diff options
author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2023-06-06 17:26:37 +0300 |
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committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-06-06 19:25:57 +0300 |
commit | 75d090fd167acab4d7eda7e2b65729e877c0fd64 (patch) | |
tree | 50b5ea974fee5ca5bee0dd213e090fd1e993db43 /arch/x86/include/asm/unaccepted_memory.h | |
parent | c2b353ae24d6fecddcc599529ad8319282494781 (diff) | |
download | linux-75d090fd167acab4d7eda7e2b65729e877c0fd64.tar.xz |
x86/tdx: Add unaccepted memory support
Hookup TDX-specific code to accept memory.
Accepting the memory is done with ACCEPT_PAGE module call on every page
in the range. MAP_GPA hypercall is not required as the unaccepted memory
is considered private already.
Extract the part of tdx_enc_status_changed() that does memory acceptance
in a new helper. Move the helper tdx-shared.c. It is going to be used by
both main kernel and decompressor.
[ bp: Fix the INTEL_TDX_GUEST=y, KVM_GUEST=n build. ]
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20230606142637.5171-10-kirill.shutemov@linux.intel.com
Diffstat (limited to 'arch/x86/include/asm/unaccepted_memory.h')
-rw-r--r-- | arch/x86/include/asm/unaccepted_memory.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86/include/asm/unaccepted_memory.h b/arch/x86/include/asm/unaccepted_memory.h new file mode 100644 index 000000000000..572514e36fde --- /dev/null +++ b/arch/x86/include/asm/unaccepted_memory.h @@ -0,0 +1,24 @@ +#ifndef _ASM_X86_UNACCEPTED_MEMORY_H +#define _ASM_X86_UNACCEPTED_MEMORY_H + +#include <linux/efi.h> +#include <asm/tdx.h> + +static inline void arch_accept_memory(phys_addr_t start, phys_addr_t end) +{ + /* Platform-specific memory-acceptance call goes here */ + if (cpu_feature_enabled(X86_FEATURE_TDX_GUEST)) { + if (!tdx_accept_memory(start, end)) + panic("TDX: Failed to accept memory\n"); + } else { + panic("Cannot accept memory: unknown platform\n"); + } +} + +static inline struct efi_unaccepted_memory *efi_get_unaccepted_table(void) +{ + if (efi.unaccepted == EFI_INVALID_TABLE_ADDR) + return NULL; + return __va(efi.unaccepted); +} +#endif |