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[XEN][PATCH 1/7] xen/arm64: domctl: set_address_size add check for vcpus not initialized
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Grygorii Strashko <grygorii_strashko@xxxxxxxx>
- Date: Thu, 31 Jul 2025 09:42:37 +0000
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- Cc: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>, Grygorii Strashko <grygorii_strashko@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Thu, 31 Jul 2025 09:42:49 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHcAf9z+cgJcZklCkuBKcN3O427bQ==
- Thread-topic: [XEN][PATCH 1/7] xen/arm64: domctl: set_address_size add check for vcpus not initialized
From: Grygorii Strashko <grygorii_strashko@xxxxxxxx>
The vcpu ctx initialization (arch_set_info_guest()) is depends on proper
domain type (32/64bit) configuration, so check that vcpus are not
initialized when toolstack issues XEN_DOMCTL_set_address_size hypercall.
Signed-off-by: Grygorii Strashko <grygorii_strashko@xxxxxxxx>
---
xen/arch/arm/arm64/domctl.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/xen/arch/arm/arm64/domctl.c b/xen/arch/arm/arm64/domctl.c
index 8720d126c97d..82eff26fb0d1 100644
--- a/xen/arch/arm/arm64/domctl.c
+++ b/xen/arch/arm/arm64/domctl.c
@@ -13,6 +13,19 @@
#include <asm/arm64/sve.h>
#include <asm/cpufeature.h>
+static bool vcpus_check_initialised(struct domain *d)
+{
+ struct vcpu *v;
+
+ for_each_vcpu(d, v)
+ {
+ if ( v->is_initialised )
+ return true;
+ }
+
+ return false;
+}
+
static long switch_mode(struct domain *d, enum domain_type type)
{
struct vcpu *v;
@@ -21,6 +34,8 @@ static long switch_mode(struct domain *d, enum domain_type
type)
return -EINVAL;
if ( domain_tot_pages(d) != 0 )
return -EBUSY;
+ if ( vcpus_check_initialised(d) )
+ return -EBUSY;
if ( d->arch.type == type )
return 0;
--
2.34.1
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