostrovsky <boris.ostrovsky@...cle.com> To: David Vrabel <david.vrabel@...rix.com>, konrad.wilk@...cle.com Cc: xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org, jbeulich@...e.com Subject: Re: [Xen-devel] [PATCH] xen/x86/pvh: Use HVM's flush_tlb_others op On 12/14/2015 08:58 AM, David Vrabel wrote: > On 13/12/15 00:25, Boris Ostrovsky wrote: >> 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@...cle.com> >> Suggested-by: Jan Beulich <jbeulich@...e.com> >> Cc: stable@...r.kernel.org # 3.14+ > Applied to for-linus-4.4, thanks. But given that PVH is experimental > I've dropped the stable Cc. The reason I want this to go to stable is that I will be removing access to MMUEXT_TLB_FLUSH_MULTI and MMUEXT_INVLPG_MULTI to PVH guests in the hypervisor (as part of merging HVM and PVH hypercall tables) and that will result in essentially unbootable PVH guests due to warnings flood. -boris -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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