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[PATCH v2 7/7] buildsys: Remove support for 32-bit MIPS hosts

Philippe Mathieu-Daudé posted 7 patches 2 weeks, 4 days ago
There is a newer version of this series
[PATCH v2 7/7] buildsys: Remove support for 32-bit MIPS hosts
Posted by Philippe Mathieu-Daudé 2 weeks, 4 days ago 
Stop detecting 32-bit MIPS host as supported, update the
deprecation document. See previous commit for rationale.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 docs/about/deprecated.rst       | 13 +++++--------
 docs/about/removed-features.rst |  6 ++++++
 configure                       |  7 -------
 3 files changed, 11 insertions(+), 15 deletions(-)

diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index 67e527740c0..79cc34cfeb6 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -172,17 +172,14 @@ This argument has always been ignored.
 Host Architectures
 ------------------
 
-Big endian MIPS since 7.2; 32-bit little endian MIPS since 9.2, MIPS since 11.0
-'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+MIPS (since 11.0)
+'''''''''''''''''
 
-As Debian 10 ("Buster") moved into LTS the big endian 32 bit version of
-MIPS moved out of support making it hard to maintain our
-cross-compilation CI tests of the architecture. As we no longer have
-CI coverage support may bitrot away before the deprecation process
+MIPS is not supported by Debian 13 ("Trixie") and newer, making it hard to
+maintain our cross-compilation CI tests of the architecture. As we no longer
+have CI coverage support may bitrot away before the deprecation process
 completes.
 
-Likewise, MIPS is not supported by Debian 13 ("Trixie") and newer.
-
 System emulation on 32-bit x86 hosts (since 8.0)
 ''''''''''''''''''''''''''''''''''''''''''''''''
 
diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
index a5338e44c24..53829f59e65 100644
--- a/docs/about/removed-features.rst
+++ b/docs/about/removed-features.rst
@@ -896,6 +896,12 @@ work around the atomicity issues in system mode by running all vCPUs
 in a single thread context; in user mode atomicity was simply broken.
 From 10.0, QEMU has disabled configuration of 64-bit guests on 32-bit hosts.
 
+32-bit MIPS (since 11.0)
+''''''''''''''''''''''''
+
+Debian 12 "Bookworm" removed support for 32-bit MIPS, making it hard to
+maintain our cross-compilation CI tests of the architecture.
+
 Guest Emulator ISAs
 -------------------
 
diff --git a/configure b/configure
index 6a633ac2b16..8236f43e8f9 100755
--- a/configure
+++ b/configure
@@ -404,8 +404,6 @@ elif check_define _ARCH_PPC ; then
 elif check_define __mips__ ; then
   if check_define __mips64 ; then
     cpu="mips64"
-  else
-    cpu="mips"
   fi
 elif check_define __s390__ ; then
   if check_define __s390x__ ; then
@@ -473,11 +471,6 @@ case "$cpu" in
     host_arch=mips
     linux_arch=mips
     ;;
-  mips*)
-    cpu=mips
-    host_arch=mips
-    linux_arch=mips
-    ;;
 
   ppc)
     host_arch=ppc
-- 
2.51.0
Re: [PATCH v2 7/7] buildsys: Remove support for 32-bit MIPS hosts
Posted by Daniel P. Berrangé 2 weeks, 3 days ago 
On Thu, Oct 09, 2025 at 09:52:10PM +0200, Philippe Mathieu-Daudé wrote:
> Stop detecting 32-bit MIPS host as supported, update the
> deprecation document. See previous commit for rationale.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  docs/about/deprecated.rst       | 13 +++++--------
>  docs/about/removed-features.rst |  6 ++++++
>  configure                       |  7 -------
>  3 files changed, 11 insertions(+), 15 deletions(-)
> 
> diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
> index 67e527740c0..79cc34cfeb6 100644
> --- a/docs/about/deprecated.rst
> +++ b/docs/about/deprecated.rst
> @@ -172,17 +172,14 @@ This argument has always been ignored.
>  Host Architectures
>  ------------------
>  
> -Big endian MIPS since 7.2; 32-bit little endian MIPS since 9.2, MIPS since 11.0

Did 'Big endian MIPS' refer to 32-bit, or both 32 & 64-bit ?  I'm guessing
it was only 32-bit BE, given the heading of your removed-features.txt
change.

But then did "MIPS since 11.0" refer to 64-bit little endian only, or
both big & little endian for 64-bit ?

Given the wide variety of things all ambiguously called "MIPS",
its worth being explicit....

> -'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
> +MIPS (since 11.0)
> +'''''''''''''''''

...so if this is 64-bit MIPS, big & little endian, lets say so

>  
> -As Debian 10 ("Buster") moved into LTS the big endian 32 bit version of
> -MIPS moved out of support making it hard to maintain our
> -cross-compilation CI tests of the architecture. As we no longer have
> -CI coverage support may bitrot away before the deprecation process
> +MIPS is not supported by Debian 13 ("Trixie") and newer, making it hard to
> +maintain our cross-compilation CI tests of the architecture. As we no longer
> +have CI coverage support may bitrot away before the deprecation process
>  completes.
>  
> -Likewise, MIPS is not supported by Debian 13 ("Trixie") and newer.
> -
>  System emulation on 32-bit x86 hosts (since 8.0)
>  ''''''''''''''''''''''''''''''''''''''''''''''''
>  
> diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
> index a5338e44c24..53829f59e65 100644
> --- a/docs/about/removed-features.rst
> +++ b/docs/about/removed-features.rst
> @@ -896,6 +896,12 @@ work around the atomicity issues in system mode by running all vCPUs
>  in a single thread context; in user mode atomicity was simply broken.
>  From 10.0, QEMU has disabled configuration of 64-bit guests on 32-bit hosts.
>  
> +32-bit MIPS (since 11.0)
> +''''''''''''''''''''''''
> +
> +Debian 12 "Bookworm" removed support for 32-bit MIPS, making it hard to
> +maintain our cross-compilation CI tests of the architecture.
> +
>  Guest Emulator ISAs
>  -------------------
>  
> diff --git a/configure b/configure
> index 6a633ac2b16..8236f43e8f9 100755
> --- a/configure
> +++ b/configure
> @@ -404,8 +404,6 @@ elif check_define _ARCH_PPC ; then
>  elif check_define __mips__ ; then
>    if check_define __mips64 ; then
>      cpu="mips64"
> -  else
> -    cpu="mips"
>    fi
>  elif check_define __s390__ ; then
>    if check_define __s390x__ ; then
> @@ -473,11 +471,6 @@ case "$cpu" in
>      host_arch=mips
>      linux_arch=mips
>      ;;
> -  mips*)
> -    cpu=mips
> -    host_arch=mips
> -    linux_arch=mips
> -    ;;
>  
>    ppc)
>      host_arch=ppc
> -- 
> 2.51.0
> 

With regards,
Daniel
-- 
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Re: [PATCH v2 7/7] buildsys: Remove support for 32-bit MIPS hosts
Posted by Philippe Mathieu-Daudé 2 weeks, 3 days ago 
On 10/10/25 10:46, Daniel P. Berrangé wrote:
> On Thu, Oct 09, 2025 at 09:52:10PM +0200, Philippe Mathieu-Daudé wrote:
>> Stop detecting 32-bit MIPS host as supported, update the
>> deprecation document. See previous commit for rationale.
>>
>> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>> ---
>>   docs/about/deprecated.rst       | 13 +++++--------
>>   docs/about/removed-features.rst |  6 ++++++
>>   configure                       |  7 -------
>>   3 files changed, 11 insertions(+), 15 deletions(-)
>>
>> diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
>> index 67e527740c0..79cc34cfeb6 100644
>> --- a/docs/about/deprecated.rst
>> +++ b/docs/about/deprecated.rst
>> @@ -172,17 +172,14 @@ This argument has always been ignored.
>>   Host Architectures
>>   ------------------
>>   
>> -Big endian MIPS since 7.2; 32-bit little endian MIPS since 9.2, MIPS since 11.0
> 
> Did 'Big endian MIPS' refer to 32-bit, or both 32 & 64-bit ?  I'm guessing
> it was only 32-bit BE, given the heading of your removed-features.txt
> change.

Both.

* 7.2 deprecated:

   - 32-bit big endian MIPS host
   - 64-bit big endian MIPS host

   Not deprecated remaining:

   - 32-bit little endian MIPS host
   - 64-bit little endian MIPS host

* 9.2 deprecated:

   - 32-bit little endian MIPS host

   Not deprecated remaining:

   - 64-bit little endian MIPS host

* 11.0 deprecated:

   - 64-bit little endian MIPS host

   No non-deprecated MIPS host remaining

As of 11.0 we can remove what was deprecated previous 10.1.

> 
> But then did "MIPS since 11.0" refer to 64-bit little endian only, or
> both big & little endian for 64-bit ?
> 
> Given the wide variety of things all ambiguously called "MIPS",
> its worth being explicit....
> 
>> -'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
>> +MIPS (since 11.0)
>> +'''''''''''''''''
> 
> ...so if this is 64-bit MIPS, big & little endian, lets say so
I'll update to "64-bit little endian MIPS".

> 
>>   
>> -As Debian 10 ("Buster") moved into LTS the big endian 32 bit version of
>> -MIPS moved out of support making it hard to maintain our
>> -cross-compilation CI tests of the architecture. As we no longer have
>> -CI coverage support may bitrot away before the deprecation process
>> +MIPS is not supported by Debian 13 ("Trixie") and newer, making it hard to
>> +maintain our cross-compilation CI tests of the architecture. As we no longer
>> +have CI coverage support may bitrot away before the deprecation process
>>   completes.
>>   
>> -Likewise, MIPS is not supported by Debian 13 ("Trixie") and newer.
>> -
>>   System emulation on 32-bit x86 hosts (since 8.0)
>>   ''''''''''''''''''''''''''''''''''''''''''''''''
>>   
>> diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
>> index a5338e44c24..53829f59e65 100644
>> --- a/docs/about/removed-features.rst
>> +++ b/docs/about/removed-features.rst
>> @@ -896,6 +896,12 @@ work around the atomicity issues in system mode by running all vCPUs
>>   in a single thread context; in user mode atomicity was simply broken.
>>   From 10.0, QEMU has disabled configuration of 64-bit guests on 32-bit hosts.
>>   
>> +32-bit MIPS (since 11.0)
>> +''''''''''''''''''''''''
>> +
>> +Debian 12 "Bookworm" removed support for 32-bit MIPS, making it hard to
>> +maintain our cross-compilation CI tests of the architecture.
>> +
>>   Guest Emulator ISAs
>>   -------------------
Re: [PATCH v2 7/7] buildsys: Remove support for 32-bit MIPS hosts
Posted by Thomas Huth 2 weeks, 4 days ago 
On 09/10/2025 21.52, Philippe Mathieu-Daudé wrote:
> Stop detecting 32-bit MIPS host as supported, update the
> deprecation document. See previous commit for rationale.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   docs/about/deprecated.rst       | 13 +++++--------
>   docs/about/removed-features.rst |  6 ++++++
>   configure                       |  7 -------
>   3 files changed, 11 insertions(+), 15 deletions(-)
> 
> diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
> index 67e527740c0..79cc34cfeb6 100644
> --- a/docs/about/deprecated.rst
> +++ b/docs/about/deprecated.rst
> @@ -172,17 +172,14 @@ This argument has always been ignored.
>   Host Architectures
>   ------------------
>   
> -Big endian MIPS since 7.2; 32-bit little endian MIPS since 9.2, MIPS since 11.0
> -'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
> +MIPS (since 11.0)
> +'''''''''''''''''
>   
> -As Debian 10 ("Buster") moved into LTS the big endian 32 bit version of
> -MIPS moved out of support making it hard to maintain our
> -cross-compilation CI tests of the architecture. As we no longer have
> -CI coverage support may bitrot away before the deprecation process
> +MIPS is not supported by Debian 13 ("Trixie") and newer, making it hard to
> +maintain our cross-compilation CI tests of the architecture. As we no longer
> +have CI coverage support may bitrot away before the deprecation process
>   completes.
>   
> -Likewise, MIPS is not supported by Debian 13 ("Trixie") and newer.
> -
>   System emulation on 32-bit x86 hosts (since 8.0)
>   ''''''''''''''''''''''''''''''''''''''''''''''''
>   
> diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
> index a5338e44c24..53829f59e65 100644
> --- a/docs/about/removed-features.rst
> +++ b/docs/about/removed-features.rst
> @@ -896,6 +896,12 @@ work around the atomicity issues in system mode by running all vCPUs
>   in a single thread context; in user mode atomicity was simply broken.
>   From 10.0, QEMU has disabled configuration of 64-bit guests on 32-bit hosts.
>   
> +32-bit MIPS (since 11.0)
> +''''''''''''''''''''''''
> +
> +Debian 12 "Bookworm" removed support for 32-bit MIPS, making it hard to
> +maintain our cross-compilation CI tests of the architecture.
> +
>   Guest Emulator ISAs
>   -------------------
>   
> diff --git a/configure b/configure
> index 6a633ac2b16..8236f43e8f9 100755
> --- a/configure
> +++ b/configure
> @@ -404,8 +404,6 @@ elif check_define _ARCH_PPC ; then
>   elif check_define __mips__ ; then
>     if check_define __mips64 ; then
>       cpu="mips64"
> -  else
> -    cpu="mips"
>     fi
>   elif check_define __s390__ ; then
>     if check_define __s390x__ ; then
> @@ -473,11 +471,6 @@ case "$cpu" in
>       host_arch=mips
>       linux_arch=mips
>       ;;
> -  mips*)
> -    cpu=mips
> -    host_arch=mips
> -    linux_arch=mips
> -    ;;
>   
>     ppc)
>       host_arch=ppc

Reviewed-by: Thomas Huth <thuth@redhat.com>

Patchew 2.1-devel-b67e4c2

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