[PATCH v3 3/4] x86: select CONFIG_64BIT for X86_64

Andrew Goodbody andrew.goodbody at linaro.org
Wed Nov 20 19:29:17 CET 2024


On 20/11/2024 13:46, Simon Glass wrote:
> Hi Andrew,
> 
> On Wed, 20 Nov 2024 at 03:02, Andrew Goodbody
> <andrew.goodbody at linaro.org> wrote:
>>
>> Select CONFIG_64BIT so that we pass the -m64 option (instead of -m32) to
>> static analysis tools.
>> Introduce CONFIG_SPL_64BIT and select it for architectures other than
>> x86 with 64 bit builds. Do not select it for x86 builds as x86 uses
>> a 32 bit SPL.
>> Ensure that when limits are set they use CONFIG_64BIT for U-Boot
>> proper and CONFIG_SPL_64BIT for SPL. This is to allow for the 32 bit
>> SPL build used by x86.
>>
>> Signed-off-by: Dan Carpenter <dan.carpenter at linaro.org>
>> Signed-off-by: Andrew Goodbody <andrew.goodbody at linaro.org>
>> ---
>>
>> Changes in v3:
>> Introduce CONFIG_SPL_64BIT to allow for x86 building a 32 bit SPL and
>> a 64 bit U-Boot proper.
>>
>> Changes in v2:
>> Corrected commit title to be x86 not sandbox
>>
>>   arch/Kconfig         | 3 +++
>>   arch/arm/Kconfig     | 1 +
>>   arch/mips/Kconfig    | 4 ++++
>>   arch/riscv/Kconfig   | 1 +
>>   arch/sandbox/Kconfig | 1 +
>>   arch/x86/Kconfig     | 1 +
>>   common/bloblist.c    | 3 ++-
>>   include/limits.h     | 3 ++-
>>   8 files changed, 15 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/Kconfig b/arch/Kconfig
>> index 6258788f53..c726ac5fc7 100644
>> --- a/arch/Kconfig
>> +++ b/arch/Kconfig
>> @@ -38,6 +38,9 @@ config 32BIT
>>   config 64BIT
>>          bool
>>
>> +config SPL_64BIT
>> +       bool
> 
> Please document what this means and its implications, with some help

Ack

>> +
>>   config SYS_CACHELINE_SIZE
>>          int
>>          default 128 if SYS_CACHE_SHIFT_7
>> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
>> index 7282c4123b..055762b0b9 100644
>> --- a/arch/arm/Kconfig
>> +++ b/arch/arm/Kconfig
>> @@ -7,6 +7,7 @@ config SYS_ARCH
>>   config ARM64
>>          bool
>>          select 64BIT
>> +       select SPL_64BIT if SPL
>>          select PHYS_64BIT
>>          select SYS_CACHE_SHIFT_6
>>          imply SPL_SEPARATE_BSS
>> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
>> index 38577af43d..7ea439e857 100644
>> --- a/arch/mips/Kconfig
>> +++ b/arch/mips/Kconfig
>> @@ -211,6 +211,7 @@ config CPU_MIPS64_R1
>>          bool "MIPS64 Release 1"
>>          depends on SUPPORTS_CPU_MIPS64_R1
>>          select 64BIT
>> +       select SPL_64BIT if SPL
>>          help
>>            Choose this option to build a kernel for release 1 through 5 of the
>>            MIPS64 architecture.
>> @@ -219,6 +220,7 @@ config CPU_MIPS64_R2
>>          bool "MIPS64 Release 2"
>>          depends on SUPPORTS_CPU_MIPS64_R2
>>          select 64BIT
>> +       select SPL_64BIT if SPL
>>          help
>>            Choose this option to build a kernel for release 2 through 5 of the
>>            MIPS64 architecture.
>> @@ -227,6 +229,7 @@ config CPU_MIPS64_R6
>>          bool "MIPS64 Release 6"
>>          depends on SUPPORTS_CPU_MIPS64_R6
>>          select 64BIT
>> +       select SPL_64BIT if SPL
>>          help
>>            Choose this option to build a kernel for release 6 or later of the
>>            MIPS64 architecture.
>> @@ -235,6 +238,7 @@ config CPU_MIPS64_OCTEON
>>          bool "Marvell Octeon series of CPUs"
>>          depends on SUPPORTS_CPU_MIPS64_OCTEON
>>          select 64BIT
>> +       select SPL_64BIT if SPL
>>          help
>>           Choose this option for Marvell Octeon CPUs.  These CPUs are between
>>           MIPS64 R5 and R6 with other extensions.
>> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
>> index 043d963f63..abb7a984c4 100644
>> --- a/arch/riscv/Kconfig
>> +++ b/arch/riscv/Kconfig
>> @@ -120,6 +120,7 @@ config ARCH_RV32I
>>   config ARCH_RV64I
>>          bool "RV64I"
>>          select 64BIT
>> +       select SPL_64BIT if SPL
>>          select PHYS_64BIT
>>          help
>>            Choose this option to target the RV64I base integer instruction set.
>> diff --git a/arch/sandbox/Kconfig b/arch/sandbox/Kconfig
>> index db29ca14bd..4c169034d9 100644
>> --- a/arch/sandbox/Kconfig
>> +++ b/arch/sandbox/Kconfig
>> @@ -47,6 +47,7 @@ config HOST_32BIT
>>   config HOST_64BIT
>>          def_bool $(cc-define,_LP64)
>>          select 64BIT
>> +       select SPL_64BIT if SPL
>>
>>   config HOST_HAS_SDL
>>          def_bool $(success,sdl2-config --version)
>> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
>> index 23a1e21b29..006a59d6fa 100644
>> --- a/arch/x86/Kconfig
>> +++ b/arch/x86/Kconfig
>> @@ -44,6 +44,7 @@ endchoice
>>
>>   config X86_64
>>          bool
>> +       select 64BIT
>>
>>   config SPL_X86_64
>>          bool
>> diff --git a/common/bloblist.c b/common/bloblist.c
>> index ec6ff7a5a9..30fe1cb4b3 100644
>> --- a/common/bloblist.c
>> +++ b/common/bloblist.c
>> @@ -579,7 +579,8 @@ int bloblist_check_reg_conv(ulong rfdt, ulong rzero, ulong rsig)
>>          ulong version = BLOBLIST_REGCONV_VER;
>>          ulong sigval;
>>
>> -       sigval = (IS_ENABLED(CONFIG_64BIT)) ?
>> +       sigval = ((IS_ENABLED(CONFIG_64BIT) && !IS_ENABLED(CONFIG_SPL_BUILD)) ||
>> +                       (IS_ENABLED(CONFIG_SPL_64BIT) && IS_ENABLED(CONFIG_SPL_BUILD))) ?
>>                          ((BLOBLIST_MAGIC & ((1UL << BLOBLIST_REGCONV_SHIFT_64) - 1)) |
>>                           ((version  & BLOBLIST_REGCONV_MASK) << BLOBLIST_REGCONV_SHIFT_64)) :
>>                          ((BLOBLIST_MAGIC & ((1UL << BLOBLIST_REGCONV_SHIFT_32) - 1)) |
> 
> Gosh this is pretty ugly.
> 
> Can you split it into separate statements?

Like this?

if ((IS_ENABLED(CONFIG_64BIT) && !IS_ENABLED(CONFIG_SPL_BUILD)) ||
		(IS_ENABLED(CONFIG_SPL_64BIT) && IS_ENABLED(CONFIG_SPL_BUILD))) {
	sigval = ((BLOBLIST_MAGIC & ((1UL << BLOBLIST_REGCONV_SHIFT_64) - 1)) |
		 ((version  & BLOBLIST_REGCONV_MASK) << BLOBLIST_REGCONV_SHIFT_64));
} else {
	sigval = ((BLOBLIST_MAGIC & ((1UL << BLOBLIST_REGCONV_SHIFT_32) - 1)) |
		 ((version  & BLOBLIST_REGCONV_MASK) << BLOBLIST_REGCONV_SHIFT_32));
}

Andrew


>> diff --git a/include/limits.h b/include/limits.h
>> index 4700cc7a59..1d0bbf69be 100644
>> --- a/include/limits.h
>> +++ b/include/limits.h
>> @@ -9,7 +9,8 @@
>>   #define UINT32_MAX  0xffffffffU
>>   #define UINT64_MAX  0xffffffffffffffffULL
>>
>> -#ifdef CONFIG_64BIT
>> +#if (defined(CONFIG_64BIT) && !defined(CONFIG_SPL_BUILD)) || \
>> +       (defined(CONFIG_SPL_64BIT) && defined(CONFIG_SPL_BUILD))
>>       #define UINTPTR_MAX UINT64_MAX
>>   #else
>>       #define UINTPTR_MAX UINT32_MAX
>> --
>> 2.39.5
>>
> 
> REgards,
> Simon



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