[PATCH for-4.12 v2 14/17] xen/arm: domctl: Use typesafe gfn in XEN_DOMCTL_cacheflush

From: Julien Grall <julien.grall@arm.com>
To: xen-devel@lists.xenproject.org
Cc: Julien Grall <julien.grall@arm.com>, sstabellini@kernel.org
Subject: [PATCH for-4.12 v2 14/17] xen/arm: domctl: Use typesafe gfn in XEN_DOMCTL_cacheflush
Date: Tue,  4 Dec 2018 20:26:48 +0000	[thread overview]
Message-ID: <20181204202651.8836-15-julien.grall@arm.com> (raw)
In-Reply-To: <20181204202651.8836-1-julien.grall@arm.com>

This will make changes in a follow-up patch easier.

Signed-off-by: Julien Grall <julien.grall@arm.com>

---
    Changes in v2:
        - Patch added
---
 xen/arch/arm/domctl.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/xen/arch/arm/domctl.c b/xen/arch/arm/domctl.c
index c10f568aad..20691528a6 100644
--- a/xen/arch/arm/domctl.c
+++ b/xen/arch/arm/domctl.c
@@ -52,16 +52,16 @@ long arch_do_domctl(struct xen_domctl *domctl, struct domain *d,
     {
     case XEN_DOMCTL_cacheflush:
     {
-        unsigned long s = domctl->u.cacheflush.start_pfn;
-        unsigned long e = s + domctl->u.cacheflush.nr_pfns;
+        gfn_t s = _gfn(domctl->u.cacheflush.start_pfn);
+        gfn_t e = gfn_add(s, domctl->u.cacheflush.nr_pfns);
 
         if ( domctl->u.cacheflush.nr_pfns > (1U<<MAX_ORDER) )
             return -EINVAL;
 
-        if ( e < s )
+        if ( gfn_x(e) < gfn_x(s) )
             return -EINVAL;
 
-        return p2m_cache_flush_range(d, _gfn(s), _gfn(e));
+        return p2m_cache_flush_range(d, s, e);
     }
     case XEN_DOMCTL_bind_pt_irq:
     {
-- 
2.11.0


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