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Mon, 23 Aug 2021 14:16:46 +0000 (GMT) From: Dov Murik To: qemu-devel@nongnu.org Subject: [RFC PATCH v2 03/12] migration: Introduce gpa_inside_migration_helper_shared_area Date: Mon, 23 Aug 2021 10:16:27 -0400 Message-Id: <20210823141636.65975-4-dovmurik@linux.ibm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210823141636.65975-1-dovmurik@linux.ibm.com> References: <20210823141636.65975-1-dovmurik@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 2Bv8RuuXr51BjuvFT3rLmzWGDpGkNg28 X-Proofpoint-ORIG-GUID: 6JNsZZH2OU5I9YZRA3d1lslV4kdGNFMy X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.790 definitions=2021-08-23_03:2021-08-23, 2021-08-23 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 clxscore=1015 lowpriorityscore=0 phishscore=0 malwarescore=0 mlxlogscore=999 mlxscore=0 impostorscore=0 priorityscore=1501 spamscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2108230098 Received-SPF: pass client-ip=148.163.158.5; envelope-from=dovmurik@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: 0 X-Spam_score: -0.1 X-Spam_bar: / X-Spam_report: (-0.1 / 5.0 requ) DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-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 , Brijesh Singh , "Michael S. Tsirkin" , Steve Rutherford , James Bottomley , Juan Quintela , "Dr. David Alan Gilbert" , Dov Murik , Hubertus Franke , Tobin Feldman-Fitzthum , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The gpa_inside_migration_helper_shared_area will be used to skip migrating RAM pages that are used by the migration helper at the target. Signed-off-by: Dov Murik --- migration/confidential-ram.h | 2 ++ migration/confidential-ram.c | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/migration/confidential-ram.h b/migration/confidential-ram.h index ebe4073bce..9a1027bdaf 100644 --- a/migration/confidential-ram.h +++ b/migration/confidential-ram.h @@ -8,6 +8,8 @@ #include "exec/cpu-common.h" #include "qemu-file.h" +bool gpa_inside_migration_helper_shared_area(ram_addr_t gpa); + void cgs_mh_init(void); void cgs_mh_cleanup(void); diff --git a/migration/confidential-ram.c b/migration/confidential-ram.c index 053ecea1d4..30002448b9 100644 --- a/migration/confidential-ram.c +++ b/migration/confidential-ram.c @@ -68,6 +68,12 @@ static CGSMigHelperState cmhs = {0}; #define MH_SHARED_CMD_PARAMS_ADDR 0x820000 #define MH_SHARED_IO_PAGE_HDR_ADDR (MH_SHARED_CMD_PARAMS_ADDR + 0x800) #define MH_SHARED_IO_PAGE_ADDR (MH_SHARED_CMD_PARAMS_ADDR + 0x1000) +#define MH_SHARED_LAST_BYTE (MH_SHARED_CMD_PARAMS_ADDR + 0x1fff) + +bool gpa_inside_migration_helper_shared_area(ram_addr_t gpa) +{ + return gpa >= MH_SHARED_CMD_PARAMS_ADDR && gpa <= MH_SHARED_LAST_BYTE; +} void cgs_mh_init(void) { -- 2.20.1