xen/common: add dom0 xen command line argument for Arm

Currently x86 defines a Xen command line argument dom0=<list> where
there can be specified dom0 controlling sub-options, to use it also
on Arm, move the code that loops through the list of arguments from
x86 to the common code and from there, call architecture specific
functions to handle the comma separated sub-options.

No functional changes are intended.

Signed-off-by: Luca Fancellu <luca.fancellu@arm.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com>

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index c46f19208dcbabeba023cdf2cbbb2300d0666ae9..e2f0639914238d49ac6cdd89eee10a417493be1e 100644 (file)
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -60,6 +60,11 @@ static int __init parse_dom0_mem(const char *s)
 }
 custom_param("dom0_mem", parse_dom0_mem);
 
+int __init parse_arch_dom0_param(const char *s, const char *e)
+{
+    return -EINVAL;
+}
+
 /* Override macros from asm/page.h to make them work with mfn_t */
 #undef virt_to_mfn
 #define virt_to_mfn(va) _mfn(__virt_to_mfn(va))

diff --git a/xen/arch/x86/dom0_build.c b/xen/arch/x86/dom0_build.c
index 79234f18ff01b7491f1b8079bc6e8ea918acb721..9f5300a3efbbc3d2514b456d66576ba7d1f06171 100644 (file)
--- a/xen/arch/x86/dom0_build.c
+++ b/xen/arch/x86/dom0_build.c
@@ -266,42 +266,30 @@ bool __initdata opt_dom0_pvh = !IS_ENABLED(CONFIG_PV);
 bool __initdata opt_dom0_verbose = IS_ENABLED(CONFIG_VERBOSE_DEBUG);
 bool __initdata opt_dom0_msr_relaxed;
 
-static int __init cf_check parse_dom0_param(const char *s)
+int __init parse_arch_dom0_param(const char *s, const char *e)
 {
-    const char *ss;
-    int rc = 0;
+    int val;
 
-    do {
-        int val;
-
-        ss = strchr(s, ',');
-        if ( !ss )
-            ss = strchr(s, '\0');
-
-        if ( IS_ENABLED(CONFIG_PV) && !cmdline_strcmp(s, "pv") )
-            opt_dom0_pvh = false;
-        else if ( IS_ENABLED(CONFIG_HVM) && !cmdline_strcmp(s, "pvh") )
-            opt_dom0_pvh = true;
+    if ( IS_ENABLED(CONFIG_PV) && !cmdline_strcmp(s, "pv") )
+        opt_dom0_pvh = false;
+    else if ( IS_ENABLED(CONFIG_HVM) && !cmdline_strcmp(s, "pvh") )
+        opt_dom0_pvh = true;
 #ifdef CONFIG_SHADOW_PAGING
-        else if ( (val = parse_boolean("shadow", s, ss)) >= 0 )
-            opt_dom0_shadow = val;
+    else if ( (val = parse_boolean("shadow", s, e)) >= 0 )
+        opt_dom0_shadow = val;
 #endif
-        else if ( (val = parse_boolean("verbose", s, ss)) >= 0 )
-            opt_dom0_verbose = val;
-        else if ( IS_ENABLED(CONFIG_PV) &&
-                  (val = parse_boolean("cpuid-faulting", s, ss)) >= 0 )
-            opt_dom0_cpuid_faulting = val;
-        else if ( (val = parse_boolean("msr-relaxed", s, ss)) >= 0 )
-            opt_dom0_msr_relaxed = val;
-        else
-            rc = -EINVAL;
-
-        s = ss + 1;
-    } while ( *ss );
+    else if ( (val = parse_boolean("verbose", s, e)) >= 0 )
+        opt_dom0_verbose = val;
+    else if ( IS_ENABLED(CONFIG_PV) &&
+              (val = parse_boolean("cpuid-faulting", s, e)) >= 0 )
+        opt_dom0_cpuid_faulting = val;
+    else if ( (val = parse_boolean("msr-relaxed", s, e)) >= 0 )
+        opt_dom0_msr_relaxed = val;
+    else
+        return -EINVAL;
 
-    return rc;
+    return 0;
 }
-custom_param("dom0", parse_dom0_param);
 
 static char __initdata opt_dom0_ioports_disable[200] = "";
 string_param("dom0_ioports_disable", opt_dom0_ioports_disable);

diff --git a/xen/common/domain.c b/xen/common/domain.c
index 6a440590fe2aaeec43f3c2af5fdee6efbcbec605..caaa402637928a2170445e58bcf938015373b1ad 100644 (file)
--- a/xen/common/domain.c
+++ b/xen/common/domain.c
@@ -364,6 +364,29 @@ static int __init cf_check parse_extra_guest_irqs(const char *s)
 }
 custom_param("extra_guest_irqs", parse_extra_guest_irqs);
 
+static int __init cf_check parse_dom0_param(const char *s)
+{
+    const char *ss;
+    int rc = 0;
+
+    do {
+        int ret;
+
+        ss = strchr(s, ',');
+        if ( !ss )
+            ss = strchr(s, '\0');
+
+        ret = parse_arch_dom0_param(s, ss);
+        if ( ret && !rc )
+            rc = ret;
+
+        s = ss + 1;
+    } while ( *ss );
+
+    return rc;
+}
+custom_param("dom0", parse_dom0_param);
+
 /*
  * Release resources held by a domain.  There may or may not be live
  * references to the domain, and it may or may not be fully constructed.

diff --git a/xen/include/xen/domain.h b/xen/include/xen/domain.h
index 26f9c4f6dd5bb7878b1bb9fa8b53761238a1062a..1df8f933d0763d4e315ac1c40404808eccf58d2c 100644 (file)
--- a/xen/include/xen/domain.h
+++ b/xen/include/xen/domain.h
@@ -16,6 +16,7 @@ typedef union {
 struct vcpu *vcpu_create(struct domain *d, unsigned int vcpu_id);
 
 unsigned int dom0_max_vcpus(void);
+int parse_arch_dom0_param(const char *s, const char *e);
 struct vcpu *alloc_dom0_vcpu0(struct domain *dom0);
 
 int vcpu_reset(struct vcpu *);