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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=139.138.37.100; envelope-from=yaoxt.fnst@fujitsu.com; helo=esa12.hc1455-7.c3s2.iphmx.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Yao Xingtao From: Yao Xingtao via Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1721352512822116600 Content-Type: text/plain; charset="utf-8" When injecting a new poisoned region through qmp_cxl_inject_poison(), the newly injected region should not overlap with existing poisoned regions. The current validation method does not consider the following overlapping region: +---+-------+---+ | a | b(a) | a | +---+-------+---+ (a is a newly added region, b is an existing region, and b is a subregion of a) Reviewed-by: Jonathan Cameron Suggested-by: Peter Maydell Signed-off-by: Yao Xingtao --- V1[1] -> V2: - Use ranges_overlap() to improve code readability - Replace the ASCII extended graph to ASCII basic in comment. [1] https://lore.kernel.org/qemu-devel/20240718090753.59163-1-yaoxt.fnst@fu= jitsu.com --- hw/mem/cxl_type3.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c index 35ac59883a5b..b2f3e2090b57 100644 --- a/hw/mem/cxl_type3.c +++ b/hw/mem/cxl_type3.c @@ -1331,9 +1331,7 @@ void qmp_cxl_inject_poison(const char *path, uint64_t= start, uint64_t length, ct3d =3D CXL_TYPE3(obj); =20 QLIST_FOREACH(p, &ct3d->poison_list, node) { - if (((start >=3D p->start) && (start < p->start + p->length)) || - ((start + length > p->start) && - (start + length <=3D p->start + p->length))) { + if (ranges_overlap(start, length, p->start, p->length)) { error_setg(errp, "Overlap with existing poisoned region not supporte= d"); return; --=20 2.37.3