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[217.140.101.70]) by mx.google.com with ESMTP id v6si6499448edm.178.2019.02.27.09.07.50 for ; Wed, 27 Feb 2019 09:07:50 -0800 (PST) Received-SPF: pass (google.com: domain of steven.price@arm.com designates 217.140.101.70 as permitted sender) client-ip=217.140.101.70; Authentication-Results: mx.google.com; spf=pass (google.com: domain of steven.price@arm.com designates 217.140.101.70 as permitted sender) smtp.mailfrom=steven.price@arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 810B91684; Wed, 27 Feb 2019 09:07:49 -0800 (PST) Received: from e112269-lin.arm.com (e112269-lin.cambridge.arm.com [10.1.196.69]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id ABB0C3F738; Wed, 27 Feb 2019 09:07:45 -0800 (PST) From: Steven Price To: linux-mm@kvack.org Cc: Steven Price , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Dave Hansen , Ingo Molnar , James Morse , =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , Peter Zijlstra , Thomas Gleixner , Will Deacon , x86@kernel.org, "H. Peter Anvin" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Rutland , "Liang, Kan" , Jeff Dike , Richard Weinberger , Anton Ivanov , linux-um@lists.infradead.org Subject: [PATCH v3 21/34] um: mm: Add p?d_large() definitions Date: Wed, 27 Feb 2019 17:05:55 +0000 Message-Id: <20190227170608.27963-22-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190227170608.27963-1-steven.price@arm.com> References: <20190227170608.27963-1-steven.price@arm.com> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: X-Virus-Scanned: ClamAV using ClamSMTP walk_page_range() is going to be allowed to walk page tables other than those of user space. For this it needs to know when it has reached a 'leaf' entry in the page tables. This information is provided by the p?d_large() functions/macros. For um, we don't support large pages, so add stubs returning 0. CC: Jeff Dike CC: Richard Weinberger CC: Anton Ivanov CC: linux-um@lists.infradead.org Signed-off-by: Steven Price --- arch/um/include/asm/pgtable-3level.h | 1 + arch/um/include/asm/pgtable.h | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/um/include/asm/pgtable-3level.h b/arch/um/include/asm/pgtable-3level.h index c4d876dfb9ac..2abf9aa5808e 100644 --- a/arch/um/include/asm/pgtable-3level.h +++ b/arch/um/include/asm/pgtable-3level.h @@ -57,6 +57,7 @@ #define pud_none(x) (!(pud_val(x) & ~_PAGE_NEWPAGE)) #define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE) #define pud_present(x) (pud_val(x) & _PAGE_PRESENT) +#define pud_large(x) (0) #define pud_populate(mm, pud, pmd) \ set_pud(pud, __pud(_PAGE_TABLE + __pa(pmd))) diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h index 9c04562310b3..d5fa4e118dcc 100644 --- a/arch/um/include/asm/pgtable.h +++ b/arch/um/include/asm/pgtable.h @@ -100,6 +100,7 @@ extern unsigned long end_iomem; #define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE) #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) +#define pmd_large(x) (0) #define pmd_clear(xp) do { pmd_val(*(xp)) = _PAGE_NEWPAGE; } while (0) #define pmd_newpage(x) (pmd_val(x) & _PAGE_NEWPAGE)