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Tue, 2 Mar 2021 20:48:28 +0000 (GMT) From: Dov Murik To: qemu-devel@nongnu.org Subject: [RFC PATCH 01/26] linux-headers: Add definitions of KVM page encryption bitmap ioctls Date: Tue, 2 Mar 2021 15:47:57 -0500 Message-Id: <20210302204822.81901-2-dovmurik@linux.vnet.ibm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210302204822.81901-1-dovmurik@linux.vnet.ibm.com> References: <20210302204822.81901-1-dovmurik@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761 definitions=2021-03-02_08:2021-03-01, 2021-03-02 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 mlxlogscore=999 clxscore=1015 mlxscore=0 bulkscore=0 impostorscore=0 lowpriorityscore=0 spamscore=0 suspectscore=0 adultscore=0 priorityscore=1501 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103020156 Received-SPF: none client-ip=148.163.158.5; envelope-from=dovmurik@linux.vnet.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Tom Lendacky , Ashish Kalra , Cornelia Huck , Brijesh Singh , "open list:Overall KVM CPUs" , "Michael S. Tsirkin" , James Bottomley , Jon Grimm , Tobin Feldman-Fitzthum , Dov Murik , Hubertus Franke , Tobin Feldman-Fitzthum , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add support for two ioctls KVM_GET_PAGE_ENC_BITMAP and KVM_SET_PAGE_ENC_BITMAP used to record the encryption state of each guest page. This patch will be replaced by a new implementation based on shared regions list, or by user-space handling of the regions list. However, these changes do not affect the use of the page encryption indication in confidential guest migration flow. Signed-off-by: Dov Murik --- linux-headers/linux/kvm.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h index 020b62a619..836c3776c0 100644 --- a/linux-headers/linux/kvm.h +++ b/linux-headers/linux/kvm.h @@ -532,6 +532,16 @@ struct kvm_dirty_log { }; }; +/* for KVM_GET_PAGE_ENC_BITMAP */ +struct kvm_page_enc_bitmap { + __u64 start_gfn; + __u64 num_pages; + union { + void *enc_bitmap; /* one bit per page */ + __u64 padding2; + }; +}; + /* for KVM_CLEAR_DIRTY_LOG */ struct kvm_clear_dirty_log { __u32 slot; @@ -1557,6 +1567,9 @@ struct kvm_pv_cmd { /* Available with KVM_CAP_S390_PROTECTED */ #define KVM_S390_PV_COMMAND _IOWR(KVMIO, 0xc5, struct kvm_pv_cmd) +#define KVM_GET_PAGE_ENC_BITMAP _IOW(KVMIO, 0xc6, struct kvm_page_enc_bitmap) +#define KVM_SET_PAGE_ENC_BITMAP _IOW(KVMIO, 0xc7, struct kvm_page_enc_bitmap) + /* Available with KVM_CAP_X86_MSR_FILTER */ #define KVM_X86_SET_MSR_FILTER _IOW(KVMIO, 0xc6, struct kvm_msr_filter)