[xen staging] xen/mm: add generic domain_clamp_alloc_bitsize() macro

[patchbot@xxxxxxx]

commit ebed501734e53e8dec1293b708accddba94b8439
Author:     Grygorii Strashko <grygorii_strashko@xxxxxxxx>
AuthorDate: Mon Dec 8 15:53:09 2025 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Dec 8 15:53:09 2025 +0100

    xen/mm: add generic domain_clamp_alloc_bitsize() macro
    
    Add generic domain_clamp_alloc_bitsize() macro and clean up arch specific
    defines.
    
    Signed-off-by: Grygorii Strashko <grygorii_strashko@xxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Luca Fancellu <luca.fancellu@xxxxxxx> #arm
    Reviewed-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
    Acked-by: Michal Orzel <michal.orzel@xxxxxxx>
---
 xen/arch/arm/include/asm/mm.h   | 2 --
 xen/arch/ppc/include/asm/mm.h   | 2 --
 xen/arch/riscv/include/asm/mm.h | 2 --
 xen/arch/x86/include/asm/mm.h   | 1 +
 xen/include/xen/mm.h            | 4 ++++
 5 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/xen/arch/arm/include/asm/mm.h b/xen/arch/arm/include/asm/mm.h
index 4c6cc64aa7..ec2d2dc537 100644
--- a/xen/arch/arm/include/asm/mm.h
+++ b/xen/arch/arm/include/asm/mm.h
@@ -313,8 +313,6 @@ struct page_info *get_page_from_gva(struct vcpu *v, vaddr_t 
va,
 /* Arch-specific portion of memory_op hypercall. */
 long arch_memory_op(int op, XEN_GUEST_HANDLE_PARAM(void) arg);
 
-#define domain_clamp_alloc_bitsize(d, b) (b)
-
 unsigned long domain_get_maximum_gpfn(struct domain *d);
 
 /* Release all __init and __initdata ranges to be reused */
diff --git a/xen/arch/ppc/include/asm/mm.h b/xen/arch/ppc/include/asm/mm.h
index e478291fdf..91c405876b 100644
--- a/xen/arch/ppc/include/asm/mm.h
+++ b/xen/arch/ppc/include/asm/mm.h
@@ -96,8 +96,6 @@ static inline struct page_info *virt_to_page(const void *v)
 /* TODO: implement */
 #define mfn_valid(mfn) ({ (void) (mfn); 0; })
 
-#define domain_clamp_alloc_bitsize(d, b) (b)
-
 #define PFN_ORDER(pfn_) ((pfn_)->v.free.order)
 
 struct page_info
diff --git a/xen/arch/riscv/include/asm/mm.h b/xen/arch/riscv/include/asm/mm.h
index 11e9f26bf0..e5ea91fa4d 100644
--- a/xen/arch/riscv/include/asm/mm.h
+++ b/xen/arch/riscv/include/asm/mm.h
@@ -292,8 +292,6 @@ static inline bool arch_mfns_in_directmap(unsigned long 
mfn, unsigned long nr)
 /* TODO: implement */
 #define mfn_valid(mfn) ({ (void)(mfn); 0; })
 
-#define domain_clamp_alloc_bitsize(d, b) ((void)(d), (b))
-
 #define PFN_ORDER(pg) ((pg)->v.free.order)
 
 extern unsigned char cpu0_boot_stack[];
diff --git a/xen/arch/x86/include/asm/mm.h b/xen/arch/x86/include/asm/mm.h
index 08153e6d6f..17ca6666a3 100644
--- a/xen/arch/x86/include/asm/mm.h
+++ b/xen/arch/x86/include/asm/mm.h
@@ -621,6 +621,7 @@ extern int memory_add(unsigned long spfn, unsigned long 
epfn, unsigned int pxm);
 
 void domain_set_alloc_bitsize(struct domain *d);
 unsigned int domain_clamp_alloc_bitsize(struct domain *d, unsigned int bits);
+#define domain_clamp_alloc_bitsize(d, bits) domain_clamp_alloc_bitsize(d, bits)
 
 unsigned long domain_get_maximum_gpfn(struct domain *d);
 
diff --git a/xen/include/xen/mm.h b/xen/include/xen/mm.h
index b968f47b87..426362adb2 100644
--- a/xen/include/xen/mm.h
+++ b/xen/include/xen/mm.h
@@ -641,4 +641,8 @@ static inline void put_page_alloc_ref(struct page_info 
*page)
     }
 }
 
+#ifndef domain_clamp_alloc_bitsize
+#define domain_clamp_alloc_bitsize(d, bits) ((void)(d), (bits))
+#endif
+
 #endif /* __XEN_MM_H__ */
--
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