[v5,10/22] x86/virt/tdx: Do logical-cpu scope TDX module initialization

Commit Message

Huang, Kai June 22, 2022, 11:16 a.m. UTC

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 <[e-mail]>
---
 arch/x86/virt/vmx/tdx/tdx.c | 15 +++++++++++++++
 arch/x86/virt/vmx/tdx/tdx.h |  1 +
 2 files changed, 16 insertions(+)

Patch

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
 
 /*