Messages in this thread | | | From | Kuppuswamy Sathyanarayanan <> | Subject | [RFC v2-fix-v2 0/3] x86/tdx: Handle port I/O | Date | Tue, 8 Jun 2021 08:40:20 -0700 |
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This patchset addresses the review comments in the patch titled "[RFC v2 14/32] x86/tdx: Handle port I/O". Since it requires patch split, sending these together.
Changes since RFC v2-fix-v1: * Splitted TDX decompression IO support into a seperate patch. * Implemented tdg_handle_io() and tdx_early_io() in the similar way as per review suggestion. * Added VE_IS_IO_OUT() macro as per review suggestion. * Added VE_IS_IO_STRING() to check the string I/O case in tdx_early_io() * Removed helper function tdg_in() and tdg_out() and directly called IO hypercall to make the implementation uniform in decompression code, early IO code and normal IO handler code.
Changes since RFC v2: * Removed assembly implementation of port IO emulation code and modified __in/__out IO helpers to directly call C function for in/out instruction emulation in decompression code. * Added helper function tdx_get_iosize() to make it easier for calling tdg_out/tdg_int() C functions from decompression code. * Added support for early exception handler to support IO instruction emulation in early boot kernel code. * Removed alternative_ usage and made kernel only use #VE based IO instruction emulation support outside the decompression module. * Added support for protection_guest_has() API to generalize AMD SEV/TDX specific initialization code in common drivers. * Fixed commit log and comments as per review comments.
Andi Kleen (1): x86/tdx: Handle early IO operations
Kirill A. Shutemov (1): x86/tdx: Handle port I/O
Kuppuswamy Sathyanarayanan (1): x86/tdx: Handle port I/O in decompression code
arch/x86/boot/compressed/Makefile | 1 + arch/x86/boot/compressed/tdcall.S | 3 ++ arch/x86/include/asm/io.h | 15 +++--- arch/x86/include/asm/tdx.h | 54 ++++++++++++++++++++ arch/x86/kernel/head64.c | 3 ++ arch/x86/kernel/tdx.c | 84 +++++++++++++++++++++++++++++++ 6 files changed, 154 insertions(+), 6 deletions(-) create mode 100644 arch/x86/boot/compressed/tdcall.S
-- 2.25.1
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