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b=Ii2tTRiwgE8mt5rqjKLKmC6aT62xZpp/7/Wa9Ezv7m2xtZWPDMAlWsDdecU9JAvTi1KD Yeiz9GW+NkRLEzN5uRUssUWPq1HT70GmkFTvA9QOFDCWHTSFOeochmZc0jP1CsverysF Ff1jiimeh89XHwZ13aOPPEudLC+H9+1Ge1IXzZZ7g/sjni2W1wcxZ3/QhgPLCspa2N5a sy4VIhZ5I/PrRAXOvVD/4nePUaJ50dczQ8QuFqwIZeXghB9L5i4MU71U2iOvs6gw9Uzb 0ECaWezsrktc6lBzeC0fV/4Gkse4ceFEhM3vOjIrcO8yNRfQCW+CnTxiTW9r+lB+ER1V yQ== From: Harsh Prateek Bora To: npiggin@gmail.com, qemu-ppc@nongnu.org, qemu-devel@nongnu.org Cc: danielhb413@gmail.com, vaibhav@linux.ibm.com, sbhat@linux.ibm.com Subject: [PATCH v3 2/3] cpu-common.c: export cpu_get_free_index to be reused later Date: Thu, 23 May 2024 12:56:13 +0530 Message-Id: <20240523072614.256172-3-harshpb@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20240523072614.256172-1-harshpb@linux.ibm.com> References: <20240523072614.256172-1-harshpb@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: Ebpd97Z2WhbLbssW1b6qTgjAqlwLOrgO X-Proofpoint-GUID: CHA-0NvsxazuG7A0h7XEz23cQXP62JZP X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.12.28.16 definitions=2024-05-23_04,2024-05-22_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 bulkscore=0 clxscore=1015 impostorscore=0 spamscore=0 mlxscore=0 mlxlogscore=846 malwarescore=0 suspectscore=0 lowpriorityscore=0 priorityscore=1501 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2405010000 definitions=main-2405230048 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=148.163.156.1; envelope-from=harshpb@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1716449243764100001 Content-Type: text/plain; charset="utf-8" This helper provides an easy way to identify the next available free cpu index which can be used for vcpu creation. Until now, this is being called at a very later stage and there is a need to be able to call it earlier (for now, with ppc64) hence the need to export. Suggested-by: Nicholas Piggin Signed-off-by: Harsh Prateek Bora Reviewed-by: Nicholas Piggin --- include/exec/cpu-common.h | 2 ++ cpu-common.c | 7 ++++--- 2 files changed, 6 insertions(+), 3 deletions(-) diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 6d5318895a..0386f1ab29 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -29,6 +29,8 @@ void cpu_list_lock(void); void cpu_list_unlock(void); unsigned int cpu_list_generation_id_get(void); =20 +int cpu_get_free_index(void); + void tcg_iommu_init_notifier_list(CPUState *cpu); void tcg_iommu_free_notifier_list(CPUState *cpu); =20 diff --git a/cpu-common.c b/cpu-common.c index ce78273af5..82bd1b432d 100644 --- a/cpu-common.c +++ b/cpu-common.c @@ -57,14 +57,12 @@ void cpu_list_unlock(void) qemu_mutex_unlock(&qemu_cpu_list_lock); } =20 -static bool cpu_index_auto_assigned; =20 -static int cpu_get_free_index(void) +int cpu_get_free_index(void) { CPUState *some_cpu; int max_cpu_index =3D 0; =20 - cpu_index_auto_assigned =3D true; CPU_FOREACH(some_cpu) { if (some_cpu->cpu_index >=3D max_cpu_index) { max_cpu_index =3D some_cpu->cpu_index + 1; @@ -83,8 +81,11 @@ unsigned int cpu_list_generation_id_get(void) =20 void cpu_list_add(CPUState *cpu) { + static bool cpu_index_auto_assigned; + QEMU_LOCK_GUARD(&qemu_cpu_list_lock); if (cpu->cpu_index =3D=3D UNASSIGNED_CPU_INDEX) { + cpu_index_auto_assigned =3D true; cpu->cpu_index =3D cpu_get_free_index(); assert(cpu->cpu_index !=3D UNASSIGNED_CPU_INDEX); } else { --=20 2.39.3