[Xen-devel] [PATCH v3 5/5] xen/arm: Limit the scope of cpregs.h

[Julien Grall <julien.grall@xxxxxxx>]

Currently, cpregs.h is indirectly included every files of the hypervisor even
for arm64. However, the only use for arm64 is when emulating co-processors.

For arm32, all users of processor.h expect cpregs.h to be included in
order to access co-processors. So move the inclusion in
asm-arm/arm32/processor.h.

cpregs.h will also be directly included in the co-processors emulation
to accommodate arm64.

This is drastically reducing the exposure of cpregs.h to any source file
on arm64.

Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>

---
    Changes in v3:
        - Expand the rationale about this patch
        - Add Stefano's acked-by

    Changes in v2:
        - Update commit message
---
 xen/arch/arm/smp.c                    | 1 -
 xen/arch/arm/vcpreg.c                 | 1 +
 xen/arch/arm/vgic-v3.c                | 1 +
 xen/arch/arm/vtimer.c                 | 2 ++
 xen/include/asm-arm/arm32/processor.h | 2 ++
 xen/include/asm-arm/percpu.h          | 1 -
 xen/include/asm-arm/processor.h       | 1 -
 7 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/xen/arch/arm/smp.c b/xen/arch/arm/smp.c
index e7df0874d6..554f4992e6 100644
--- a/xen/arch/arm/smp.c
+++ b/xen/arch/arm/smp.c
@@ -1,6 +1,5 @@
 #include <asm/system.h>
 #include <asm/smp.h>
-#include <asm/cpregs.h>
 #include <asm/page.h>
 #include <asm/gic.h>
 #include <asm/flushtlb.h>
diff --git a/xen/arch/arm/vcpreg.c b/xen/arch/arm/vcpreg.c
index f3b08403fb..e363183ba8 100644
--- a/xen/arch/arm/vcpreg.c
+++ b/xen/arch/arm/vcpreg.c
@@ -18,6 +18,7 @@
 
 #include <xen/sched.h>
 
+#include <asm/cpregs.h>
 #include <asm/current.h>
 #include <asm/regs.h>
 #include <asm/traps.h>
diff --git a/xen/arch/arm/vgic-v3.c b/xen/arch/arm/vgic-v3.c
index cbeac28b28..a0cf993d13 100644
--- a/xen/arch/arm/vgic-v3.c
+++ b/xen/arch/arm/vgic-v3.c
@@ -26,6 +26,7 @@
 #include <xen/softirq.h>
 #include <xen/sizes.h>
 
+#include <asm/cpregs.h>
 #include <asm/current.h>
 #include <asm/gic_v3_defs.h>
 #include <asm/gic_v3_its.h>
diff --git a/xen/arch/arm/vtimer.c b/xen/arch/arm/vtimer.c
index 9c7e8f441c..0460962f08 100644
--- a/xen/arch/arm/vtimer.c
+++ b/xen/arch/arm/vtimer.c
@@ -22,6 +22,7 @@
 #include <xen/sched.h>
 #include <xen/timer.h>
 
+#include <asm/cpregs.h>
 #include <asm/div64.h>
 #include <asm/gic.h>
 #include <asm/irq.h>
@@ -29,6 +30,7 @@
 #include <asm/time.h>
 #include <asm/vgic.h>
 #include <asm/vreg.h>
+#include <asm/regs.h>
 
 /*
  * Check if regs is allowed access, user_gate is tail end of a
diff --git a/xen/include/asm-arm/arm32/processor.h 
b/xen/include/asm-arm/arm32/processor.h
index 68cc82147e..fb330812af 100644
--- a/xen/include/asm-arm/arm32/processor.h
+++ b/xen/include/asm-arm/arm32/processor.h
@@ -1,6 +1,8 @@
 #ifndef __ASM_ARM_ARM32_PROCESSOR_H
 #define __ASM_ARM_ARM32_PROCESSOR_H
 
+#include <asm/cpregs.h>
+
 #define ACTLR_CAXX_SMP      (1<<6)
 
 #ifndef __ASSEMBLY__
diff --git a/xen/include/asm-arm/percpu.h b/xen/include/asm-arm/percpu.h
index 7968532462..cdf64e0f77 100644
--- a/xen/include/asm-arm/percpu.h
+++ b/xen/include/asm-arm/percpu.h
@@ -4,7 +4,6 @@
 #ifndef __ASSEMBLY__
 
 #include <xen/types.h>
-#include <asm/cpregs.h>
 #if defined(CONFIG_ARM_32)
 # include <asm/arm32/processor.h>
 #elif defined(CONFIG_ARM_64)
diff --git a/xen/include/asm-arm/processor.h b/xen/include/asm-arm/processor.h
index d791c12c9c..cd45e5f48f 100644
--- a/xen/include/asm-arm/processor.h
+++ b/xen/include/asm-arm/processor.h
@@ -1,7 +1,6 @@
 #ifndef __ASM_ARM_PROCESSOR_H
 #define __ASM_ARM_PROCESSOR_H
 
-#include <asm/cpregs.h>
 #ifndef __ASSEMBLY__
 #include <xen/types.h>
 #endif
-- 
2.11.0


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