[PATCH v2 11/35] xen/domain: enable max_init_domid for all architectures

[Denis Mukhin via B4 Relay <devnull+dmukhin.ford.com@xxxxxxxxxx>]

From: Denis Mukhin <dmukhin@xxxxxxxx>

Move max_init_domid to a public API and enable for all architectures.
That is pre-requisite change for console focus switch logic cleanup.

max_init_domid is updated in domain_create().

Signed-off-by: Denis Mukhin <dmukhin@xxxxxxxx>
---
 xen/arch/arm/include/asm/setup.h   | 2 --
 xen/arch/arm/setup.c               | 2 --
 xen/arch/ppc/include/asm/setup.h   | 2 --
 xen/arch/riscv/include/asm/setup.h | 2 --
 xen/arch/x86/include/asm/setup.h   | 2 --
 xen/common/domain.c                | 9 +++++++++
 xen/include/xen/domain.h           | 2 ++
 7 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/xen/arch/arm/include/asm/setup.h b/xen/arch/arm/include/asm/setup.h
index 
64c227d171fc7b92e5b62d9fd42e5662871bd12b..d4e1670cd69cdd4475b2a5eb316d2c0601090ed7
 100644
--- a/xen/arch/arm/include/asm/setup.h
+++ b/xen/arch/arm/include/asm/setup.h
@@ -19,8 +19,6 @@ struct map_range_data
     struct rangeset *irq_ranges;
 };
 
-extern domid_t max_init_domid;
-
 void copy_from_paddr(void *dst, paddr_t paddr, unsigned long len);
 
 size_t estimate_efi_size(unsigned int mem_nr_banks);
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index 
2e27af4560a504bf57daef572d4a768bd886145b..cb218fe3eb36f2cdda47cfa092fa99ee1ca4a14c
 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -58,8 +58,6 @@ struct cpuinfo_arm __read_mostly system_cpuinfo;
 bool __read_mostly acpi_disabled;
 #endif
 
-domid_t __read_mostly max_init_domid;
-
 static __used void init_done(void)
 {
     int rc;
diff --git a/xen/arch/ppc/include/asm/setup.h b/xen/arch/ppc/include/asm/setup.h
index 
e4f64879b68ca5aac24bd9544255143e6ef693f3..956fa6985adb23375bd41d3e5d34d9d5f0712bd5
 100644
--- a/xen/arch/ppc/include/asm/setup.h
+++ b/xen/arch/ppc/include/asm/setup.h
@@ -1,6 +1,4 @@
 #ifndef __ASM_PPC_SETUP_H__
 #define __ASM_PPC_SETUP_H__
 
-#define max_init_domid (0)
-
 #endif /* __ASM_PPC_SETUP_H__ */
diff --git a/xen/arch/riscv/include/asm/setup.h 
b/xen/arch/riscv/include/asm/setup.h
index 
844a2f0ef1d762b3a9bc90b61a336a23f1693cc9..978cad71d3df484e80ba19acc0e37b9278e941f0
 100644
--- a/xen/arch/riscv/include/asm/setup.h
+++ b/xen/arch/riscv/include/asm/setup.h
@@ -3,8 +3,6 @@
 #ifndef ASM__RISCV__SETUP_H
 #define ASM__RISCV__SETUP_H
 
-#define max_init_domid (0)
-
 void setup_mm(void);
 
 #endif /* ASM__RISCV__SETUP_H */
diff --git a/xen/arch/x86/include/asm/setup.h b/xen/arch/x86/include/asm/setup.h
index 
5c2391a8684b66efdf4b092409ed33935db6b40c..296348655b9d146c73acc305cc9edd5fd46f7d47
 100644
--- a/xen/arch/x86/include/asm/setup.h
+++ b/xen/arch/x86/include/asm/setup.h
@@ -69,6 +69,4 @@ extern bool opt_dom0_verbose;
 extern bool opt_dom0_cpuid_faulting;
 extern bool opt_dom0_msr_relaxed;
 
-#define max_init_domid (0)
-
 #endif
diff --git a/xen/common/domain.c b/xen/common/domain.c
index 
2f67aa06ed50e69c27cedc8d7f6eb0b469fe81cd..9e57dd4122a726e2fb42efe9c029e775202be0e6
 100644
--- a/xen/common/domain.c
+++ b/xen/common/domain.c
@@ -65,6 +65,9 @@ DEFINE_RCU_READ_LOCK(domlist_read_lock);
 static struct domain *domain_hash[DOMAIN_HASH_SIZE];
 struct domain *domain_list;
 
+/* Last known non-system domain ID. */
+domid_t __read_mostly max_init_domid;
+
 /*
  * Insert a domain into the domlist/hash.  This allows the domain to be looked
  * up by domid, and therefore to be the subject of hypercalls/etc.
@@ -815,6 +818,12 @@ struct domain *domain_create(domid_t domid,
 
     memcpy(d->handle, config->handle, sizeof(d->handle));
 
+    /*
+     * Housekeeping for physical console forwarding to the domain.
+     */
+    if ( !is_system_domain(d) && max_init_domid < domid )
+        max_init_domid = domid;
+
     return d;
 
  fail:
diff --git a/xen/include/xen/domain.h b/xen/include/xen/domain.h
index 
601ef431cf621af44c867400499b73b845eb137a..6102826a929ff7aad58a4bc40974815071a97446
 100644
--- a/xen/include/xen/domain.h
+++ b/xen/include/xen/domain.h
@@ -171,6 +171,8 @@ extern bool vmtrace_available;
 
 extern bool vpmu_is_available;
 
+extern domid_t max_init_domid;
+
 domid_t get_initial_domain_id(void);
 
 #endif /* __XEN_DOMAIN_H__ */

-- 
2.34.1