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[RFC PATCH v6 27/43] arm/altp2m: Add support for altp2m_{get,set}_altp2m
- To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Rose Spangler <Rose.Spangler@xxxxxxxxxxxxxx>
- Date: Mon, 20 Apr 2026 17:26:32 -0400
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- Cc: Rose Spangler <Rose.Spangler@xxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, "Julien Grall" <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>
- Delivery-date: Mon, 20 Apr 2026 21:28:09 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
This commit adds support for altp2m_get_altp2m and altp2m_set_altp2m on
ARM. The x86-specific VCPU accesses have been replaced with the
architecture independent functions altp2m_vcpu_idx and altp2m_set_vcpu_idx.
This is commit 4/4 of the altp2m_{get,set}_altp2m phase.
Signed-off-by: Rose Spangler <Rose.Spangler@xxxxxxxxxxxxxx>
---
v6: Introduced this patch.
---
xen/include/xen/altp2m.h | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/xen/include/xen/altp2m.h b/xen/include/xen/altp2m.h
index 58e74be6deb0..f5a4d0e60562 100644
--- a/xen/include/xen/altp2m.h
+++ b/xen/include/xen/altp2m.h
@@ -8,6 +8,7 @@
#include <public/hvm/hvm_op.h>
+#include <asm/altp2m.h>
#include <asm/p2m.h>
#define INVALID_ALTP2M 0xffff
@@ -31,11 +32,10 @@ static inline bool altp2m_active(const struct domain *d)
return d->altp2m_active;
}
-#ifdef CONFIG_X86
/* get current alternate p2m table */
static inline struct p2m_domain *altp2m_get_altp2m(struct vcpu *v)
{
- unsigned int index = vcpu_altp2m(v).p2midx;
+ unsigned int index = altp2m_vcpu_idx(v);
if ( index == INVALID_ALTP2M )
return NULL;
@@ -52,19 +52,18 @@ static inline bool altp2m_set_altp2m(struct vcpu *v,
unsigned int idx)
BUG_ON(idx >= v->domain->nr_altp2m);
- if ( idx == vcpu_altp2m(v).p2midx )
+ if ( idx == altp2m_vcpu_idx(v) )
return false;
orig = altp2m_get_altp2m(v);
BUG_ON(!orig);
atomic_dec(&orig->active_vcpus);
- vcpu_altp2m(v).p2midx = idx;
+ altp2m_set_vcpu_idx(v, idx);
atomic_inc(&v->domain->altp2m_p2m[idx]->active_vcpus);
return true;
}
-#endif
int do_altp2m_op(XEN_GUEST_HANDLE_PARAM(void) arg);
--
2.34.1
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