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[217.140.110.172]) by mx.google.com with ESMTP id j7si20908509eds.315.2019.07.31.08.47.16 for ; Wed, 31 Jul 2019 08:47:16 -0700 (PDT) Received-SPF: pass (google.com: domain of steven.price@arm.com designates 217.140.110.172 as permitted sender) client-ip=217.140.110.172; Authentication-Results: mx.google.com; spf=pass (google.com: domain of steven.price@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=steven.price@arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 789A81576; Wed, 31 Jul 2019 08:47:15 -0700 (PDT) Received: from e112269-lin.arm.com (e112269-lin.cambridge.arm.com [10.1.196.133]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E394B3F694; Wed, 31 Jul 2019 08:47:12 -0700 (PDT) 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?q?J=C3=A9r=C3=B4me=20Glisse?= , 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" , Andrew Morton Subject: [PATCH v10 22/22] arm64: mm: Display non-present entries in ptdump Date: Wed, 31 Jul 2019 16:46:03 +0100 Message-Id: <20190731154603.41797-23-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190731154603.41797-1-steven.price@arm.com> References: <20190731154603.41797-1-steven.price@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: Previously the /sys/kernel/debug/kernel_page_tables file would only show lines for entries present in the page tables. However it is useful to also show non-present entries as this makes the size and level of the holes more visible. This aligns the behaviour with x86 which also shows holes. Signed-off-by: Steven Price --- arch/arm64/mm/dump.c | 27 ++++++++++++++------------- 1 file changed, 14 insertions(+), 13 deletions(-) diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c index 5cc71ad567b4..765e8fc5640a 100644 --- a/arch/arm64/mm/dump.c +++ b/arch/arm64/mm/dump.c @@ -259,21 +259,22 @@ static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level, if (st->current_prot) { note_prot_uxn(st, addr); note_prot_wx(st, addr); - pt_dump_seq_printf(st->seq, "0x%016lx-0x%016lx ", - st->start_address, addr); + } - delta = (addr - st->start_address) >> 10; - while (!(delta & 1023) && unit[1]) { - delta >>= 10; - unit++; - } - pt_dump_seq_printf(st->seq, "%9lu%c %s", delta, *unit, - pg_level[st->level].name); - if (pg_level[st->level].bits) - dump_prot(st, pg_level[st->level].bits, - pg_level[st->level].num); - pt_dump_seq_puts(st->seq, "\n"); + pt_dump_seq_printf(st->seq, "0x%016lx-0x%016lx ", + st->start_address, addr); + + delta = (addr - st->start_address) >> 10; + while (!(delta & 1023) && unit[1]) { + delta >>= 10; + unit++; } + pt_dump_seq_printf(st->seq, "%9lu%c %s", delta, *unit, + pg_level[st->level].name); + if (st->current_prot && pg_level[st->level].bits) + dump_prot(st, pg_level[st->level].bits, + pg_level[st->level].num); + pt_dump_seq_puts(st->seq, "\n"); if (addr >= st->marker[1].start_address) { st->marker++; -- 2.20.1