[PATCH v3 06/38] arm/p2m: Add HVMOP_altp2m_get_domain_state

[Sergej Proskurin <proskurin@sec.in.tum.de>]

This commit adopts the x86 HVMOP_altp2m_get_domain_state implementation.

Signed-off-by: Sergej Proskurin <proskurin@sec.in.tum.de>
---
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Julien Grall <julien.grall@arm.com>
---
v3: Removed the "altp2m_enabled" check in HVMOP_altp2m_get_domain_state
    case as it has been moved in front of the switch statement in
    "do_altp2m_op".

    Removed the macro "altp2m_enabled". Instead, check directly for the
    HVM_PARAM_ALTP2M param in d->arch.hvm_domain.
---
 xen/arch/arm/hvm.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/hvm.c b/xen/arch/arm/hvm.c
index ce6a436..180154e 100644
--- a/xen/arch/arm/hvm.c
+++ b/xen/arch/arm/hvm.c
@@ -66,7 +66,7 @@ static int do_altp2m_op(XEN_GUEST_HANDLE_PARAM(void) arg)
         goto out;
     }
 
-    if ( !(d)->arch.hvm_domain.params[HVM_PARAM_ALTP2M] )
+    if ( !d->arch.hvm_domain.params[HVM_PARAM_ALTP2M] )
     {
         rc = -EINVAL;
         goto out;
@@ -78,7 +78,8 @@ static int do_altp2m_op(XEN_GUEST_HANDLE_PARAM(void) arg)
     switch ( a.cmd )
     {
     case HVMOP_altp2m_get_domain_state:
-        rc = -EOPNOTSUPP;
+        a.u.domain_state.state = altp2m_active(d);
+        rc = __copy_to_guest(arg, &a, 1) ? -EFAULT : 0;
         break;
 
     case HVMOP_altp2m_set_domain_state:
-- 
2.9.0


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