[Xen-changelog] [xen master] xen: arm: Defer setting of VTCR_EL2 until after CPUs are up

[patchbot@xxxxxxx]

commit 67784ca4f9b15b55f075ebef76005af6e2b724b1
Author:     Ian Campbell <ian.campbell@xxxxxxxxxx>
AuthorDate: Thu Sep 18 01:09:51 2014 +0100
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Mon Sep 22 16:44:54 2014 +0100

    xen: arm: Defer setting of VTCR_EL2 until after CPUs are up
    
    Currently we retain the hardcoded values but soon we will want to calculate 
the
    correct values based upon the CPU properties common to all processors, which
    are only available once they are all up.
    
    Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
    Reviewed-by: Julien Grall <julien.grall@xxxxxxxxxx>
---
 xen/arch/arm/p2m.c     |   18 ++++++++++++++----
 xen/arch/arm/setup.c   |    4 ++--
 xen/arch/arm/smpboot.c |    2 --
 3 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index a1fef0f..e953ca3 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -1138,8 +1138,17 @@ err:
     return page;
 }
 
-void __cpuinit setup_virt_paging(void)
+static void __init setup_virt_paging_one(void *data)
 {
+    unsigned long val = (unsigned long)data;
+    WRITE_SYSREG32(val, VTCR_EL2);
+    isb();
+}
+
+void __init setup_virt_paging(void)
+{
+    unsigned long val;
+
     /* Setup Stage 2 address translation */
     /* SH0=11 (Inner-shareable)
      * ORGN0=IRGN0=01 (Normal memory, Write-Back Write-Allocate Cacheable)
@@ -1149,11 +1158,12 @@ void __cpuinit setup_virt_paging(void)
      *        PS=010 == 40 bits
      */
 #ifdef CONFIG_ARM_32
-    WRITE_SYSREG32(0x80003558, VTCR_EL2);
+    val = 0x80003558;
 #else
-    WRITE_SYSREG32(0x80023558, VTCR_EL2);
+    val = 0x80023558;
 #endif
-    isb();
+    setup_virt_paging_one((void *)val);
+    smp_call_function(setup_virt_paging_one, (void *)val, 1);
 }
 
 /*
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index 025349e..8844720 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -789,8 +789,6 @@ void __init start_xen(unsigned long boot_phys_offset,
 
     gic_init();
 
-    setup_virt_paging();
-
     p2m_vmid_allocator_init();
 
     softirq_init();
@@ -837,6 +835,8 @@ void __init start_xen(unsigned long boot_phys_offset,
     printk("Brought up %ld CPUs\n", (long)num_online_cpus());
     /* TODO: smp_cpus_done(); */
 
+    setup_virt_paging();
+
     do_initcalls();
 
     /* Create initial domain 0. */
diff --git a/xen/arch/arm/smpboot.c b/xen/arch/arm/smpboot.c
index cf149da..ee395a1 100644
--- a/xen/arch/arm/smpboot.c
+++ b/xen/arch/arm/smpboot.c
@@ -279,8 +279,6 @@ void __cpuinit start_secondary(unsigned long 
boot_phys_offset,
 
     init_traps();
 
-    setup_virt_paging();
-
     mmu_init_secondary_cpu();
 
     gic_init_secondary_cpu();
--
generated by git-patchbot for /home/xen/git/xen.git#master

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