[PATCH 0/3] hw/xen: Build only once

[PATCH 0/3] hw/xen: Build only once

[Philippe Mathieu-Daudé]

Replace target-specific code to allow building
hw/xen/ files once.

Philippe Mathieu-Daudé (3):
  hw/xen: Use BITS_PER_BYTE & MAKE_64BIT_MASK() in req_size_bits()
  hw/xen: Replace target_ulong by agnostic target_long_bits()
  hw/xen: Build only once

 hw/xen/xen-hvm-common.c |  9 ++++++---
 hw/xen/meson.build      | 22 +++++++++-------------
 2 files changed, 15 insertions(+), 16 deletions(-)

-- 
2.51.0

[PATCH 1/3] hw/xen: Use BITS_PER_BYTE & MAKE_64BIT_MASK() in req_size_bits()

[Philippe Mathieu-Daudé]

Replace magic 8 by BITS_PER_BYTE, use MAKE_64BIT_MASK()
instead of open coding it.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/xen/xen-hvm-common.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hw/xen/xen-hvm-common.c b/hw/xen/xen-hvm-common.c
index 52e2cce397a..258014370e1 100644
--- a/hw/xen/xen-hvm-common.c
+++ b/hw/xen/xen-hvm-common.c
@@ -1,5 +1,6 @@
 #include "qemu/osdep.h"
 #include "qemu/units.h"
+#include "qemu/bitops.h"
 #include "qemu/error-report.h"
 #include "qapi/error.h"
 #include "exec/target_long.h"
@@ -448,12 +449,14 @@ static void cpu_ioreq_config(XenIOState *state, ioreq_t *req)
 
 static void handle_ioreq(XenIOState *state, ioreq_t *req)
 {
+    size_t req_size_bits = req->size * BITS_PER_BYTE;
+
     trace_handle_ioreq(req, req->type, req->dir, req->df, req->data_is_ptr,
                        req->addr, req->data, req->count, req->size);
 
     if (!req->data_is_ptr && (req->dir == IOREQ_WRITE) &&
             (req->size < sizeof (target_ulong))) {
-        req->data &= ((target_ulong) 1 << (8 * req->size)) - 1;
+        req->data &= MAKE_64BIT_MASK(0, req_size_bits);
     }
 
     if (req->dir == IOREQ_WRITE)
-- 
2.51.0

[PATCH 2/3] hw/xen: Replace target_ulong by agnostic target_long_bits()

[Philippe Mathieu-Daudé]

Both are equivalent:

  target_long_bits()

  sizeof(target_u?long) * BITS_PER_BYTE

Prefer the former which is target-agnostic.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/xen/xen-hvm-common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/xen/xen-hvm-common.c b/hw/xen/xen-hvm-common.c
index 258014370e1..b40ae0b3af0 100644
--- a/hw/xen/xen-hvm-common.c
+++ b/hw/xen/xen-hvm-common.c
@@ -2,8 +2,8 @@
 #include "qemu/units.h"
 #include "qemu/bitops.h"
 #include "qemu/error-report.h"
+#include "qemu/target-info.h"
 #include "qapi/error.h"
-#include "exec/target_long.h"
 #include "exec/target_page.h"
 #include "trace.h"
 
@@ -455,7 +455,7 @@ static void handle_ioreq(XenIOState *state, ioreq_t *req)
                        req->addr, req->data, req->count, req->size);
 
     if (!req->data_is_ptr && (req->dir == IOREQ_WRITE) &&
-            (req->size < sizeof (target_ulong))) {
+            (req_size_bits < target_long_bits())) {
         req->data &= MAKE_64BIT_MASK(0, req_size_bits);
     }
 
-- 
2.51.0

[PATCH 3/3] hw/xen: Build only once

[Philippe Mathieu-Daudé]

Now than hw/xen/ files don't use any target-specific code,
we can build all file units once, removing the need for the
xen_specific_ss[] source set.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/xen/meson.build | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

diff --git a/hw/xen/meson.build b/hw/xen/meson.build
index a1850e76988..dcd2b7e1df3 100644
--- a/hw/xen/meson.build
+++ b/hw/xen/meson.build
@@ -7,21 +7,16 @@ system_ss.add(when: ['CONFIG_XEN_BUS'], if_true: files(
   'xen_pvdev.c',
 ))
 
-system_ss.add(when: ['CONFIG_XEN', xen], if_true: files(
-  'xen-operations.c',
-),
-if_false: files(
-  'xen_stubs.c',
-))
-
-xen_specific_ss = ss.source_set()
-xen_specific_ss.add(files(
-  'xen-mapcache.c',
+xen_common_ss = ss.source_set()
+xen_common_ss.add(files(
   'xen-hvm-common.c',
+  'xen-mapcache.c',
+  'xen-operations.c',
   'xen-pvh-common.c',
 ))
+
 if have_xen_pci_passthrough
-  xen_specific_ss.add(files(
+  xen_common_ss.add(files(
     'xen-host-pci-device.c',
     'xen_pt.c',
     'xen_pt_config_init.c',
@@ -30,7 +25,8 @@ if have_xen_pci_passthrough
     'xen_pt_msi.c',
   ))
 else
-  xen_specific_ss.add(files('xen_pt_stub.c'))
+  xen_common_ss.add(files('xen_pt_stub.c'))
 endif
 
-specific_ss.add_all(when: ['CONFIG_XEN', xen], if_true: xen_specific_ss)
+system_ss.add_all(when: ['CONFIG_XEN', xen], if_true: xen_common_ss)
+system_ss.add(when: ['CONFIG_XEN', xen], if_false: files('xen_stubs.c'))
-- 
2.51.0

Re: [PATCH 0/3] hw/xen: Build only once

[Philippe Mathieu-Daudé]

On 22/10/25 16:01, Philippe Mathieu-Daudé wrote:
> Replace target-specific code to allow building
> hw/xen/ files once.
> 
> Philippe Mathieu-Daudé (3):
>    hw/xen: Use BITS_PER_BYTE & MAKE_64BIT_MASK() in req_size_bits()
>    hw/xen: Replace target_ulong by agnostic target_long_bits()
>    hw/xen: Build only once

ping?

Re: [PATCH 1/3] hw/xen: Use BITS_PER_BYTE & MAKE_64BIT_MASK() in req_size_bits()

[Pierrick Bouvier]

On 2025-10-22 16:01, Philippe Mathieu-Daudé wrote:
> Replace magic 8 by BITS_PER_BYTE, use MAKE_64BIT_MASK()
> instead of open coding it.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/xen/xen-hvm-common.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>

Re: [PATCH 2/3] hw/xen: Replace target_ulong by agnostic target_long_bits()

[Pierrick Bouvier]

On 2025-10-22 16:01, Philippe Mathieu-Daudé wrote:
> Both are equivalent:
> 
>    target_long_bits()
> 
>    sizeof(target_u?long) * BITS_PER_BYTE
> 
> Prefer the former which is target-agnostic.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/xen/xen-hvm-common.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>

Re: [PATCH 3/3] hw/xen: Build only once

[Pierrick Bouvier]

On 2025-10-22 16:01, Philippe Mathieu-Daudé wrote:
> Now than hw/xen/ files don't use any target-specific code,
> we can build all file units once, removing the need for the
> xen_specific_ss[] source set.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/xen/meson.build | 22 +++++++++-------------
>   1 file changed, 9 insertions(+), 13 deletions(-)
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>

Re: [PATCH 1/3] hw/xen: Use BITS_PER_BYTE & MAKE_64BIT_MASK() in req_size_bits()

[Edgar E. Iglesias]

On Wed, Oct 22, 2025 at 04:01:11PM +0200, Philippe Mathieu-Daudé wrote:
> Replace magic 8 by BITS_PER_BYTE, use MAKE_64BIT_MASK()
> instead of open coding it.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>



> ---
>  hw/xen/xen-hvm-common.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/xen/xen-hvm-common.c b/hw/xen/xen-hvm-common.c
> index 52e2cce397a..258014370e1 100644
> --- a/hw/xen/xen-hvm-common.c
> +++ b/hw/xen/xen-hvm-common.c
> @@ -1,5 +1,6 @@
>  #include "qemu/osdep.h"
>  #include "qemu/units.h"
> +#include "qemu/bitops.h"
>  #include "qemu/error-report.h"
>  #include "qapi/error.h"
>  #include "exec/target_long.h"
> @@ -448,12 +449,14 @@ static void cpu_ioreq_config(XenIOState *state, ioreq_t *req)
>  
>  static void handle_ioreq(XenIOState *state, ioreq_t *req)
>  {
> +    size_t req_size_bits = req->size * BITS_PER_BYTE;
> +
>      trace_handle_ioreq(req, req->type, req->dir, req->df, req->data_is_ptr,
>                         req->addr, req->data, req->count, req->size);
>  
>      if (!req->data_is_ptr && (req->dir == IOREQ_WRITE) &&
>              (req->size < sizeof (target_ulong))) {
> -        req->data &= ((target_ulong) 1 << (8 * req->size)) - 1;
> +        req->data &= MAKE_64BIT_MASK(0, req_size_bits);
>      }
>  
>      if (req->dir == IOREQ_WRITE)
> -- 
> 2.51.0
> 

Re: [PATCH 2/3] hw/xen: Replace target_ulong by agnostic target_long_bits()

[Edgar E. Iglesias]

On Wed, Oct 22, 2025 at 04:01:12PM +0200, Philippe Mathieu-Daudé wrote:
> Both are equivalent:
> 
>   target_long_bits()
> 
>   sizeof(target_u?long) * BITS_PER_BYTE
> 
> Prefer the former which is target-agnostic.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>



> ---
>  hw/xen/xen-hvm-common.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/xen/xen-hvm-common.c b/hw/xen/xen-hvm-common.c
> index 258014370e1..b40ae0b3af0 100644
> --- a/hw/xen/xen-hvm-common.c
> +++ b/hw/xen/xen-hvm-common.c
> @@ -2,8 +2,8 @@
>  #include "qemu/units.h"
>  #include "qemu/bitops.h"
>  #include "qemu/error-report.h"
> +#include "qemu/target-info.h"
>  #include "qapi/error.h"
> -#include "exec/target_long.h"
>  #include "exec/target_page.h"
>  #include "trace.h"
>  
> @@ -455,7 +455,7 @@ static void handle_ioreq(XenIOState *state, ioreq_t *req)
>                         req->addr, req->data, req->count, req->size);
>  
>      if (!req->data_is_ptr && (req->dir == IOREQ_WRITE) &&
> -            (req->size < sizeof (target_ulong))) {
> +            (req_size_bits < target_long_bits())) {
>          req->data &= MAKE_64BIT_MASK(0, req_size_bits);
>      }
>  
> -- 
> 2.51.0
> 

Re: [PATCH 3/3] hw/xen: Build only once

[Edgar E. Iglesias]

On Wed, Oct 22, 2025 at 04:01:13PM +0200, Philippe Mathieu-Daudé wrote:
> Now than hw/xen/ files don't use any target-specific code,
> we can build all file units once, removing the need for the
> xen_specific_ss[] source set.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>



> ---
>  hw/xen/meson.build | 22 +++++++++-------------
>  1 file changed, 9 insertions(+), 13 deletions(-)
> 
> diff --git a/hw/xen/meson.build b/hw/xen/meson.build
> index a1850e76988..dcd2b7e1df3 100644
> --- a/hw/xen/meson.build
> +++ b/hw/xen/meson.build
> @@ -7,21 +7,16 @@ system_ss.add(when: ['CONFIG_XEN_BUS'], if_true: files(
>    'xen_pvdev.c',
>  ))
>  
> -system_ss.add(when: ['CONFIG_XEN', xen], if_true: files(
> -  'xen-operations.c',
> -),
> -if_false: files(
> -  'xen_stubs.c',
> -))
> -
> -xen_specific_ss = ss.source_set()
> -xen_specific_ss.add(files(
> -  'xen-mapcache.c',
> +xen_common_ss = ss.source_set()
> +xen_common_ss.add(files(
>    'xen-hvm-common.c',
> +  'xen-mapcache.c',
> +  'xen-operations.c',
>    'xen-pvh-common.c',
>  ))
> +
>  if have_xen_pci_passthrough
> -  xen_specific_ss.add(files(
> +  xen_common_ss.add(files(
>      'xen-host-pci-device.c',
>      'xen_pt.c',
>      'xen_pt_config_init.c',
> @@ -30,7 +25,8 @@ if have_xen_pci_passthrough
>      'xen_pt_msi.c',
>    ))
>  else
> -  xen_specific_ss.add(files('xen_pt_stub.c'))
> +  xen_common_ss.add(files('xen_pt_stub.c'))
>  endif
>  
> -specific_ss.add_all(when: ['CONFIG_XEN', xen], if_true: xen_specific_ss)
> +system_ss.add_all(when: ['CONFIG_XEN', xen], if_true: xen_common_ss)
> +system_ss.add(when: ['CONFIG_XEN', xen], if_false: files('xen_stubs.c'))
> -- 
> 2.51.0
> 

Re: [PATCH 0/3] hw/xen: Build only once

[Philippe Mathieu-Daudé]

On 27/10/25 20:17, Philippe Mathieu-Daudé wrote:
> On 22/10/25 16:01, Philippe Mathieu-Daudé wrote:
>> Replace target-specific code to allow building
>> hw/xen/ files once.
>>
>> Philippe Mathieu-Daudé (3):
>>    hw/xen: Use BITS_PER_BYTE & MAKE_64BIT_MASK() in req_size_bits()
>>    hw/xen: Replace target_ulong by agnostic target_long_bits()
>>    hw/xen: Build only once
> 
> ping?

Series queued, thanks!