From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 48845168AD for ; Mon, 8 May 2023 10:17:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C39ADC433D2; Mon, 8 May 2023 10:17:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1683541035; bh=Xdq6WHE3RMmxZGTNIrc9fX9lJQcBS0AbCx8tF2rpevg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=h89kGaje1uTjUS85Y+DkzVZZPKSdkSOLPSWlc1FupXmlMP1MWKt01L5mgA3seSXUK 5HIj5vWcZLKgimZm0U6Qa5Hdtuqa7J3/AnEFdu+hLlgOlwuq2Z/jBt6QLITPzvUvtV wyl+s+nv84yWiS40hWvmk5OP5je+/4gTuUbbm7hE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Helge Deller Subject: [PATCH 6.1 560/611] parisc: Ensure page alignment in flush functions Date: Mon, 8 May 2023 11:46:42 +0200 Message-Id: <20230508094440.183580728@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230508094421.513073170@linuxfoundation.org> References: <20230508094421.513073170@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Helge Deller commit d755bd2caeb47fd806e12399fe8b56798fa5d2cc upstream. Matthew Wilcox noticed, that if ARCH_HAS_FLUSH_ON_KUNMAP is defined (which is the case for PA-RISC), __kunmap_local() calls kunmap_flush_on_unmap(), which may call the parisc flush functions with a non-page-aligned address and thus the page might not be fully flushed. This patch ensures that flush_kernel_dcache_page_asm() and flush_kernel_dcache_page_asm() will always operate on page-aligned addresses. Signed-off-by: Helge Deller Cc: # v6.0+ Signed-off-by: Greg Kroah-Hartman --- arch/parisc/kernel/pacache.S | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/parisc/kernel/pacache.S +++ b/arch/parisc/kernel/pacache.S @@ -889,6 +889,7 @@ ENDPROC_CFI(flush_icache_page_asm) ENTRY_CFI(flush_kernel_dcache_page_asm) 88: ldil L%dcache_stride, %r1 ldw R%dcache_stride(%r1), %r23 + depi_safe 0, 31,PAGE_SHIFT, %r26 /* Clear any offset bits */ #ifdef CONFIG_64BIT depdi,z 1, 63-PAGE_SHIFT,1, %r25 @@ -925,6 +926,7 @@ ENDPROC_CFI(flush_kernel_dcache_page_asm ENTRY_CFI(purge_kernel_dcache_page_asm) 88: ldil L%dcache_stride, %r1 ldw R%dcache_stride(%r1), %r23 + depi_safe 0, 31,PAGE_SHIFT, %r26 /* Clear any offset bits */ #ifdef CONFIG_64BIT depdi,z 1, 63-PAGE_SHIFT,1, %r25