From: Wei Huang <wei@redhat.com>
To: "Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>,
qemu-devel@nongnu.org, quintela@redhat.com,
peter.maydell@linaro.org
Cc: peterx@redhat.com
Subject: Re: [Qemu-devel] [PATCH] tests/migration: Add source to PC boot block
Date: Fri, 2 Feb 2018 11:25:09 -0600 [thread overview]
Message-ID: <93b45cc9-113c-6185-a4eb-14478fcf6bb9@redhat.com> (raw)
In-Reply-To: <20180131201633.28446-1-dgilbert@redhat.com>
On 01/31/2018 02:16 PM, Dr. David Alan Gilbert (git) wrote:
> From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
>
> The boot block used in the migration test is currently only
> shipped as a hex (with the source in the git commit message),
> change this to actually include the source.
>
> A makefile rule is added, but the expectation is that
> the generated hex is shipped as well as the .s, so that
> there's no requirement to have just the right assembler etc.
>
> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
> tests/Makefile.include | 18 ++++++++
> tests/migration-test.c | 46 +------------------
> tests/migration/x86-a-b-bootblock.h | 52 +++++++++++++++++++++
> tests/migration/x86-a-b-bootblock.s | 92 +++++++++++++++++++++++++++++++++++++
> 4 files changed, 163 insertions(+), 45 deletions(-)
> create mode 100644 tests/migration/x86-a-b-bootblock.h
> create mode 100644 tests/migration/x86-a-b-bootblock.s
>
> diff --git a/tests/Makefile.include b/tests/Makefile.include
> index 851aafe9d1..2a0889479c 100644
> --- a/tests/Makefile.include
> +++ b/tests/Makefile.include
> @@ -831,6 +831,24 @@ tests/migration/initrd-stress.img: tests/migration/stress$(EXESUF)
> rm $(INITRD_WORK_DIR)/init
> rmdir $(INITRD_WORK_DIR)
>
> +ASM_WORK_DIR=tests/asm-temp
> +$(SRC_PATH)/tests/migration/x86-a-b-bootblock.h: $(SRC_PATH)/tests/migration/x86-a-b-bootblock.s
> + mkdir $(ASM_WORK_DIR)
> + as --32 -march=i486 $< -o $(ASM_WORK_DIR).o
> + objcopy -O binary $(ASM_WORK_DIR).o $(ASM_WORK_DIR).boot
> + dd if=$(ASM_WORK_DIR).boot of=$(ASM_WORK_DIR).bootsect bs=256 count=2 skip=124
> + xxd -i $(ASM_WORK_DIR).bootsect | \
> + sed -e 's/tests_asm_temp_bootsect/bootsect/' -e 's/.*int.*//' > $(ASM_WORK_DIR).hex
> + echo -e "/* This file is automatically generated from\n" \
> + " * tests/migration/x86-a-b-bootblock.s, edit that and then\n" \
> + " * make tests/migration/x86-a-b-bootblock.h to update,\n" \
> + " * and then remember to send both in your patch submission.\n" \
> + " */\n" | cat - $(ASM_WORK_DIR).hex > $@
> + rm $(ASM_WORK_DIR).hex $(ASM_WORK_DIR).bootsect $(ASM_WORK_DIR).boot
> + rm $(ASM_WORK_DIR).o
> + rmdir $(ASM_WORK_DIR)
> +
> +
Could we create a new Makefile.include under tests/migration/ and move
the code above there? The code above is very large and can distract
people working on tests/Makefile.include.
> ifeq ($(CONFIG_POSIX),y)
> LIBS += -lutil
> endif
> diff --git a/tests/migration-test.c b/tests/migration-test.c
> index 799e24ebc6..7550fd8d56 100644
> --- a/tests/migration-test.c
> +++ b/tests/migration-test.c
> @@ -79,51 +79,7 @@ static const char *tmpfs;
> /* A simple PC boot sector that modifies memory (1-100MB) quickly
> * outputing a 'B' every so often if it's still running.
> */
> -unsigned char bootsect[] = {
> - 0xfa, 0x0f, 0x01, 0x16, 0x74, 0x7c, 0x66, 0xb8, 0x01, 0x00, 0x00, 0x00,
> - 0x0f, 0x22, 0xc0, 0x66, 0xea, 0x20, 0x7c, 0x00, 0x00, 0x08, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe4, 0x92, 0x0c, 0x02,
> - 0xe6, 0x92, 0xb8, 0x10, 0x00, 0x00, 0x00, 0x8e, 0xd8, 0x66, 0xb8, 0x41,
> - 0x00, 0x66, 0xba, 0xf8, 0x03, 0xee, 0xb3, 0x00, 0xb8, 0x00, 0x00, 0x10,
> - 0x00, 0xfe, 0x00, 0x05, 0x00, 0x10, 0x00, 0x00, 0x3d, 0x00, 0x00, 0x40,
> - 0x06, 0x7c, 0xf2, 0xfe, 0xc3, 0x75, 0xe9, 0x66, 0xb8, 0x42, 0x00, 0x66,
> - 0xba, 0xf8, 0x03, 0xee, 0xeb, 0xde, 0x66, 0x90, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x9a, 0xcf, 0x00,
> - 0xff, 0xff, 0x00, 0x00, 0x00, 0x92, 0xcf, 0x00, 0x27, 0x00, 0x5c, 0x7c,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa
> -};
> +#include "tests/migration/x86-a-b-bootblock.h"
>
> static void init_bootfile_x86(const char *bootpath)
> {
> diff --git a/tests/migration/x86-a-b-bootblock.h b/tests/migration/x86-a-b-bootblock.h
> new file mode 100644
> index 0000000000..e45c8dd5b3
> --- /dev/null
> +++ b/tests/migration/x86-a-b-bootblock.h
> @@ -0,0 +1,52 @@
> +/* This file is automatically generated from
> + * tests/migration/x86-a-b-bootblock.s, edit that and then
> + * make tests/migration/x86-a-b-bootblock.h to update,
> + * and then remember to send both in your patch submission.
> + */
> +
> +unsigned char bootsect[] = {
Given that this is arch-dependent, I think it will be better to add
"x86_" as prefix to this variable.
> + 0xfa, 0x0f, 0x01, 0x16, 0x74, 0x7c, 0x66, 0xb8, 0x01, 0x00, 0x00, 0x00,
> + 0x0f, 0x22, 0xc0, 0x66, 0xea, 0x20, 0x7c, 0x00, 0x00, 0x08, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe4, 0x92, 0x0c, 0x02,
> + 0xe6, 0x92, 0xb8, 0x10, 0x00, 0x00, 0x00, 0x8e, 0xd8, 0x66, 0xb8, 0x41,
> + 0x00, 0x66, 0xba, 0xf8, 0x03, 0xee, 0xb3, 0x00, 0xb8, 0x00, 0x00, 0x10,
> + 0x00, 0xfe, 0x00, 0x05, 0x00, 0x10, 0x00, 0x00, 0x3d, 0x00, 0x00, 0x40,
> + 0x06, 0x7c, 0xf2, 0xfe, 0xc3, 0x75, 0xe9, 0x66, 0xb8, 0x42, 0x00, 0x66,
> + 0xba, 0xf8, 0x03, 0xee, 0xeb, 0xde, 0x66, 0x90, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x9a, 0xcf, 0x00,
> + 0xff, 0xff, 0x00, 0x00, 0x00, 0x92, 0xcf, 0x00, 0x27, 0x00, 0x5c, 0x7c,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa
> +};
> +
> diff --git a/tests/migration/x86-a-b-bootblock.s b/tests/migration/x86-a-b-bootblock.s
> new file mode 100644
> index 0000000000..7f290014af
> --- /dev/null
> +++ b/tests/migration/x86-a-b-bootblock.s
> @@ -0,0 +1,92 @@
> +# x86 bootblock used in migration test
> +# repeatedly increments the first byte of each page in a 100MB
> +# range.
> +# Outputs an initial 'A' on serial followed by repeated 'B's
> +#
> +# run make tests/migration/x86-a-b-bootblock.h
> +# to regenerate the hex, and remember to include both the .h and .s
> +# in any patches.
> +#
> +# Copyright (c) 2016 Red Hat, Inc. and/or its affiliates
> +# This work is licensed under the terms of the GNU GPL, version 2 or later.
> +# See the COPYING file in the top-level directory.
> +#
> +# Author: dgilbert@redhat.com
> +
> +
> +.code16
> +.org 0x7c00
> + .file "fill.s"
> + .text
> + .globl start
> + .type start, @function
> +start: # at 0x7c00 ?
> + cli
> + lgdt gdtdesc
> + mov $1,%eax
> + mov %eax,%cr0 # Protected mode enable
> + data32 ljmp $8,$0x7c20
> +
> +.org 0x7c20
> +.code32
> + # A20 enable - not sure I actually need this
> + inb $0x92,%al
> + or $2,%al
> + outb %al, $0x92
> +
> + # set up DS for the whole of RAM (needed on KVM)
> + mov $16,%eax
> + mov %eax,%ds
> +
> + mov $65,%ax
> + mov $0x3f8,%dx
> + outb %al,%dx
> +
> + # bl keeps a counter so we limit the output speed
> + mov $0, %bl
> +mainloop:
> + # Start from 1MB
> + mov $(1024*1024),%eax
> +innerloop:
> + incb (%eax)
> + add $4096,%eax
> + cmp $(100*1024*1024),%eax
> + jl innerloop
> +
> + inc %bl
> + jnz mainloop
> +
> + mov $66,%ax
> + mov $0x3f8,%dx
> + outb %al,%dx
> +
> + jmp mainloop
> +
> + # GDT magic from old (GPLv2) Grub startup.S
> + .p2align 2 /* force 4-byte alignment */
> +gdt:
> + .word 0, 0
> + .byte 0, 0, 0, 0
> +
> + /* -- code segment --
> + * base = 0x00000000, limit = 0xFFFFF (4 KiB Granularity), present
> + * type = 32bit code execute/read, DPL = 0
> + */
> + .word 0xFFFF, 0
> + .byte 0, 0x9A, 0xCF, 0
> +
> + /* -- data segment --
> + * base = 0x00000000, limit 0xFFFFF (4 KiB Granularity), present
> + * type = 32 bit data read/write, DPL = 0
> + */
> + .word 0xFFFF, 0
> + .byte 0, 0x92, 0xCF, 0
> +
> +gdtdesc:
> + .word 0x27 /* limit */
> + .long gdt /* addr */
> +
> +/* I'm a bootable disk */
> +.org 0x7dfe
> + .byte 0x55
> + .byte 0xAA
>
next prev parent reply other threads:[~2018-02-02 17:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-31 20:16 [Qemu-devel] [PATCH] tests/migration: Add source to PC boot block Dr. David Alan Gilbert (git)
2018-02-02 17:25 ` Wei Huang [this message]
2018-02-05 18:06 ` Dr. David Alan Gilbert
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