Messages in this thread | | | From | Brian Gerst <> | Subject | [PATCH v2 0/6] x86/boot: Clean up handling of boot_params pointer | Date | Wed, 12 Apr 2023 14:44:56 -0400 |
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On entry from the bootloader, RSI contains the pointer to the boot_params data structure. The pointer is passed to x86_64_start_kernel(), which requires preserving RSI all the way though the early boot asm code. Change it to copy the boot_params data as soon as possible, which also has the benefit of not needing to remap the real mode data pages if memory encryption is enabled.
Note: The memory encryption changes are untested due to lack of hardware.
Brian Gerst (6): x86/boot: Move sanitize_boot_params() x86/boot: Remove extra call to copy_bootdata() x86/boot: Clean up get_cmd_line_ptr() x86/boot: Move copy_bootdata() to very early boot. x86/boot: Use copied boot data in __startup_64() x86/boot: Use copied boot data in sme_enable()
arch/x86/include/asm/mem_encrypt.h | 4 +- arch/x86/include/asm/setup.h | 9 +++-- arch/x86/kernel/head64.c | 59 ++++++++++------------------- arch/x86/kernel/head_64.S | 26 +++---------- arch/x86/kernel/setup.c | 2 +- arch/x86/mm/mem_encrypt_amd.c | 61 ------------------------------ arch/x86/mm/mem_encrypt_identity.c | 42 ++++++++++---------- arch/x86/xen/enlighten_pv.c | 2 +- 8 files changed, 58 insertions(+), 147 deletions(-)
-- 2.39.2
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