Add XEN_DOMCTL_param to get/set generic numeric parameters for a domain.
This should reduce the number of specialized domctls that need to be
added.
Signed-off-by: David Vrabel
---
xen/arch/x86/domctl.c | 14 ++
xen/common/domctl.c | 11 +++
xen/include/public/domctl.h | 21 +
xen/include/xen/domain.h| 3 +++
4 files changed, 49 insertions(+)
diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c
index 55aecdc..3a3ebbf 100644
--- a/xen/arch/x86/domctl.c
+++ b/xen/arch/x86/domctl.c
@@ -1408,6 +1408,20 @@ void arch_get_info_guest(struct vcpu *v,
vcpu_guest_context_u c)
#undef c
}
+int arch_domctl_param(struct domain *d, uint32_t param, bool_t set,
+ uint64_t *value)
+{
+uint64_t new_value = *value;
+
+switch ( param )
+{
+default:
+return -EINVAL;
+}
+
+return 0;
+}
+
/*
* Local variables:
* mode: C
diff --git a/xen/common/domctl.c b/xen/common/domctl.c
index 22fa5d5..54c51ba 100644
--- a/xen/common/domctl.c
+++ b/xen/common/domctl.c
@@ -1186,6 +1186,17 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t)
u_domctl)
copyback = 1;
break;
+case XEN_DOMCTL_param:
+{
+uint32_t param = op->u.param.param & ~XEN_DOMCTL_PARAM_SET;
+bool_t set = !!(op->u.param.param & XEN_DOMCTL_PARAM_SET);
+
+ret = arch_domctl_param(d, param, set, &op->u.param.value);
+if ( ret == 0 )
+copyback = 1;
+break;
+}
+
default:
ret = arch_do_domctl(op, d, u_domctl);
break;
diff --git a/xen/include/public/domctl.h b/xen/include/public/domctl.h
index a934318..330b3e7 100644
--- a/xen/include/public/domctl.h
+++ b/xen/include/public/domctl.h
@@ -1092,6 +1092,25 @@ struct xen_domctl_psr_cat_op {
typedef struct xen_domctl_psr_cat_op xen_domctl_psr_cat_op_t;
DEFINE_XEN_GUEST_HANDLE(xen_domctl_psr_cat_op_t);
+/*
+ * Get/set a per-domain numeric parameter.
+ *
+ * If bit 31 of @param is set, the original value is returned and the
+ * new value is written. If bit 31 is clear, the value is returned.
+ *
+ * Not all parameters are valid for all architectures or domain types.
+ */
+#define XEN_DOMCTL_PARAM_SET (1u << 31)
+
+struct xen_domctl_param {
+/* IN */
+uint32_t param;
+/* IN/OUT */
+uint64_t value;
+};
+typedef struct xen_domctl_param xen_domctl_param;
+DEFINE_XEN_GUEST_HANDLE(xen_domctl_param);
+
struct xen_domctl {
uint32_t cmd;
#define XEN_DOMCTL_createdomain 1
@@ -1169,6 +1188,7 @@ struct xen_domctl {
#define XEN_DOMCTL_monitor_op77
#define XEN_DOMCTL_psr_cat_op78
#define XEN_DOMCTL_soft_reset79
+#define XEN_DOMCTL_param 80
#define XEN_DOMCTL_gdbsx_guestmemio1000
#define XEN_DOMCTL_gdbsx_pausevcpu 1001
#define XEN_DOMCTL_gdbsx_unpausevcpu 1002
@@ -1231,6 +1251,7 @@ struct xen_domctl {
struct xen_domctl_psr_cmt_oppsr_cmt_op;
struct xen_domctl_monitor_opmonitor_op;
struct xen_domctl_psr_cat_oppsr_cat_op;
+struct xen_domctl_param param;
uint8_t pad[128];
} u;
};
diff --git a/xen/include/xen/domain.h b/xen/include/xen/domain.h
index a1a6f25..a8a6d7d 100644
--- a/xen/include/xen/domain.h
+++ b/xen/include/xen/domain.h
@@ -77,6 +77,9 @@ void arch_dump_domain_info(struct domain *d);
int arch_vcpu_reset(struct vcpu *);
+int arch_domctl_param(struct domain *d, uint32_t param, bool_t set,
+ uint64_t *value);
+
extern spinlock_t vcpu_alloc_lock;
bool_t domctl_lock_acquire(void);
void domctl_lock_release(void);
--
2.1.4
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