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 9B8BF341AC3; Tue, 16 Dec 2025 11:34:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765884895; cv=none; b=mK6UFlWJlTLEhQkz4NPF5zWaX3IBacMFdBTfbteZtQgldqyeszPkByvflkkcXjBapuQ+qjE4kvLuY4Ug7/Lzgum3JkMm1Nxv6MYJP1v/vVIfXK9BR4HSgpuu/OTgEIjMHKWO8FQ2mjlI6R3jkPmg4J3am097afeyKcincBjAvzM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765884895; c=relaxed/simple; bh=M2PmgGJQ+dYzYbxOasY8hgPDliYqJRU7LK4KaE+zXSw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JR1Mv26OPYdQQXBUXn6STACz2ND19/qMZJoBAYD4zN7vfF0jLY+cwfC5QZ/rw65WKvTk/gL2pCnO3t0BujGsuvEZ1zkANp/sScuXwNkGvBx3b5UHPMNn/+A+wOd3OZXutJ09/p5S8rBpqkTrVvGDo/kzSKQBm7lyzi69y7j7mws= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=GiM7cuJJ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="GiM7cuJJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 13086C4CEF1; Tue, 16 Dec 2025 11:34:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1765884895; bh=M2PmgGJQ+dYzYbxOasY8hgPDliYqJRU7LK4KaE+zXSw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GiM7cuJJLM0dryAf+tUY9cl+XqU53r1bbRRX7SqK06qCWwFekLZMK+G3qMxJzo4md eCwzxeVxKOGAblgJCTjkq1zigRQ/b4C8akQecOwOOebPIVKD79NZ422Vpn4Li4NbeE mEq/NAVoxUnis+Nt/QVJkYEYq4qoyxakvzJKeIDM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xiaogang Chen , Philip Yang , Alex Deucher , Sasha Levin Subject: [PATCH 6.12 332/354] drm/amdkfd: Use huge page size to check split svm range alignment Date: Tue, 16 Dec 2025 12:14:59 +0100 Message-ID: <20251216111332.937548922@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251216111320.896758933@linuxfoundation.org> References: <20251216111320.896758933@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Xiaogang Chen [ Upstream commit bf2084a7b1d75d093b6a79df4c10142d49fbaa0e ] When split svm ranges that have been mapped using huge page should use huge page size(2MB) to check split range alignment, not prange->granularity that means migration granularity. Fixes: 7ef6b2d4b7e5 ("drm/amdkfd: remap unaligned svm ranges that have split") Signed-off-by: Xiaogang Chen Reviewed-by: Philip Yang Signed-off-by: Alex Deucher (cherry picked from commit 448ee45353ef9fb1a34f5f26eb3f48923c6f0898) Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 46 +++++++++++++++++++--------- 1 file changed, 32 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index 99ce4fe5eb170..d65b0b23ec7b8 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -1143,30 +1143,48 @@ static int svm_range_split_tail(struct svm_range *prange, uint64_t new_last, struct list_head *insert_list, struct list_head *remap_list) { + unsigned long last_align_down = ALIGN_DOWN(prange->last, 512); + unsigned long start_align = ALIGN(prange->start, 512); + bool huge_page_mapping = last_align_down > start_align; struct svm_range *tail = NULL; - int r = svm_range_split(prange, prange->start, new_last, &tail); + int r; - if (!r) { - list_add(&tail->list, insert_list); - if (!IS_ALIGNED(new_last + 1, 1UL << prange->granularity)) - list_add(&tail->update_list, remap_list); - } - return r; + r = svm_range_split(prange, prange->start, new_last, &tail); + + if (r) + return r; + + list_add(&tail->list, insert_list); + + if (huge_page_mapping && tail->start > start_align && + tail->start < last_align_down && (!IS_ALIGNED(tail->start, 512))) + list_add(&tail->update_list, remap_list); + + return 0; } static int svm_range_split_head(struct svm_range *prange, uint64_t new_start, struct list_head *insert_list, struct list_head *remap_list) { + unsigned long last_align_down = ALIGN_DOWN(prange->last, 512); + unsigned long start_align = ALIGN(prange->start, 512); + bool huge_page_mapping = last_align_down > start_align; struct svm_range *head = NULL; - int r = svm_range_split(prange, new_start, prange->last, &head); + int r; - if (!r) { - list_add(&head->list, insert_list); - if (!IS_ALIGNED(new_start, 1UL << prange->granularity)) - list_add(&head->update_list, remap_list); - } - return r; + r = svm_range_split(prange, new_start, prange->last, &head); + + if (r) + return r; + + list_add(&head->list, insert_list); + + if (huge_page_mapping && head->last + 1 > start_align && + head->last + 1 < last_align_down && (!IS_ALIGNED(head->last, 512))) + list_add(&head->update_list, remap_list); + + return 0; } static void -- 2.51.0