[xen staging] xen/sysctl: wrap around XEN_SYSCTL_page_offline_op

[patchbot@xxxxxxx]

commit 9ca99150a1c85640a59a044534d629c64472eb94
Author:     Penny Zheng <Penny.Zheng@xxxxxxx>
AuthorDate: Fri Jul 11 12:31:54 2025 +0800
Commit:     Stefano Stabellini <stefano.stabellini@xxxxxxx>
CommitDate: Wed Jul 16 17:36:36 2025 -0700

    xen/sysctl: wrap around XEN_SYSCTL_page_offline_op
    
    The following functions are only to deal with XEN_SYSCTL_page_offline_op,
    then shall be wrapped:
    - xsm_page_offline()
    - online_page()
    - query_page_offline()
    
    Signed-off-by: Penny Zheng <Penny.Zheng@xxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
    Acked-by: Daniel P. Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
---
 xen/common/page_alloc.c | 2 ++
 xen/include/xsm/xsm.h   | 6 ++++++
 xen/xsm/dummy.c         | 2 ++
 xen/xsm/flask/hooks.c   | 6 ++++++
 4 files changed, 16 insertions(+)

diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c
index 8f93a4c354..8177d12f50 100644
--- a/xen/common/page_alloc.c
+++ b/xen/common/page_alloc.c
@@ -1781,6 +1781,7 @@ int offline_page(mfn_t mfn, int broken, uint32_t *status)
     return 0;
 }
 
+#ifdef CONFIG_SYSCTL
 /*
  * Online the memory.
  *   The caller should make sure end_pfn <= max_page,
@@ -1865,6 +1866,7 @@ int query_page_offline(mfn_t mfn, uint32_t *status)
 
     return 0;
 }
+#endif /* CONFIG_SYSCTL */
 
 /*
  * This function should only be called with valid pages from the same NUMA
diff --git a/xen/include/xsm/xsm.h b/xen/include/xsm/xsm.h
index 042a99449f..5ac99904c4 100644
--- a/xen/include/xsm/xsm.h
+++ b/xen/include/xsm/xsm.h
@@ -138,7 +138,9 @@ struct xsm_ops {
     int (*resource_setup_gsi)(int gsi);
     int (*resource_setup_misc)(void);
 
+#ifdef CONFIG_SYSCTL
     int (*page_offline)(uint32_t cmd);
+#endif
     int (*hypfs_op)(void);
 
     long (*do_xsm_op)(XEN_GUEST_HANDLE_PARAM(void) op);
@@ -597,7 +599,11 @@ static inline int xsm_resource_setup_misc(xsm_default_t 
def)
 
 static inline int xsm_page_offline(xsm_default_t def, uint32_t cmd)
 {
+#ifdef CONFIG_SYSCTL
     return alternative_call(xsm_ops.page_offline, cmd);
+#else
+    return -EOPNOTSUPP;
+#endif
 }
 
 static inline int xsm_hypfs_op(xsm_default_t def)
diff --git a/xen/xsm/dummy.c b/xen/xsm/dummy.c
index cd0e844fcf..d46413ad8c 100644
--- a/xen/xsm/dummy.c
+++ b/xen/xsm/dummy.c
@@ -96,7 +96,9 @@ static const struct xsm_ops __initconst_cf_clobber dummy_ops 
= {
     .resource_setup_gsi            = xsm_resource_setup_gsi,
     .resource_setup_misc           = xsm_resource_setup_misc,
 
+#ifdef CONFIG_SYSCTL
     .page_offline                  = xsm_page_offline,
+#endif
     .hypfs_op                      = xsm_hypfs_op,
     .hvm_param                     = xsm_hvm_param,
     .hvm_param_altp2mhvm           = xsm_hvm_param_altp2mhvm,
diff --git a/xen/xsm/flask/hooks.c b/xen/xsm/flask/hooks.c
index df7e10775b..45c12aa662 100644
--- a/xen/xsm/flask/hooks.c
+++ b/xen/xsm/flask/hooks.c
@@ -1206,10 +1206,12 @@ static int cf_check flask_resource_unplug_core(void)
     return avc_current_has_perm(SECINITSID_DOMXEN, SECCLASS_RESOURCE, 
RESOURCE__UNPLUG, NULL);
 }
 
+#ifdef CONFIG_SYSCTL
 static int flask_resource_use_core(void)
 {
     return avc_current_has_perm(SECINITSID_DOMXEN, SECCLASS_RESOURCE, 
RESOURCE__USE, NULL);
 }
+#endif /* CONFIG_SYSCTL */
 
 static int cf_check flask_resource_plug_pci(uint32_t machine_bdf)
 {
@@ -1274,6 +1276,7 @@ static int cf_check flask_resource_setup_misc(void)
     return avc_current_has_perm(SECINITSID_XEN, SECCLASS_RESOURCE, 
RESOURCE__SETUP, NULL);
 }
 
+#ifdef CONFIG_SYSCTL
 static inline int cf_check flask_page_offline(uint32_t cmd)
 {
     switch ( cmd )
@@ -1288,6 +1291,7 @@ static inline int cf_check flask_page_offline(uint32_t 
cmd)
         return avc_unknown_permission("page_offline", cmd);
     }
 }
+#endif /* CONFIG_SYSCTL */
 
 static inline int cf_check flask_hypfs_op(void)
 {
@@ -1948,7 +1952,9 @@ static const struct xsm_ops __initconst_cf_clobber 
flask_ops = {
     .resource_setup_gsi = flask_resource_setup_gsi,
     .resource_setup_misc = flask_resource_setup_misc,
 
+#ifdef CONFIG_SYSCTL
     .page_offline = flask_page_offline,
+#endif
     .hypfs_op = flask_hypfs_op,
     .hvm_param = flask_hvm_param,
     .hvm_param_altp2mhvm = flask_hvm_param_altp2mhvm,
--
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