From: Kai Huang <kai.huang@intel.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: seanjc@google.com, pbonzini@redhat.com, dave.hansen@intel.com,
len.brown@intel.com, tony.luck@intel.com,
rafael.j.wysocki@intel.com, reinette.chatre@intel.com,
dan.j.williams@intel.com, peterz@infradead.org,
ak@linux.intel.com, kirill.shutemov@linux.intel.com,
sathyanarayanan.kuppuswamy@linux.intel.com,
isaku.yamahata@intel.com, kai.huang@intel.com
Subject: [PATCH v4 10/22] x86/virt/tdx: Do logical-cpu scope TDX module initialization
Date: Wed, 1 Jun 2022 07:39:33 +1200 [thread overview]
Message-ID: <f87ac9fd402279bd2960d345f12228a8f5be7cd1.1654025431.git.kai.huang@intel.com> (raw)
In-Reply-To: <cover.1654025430.git.kai.huang@intel.com>
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 37a5f37dc013..081aa7e280d8 100644
--- a/arch/x86/virt/vmx/tdx/tdx.c
+++ b/arch/x86/virt/vmx/tdx/tdx.c
@@ -201,6 +201,15 @@ 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.
*
@@ -225,6 +234,12 @@ 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
/*
--
2.35.3
next prev parent reply other threads:[~2022-05-31 19:41 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-31 19:39 [PATCH v4 00/22] TDX host kernel support Kai Huang
2022-05-31 19:39 ` [PATCH v4 01/22] x86/virt/tdx: Detect TDX during kernel boot Kai Huang
2022-05-31 19:39 ` [PATCH v4 02/22] cc_platform: Add new attribute to prevent ACPI CPU hotplug Kai Huang
2022-05-31 19:39 ` [PATCH v4 03/22] cc_platform: Add new attribute to prevent ACPI memory hotplug Kai Huang
2022-05-31 19:39 ` [PATCH v4 04/22] x86/virt/tdx: Prevent ACPI CPU hotplug and " Kai Huang
2022-05-31 19:39 ` [PATCH v4 05/22] x86/virt/tdx: Prevent hot-add driver managed memory Kai Huang
2022-05-31 19:39 ` [PATCH v4 06/22] x86/virt/tdx: Add skeleton to initialize TDX on demand Kai Huang
2022-05-31 19:39 ` [PATCH v4 07/22] x86/virt/tdx: Implement SEAMCALL function Kai Huang
2022-05-31 19:39 ` [PATCH v4 08/22] x86/virt/tdx: Shut down TDX module in case of error Kai Huang
2022-05-31 19:39 ` [PATCH v4 09/22] x86/virt/tdx: Detect TDX module by doing module global initialization Kai Huang
2022-05-31 19:39 ` Kai Huang [this message]
2022-05-31 19:39 ` [PATCH v4 11/22] x86/virt/tdx: Get information about TDX module and TDX-capable memory Kai Huang
2022-05-31 19:39 ` [PATCH v4 12/22] x86/virt/tdx: Convert all memory regions in memblock to TDX memory Kai Huang
2022-05-31 19:39 ` [PATCH v4 13/22] x86/virt/tdx: Add placeholder to construct TDMRs based on memblock Kai Huang
2022-05-31 19:39 ` [PATCH v4 14/22] x86/virt/tdx: Create TDMRs to cover all memblock memory regions Kai Huang
2022-05-31 19:39 ` [PATCH v4 15/22] x86/virt/tdx: Allocate and set up PAMTs for TDMRs Kai Huang
2022-05-31 19:39 ` [PATCH v4 16/22] x86/virt/tdx: Set up reserved areas for all TDMRs Kai Huang
2022-05-31 19:39 ` [PATCH v4 17/22] x86/virt/tdx: Reserve TDX module global KeyID Kai Huang
2022-05-31 19:39 ` [PATCH v4 18/22] x86/virt/tdx: Configure TDX module with TDMRs and " Kai Huang
2022-05-31 19:39 ` [PATCH v4 19/22] x86/virt/tdx: Configure global KeyID on all packages Kai Huang
2022-05-31 19:39 ` [PATCH v4 20/22] x86/virt/tdx: Initialize all TDMRs Kai Huang
2022-05-31 19:39 ` [PATCH v4 21/22] x86/virt/tdx: Support kexec() Kai Huang
2022-05-31 19:39 ` [PATCH v4 22/22] Documentation/x86: Add documentation for TDX host support Kai Huang
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