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Re: [PATCH 14/15] x86/hyperlaunch: add max vcpu parsing of hyperlaunch device tree
- To: "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Jason Andryuk <jason.andryuk@xxxxxxx>
- Date: Mon, 25 Nov 2024 19:05:38 -0500
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- Cc: <christopher.w.clark@xxxxxxxxx>, <stefano.stabellini@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Tue, 26 Nov 2024 01:47:30 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 2024-11-23 13:20, Daniel P. Smith wrote:
Introduce the `cpus` property, named as such for dom0less compatibility, that
represents the maximum number of vpcus to allocate for a domain. In the device
tree, it will be encoded as a u32 value.
Signed-off-by: Daniel P. Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
---
diff --git a/xen/arch/x86/domain_builder/fdt.c
b/xen/arch/x86/domain_builder/fdt.c
index b8ace5c18c6a..d24e265f2378 100644
--- a/xen/arch/x86/domain_builder/fdt.c
+++ b/xen/arch/x86/domain_builder/fdt.c
@@ -197,6 +197,18 @@ static int __init process_domain_node(
bd->max_pages = PFN_DOWN(kb * SZ_1K);
printk(" max memory: %ld\n", bd->max_pages << PAGE_SHIFT);
}
+ if ( match_fdt_property(fdt, prop, "cpus" ) )
I think I forgot to mention it on earlier ones, but I think all these
match_fdt_property() should be chained together with "else if".
With that
Reviewed-by: Jason Andryuk <jason.andryuk@xxxxxxx>
+ {
+ uint32_t val = UINT_MAX;
+ if ( fdt_prop_as_u32(prop, &val) != 0 )
+ {
+ printk(" failed processing max_vcpus for domain %s\n",
+ name == NULL ? "unknown" : name);
+ return -EINVAL;
+ }
+ bd->max_vcpus = val;
+ printk(" max vcpus: %d\n", bd->max_vcpus);
+ }
}
fdt_for_each_subnode(node, fdt, dom_node)
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