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Fri, 17 Jan 2025 16:34:38 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 31C4C2004B; Fri, 17 Jan 2025 16:34:38 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7782720040; Fri, 17 Jan 2025 16:34:37 +0000 (GMT) Received: from osiris (unknown [9.171.89.28]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTPS; Fri, 17 Jan 2025 16:34:37 +0000 (GMT) Date: Fri, 17 Jan 2025 17:34:36 +0100 From: Steffen Eiden To: Claudio Imbrenda Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, frankja@linux.ibm.com, borntraeger@de.ibm.com, schlameuss@linux.ibm.com, david@redhat.com, willy@infradead.org, hca@linux.ibm.com, svens@linux.ibm.com, agordeev@linux.ibm.com, gor@linux.ibm.com, nrb@linux.ibm.com, nsg@linux.ibm.com, seanjc@google.com Subject: Re: [PATCH v2 15/15] KVM: s390: remove the last user of page->index Message-ID: <20250117163436.79512-B-seiden@linux.ibm.com> References: <20250116113355.32184-1-imbrenda@linux.ibm.com> <20250116113355.32184-16-imbrenda@linux.ibm.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250116113355.32184-16-imbrenda@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: CED2Ca-002Pf86TIyI1zYjbkjRc3oEGo X-Proofpoint-ORIG-GUID: oPm8V5MXKdOdxWA0G_SteeVunTqUGo6V X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-01-17_06,2025-01-16_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 suspectscore=0 priorityscore=1501 malwarescore=0 lowpriorityscore=0 adultscore=0 phishscore=0 impostorscore=0 mlxscore=0 mlxlogscore=863 bulkscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2501170130 On Thu, Jan 16, 2025 at 12:33:55PM +0100, Claudio Imbrenda wrote: > Shadow page tables use page->index to keep the g2 address of the guest > page table being shadowed. > > Instead of keeping the information in page->index, split the address > and smear it over the 16-bit softbits areas of 4 PGSTEs. > > This removes the last s390 user of page->index. > > Signed-off-by: Claudio Imbrenda Reviewed-by: Steffen Eiden