[v8] QEMU TDX support

[PATCH v8 30/55] kvm: Check KVM_CAP_MAX_VCPUS at vm level

Posted by Xiaoyao Li 10 months, 2 weeks ago

KVM with TDX support starts to report different KVM_CAP_MAX_VCPUS per
different VM types. So switch to check the KVM_CAP_MAX_VCPUS at vm level.

KVM still returns the global KVM_CAP_MAX_VCPUS when the KVM is old that
doesn't report different value at vm level.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
 accel/kvm/kvm-all.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index df9840e53a35..5835d840f3ad 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -2425,7 +2425,7 @@ static int kvm_recommended_vcpus(KVMState *s)
 
 static int kvm_max_vcpus(KVMState *s)
 {
-    int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS);
+    int ret = kvm_vm_check_extension(s, KVM_CAP_MAX_VCPUS);
     return (ret) ? ret : kvm_recommended_vcpus(s);
 }
 
-- 
2.34.1

Re: [PATCH v8 30/55] kvm: Check KVM_CAP_MAX_VCPUS at vm level

Posted by Zhao Liu 9 months, 2 weeks ago

On Tue, Apr 01, 2025 at 09:01:40AM -0400, Xiaoyao Li wrote:
> Date: Tue,  1 Apr 2025 09:01:40 -0400
> From: Xiaoyao Li <xiaoyao.li@intel.com>
> Subject: [PATCH v8 30/55] kvm: Check KVM_CAP_MAX_VCPUS at vm level
> X-Mailer: git-send-email 2.34.1
> 
> KVM with TDX support starts to report different KVM_CAP_MAX_VCPUS per
> different VM types. So switch to check the KVM_CAP_MAX_VCPUS at vm level.
> 
> KVM still returns the global KVM_CAP_MAX_VCPUS when the KVM is old that
> doesn't report different value at vm level.
> 
> Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
> ---
>  accel/kvm/kvm-all.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>