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Date:	Mon, 1 Sep 2014 09:22:07 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Laszlo Ersek <lersek@...hat.com>
Cc:	linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, x86@...nel.org,
	linux-ia64@...r.kernel.org, matt.fleming@...el.com,
	msalter@...hat.com
Subject: Re: [PATCH 0/5] beautify EFI memmap logs


* Laszlo Ersek <lersek@...hat.com> wrote:

> It's a pain to analyze EFI memmap logs while debugging, especially to
> verify the memory types (an enum) and the memory attributes (a bitmap).
> This series renders those columns human-readable, and unifies their
> formatting between x86, ia64 and arm64.
> 
> Example output with the patchset on arm64 (in a qemu-system-aarch64
> guest, booted with Ard's v5 series from edk2-devel ("QEMU_EFI.fd")):
> 
> > Processing EFI memory map:
> >   0x000040000000-0x000040000fff [Loader Data        |   |  |  |  |   |WB|WT|WC|UC]
> >   0x000040001000-0x00004007ffff [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC]
> >   0x000040080000-0x00004072afff [Loader Data        |   |  |  |  |   |WB|WT|WC|UC]
> >   0x00004072b000-0x00005fdfffff [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC]
> >   0x00005fe00000-0x00005fe0ffff [Loader Data        |   |  |  |  |   |WB|WT|WC|UC]
> >   0x00005fe10000-0x0000964e8fff [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC]
> >   0x0000964e9000-0x0000964e9fff [Loader Data        |   |  |  |  |   |WB|WT|WC|UC]
> >   0x0000964ea000-0x000096c52fff [Loader Code        |   |  |  |  |   |WB|WT|WC|UC]
> >   0x000096c53000-0x00009709dfff [Boot Code          |   |  |  |  |   |WB|WT|WC|UC]*
> >   0x00009709e000-0x0000970b3fff [Runtime Code       |RUN|  |  |  |   |WB|WT|WC|UC]*
> >   0x0000970b4000-0x0000970f4fff [Runtime Data       |RUN|  |  |  |   |WB|WT|WC|UC]*
> >   0x0000970f5000-0x000097117fff [Runtime Code       |RUN|  |  |  |   |WB|WT|WC|UC]*
> >   0x000097118000-0x000097199fff [Runtime Data       |RUN|  |  |  |   |WB|WT|WC|UC]*
> >   0x00009719a000-0x0000971dffff [Runtime Code       |RUN|  |  |  |   |WB|WT|WC|UC]*
> >   0x0000971e0000-0x0000997f8fff [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC]
> >   0x0000997f9000-0x0000998f1fff [Boot Data          |   |  |  |  |   |WB|WT|WC|UC]*
> >   0x0000998f2000-0x0000999eafff [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC]
> >   0x0000999eb000-0x00009af09fff [Boot Data          |   |  |  |  |   |WB|WT|WC|UC]*
> >   0x00009af0a000-0x00009af21fff [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC]
> >   0x00009af22000-0x00009af46fff [Boot Data          |   |  |  |  |   |WB|WT|WC|UC]*
> >   0x00009af47000-0x00009af5bfff [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC]
> >   0x00009af5c000-0x00009afe1fff [Boot Data          |   |  |  |  |   |WB|WT|WC|UC]*
> >   0x00009afe2000-0x00009afe2fff [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC]
> >   0x00009afe3000-0x00009c01ffff [Boot Data          |   |  |  |  |   |WB|WT|WC|UC]*
> >   0x00009c020000-0x00009efbffff [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC]
> >   0x00009efc0000-0x00009f14efff [Boot Code          |   |  |  |  |   |WB|WT|WC|UC]*
> >   0x00009f14f000-0x00009f162fff [Runtime Code       |RUN|  |  |  |   |WB|WT|WC|UC]*
> >   0x00009f163000-0x00009f194fff [Runtime Data       |RUN|  |  |  |   |WB|WT|WC|UC]*
> >   0x00009f195000-0x00009f197fff [Boot Data          |   |  |  |  |   |WB|WT|WC|UC]*
> >   0x00009f198000-0x00009f198fff [Runtime Data       |RUN|  |  |  |   |WB|WT|WC|UC]*
> >   0x00009f199000-0x00009f1acfff [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC]
> >   0x00009f1ad000-0x00009f1affff [Boot Data          |   |  |  |  |   |WB|WT|WC|UC]*
> >   0x00009f1b0000-0x00009f1b0fff [Runtime Data       |RUN|  |  |  |   |WB|WT|WC|UC]*
> >   0x00009f1b1000-0x00009fffffff [Boot Data          |   |  |  |  |   |WB|WT|WC|UC]*
> >   0x000004000000-0x000007ffffff [Memory Mapped I/O  |RUN|  |  |  |   |  |  |  |UC]
> >   0x000009010000-0x000009010fff [Memory Mapped I/O  |RUN|  |  |  |   |  |  |  |UC]
> 
> Output on x86 (OVMF guest):
> 
> > [    0.000000] efi: mem00: [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000000000000-0x000000000009f000) (0MB)
> > [    0.000000] efi: mem01: [Loader Data        |   |  |  |  |   |WB|WT|WC|UC] range=[0x000000000009f000-0x00000000000a0000) (0MB)
> > [    0.000000] efi: mem02: [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000000100000-0x0000000000400000) (3MB)
> > [    0.000000] efi: mem03: [Loader Data        |   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000000400000-0x0000000000800000) (4MB)
> > [    0.000000] efi: mem04: [ACPI Memory NVS    |   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000000800000-0x0000000000808000) (0MB)
> > [    0.000000] efi: mem05: [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000000808000-0x0000000000810000) (0MB)
> > [    0.000000] efi: mem06: [ACPI Memory NVS    |   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000000810000-0x0000000000900000) (0MB)
> > [    0.000000] efi: mem07: [Boot Data          |   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000000900000-0x0000000001100000) (8MB)
> > [    0.000000] efi: mem08: [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000001100000-0x0000000001400000) (3MB)
> > [    0.000000] efi: mem09: [Loader Data        |   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000001400000-0x0000000002613000) (18MB)
> > [    0.000000] efi: mem10: [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000002613000-0x0000000004000000) (25MB)
> > [    0.000000] efi: mem11: [Boot Data          |   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000004000000-0x0000000004020000) (0MB)
> > [    0.000000] efi: mem12: [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000004020000-0x00000000068ea000) (40MB)
> > [    0.000000] efi: mem13: [Loader Data        |   |  |  |  |   |WB|WT|WC|UC] range=[0x00000000068ea000-0x00000000068f0000) (0MB)
> > [    0.000000] efi: mem14: [Boot Code          |   |  |  |  |   |WB|WT|WC|UC] range=[0x00000000068f0000-0x0000000006c7b000) (3MB)
> > [    0.000000] efi: mem15: [Runtime Data       |RUN|  |  |  |   |WB|WT|WC|UC] range=[0x0000000006c7b000-0x0000000006c7d000) (0MB)
> > [    0.000000] efi: mem16: [Runtime Code       |RUN|  |  |  |   |WB|WT|WC|UC] range=[0x0000000006c7d000-0x0000000006c85000) (0MB)
> > [    0.000000] efi: mem17: [Runtime Data       |RUN|  |  |  |   |WB|WT|WC|UC] range=[0x0000000006c85000-0x0000000006c87000) (0MB)
> > [    0.000000] efi: mem18: [Boot Code          |   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000006c87000-0x0000000006ca3000) (0MB)
> > [    0.000000] efi: mem19: [Runtime Data       |RUN|  |  |  |   |WB|WT|WC|UC] range=[0x0000000006ca3000-0x0000000006ca6000) (0MB)
> > [    0.000000] efi: mem20: [ACPI Memory NVS    |   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000006ca6000-0x0000000006cc6000) (0MB)
> > [    0.000000] efi: mem21: [Runtime Data       |RUN|  |  |  |   |WB|WT|WC|UC] range=[0x0000000006cc6000-0x0000000006d95000) (0MB)
> > [    0.000000] efi: mem22: [Runtime Code       |RUN|  |  |  |   |WB|WT|WC|UC] range=[0x0000000006d95000-0x0000000006e22000) (0MB)
> > [    0.000000] efi: mem23: [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000006e22000-0x0000000007165000) (3MB)
> > [    0.000000] efi: mem24: [Boot Data          |   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000007165000-0x0000000007d22000) (11MB)
> > [    0.000000] efi: mem25: [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000007d22000-0x0000000007d25000) (0MB)
> > [    0.000000] efi: mem26: [Boot Code          |   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000007d25000-0x0000000007ea2000) (1MB)
> > [    0.000000] efi: mem27: [Runtime Code       |RUN|  |  |  |   |WB|WT|WC|UC] range=[0x0000000007ea2000-0x0000000007ed2000) (0MB)
> > [    0.000000] efi: mem28: [Runtime Data       |RUN|  |  |  |   |WB|WT|WC|UC] range=[0x0000000007ed2000-0x0000000007ef6000) (0MB)
> > [    0.000000] efi: mem29: [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000007ef6000-0x0000000007f00000) (0MB)
> > [    0.000000] efi: mem30: [ACPI Reclaim Memory|   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000007f00000-0x0000000007f02000) (0MB)
> > [    0.000000] efi: mem31: [ACPI Memory NVS    |   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000007f02000-0x0000000007f06000) (0MB)
> > [    0.000000] efi: mem32: [Boot Data          |   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000007f06000-0x0000000007fd0000) (0MB)
> > [    0.000000] efi: mem33: [Runtime Data       |RUN|  |  |  |   |WB|WT|WC|UC] range=[0x0000000007fd0000-0x0000000007ff0000) (0MB)
> > [    0.000000] efi: mem34: [Conventional Memory|   |  |  |  |   |WB|WT|WC|UC] range=[0x0000000007ff0000-0x0000000008000000) (0MB)

Would be nice to see the 'before' dump as well, so that we can 
see exactly what changed.

Thanks,

	Ingo
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