[PATCH 06/10 v2] xen/arm: vpl011: Add vuart ring-buf and evtchn to xenstore

From: Bhupinder Thakur <bhupinder.thakur@linaro.org>
To: xen-devel@lists.xenproject.org
Cc: Stefano Stabellini <sstabellini@kernel.org>,
	Wei Liu <wei.liu2@citrix.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Ian Jackson <ian.jackson@eu.citrix.com>,
	Julien Grall <julien.grall@arm.com>,
	Jan Beulich <jbeulich@suse.com>
Subject: [PATCH 06/10 v2] xen/arm: vpl011: Add vuart ring-buf and evtchn to xenstore
Date: Fri, 28 Apr 2017 21:31:20 +0530	[thread overview]
Message-ID: <1493395284-18430-7-git-send-email-bhupinder.thakur@linaro.org> (raw)
In-Reply-To: <1493395284-18430-1-git-send-email-bhupinder.thakur@linaro.org>

Add two new parameters to the xen store to be used by xenconsoled:
    - newly allocated PFN to be used as IN/OUT ring buffer
    - get a new event channel allocated by Xen using a domctl call

These paramters are added to xenstore only if vuart console is enabled
by the user.

Signed-off-by: Bhupinder Thakur <bhupinder.thakur@linaro.org>
---

Changes since v1:
- Modified the xenstore key names to /vuart/0/ring-ref and 
  /vuart/0/port.
- Replaced the hvm call with domctl call to get the event channel.

 tools/libxl/libxl_console.c | 10 ++++++++++
 tools/libxl/libxl_dom.c     |  4 ++++
 2 files changed, 14 insertions(+)

diff --git a/tools/libxl/libxl_console.c b/tools/libxl/libxl_console.c
index 446e766..ef3bd44 100644
--- a/tools/libxl/libxl_console.c
+++ b/tools/libxl/libxl_console.c
@@ -67,6 +67,9 @@ int libxl_console_exec(libxl_ctx *ctx, uint32_t domid, int cons_num,
     case LIBXL_CONSOLE_TYPE_SERIAL:
         cons_type_s = "serial";
         break;
+    case LIBXL_CONSOLE_TYPE_VUART:
+        cons_type_s = "vuart";
+        break;
     default:
         goto out;
     }
@@ -326,6 +329,13 @@ int libxl__device_console_add(libxl__gc *gc, uint32_t domid,
         flexarray_append(ro_front, GCSPRINTF("%"PRIu32, state->console_port));
         flexarray_append(ro_front, "ring-ref");
         flexarray_append(ro_front, GCSPRINTF("%lu", state->console_mfn));
+        if (state->vuart_enabled)
+        {
+            flexarray_append(ro_front, "vuart/0/port");
+            flexarray_append(ro_front, GCSPRINTF("%"PRIu32, state->vuart_port));
+            flexarray_append(ro_front, "vuart/0/ring-ref");
+            flexarray_append(ro_front, GCSPRINTF("%lu", state->vuart_mfn));
+        }
     } else {
         flexarray_append(front, "state");
         flexarray_append(front, GCSPRINTF("%d", XenbusStateInitialising));
diff --git a/tools/libxl/libxl_dom.c b/tools/libxl/libxl_dom.c
index 5d914a5..06ff3b7 100644
--- a/tools/libxl/libxl_dom.c
+++ b/tools/libxl/libxl_dom.c
@@ -434,6 +434,9 @@ int libxl__build_pre(libxl__gc *gc, uint32_t domid,
     state->store_port = xc_evtchn_alloc_unbound(ctx->xch, domid, state->store_domid);
     state->console_port = xc_evtchn_alloc_unbound(ctx->xch, domid, state->console_domid);
 
+    if (state->vuart_enabled)
+        xc_domain_vuart_get_evtchn(ctx->xch, domid, &state->vuart_port);
+
     if (info->type == LIBXL_DOMAIN_TYPE_HVM) {
         hvm_set_conf_params(ctx->xch, domid, info);
 #if defined(__i386__) || defined(__x86_64__)
@@ -788,6 +791,7 @@ int libxl__build_pv(libxl__gc *gc, uint32_t domid,
     if (xc_dom_translated(dom)) {
         state->console_mfn = dom->console_pfn;
         state->store_mfn = dom->xenstore_pfn;
+        state->vuart_mfn = dom->vuart_pfn;
     } else {
         state->console_mfn = xc_dom_p2m(dom, dom->console_pfn);
         state->store_mfn = xc_dom_p2m(dom, dom->xenstore_pfn);
-- 
2.7.4


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