[Xen-changelog] [xen stable-4.5] xen/arm: vgic-v2: Take the lock when writing into GICD_CTLR

[patchbot@xxxxxxx]

commit f5d255db19fb3b58e62c39c2010576d9d7231118
Author:     Julien Grall <julien.grall@xxxxxxxxxx>
AuthorDate: Mon Feb 16 14:50:52 2015 +0000
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Thu Apr 2 11:45:19 2015 +0100

    xen/arm: vgic-v2: Take the lock when writing into GICD_CTLR
    
    This register is shared between every vCPUs and the lock was already
    taken for read.
    
    Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
    Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
    (cherry picked from commit 26ea82f165295ea2ebd92e9c4579a757647fd399)
---
 xen/arch/arm/vgic-v2.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/xen/arch/arm/vgic-v2.c b/xen/arch/arm/vgic-v2.c
index 228e45d..86d3628 100644
--- a/xen/arch/arm/vgic-v2.c
+++ b/xen/arch/arm/vgic-v2.c
@@ -280,7 +280,10 @@ static int vgic_v2_distr_mmio_write(struct vcpu *v, 
mmio_info_t *info)
     case GICD_CTLR:
         if ( dabt.size != DABT_WORD ) goto bad_width;
         /* Ignore all but the enable bit */
+        vgic_lock(v);
         v->domain->arch.vgic.ctlr = (*r) & GICD_CTL_ENABLE;
+        vgic_unlock(v);
+
         return 1;
 
     /* R/O -- write ignored */
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.5

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