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tests: Add platform argument support to kernel cmdline builder

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Introduce default_kernel_cmdline_with_platform() in GuestCommand
that accepts an optional platform parameter. For confidential
VMs, the platform arg is prepended to sev_snp=on. For regular
VMs, it is passed via --platform if provided.

Retain default_kernel_cmdline() as a convenience wrapper that
calls the new method with None, preserving backward
compatibility.

This enables tests to pass additional platform configuration
such as num_pci_segments alongside the default kernel and
cmdline setup.

Signed-off-by: Muminul Islam <muislam@microsoft.com>
This commit is contained in:
Muminul Islam
2026-03-07 22:07:18 -08:00
committed by Rob Bradford
parent 6f8776ac50
commit 2aa92bf4b4
1 changed files with 19 additions and 2 deletions
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21
test_infra/src/lib.rs
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@@ -1694,7 +1694,7 @@ impl<'a> GuestCommand<'a> {
self.args(["--net", self.guest.default_net_string().as_str()])
}
pub fn default_kernel_cmdline(&mut self) -> &mut Self {
pub fn default_kernel_cmdline_with_platform(&mut self, platform: Option<&str>) -> &mut Self {
if self.guest.vm_type == GuestVmType::Confidential {
let console_str = if let Some(c) = &self.guest.console_type {
c.as_str()
@@ -1709,17 +1709,34 @@ impl<'a> GuestCommand<'a> {
]);
self.command
.args(["--host-data", generate_host_data().as_str()]);
self.command.args(["--platform", "sev_snp=on"]);
self.command.args([
"--platform",
&format!(
"{}sev_snp=on",
if let Some(p) = platform {
format!("{p},")
} else {
String::new()
}
),
]);
} else if let Some(kernel) = &self.guest.kernel_path {
self.command.args(["--kernel", kernel.as_str()]);
if let Some(cmdline) = &self.guest.kernel_cmdline {
self.command.args(["--cmdline", cmdline]);
}
if let Some(platform_arg) = platform {
self.command.args(["--platform", platform_arg]);
}
}
self
}
pub fn default_kernel_cmdline(&mut self) -> &mut Self {
self.default_kernel_cmdline_with_platform(None)
}
pub fn default_cpus(&mut self) -> &mut Self {
self.args(["--cpus", self.guest.default_cpus_string().as_str()])
}