From: Thomas Huth <thuth@redhat.com>
To: David Hildenbrand <david@redhat.com>, qemu-devel@nongnu.org
Cc: "Jason J . Herne" <jjherne@linux.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
Cornelia Huck <cohuck@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
Halil Pasic <pasic@linux.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
qemu-s390x@nongnu.org, Claudio Imbrenda <imbrenda@linux.ibm.com>
Subject: Re: [PATCH v1 02/12] s390x/tcg: fix ignoring bit 63 when setting the storage key in SSKE
Date: Fri, 6 Aug 2021 08:25:25 +0200 [thread overview]
Message-ID: <c9cf9879-8a09-5d23-a3b2-50a534acafbf@redhat.com> (raw)
In-Reply-To: <1aa00053-4923-423e-5a7d-d81b203d3eb2@redhat.com>
On 06/08/2021 08.19, Thomas Huth wrote:
> On 05/08/2021 17.27, David Hildenbrand wrote:
>> The last bit has to be ignored.
>>
>> Signed-off-by: David Hildenbrand <david@redhat.com>
>> ---
>> target/s390x/tcg/mem_helper.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/target/s390x/tcg/mem_helper.c b/target/s390x/tcg/mem_helper.c
>> index e0befd0f03..3c0820dd74 100644
>> --- a/target/s390x/tcg/mem_helper.c
>> +++ b/target/s390x/tcg/mem_helper.c
>> @@ -2210,7 +2210,7 @@ void HELPER(sske)(CPUS390XState *env, uint64_t r1,
>> uint64_t r2)
>> skeyclass = S390_SKEYS_GET_CLASS(ss);
>> }
>> - key = (uint8_t) r1;
>> + key = r1 & 0xfe;
>
> I'm not sure about this one ... could you cite a sentence in the PoP where
> this is declared? For me it rather sounds like SSKE always sets the whole
> storage key...
Ah, never mind, I missed that the rightmost bit is undefined and thus this
is likely ok. Did you check this on a real CPU, though?
Thomas
next prev parent reply other threads:[~2021-08-06 6:26 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-05 15:27 [PATCH v1 00/12] s390x: skey related fixes, cleanups, and memory device preparations David Hildenbrand
2021-08-05 15:27 ` [PATCH v1 01/12] s390x/tcg: wrap address for RRBE David Hildenbrand
2021-08-06 5:39 ` Thomas Huth
2021-08-05 15:27 ` [PATCH v1 02/12] s390x/tcg: fix ignoring bit 63 when setting the storage key in SSKE David Hildenbrand
2021-08-06 6:19 ` Thomas Huth
2021-08-06 6:25 ` Thomas Huth [this message]
2021-08-06 6:31 ` David Hildenbrand
2021-08-05 15:27 ` [PATCH v1 03/12] s390x/tcg: convert real to absolute address for RRBE, SSKE and ISKE David Hildenbrand
2021-08-06 6:50 ` Thomas Huth
2021-08-06 6:52 ` David Hildenbrand
2021-08-06 7:11 ` Thomas Huth
2021-08-06 7:17 ` David Hildenbrand
2021-08-06 11:25 ` Cornelia Huck
2021-08-06 11:32 ` David Hildenbrand
2021-08-05 15:27 ` [PATCH v1 04/12] s390x/tcg: check for addressing exceptions for " David Hildenbrand
2021-08-05 17:33 ` David Hildenbrand
2021-08-05 15:27 ` [PATCH v1 05/12] s390x/mmu_helper: no need to pass access type to mmu_translate_asce() David Hildenbrand
2021-08-06 7:30 ` Thomas Huth
2021-08-06 7:34 ` David Hildenbrand
2021-08-06 7:36 ` Thomas Huth
2021-08-06 7:36 ` David Hildenbrand
2021-08-05 15:27 ` [PATCH v1 06/12] s390x/mmu_helper: fixup mmu_translate() documentation David Hildenbrand
2021-08-06 7:32 ` Thomas Huth
2021-08-05 15:27 ` [PATCH v1 07/12] s390x/mmu_helper: move address validation into mmu_translate*() David Hildenbrand
2021-08-06 8:18 ` Thomas Huth
2021-08-06 8:20 ` David Hildenbrand
2021-08-06 8:22 ` Thomas Huth
2021-08-06 8:23 ` David Hildenbrand
2021-08-06 8:24 ` Thomas Huth
2021-08-06 8:20 ` Thomas Huth
2021-08-05 15:28 ` [PATCH v1 08/12] s390x/mmu_helper: avoid setting the storage key if nothing changed David Hildenbrand
2021-08-06 8:24 ` Thomas Huth
2021-08-05 15:28 ` [PATCH v1 09/12] hw/s390x/s390-skeys: use memory mapping to detect which storage keys to migrate David Hildenbrand
2021-08-06 8:47 ` Thomas Huth
2021-08-05 15:28 ` [PATCH v1 10/12] hw/s390x/s390-skeys: use memory mapping to detect which storage keys to dump David Hildenbrand
2021-08-06 8:51 ` Thomas Huth
2021-08-05 15:28 ` [PATCH v1 11/12] hw/s390x/s390-skeys: check if an address is valid before dumping the key David Hildenbrand
2021-08-06 8:53 ` Thomas Huth
2021-08-06 8:54 ` David Hildenbrand
2021-08-05 15:28 ` [PATCH v1 12/12] hw/s390x/s390-skeys: lazy storage key enablement under TCG David Hildenbrand
2021-08-06 9:42 ` Thomas Huth
2021-08-06 13:18 ` David Hildenbrand
2021-08-06 13:52 ` Thomas Huth
2021-08-11 8:43 ` David Hildenbrand
2021-08-06 14:13 ` Cornelia Huck
2021-08-06 14:17 ` Thomas Huth
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=c9cf9879-8a09-5d23-a3b2-50a534acafbf@redhat.com \
--to=thuth@redhat.com \
--cc=borntraeger@de.ibm.com \
--cc=cohuck@redhat.com \
--cc=david@redhat.com \
--cc=frankja@linux.ibm.com \
--cc=imbrenda@linux.ibm.com \
--cc=jjherne@linux.ibm.com \
--cc=pasic@linux.ibm.com \
--cc=qemu-devel@nongnu.org \
--cc=qemu-s390x@nongnu.org \
--cc=richard.henderson@linaro.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).