[PATCH v5 04/11] common: add vmtrace_pt_size domain parameter

[Michał Leszczyński <michal.leszczynski@xxxxxxx>]

From: Michal Leszczynski <michal.leszczynski@xxxxxxx>

Add vmtrace_pt_size domain parameter in live domain and
vmtrace_pt_order parameter in xen_domctl_createdomain.

Signed-off-by: Michal Leszczynski <michal.leszczynski@xxxxxxx>
---
 xen/common/domain.c         | 12 ++++++++++++
 xen/include/public/domctl.h |  1 +
 xen/include/xen/sched.h     |  4 ++++
 3 files changed, 17 insertions(+)

diff --git a/xen/common/domain.c b/xen/common/domain.c
index a45cf023f7..25d3359c5b 100644
--- a/xen/common/domain.c
+++ b/xen/common/domain.c
@@ -338,6 +338,12 @@ static int sanitise_domain_config(struct 
xen_domctl_createdomain *config)
         return -EINVAL;
     }
 
+    if ( config->vmtrace_pt_order && !vmtrace_supported )
+    {
+        dprintk(XENLOG_INFO, "Processor tracing is not supported\n");
+        return -EINVAL;
+    }
+
     return arch_sanitise_domain_config(config);
 }
 
@@ -443,6 +449,12 @@ struct domain *domain_create(domid_t domid,
         d->nr_pirqs = min(d->nr_pirqs, nr_irqs);
 
         radix_tree_init(&d->pirq_tree);
+
+        if ( config->vmtrace_pt_order )
+        {
+            uint32_t shift_val = config->vmtrace_pt_order + PAGE_SHIFT;
+            d->vmtrace_pt_size = (1ULL << shift_val);
+        }
     }
 
     if ( (err = arch_domain_create(d, config)) != 0 )
diff --git a/xen/include/public/domctl.h b/xen/include/public/domctl.h
index 59bdc28c89..7b8289d436 100644
--- a/xen/include/public/domctl.h
+++ b/xen/include/public/domctl.h
@@ -92,6 +92,7 @@ struct xen_domctl_createdomain {
     uint32_t max_evtchn_port;
     int32_t max_grant_frames;
     int32_t max_maptrack_frames;
+    uint8_t vmtrace_pt_order;
 
     struct xen_arch_domainconfig arch;
 };
diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
index ac53519d7f..48f0a61bbd 100644
--- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -457,6 +457,10 @@ struct domain
     unsigned    pbuf_idx;
     spinlock_t  pbuf_lock;
 
+    /* Used by vmtrace features */
+    spinlock_t  vmtrace_lock;
+    uint64_t    vmtrace_pt_size;
+
     /* OProfile support. */
     struct xenoprof *xenoprof;
 
-- 
2.17.1