[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [PATCH] x86/mm: avoid playing with directmap when self-snoop can be relied upon

  • To: Jan Beulich <jbeulich@xxxxxxxx>
  • From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
  • Date: Wed, 21 Oct 2020 17:23:21 +0200
  • Authentication-results: esa5.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none
  • Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "Andrew Cooper" <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
  • Delivery-date: Wed, 21 Oct 2020 15:32:14 +0000
  • Ironport-sdr: ZLxZ4n7eINdDjoDDUkyYUGTpWa6NUq0P9PdY1JhgxuqAeYDVHvflGBfwPVn9K/ElPLEZJAZO5c oYAga1AI0p04oy3Yin5yehLMb6H3TiwDNxQS6NuLm+4boi7Mm+ktJTdqObD12alE3Oa4WKH3UX YTjeKSucVkli9y90xGIrtgbvZRhdPn1ywbPWOrkEmeJjFeic3U/tevFZGh4J8KeXYwYodfwnFv FWfuFe+jeAfc/kLij4r8l3pY3TZDzrI9/XLJ1F6rtrd2MZsY3CSIimX0xjAabcGySqexXy+rtj vTo=
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On Tue, Oct 20, 2020 at 03:51:18PM +0200, Jan Beulich wrote:
> The set of systems affected by XSA-345 would have been smaller is we had
> this in place already: When the processor is capable of dealing with
> mismatched cacheability, there's no extra work we need to carry out.
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

I guess it's not worth using the alternative framework to patch this
up at boot in order to avoid the call in the first place?

Thanks, Roger.



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.