[xen staging] xen/domain.h: Centrialize is_domain_direct_mapped()

[patchbot@xxxxxxx]

commit 698c35184cfd3c045b96b6c587c9f37f8c47408f
Author:     Henry Wang <xin.wang2@xxxxxxx>
AuthorDate: Mon Mar 11 09:32:03 2024 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Mar 11 09:32:03 2024 +0100

    xen/domain.h: Centrialize is_domain_direct_mapped()
    
    Currently direct mapped domain is only supported by the Arm
    architecture at the domain creation time by setting the CDF_directmap
    flag. There is not a need for every non-Arm architecture, i.e. x86,
    RISC-V and PPC, to define a stub is_domain_direct_mapped() in arch
    header.
    
    Move is_domain_direct_mapped() to a centralized place at xen/domain.h
    and evaluate CDF_directmap for non-Arm architecture to 0.
    
    Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>
    Signed-off-by: Henry Wang <xin.wang2@xxxxxxx>
    Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/arm/include/asm/domain.h   | 2 --
 xen/arch/ppc/include/asm/domain.h   | 2 --
 xen/arch/riscv/include/asm/domain.h | 2 --
 xen/arch/x86/include/asm/domain.h   | 1 -
 xen/include/xen/domain.h            | 3 +++
 5 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/xen/arch/arm/include/asm/domain.h 
b/xen/arch/arm/include/asm/domain.h
index 8218afb862..f1d72c6e48 100644
--- a/xen/arch/arm/include/asm/domain.h
+++ b/xen/arch/arm/include/asm/domain.h
@@ -29,8 +29,6 @@ enum domain_type {
 #define is_64bit_domain(d) (0)
 #endif
 
-#define is_domain_direct_mapped(d) ((d)->cdf & CDF_directmap)
-
 /*
  * Is the domain using the host memory layout?
  *
diff --git a/xen/arch/ppc/include/asm/domain.h 
b/xen/arch/ppc/include/asm/domain.h
index 573276d0a8..3a447272c6 100644
--- a/xen/arch/ppc/include/asm/domain.h
+++ b/xen/arch/ppc/include/asm/domain.h
@@ -10,8 +10,6 @@ struct hvm_domain
     uint64_t              params[HVM_NR_PARAMS];
 };
 
-#define is_domain_direct_mapped(d) ((void)(d), 0)
-
 /* TODO: Implement */
 #define guest_mode(r) ({ (void)(r); BUG_ON("unimplemented"); 0; })
 
diff --git a/xen/arch/riscv/include/asm/domain.h 
b/xen/arch/riscv/include/asm/domain.h
index 0f5dc2be40..027bfa8a93 100644
--- a/xen/arch/riscv/include/asm/domain.h
+++ b/xen/arch/riscv/include/asm/domain.h
@@ -10,8 +10,6 @@ struct hvm_domain
     uint64_t              params[HVM_NR_PARAMS];
 };
 
-#define is_domain_direct_mapped(d) ((void)(d), 0)
-
 struct arch_vcpu_io {
 };
 
diff --git a/xen/arch/x86/include/asm/domain.h 
b/xen/arch/x86/include/asm/domain.h
index 622d22bef2..4bd78e3a6d 100644
--- a/xen/arch/x86/include/asm/domain.h
+++ b/xen/arch/x86/include/asm/domain.h
@@ -22,7 +22,6 @@
 #define is_hvm_pv_evtchn_domain(d) (is_hvm_domain(d) && \
         ((d)->arch.hvm.irq->callback_via_type == HVMIRQ_callback_vector || \
          (d)->vcpu[0]->arch.hvm.evtchn_upcall_vector))
-#define is_domain_direct_mapped(d) ((void)(d), 0)
 
 #define VCPU_TRAP_NONE         0
 #define VCPU_TRAP_NMI          1
diff --git a/xen/include/xen/domain.h b/xen/include/xen/domain.h
index b1a4aa6f38..3de5635291 100644
--- a/xen/include/xen/domain.h
+++ b/xen/include/xen/domain.h
@@ -41,6 +41,8 @@ void arch_get_domain_info(const struct domain *d,
 #ifdef CONFIG_ARM
 /* Should domain memory be directly mapped? */
 #define CDF_directmap            (1U << 1)
+#else
+#define CDF_directmap            0
 #endif
 /* Is domain memory on static allocation? */
 #ifdef CONFIG_STATIC_MEMORY
@@ -49,6 +51,7 @@ void arch_get_domain_info(const struct domain *d,
 #define CDF_staticmem            0
 #endif
 
+#define is_domain_direct_mapped(d) ((d)->cdf & CDF_directmap)
 #define is_domain_using_staticmem(d) ((d)->cdf & CDF_staticmem)
 
 /*
--
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