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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 10 Sep 2019 09:30:04 +0100 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x8A8Tcvs37159320 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 10 Sep 2019 08:29:38 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9F35B52057; Tue, 10 Sep 2019 08:30:02 +0000 (GMT) Received: from bharata.ibmuc.com (unknown [9.199.35.217]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 6FBC652054; Tue, 10 Sep 2019 08:30:00 +0000 (GMT) From: Bharata B Rao To: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org, linux-mm@kvack.org, paulus@au1.ibm.com, aneesh.kumar@linux.vnet.ibm.com, jglisse@redhat.com, linuxram@us.ibm.com, sukadev@linux.vnet.ibm.com, cclaudio@linux.ibm.com, hch@lst.de, Bharata B Rao , Paul Mackerras Subject: [PATCH v8 5/8] kvmppc: Handle memory plug/unplug to secure VM Date: Tue, 10 Sep 2019 13:59:43 +0530 X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190910082946.7849-1-bharata@linux.ibm.com> References: <20190910082946.7849-1-bharata@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19091008-0008-0000-0000-00000313C59E X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19091008-0009-0000-0000-00004A322C05 Message-Id: <20190910082946.7849-6-bharata@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-09-10_06:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=799 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1909100085 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Register the new memslot with UV during plug and unregister the memslot during unplug. Signed-off-by: Bharata B Rao Acked-by: Paul Mackerras --- arch/powerpc/include/asm/ultravisor-api.h | 1 + arch/powerpc/include/asm/ultravisor.h | 5 +++++ arch/powerpc/kvm/book3s_hv.c | 21 +++++++++++++++++++++ 3 files changed, 27 insertions(+) diff --git a/arch/powerpc/include/asm/ultravisor-api.h b/arch/powerpc/inc= lude/asm/ultravisor-api.h index c578d9b13a56..46b1ee381695 100644 --- a/arch/powerpc/include/asm/ultravisor-api.h +++ b/arch/powerpc/include/asm/ultravisor-api.h @@ -26,6 +26,7 @@ #define UV_WRITE_PATE 0xF104 #define UV_RETURN 0xF11C #define UV_REGISTER_MEM_SLOT 0xF120 +#define UV_UNREGISTER_MEM_SLOT 0xF124 #define UV_PAGE_IN 0xF128 #define UV_PAGE_OUT 0xF12C =20 diff --git a/arch/powerpc/include/asm/ultravisor.h b/arch/powerpc/include= /asm/ultravisor.h index 58ccf5e2d6bb..719c0c3930b9 100644 --- a/arch/powerpc/include/asm/ultravisor.h +++ b/arch/powerpc/include/asm/ultravisor.h @@ -52,4 +52,9 @@ static inline int uv_register_mem_slot(u64 lpid, u64 st= art_gpa, u64 size, size, flags, slotid); } =20 +static inline int uv_unregister_mem_slot(u64 lpid, u64 slotid) +{ + return ucall_norets(UV_UNREGISTER_MEM_SLOT, lpid, slotid); +} + #endif /* _ASM_POWERPC_ULTRAVISOR_H */ diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 2527f1676b59..fc93e5ba5683 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -74,6 +74,7 @@ #include #include #include +#include =20 #include "book3s.h" =20 @@ -4517,6 +4518,26 @@ static void kvmppc_core_commit_memory_region_hv(st= ruct kvm *kvm, if (change =3D=3D KVM_MR_FLAGS_ONLY && kvm_is_radix(kvm) && ((new->flags ^ old->flags) & KVM_MEM_LOG_DIRTY_PAGES)) kvmppc_radix_flush_memslot(kvm, old); + /* + * If UV hasn't yet called H_SVM_INIT_START, don't register memslots. + */ + if (!kvm->arch.secure_guest) + return; + + switch (change) { + case KVM_MR_CREATE: + uv_register_mem_slot(kvm->arch.lpid, + new->base_gfn << PAGE_SHIFT, + new->npages * PAGE_SIZE, + 0, new->id); + break; + case KVM_MR_DELETE: + uv_unregister_mem_slot(kvm->arch.lpid, old->id); + break; + default: + /* TODO: Handle KVM_MR_MOVE */ + break; + } } =20 /* --=20 2.21.0