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[RFC PATCH v6 26/43] altp2m: Add altp2m_set_vcpu_idx
- To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Rose Spangler <Rose.Spangler@xxxxxxxxxxxxxx>
- Date: Mon, 20 Apr 2026 17:26:31 -0400
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- Cc: Rose Spangler <Rose.Spangler@xxxxxxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, "Volodymyr Babchuk" <Volodymyr_Babchuk@xxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, "Andrew Cooper" <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>
- Delivery-date: Mon, 20 Apr 2026 21:28:07 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
This commit adds the altp2m_set_vcpu_idx function for both x86 and ARM.
Since the altp2m VCPU index is stored differently depending on which
architecture is used, the altp2m_set_vcpu_idx function makes it possible to
set this value in an architecture independent way for common code routines.
This is commit 3/4 of the altp2m_{get,set}_altp2m phase.
Signed-off-by: Rose Spangler <Rose.Spangler@xxxxxxxxxxxxxx>
---
v6: Introduced this patch.
---
xen/arch/arm/include/asm/altp2m.h | 5 +++++
xen/arch/x86/include/asm/altp2m.h | 5 +++++
2 files changed, 10 insertions(+)
diff --git a/xen/arch/arm/include/asm/altp2m.h
b/xen/arch/arm/include/asm/altp2m.h
index bc695018e62c..f001e022a213 100644
--- a/xen/arch/arm/include/asm/altp2m.h
+++ b/xen/arch/arm/include/asm/altp2m.h
@@ -29,6 +29,11 @@ static inline uint16_t altp2m_vcpu_idx(const struct vcpu *v)
return v->arch.ap2m_idx;
}
+static inline void altp2m_set_vcpu_idx(struct vcpu *v, unsigned int idx)
+{
+ v->arch.ap2m_idx = idx;
+}
+
#else /* CONFIG_ALTP2M */
static inline bool altp2m_supported(void)
diff --git a/xen/arch/x86/include/asm/altp2m.h
b/xen/arch/x86/include/asm/altp2m.h
index a1b078783b3e..b3d348386a00 100644
--- a/xen/arch/x86/include/asm/altp2m.h
+++ b/xen/arch/x86/include/asm/altp2m.h
@@ -60,6 +60,11 @@ static inline uint16_t altp2m_vcpu_idx(const struct vcpu *v)
return vcpu_altp2m(v).p2midx;
}
+static inline void altp2m_set_vcpu_idx(struct vcpu *v, unsigned int idx)
+{
+ vcpu_altp2m(v).p2midx = idx;
+}
+
/*
* Alternate p2m: shadow p2m tables used for alternate memory views
*/
--
2.34.1
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