From: David Hildenbrand <david@redhat.com>
To: Janosch Frank <frankja@linux.ibm.com>, qemu-devel@nongnu.org
Cc: thuth@redhat.com, pmorel@linux.ibm.com, cohuck@redhat.com,
borntraeger@de.ibm.com, qemu-s390x@nongnu.org,
mihajlov@linux.ibm.com
Subject: Re: [PATCH v2 12/13] s390x: protvirt: Disable address checks for PV guest IO emulation
Date: Fri, 29 Nov 2019 12:42:31 +0100 [thread overview]
Message-ID: <dca12928-99dd-49a5-5ea3-afa48caaf760@redhat.com> (raw)
In-Reply-To: <20191129094809.26684-13-frankja@linux.ibm.com>
On 29.11.19 10:48, Janosch Frank wrote:
> IO instruction data is routed through SIDAD for protected guests, so
> adresses do not need to be checked, as this is kernel memory.
"do not need" - is it actually evil to check? I would have assumed the
kernel checks and these checks are just superfluous but not dangerous?
IOW, some overhead we can ignore for now easily.
Same comment regarding doing the SIDAD access differently ...
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2019-11-29 12:06 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-29 9:47 [PATCH v2 00/13] s390x: Protected Virtualization support Janosch Frank
2019-11-29 9:47 ` [PATCH v2 01/13] s390x: protvirt: Add diag308 subcodes 8 - 10 Janosch Frank
2019-11-29 10:09 ` David Hildenbrand
2019-11-29 11:18 ` Janosch Frank
2019-11-29 11:41 ` Cornelia Huck
2019-11-29 12:40 ` Thomas Huth
2019-11-29 14:08 ` Janosch Frank
2019-12-02 9:20 ` Cornelia Huck
2019-11-29 9:47 ` [PATCH v2 02/13] Header sync protvirt Janosch Frank
2019-11-29 9:47 ` [PATCH v2 03/13] s390x: protvirt: Support unpack facility Janosch Frank
2019-11-29 10:19 ` David Hildenbrand
2019-12-04 10:48 ` Thomas Huth
2019-12-04 11:32 ` Janosch Frank
2019-12-04 11:34 ` Thomas Huth
2019-12-04 11:46 ` Janosch Frank
2019-11-29 9:48 ` [PATCH v2 04/13] s390x: protvirt: Handle diag 308 subcodes 0,1,3,4 Janosch Frank
2019-11-29 10:23 ` David Hildenbrand
2019-11-29 9:48 ` [PATCH v2 05/13] s390x: protvirt: Add pv state to cpu env Janosch Frank
2019-11-29 10:30 ` David Hildenbrand
2019-11-29 11:22 ` Janosch Frank
2019-12-06 9:50 ` Janosch Frank
2019-12-06 9:56 ` David Hildenbrand
2019-11-29 9:48 ` [PATCH v2 06/13] s390x: protvirt: KVM intercept changes Janosch Frank
2019-11-29 10:34 ` David Hildenbrand
2019-12-05 17:15 ` Cornelia Huck
2019-12-05 17:34 ` Janosch Frank
2019-12-05 17:46 ` Cornelia Huck
2019-12-06 7:44 ` Janosch Frank
2019-12-06 8:29 ` Cornelia Huck
2019-12-06 8:45 ` Janosch Frank
2019-12-06 9:08 ` Cornelia Huck
2019-12-06 9:30 ` Janosch Frank
2019-11-29 9:48 ` [PATCH v2 07/13] s390x: protvirt: SCLP interpretation Janosch Frank
2019-11-29 10:43 ` David Hildenbrand
2019-11-29 11:15 ` Janosch Frank
2019-11-29 11:27 ` David Hildenbrand
2019-11-29 9:48 ` [PATCH v2 08/13] s390x: protvirt: Add new VCPU reset functions Janosch Frank
2019-11-29 10:47 ` David Hildenbrand
2019-11-29 11:21 ` Janosch Frank
2019-11-29 11:24 ` David Hildenbrand
2019-12-04 11:58 ` Thomas Huth
2019-12-04 12:44 ` Janosch Frank
2019-11-29 9:48 ` [PATCH v2 09/13] s390x: Exit on vcpu reset error Janosch Frank
2019-11-29 9:48 ` [PATCH v2 10/13] s390x: protvirt: Set guest IPL PSW Janosch Frank
2019-11-29 11:30 ` David Hildenbrand
2019-11-29 11:47 ` David Hildenbrand
2019-11-29 9:48 ` [PATCH v2 11/13] s390x: protvirt: Move diag 308 data over SIDAD Janosch Frank
2019-11-29 11:34 ` David Hildenbrand
2019-11-29 9:48 ` [PATCH v2 12/13] s390x: protvirt: Disable address checks for PV guest IO emulation Janosch Frank
2019-11-29 11:42 ` David Hildenbrand [this message]
2019-12-04 12:16 ` Thomas Huth
2019-12-05 17:44 ` Cornelia Huck
2019-11-29 9:48 ` [PATCH v2 13/13] s390x: protvirt: Handle SIGP store status correctly Janosch Frank
2019-11-29 11:04 ` Thomas Huth
2019-11-29 11:08 ` David Hildenbrand
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=dca12928-99dd-49a5-5ea3-afa48caaf760@redhat.com \
--to=david@redhat.com \
--cc=borntraeger@de.ibm.com \
--cc=cohuck@redhat.com \
--cc=frankja@linux.ibm.com \
--cc=mihajlov@linux.ibm.com \
--cc=pmorel@linux.ibm.com \
--cc=qemu-devel@nongnu.org \
--cc=qemu-s390x@nongnu.org \
--cc=thuth@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.