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Subject: [PATCH] pnv_lpc: disable reentrancy detection for lpc-hc Date: Thu, 11 May 2023 04:53:37 -0400 Message-Id: <20230511085337.3688527-1-alxndr@bu.edu> X-Mailer: git-send-email 2.39.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CES-GSUITE_AUTH: bf3aNvsZpxl8 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=216.71.137.63; envelope-from=alxndr@bu.edu; helo=esa5.hc2706-39.iphmx.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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 @bu.edu) X-ZM-MESSAGEID: 1683795288223100001 Content-Type: text/plain; charset="utf-8" As lpc-hc is designed for re-entrant calls from xscom, mark it re-entrancy safe. Reported-by: Thomas Huth Signed-off-by: Alexander Bulekov --- hw/ppc/pnv_lpc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/ppc/pnv_lpc.c b/hw/ppc/pnv_lpc.c index 01f44c19eb..67fd049a7f 100644 --- a/hw/ppc/pnv_lpc.c +++ b/hw/ppc/pnv_lpc.c @@ -738,6 +738,8 @@ static void pnv_lpc_realize(DeviceState *dev, Error **e= rrp) &lpc->opb_master_regs); memory_region_init_io(&lpc->lpc_hc_regs, OBJECT(dev), &lpc_hc_ops, lpc, "lpc-hc", LPC_HC_REGS_OPB_SIZE); + /* xscom writes to lpc-hc. As such mark lpc-hc re-entrancy safe */ + lpc->lpc_hc_regs.disable_reentrancy_guard =3D true; memory_region_add_subregion(&lpc->opb_mr, LPC_HC_REGS_OPB_ADDR, &lpc->lpc_hc_regs); =20 --=20 2.39.0