[PATCH v6 8/9] x86: add --pass-memmap-cmdline option

WANG Chao
2014-04-14T14:56:27Z

--pass-memmap-cmdline is used for pass memmap=exactmap cmdline for 2nd
kernel. Later we will use this option to disable passing E820 memmap
method but use the old exactmap method.

Signed-off-by: WANG Chao <chaowang@redhat.com>
Tested-by: Linn Crosetto <linn@hp.com>
---
kexec/arch/i386/include/arch/options.h | 2 ++
kexec/arch/i386/kexec-x86.c | 4 ++++
kexec/arch/i386/kexec-x86.h | 1 +
kexec/arch/x86_64/kexec-x86_64.c | 5 +++++
4 files changed, 12 insertions(+)

diff --git a/kexec/arch/i386/include/arch/options.h b/kexec/arch/i386/include/arch/options.h
index aaac731..e5300b5 100644
--- a/kexec/arch/i386/include/arch/options.h
+++ b/kexec/arch/i386/include/arch/options.h
@@ -30,6 +30,7 @@
#define OPT_VGA (OPT_ARCH_MAX+8)
#define OPT_REAL_MODE (OPT_ARCH_MAX+9)
#define OPT_ENTRY_32BIT (OPT_ARCH_MAX+10)
+#define OPT_PASS_MEMMAP_CMDLINE (OPT_ARCH_MAX+11)

/* Options relevant to the architecture (excluding loader-specific ones): */
#define KEXEC_ARCH_OPTIONS \
@@ -41,6 +42,7 @@
{ "console-serial", 0, 0, OPT_CONSOLE_SERIAL }, \
{ "elf32-core-headers", 0, 0, OPT_ELF32_CORE }, \
{ "elf64-core-headers", 0, 0, OPT_ELF64_CORE }, \
+ { "pass-memmap-cmdline", 0, 0, OPT_PASS_MEMMAP_CMDLINE }, \

#define KEXEC_ARCH_OPT_STR KEXEC_OPT_STR ""

diff --git a/kexec/arch/i386/kexec-x86.c b/kexec/arch/i386/kexec-x86.c
index 014ecd5..0b58dff 100644
--- a/kexec/arch/i386/kexec-x86.c
+++ b/kexec/arch/i386/kexec-x86.c
@@ -54,6 +54,7 @@ void arch_usage(void)
" --console-serial Enable the serial console\n"
" --elf32-core-headers Prepare core headers in ELF32 format\n"
" --elf64-core-headers Prepare core headers in ELF64 format\n"
+ " --pass--memmap-cmdline Pass memory map via command line in kexec on panic case\n"
);
}

@@ -64,6 +65,7 @@ struct arch_options_t arch_options = {
.console_vga = 0,
.console_serial = 0,
.core_header_type = CORE_TYPE_UNDEF,
+ .pass_memmap_cmdline = 0,
};

int arch_process_options(int argc, char **argv)
@@ -133,6 +135,8 @@ int arch_process_options(int argc, char **argv)
case OPT_ELF64_CORE:
arch_options.core_header_type = CORE_TYPE_ELF64;
break;
+ case OPT_PASS_MEMMAP_CMDLINE:
+ arch_options.pass_memmap_cmdline = 1;
}
}
/* Reset getopt for the next pass; called in other source modules */
diff --git a/kexec/arch/i386/kexec-x86.h b/kexec/arch/i386/kexec-x86.h
index 5aa2a46..e8c9188 100644
--- a/kexec/arch/i386/kexec-x86.h
+++ b/kexec/arch/i386/kexec-x86.h
@@ -50,6 +50,7 @@ struct arch_options_t {
uint8_t console_vga;
uint8_t console_serial;
enum coretype core_header_type;
+ uint8_t pass_memmap_cmdline;
};

int multiboot_x86_probe(const char *buf, off_t len);
diff --git a/kexec/arch/x86_64/kexec-x86_64.c b/kexec/arch/x86_64/kexec-x86_64.c
index 5c23e01..f70851d 100644
--- a/kexec/arch/x86_64/kexec-x86_64.c
+++ b/kexec/arch/x86_64/kexec-x86_64.c
@@ -53,6 +53,7 @@ void arch_usage(void)
" --serial-baud=<baud_rate> Specify the serial port baud rate\n"
" --console-vga Enable the vga console\n"
" --console-serial Enable the serial console\n"
+ " --pass-memmap-cmdline Pass memory map via command line in kexec on panic case\n"
);
}

@@ -63,6 +64,7 @@ struct arch_options_t arch_options = {
.console_vga = 0,
.console_serial = 0,
.core_header_type = CORE_TYPE_ELF64,
+ .pass_memmap_cmdline = 0,
};

int arch_process_options(int argc, char **argv)
@@ -126,6 +128,9 @@ int arch_process_options(int argc, char **argv)
}
arch_options.serial_baud = value;
break;
+ case OPT_PASS_MEMMAP_CMDLINE:
+ arch_options.pass_memmap_cmdline = 1;
+ break;
}
}
/* Reset getopt for the next pass; called in other source modules */
--
1.9.0