From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 369253B52E1 for ; Fri, 22 May 2026 09:56:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779443806; cv=none; b=kaRqRmgoaFbVhEffP0RmALGSgBUGtG0sWN3N+1O7Cs+mS6vcgf4HE5+SdBaOTLGtqv/0BZLw22fca23mSKVKUwY0wlsE2Rb1lHd1OKFT8Bx4CZCTBH0Pvtu7lcp7RK61PdQ28u0T/Y3L5pnz9iNQwBr3trKcMADIw0byQwnHrlM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779443806; c=relaxed/simple; bh=Icgb4f+mxemIv2zrP3yaLp1RI/4pQz56H5O4k1XMi/M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HEFViOYQQvxkX4N84cXkE8wC8CjuZEhQ9uObcvlGGxDBXMt4c01czxSh6MhVxZ67nTAMOhpkrbPdL3/n9Ahqd747qgvolIjCCvUUV7A3Ly1YF2LAIQQwgxeUUwXuB6eLMutRuuOJwi89M+2d0JDATDgxjdzkGH0g65tk+fc7R1I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kj6lTiSv; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kj6lTiSv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 388591F000E9; Fri, 22 May 2026 09:56:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779443804; bh=PS+M11qxsK7pLF5VPFqgaibCX0XcuKhFH5IihJWdaY8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=kj6lTiSveeDGvsRklW3EJORl7IkNohMN97x6WztN4Clsn87Ehipo81jvybhsDOzii JMBw4YecyzlZ+5eeOW0AtHlBJymgoRl7gEQ4WW1Ut7H8wTJiqMCedC7HYrlrFr80OG WJ5ggfvNRexBNdqVtDH7oizi2CVnMZHnGKuSG9/Pado3gU6ANilOsxUUAAfUROXwOq UtqBgGaOvBTSKUP1Lq2QcgR0OtXTDKIfsrZbvvMrAfpQeX+CeZ6/xrMVvZYsKtEGxn 4l0Ya+tfQLYgpYi43rLHKuR5faiRbKiGAqLwxd7qX/xlQgbqtArN/n82PFgzyEXTmm 8JdR2tpy5giQw== From: "Christophe Leroy (CS GROUP)" To: Michael Ellerman , Nicholas Piggin , Madhavan Srinivasan Cc: "Christophe Leroy (CS GROUP)" , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v1 2/8] powerpc/signal64: Untangle setup_tm_sigcontexts() and user_access_begin() Date: Fri, 22 May 2026 11:56:02 +0200 Message-ID: <7c83fe5a596514a02fde37da987a48d638d0d097.1779441786.git.chleroy@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1675; i=chleroy@kernel.org; h=from:subject:message-id; bh=Icgb4f+mxemIv2zrP3yaLp1RI/4pQz56H5O4k1XMi/M=; b=owGbwMvMwCV2d0KB2p7V54MZT6slMWQJaNi5LT5ezLDXTnb26dvLuiYsOuJuvDM0W3je6gOC3 zmnd0h97ShlYRDjYpAVU2Q5/p9714yuL6n5U3fpw8xhZQIZwsDFKQATsVFjZFgfrJPHW6hc/qhR Od334o7VRftkvIRa3fgCplVa6K7UVGVkeCvk9+7Xs+lSMvnixyU2HRT7mc5cbX3uaXVnl3We3M+ j/AA= X-Developer-Key: i=chleroy@kernel.org; a=openpgp; fpr=10FFE6F8B390DE17ACC2632368A92FEB01B8DD78 Content-Transfer-Encoding: 8bit Call setup_tm_sigcontexts() before opening user access to avoid having to close and open again. Signed-off-by: Christophe Leroy (CS GROUP) --- arch/powerpc/kernel/signal_64.c | 22 +++++++++------------- 1 file changed, 9 insertions(+), 13 deletions(-) diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c index 86bb5bb4c143..3849af21e1d8 100644 --- a/arch/powerpc/kernel/signal_64.c +++ b/arch/powerpc/kernel/signal_64.c @@ -873,6 +873,15 @@ int handle_rt_signal64(struct ksignal *ksig, sigset_t *set, if (!MSR_TM_ACTIVE(msr)) prepare_setup_sigcontext(tsk); +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM + if (MSR_TM_ACTIVE(msr)) + err |= setup_tm_sigcontexts(&frame->uc.uc_mcontext, + &frame->uc_transact.uc_mcontext, + tsk, ksig->sig, NULL, + (unsigned long)ksig->ka.sa.sa_handler, + msr); + +#endif if (!user_write_access_begin(frame, sizeof(*frame))) goto badframe; @@ -889,19 +898,6 @@ int handle_rt_signal64(struct ksignal *ksig, sigset_t *set, * ucontext_t (for transactional state) with its uc_link ptr. */ unsafe_put_user(&frame->uc_transact, &frame->uc.uc_link, badframe_block); - - user_write_access_end(); - - err |= setup_tm_sigcontexts(&frame->uc.uc_mcontext, - &frame->uc_transact.uc_mcontext, - tsk, ksig->sig, NULL, - (unsigned long)ksig->ka.sa.sa_handler, - msr); - - if (!user_write_access_begin(&frame->uc.uc_sigmask, - sizeof(frame->uc.uc_sigmask))) - goto badframe; - #endif } else { unsafe_put_user(0, &frame->uc.uc_link, badframe_block); -- 2.54.0