[XEN PATCH v2 3/7] x86: add deviation comments for asm-only functions

[Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>]

As stated in rules.rst, functions used only in asm code
are allowed to have no prior declaration visible when being
defined, hence these functions are deviated.
This also fixes violations of MISRA C:2012 Rule 8.4.

Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/arch/x86/hvm/svm/intr.c      | 1 +
 xen/arch/x86/hvm/svm/nestedsvm.c | 1 +
 xen/arch/x86/hvm/svm/svm.c       | 2 ++
 xen/arch/x86/traps.c             | 1 +
 xen/arch/x86/x86_64/traps.c      | 1 +
 5 files changed, 6 insertions(+)

diff --git a/xen/arch/x86/hvm/svm/intr.c b/xen/arch/x86/hvm/svm/intr.c
index 192e17ebbfbb..bd9dc560bbc6 100644
--- a/xen/arch/x86/hvm/svm/intr.c
+++ b/xen/arch/x86/hvm/svm/intr.c
@@ -123,6 +123,7 @@ static void svm_enable_intr_window(struct vcpu *v, struct 
hvm_intack intack)
         vmcb, general1_intercepts | GENERAL1_INTERCEPT_VINTR);
 }

+/* SAF-1-safe */
 void svm_intr_assist(void)
 {
     struct vcpu *v = current;
diff --git a/xen/arch/x86/hvm/svm/nestedsvm.c b/xen/arch/x86/hvm/svm/nestedsvm.c
index a09b6abaaeaf..c80d59e0728e 100644
--- a/xen/arch/x86/hvm/svm/nestedsvm.c
+++ b/xen/arch/x86/hvm/svm/nestedsvm.c
@@ -1441,6 +1441,7 @@ nestedsvm_vcpu_vmexit(struct vcpu *v, struct 
cpu_user_regs *regs,
 }

 /* VCPU switch */
+/* SAF-1-safe */
 void nsvm_vcpu_switch(void)
 {
     struct cpu_user_regs *regs = guest_cpu_user_regs();
diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
index beb076ea8d62..b9fabd45a119 100644
--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -1044,6 +1044,7 @@ static void noreturn cf_check svm_do_resume(void)
     reset_stack_and_jump(svm_asm_do_resume);
 }

+/* SAF-1-safe */
 void svm_vmenter_helper(void)
 {
     const struct cpu_user_regs *regs = guest_cpu_user_regs();
@@ -2574,6 +2575,7 @@ const struct hvm_function_table * __init start_svm(void)
     return &svm_function_table;
 }

+/* SAF-1-safe */
 void svm_vmexit_handler(void)
 {
     struct cpu_user_regs *regs = guest_cpu_user_regs();
diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index 0a005f088bca..f27ddb728b2c 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -2260,6 +2260,7 @@ void asm_domain_crash_synchronous(unsigned long addr)
 }

 #ifdef CONFIG_DEBUG
+/* SAF-1-safe */
 void check_ist_exit(const struct cpu_user_regs *regs, bool ist_exit)
 {
     const unsigned int ist_mask =
diff --git a/xen/arch/x86/x86_64/traps.c b/xen/arch/x86/x86_64/traps.c
index e03e80813e36..5963d26d7848 100644
--- a/xen/arch/x86/x86_64/traps.c
+++ b/xen/arch/x86/x86_64/traps.c
@@ -266,6 +266,7 @@ void show_page_walk(unsigned long addr)
            l1_table_offset(addr), l1e_get_intpte(l1e), pfn);
 }

+/* SAF-1-safe */
 void do_double_fault(struct cpu_user_regs *regs)
 {
     unsigned int cpu;
--
2.34.1