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Subject[PATCH v5 10/22] x86/virt/tdx: Do logical-cpu scope TDX module initialization
Date
After the global module initialization, the next step is logical-cpu
scope module initialization. Logical-cpu initialization requires
calling TDH.SYS.LP.INIT on all BIOS-enabled CPUs. This SEAMCALL can run
concurrently on all CPUs.

Use the helper introduced for shutting down the module to do logical-cpu
scope initialization.

Signed-off-by: Kai Huang <kai.huang@intel.com>
---
arch/x86/virt/vmx/tdx/tdx.c | 15 +++++++++++++++
arch/x86/virt/vmx/tdx/tdx.h | 1 +
2 files changed, 16 insertions(+)

diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c
index de4efc16ed45..f3f6e20aa30e 100644
--- a/arch/x86/virt/vmx/tdx/tdx.c
+++ b/arch/x86/virt/vmx/tdx/tdx.c
@@ -195,6 +195,15 @@ static int tdx_module_init_global(void)
return ret ? -EFAULT : 0;
}

+static int tdx_module_init_cpus(void)
+{
+ struct seamcall_ctx sc = { .fn = TDH_SYS_LP_INIT };
+
+ seamcall_on_each_cpu(&sc);
+
+ return atomic_read(&sc.err);
+}
+
/*
* Detect and initialize the TDX module.
*
@@ -219,6 +228,12 @@ static int init_tdx_module(void)
if (ret)
goto out;

+ /* Logical-cpu scope initialization */
+ ret = tdx_module_init_cpus();
+ if (ret)
+ goto out;
+
+
/*
* Return -EINVAL until all steps of TDX module initialization
* process are done.
diff --git a/arch/x86/virt/vmx/tdx/tdx.h b/arch/x86/virt/vmx/tdx/tdx.h
index 9e694789eb91..56164bf27378 100644
--- a/arch/x86/virt/vmx/tdx/tdx.h
+++ b/arch/x86/virt/vmx/tdx/tdx.h
@@ -50,6 +50,7 @@
* TDX module SEAMCALL leaf functions
*/
#define TDH_SYS_INIT 33
+#define TDH_SYS_LP_INIT 35
#define TDH_SYS_LP_SHUTDOWN 44

/*
--
2.36.1
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