From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BC832CCA473 for ; Fri, 24 Jun 2022 17:37:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231888AbiFXRhe (ORCPT ); Fri, 24 Jun 2022 13:37:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36066 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231739AbiFXRh0 (ORCPT ); Fri, 24 Jun 2022 13:37:26 -0400 Received: from mail-ua1-x94a.google.com (mail-ua1-x94a.google.com [IPv6:2607:f8b0:4864:20::94a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A3A65DF3E for ; Fri, 24 Jun 2022 10:37:24 -0700 (PDT) Received: by mail-ua1-x94a.google.com with SMTP id j15-20020ab0644f000000b00368bac468ceso1007662uap.17 for ; Fri, 24 Jun 2022 10:37:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=BHwQikGJ0T9dngSuqajvJzRNJRNB+p1hBOZL6v8gtdU=; b=SJaLm0XrTpsH4nsCpNczOnWA4pAKrfnpfCQD7J/A/w8ZLuyF3qMil1lg2kFawB2M4a itbVC6Cy96FvwmkCOrHBppgxya0l4XK+nbemqmVGl2TtO1nxOedDpeGypnCjJRZS7QQN NDC0hCezqTOYHNT6HpGvGH8b8GjOJaayBlAgzsQ6R71RrjTlRa2+jtXbsXNhdPHlJ6Xj Bf0Xtsg/vvdXkEZqCE7ZRTpn6YWG/VddVaye5OHuJMLgDbbZwZkgCRO6djsmySZP8iDS KKIDvmk/HJlHB4lLRHC4SCJoBQ4oZp4rMf+AAsSXjtVnRk/loJUaiEBO6jLZd1OibD+8 oWQQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=BHwQikGJ0T9dngSuqajvJzRNJRNB+p1hBOZL6v8gtdU=; b=y5m8IjKspkb9qekqrWFumUh7pDEku/dAz2XjEfai7lE2yCkD/Qeu6aLSI1WBfXi2gI 9CmPDgBW7tmOVAGCndEM4Xeb5a2MUYQ/bHHL4JECvUkzLrZlIvQARly5yiFbfCYv/mKM NkjKq+oHnjOODUUMR5jPX46PgU6xZyHzMgXjaOS8zpcNF9fBJLn5kJEcIlOZ7GDeVIVg VZCv4JI30sUJx1UJ4CCZ4bIYgHUglB6+eKkPZoeujakvVS9bd8VefbmQudHhIt+4yvLY o3t/PIcf293uYYjXa+51TO4BS9Cki1gV44snPOmA30lOuN8NBaUie+nMiT31LrSzZcdo CpLA== X-Gm-Message-State: AJIora8b2UiaDNUnofBqXF9dDNUynpJ3rmoOodEFxMkkkS62Gcul2+cT TzHCMJAlHbzf5QuN7CBHjCpmHKx0C1OTX3F0 X-Google-Smtp-Source: AGRyM1vwAeqnR6McfUFoedAHpp3M9GTRsmGOf0kSjUYrMb74mEmizd7GUpekp5x9kN5nii0pCQDDYM1i4RCw9Zq8 X-Received: from jthoughton.c.googlers.com ([fda3:e722:ac3:cc00:14:4d90:c0a8:2a4f]) (user=jthoughton job=sendgmr) by 2002:a67:d785:0:b0:354:355b:60cd with SMTP id q5-20020a67d785000000b00354355b60cdmr14256935vsj.65.1656092243596; Fri, 24 Jun 2022 10:37:23 -0700 (PDT) Date: Fri, 24 Jun 2022 17:36:40 +0000 In-Reply-To: <20220624173656.2033256-1-jthoughton@google.com> Message-Id: <20220624173656.2033256-11-jthoughton@google.com> Mime-Version: 1.0 References: <20220624173656.2033256-1-jthoughton@google.com> X-Mailer: git-send-email 2.37.0.rc0.161.g10f37bed90-goog Subject: [RFC PATCH 10/26] hugetlb: add for_each_hgm_shift From: James Houghton To: Mike Kravetz , Muchun Song , Peter Xu Cc: David Hildenbrand , David Rientjes , Axel Rasmussen , Mina Almasry , Jue Wang , Manish Mishra , "Dr . David Alan Gilbert" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, James Houghton Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a helper macro to loop through all the usable page sizes for a high-granularity-enabled HugeTLB VMA. Given the VMA's hstate, it will loop, in descending order, through the page sizes that HugeTLB supports for this architecture; it always includes PAGE_SIZE. Signed-off-by: James Houghton --- mm/hugetlb.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 8b10b941458d..557b0afdb503 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -6989,6 +6989,16 @@ bool hugetlb_hgm_enabled(struct vm_area_struct *vma) /* All shared VMAs have HGM enabled. */ return vma->vm_flags & VM_SHARED; } +static unsigned int __shift_for_hstate(struct hstate *h) +{ + if (h >= &hstates[hugetlb_max_hstate]) + return PAGE_SHIFT; + return huge_page_shift(h); +} +#define for_each_hgm_shift(hstate, tmp_h, shift) \ + for ((tmp_h) = hstate; (shift) = __shift_for_hstate(tmp_h), \ + (tmp_h) <= &hstates[hugetlb_max_hstate]; \ + (tmp_h)++) #endif /* CONFIG_HUGETLB_HIGH_GRANULARITY_MAPPING */ /* -- 2.37.0.rc0.161.g10f37bed90-goog