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Mon, 13 Jan 2025 13:47:13 +0000 (GMT) From: Ilya Leoshkevich To: =?utf-8?q?Alex_Benn=C3=A9e?= , Richard Henderson , =?utf-8?q?Philippe_Mathie?= =?utf-8?q?u-Daud=C3=A9?= Cc: qemu-devel@nongnu.org, Ilya Leoshkevich Subject: [PATCH 2/3] cpu: Introduce EXCLUSIVE_GUARD() Date: Mon, 13 Jan 2025 14:36:28 +0100 Message-ID: <20250113134658.68376-3-iii@linux.ibm.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250113134658.68376-1-iii@linux.ibm.com> References: <20250113134658.68376-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: saEeJyIzuOaagVJDjQOM0sqf_pi2xa7a X-Proofpoint-GUID: saEeJyIzuOaagVJDjQOM0sqf_pi2xa7a X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-15_01,2024-10-11_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 impostorscore=0 clxscore=1015 malwarescore=0 suspectscore=0 adultscore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 spamscore=0 mlxlogscore=999 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2501130114 Received-SPF: pass client-ip=148.163.158.5; envelope-from=iii@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 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=-1.787, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add a macro that produces a start_exclusive() / end_exclusive() pair. Useful to guarantee an exit from an exclusive section in large functions. Signed-off-by: Ilya Leoshkevich --- include/hw/core/cpu.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h index c3ca0babcb3..a7d9d6e2b8c 100644 --- a/include/hw/core/cpu.h +++ b/include/hw/core/cpu.h @@ -1063,6 +1063,17 @@ void start_exclusive(void); */ void end_exclusive(void); +static inline void exclusive_unlock_guard(int *exclusive_guard G_GNUC_UNUSED) +{ + end_exclusive(); +} + +#define EXCLUSIVE_GUARD() \ + int glue(exclusive_guard, __COUNTER__) \ + G_GNUC_UNUSED \ + __attribute__((cleanup(exclusive_unlock_guard))) = \ + (start_exclusive(), 0); + /** * qemu_init_vcpu: * @cpu: The vCPU to initialize.