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Tue, 2 Mar 2021 20:48:31 +0000 (GMT) From: Dov Murik To: qemu-devel@nongnu.org Subject: [RFC PATCH 14/26] migration: Introduce gpa_inside_migration_helper_shared_area Date: Tue, 2 Mar 2021 15:48:10 -0500 Message-Id: <20210302204822.81901-15-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 lowpriorityscore=0 mlxlogscore=999 clxscore=1015 suspectscore=0 impostorscore=0 malwarescore=0 adultscore=0 bulkscore=0 spamscore=0 priorityscore=1501 phishscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103020156 Received-SPF: none client-ip=148.163.156.1; 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_H2=-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 , Brijesh Singh , Juan Quintela , James Bottomley , Jon Grimm , Tobin Feldman-Fitzthum , Dov Murik , "Dr. David Alan Gilbert" , Hubertus Franke , Tobin Feldman-Fitzthum 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 fe317ee74b..0b821af774 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) {