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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2022-04-06 02:29:25 +0300 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2022-04-07 08:27:52 -0700 |
| commit | 4c5b9aac6cade51aef64cc6ed67f2ad5acda9aed (patch) | |
| tree | 6bef19d8aa11b9470c4ce4b5b9c05418ac4429e8 /arch/x86/boot/compressed/tdcall.S | |
| parent | eb4ea1ae8f45e3249e7586f30be8977478202a37 (diff) | |
| download | linux-stable-4c5b9aac6cade51aef64cc6ed67f2ad5acda9aed.tar.gz linux-stable-4c5b9aac6cade51aef64cc6ed67f2ad5acda9aed.tar.bz2 linux-stable-4c5b9aac6cade51aef64cc6ed67f2ad5acda9aed.zip | |
x86/boot: Port I/O: Add decompression-time support for TDX
Port I/O instructions trigger #VE in the TDX environment. In response to
the exception, kernel emulates these instructions using hypercalls.
But during early boot, on the decompression stage, it is cumbersome to
deal with #VE. It is cleaner to go to hypercalls directly, bypassing #VE
handling.
Hook up TDX-specific port I/O helpers if booting in TDX environment.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lkml.kernel.org/r/20220405232939.73860-17-kirill.shutemov@linux.intel.com
Diffstat (limited to 'arch/x86/boot/compressed/tdcall.S')
| -rw-r--r-- | arch/x86/boot/compressed/tdcall.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/tdcall.S b/arch/x86/boot/compressed/tdcall.S new file mode 100644 index 000000000000..46d0495e0d3a --- /dev/null +++ b/arch/x86/boot/compressed/tdcall.S @@ -0,0 +1,3 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include "../../coco/tdx/tdcall.S" |