wireguard-linux/arch/x86/boot/compressed/misc.c, branch jd/unified-crypt-queue

x86/boot/64: Round memory hole size up to next PMD page

2019-10-11T16:47:23Z

The kernel image map is created using PMD pages, which can include some extra space beyond what's actually needed. Round the size of the memory hole we search for up to the next PMD boundary, to be certain all of the space to be mapped is usable RAM and includes no reserved areas. Signed-off-by: Steve Wahl Signed-off-by: Borislav Petkov Acked-by: Dave Hansen Acked-by: Kirill A. Shutemov Cc: Baoquan He Cc: Brijesh Singh Cc: dimitri.sivanich@hpe.com Cc: Feng Tang Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Jordan Borgner Cc: Juergen Gross Cc: mike.travis@hpe.com Cc: russ.anderson@hpe.com Cc: Thomas Gleixner Cc: x86-ml Cc: Zhenzhong Duan Link: https://lkml.kernel.org/r/df4f49f05c0c27f108234eb93db5c613d09ea62e.1569358539.git.steve.wahl@hpe.com

x86, boot: Remove multiple copy of static function sanitize_boot_params()

2019-07-18T19:41:57Z

Kernel build warns: 'sanitize_boot_params' defined but not used [-Wunused-function] at below files: arch/x86/boot/compressed/cmdline.c arch/x86/boot/compressed/error.c arch/x86/boot/compressed/early_serial_console.c arch/x86/boot/compressed/acpi.c That's becausethey each include misc.h which includes a definition of sanitize_boot_params() via bootparam_utils.h. Remove the inclusion from misc.h and have the c file including bootparam_utils.h directly. Signed-off-by: Zhenzhong Duan Signed-off-by: Thomas Gleixner Link: https://lkml.kernel.org/r/1563283092-1189-1-git-send-email-zhenzhong.duan@oracle.com

x86/boot: Call get_rsdp_addr() after console_init()

2019-06-06T18:29:27Z

... so that early debugging output from the RSDP parsing code can be visible and collected. Suggested-by: Dave Young Signed-off-by: Borislav Petkov Cc: Baoquan He Cc: Chao Fan Cc: Jun'ichi Nomura Cc: Kairui Song Cc: kexec@lists.infradead.org Cc: x86@kernel.org

Revert "x86/boot: Disable RSDP parsing temporarily"

2019-06-06T18:29:06Z

TODO: - ask dyoung and Dirk van der Merwe to test again. This reverts commit 36f0c423552dacaca152324b8e9bda42a6d88865. Now that the required fixes are in place, reenable early RSDP parsing. Signed-off-by: Borislav Petkov Cc: Baoquan He Cc: Chao Fan Cc: Dave Hansen Cc: "H. Peter Anvin" Cc: indou.takao@jp.fujitsu.com Cc: Ingo Molnar Cc: Juergen Gross Cc: kasong@redhat.com Cc: Kees Cook Cc: "Kirill A. Shutemov" Cc: msys.mizuma@gmail.com Cc: Thomas Gleixner Cc: Tom Lendacky Cc: x86-ml

x86/boot: Disable RSDP parsing temporarily

2019-04-22T09:36:43Z

The original intention to move RDSP parsing very early, before KASLR does its ranges selection, was to accommodate movable memory regions machines (CONFIG_MEMORY_HOTREMOVE) to still be able to do memory hotplug. However, that broke kexec'ing a kernel on EFI machines because depending on where the EFI systab was mapped, on at least one machine it isn't present in the kexec mapping of the second kernel, leading to a triple fault in the early code. Fixing this properly requires significantly involved surgery and we cannot allow ourselves to do that, that close to the merge window. So disable the RSDP parsing code temporarily until it is fixed properly in the next release cycle. Signed-off-by: Borislav Petkov Cc: Ard Biesheuvel Cc: Baoquan He Cc: Chao Fan Cc: Dave Hansen Cc: "H. Peter Anvin" Cc: indou.takao@jp.fujitsu.com Cc: Ingo Molnar Cc: Juergen Gross Cc: kasong@redhat.com Cc: Kees Cook Cc: "Kirill A. Shutemov" Cc: msys.mizuma@gmail.com Cc: Thomas Gleixner Cc: Tom Lendacky Cc: x86-ml Link: https://lkml.kernel.org/r/20190419141952.GE10324@zn.tnic

x86/boot: Early parse RSDP and save it in boot_params

2019-02-01T10:52:55Z

The RSDP is needed by KASLR so parse it early and save it in boot_params.acpi_rsdp_addr, before KASLR setup runs. RSDP is needed by other kernel facilities so have the parsing code built-in instead of a long "depends on" line in Kconfig. [ bp: - Trim commit message and comments - Add CONFIG_ACPI dependency in the Makefile - Move ->acpi_rsdp_addr assignment with the rest of boot_params massaging in extract_kernel(). ] Signed-off-by: Chao Fan Signed-off-by: Borislav Petkov Cc: bhe@redhat.com Cc: Cao jin Cc: "H. Peter Anvin" Cc: indou.takao@jp.fujitsu.com Cc: Ingo Molnar Cc: Juergen Gross Cc: kasong@redhat.com Cc: Kees Cook Cc: "Kirill A. Shutemov" Cc: Masahiro Yamada Cc: msys.mizuma@gmail.com Cc: Thomas Gleixner Cc: Tom Lendacky Cc: x86-ml Link: https://lkml.kernel.org/r/20190123110850.12433-6-fanc.fnst@cn.fujitsu.com

Merge tag 'v4.16-rc7' into x86/mm, to fix up conflict

2018-03-27T06:43:39Z

Conflicts: arch/x86/mm/init_64.c Signed-off-by: Ingo Molnar

x86/boot/64: Verify alignment of the LOAD segment

2018-03-20T07:03:03Z

Since the x86-64 kernel must be aligned to 2MB, refuse to boot the kernel if the alignment of the LOAD segment isn't a multiple of 2MB. Signed-off-by: H.J. Lu Cc: Andy Shevchenko Cc: Eric Biederman Cc: H. Peter Anvin Cc: Juergen Gross Cc: Kees Cook Cc: Kirill A. Shutemov Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/CAMe9rOrR7xSJgUfiCoZLuqWUwymRxXPoGBW38%2BpN%3D9g%2ByKNhZw@mail.gmail.com Signed-off-by: Ingo Molnar

x86/boot/compressed/64: Find a place for 32-bit trampoline

2018-03-12T08:37:23Z

If a bootloader enables 64-bit mode with 4-level paging, we might need to switch over to 5-level paging. The switching requires the disabling of paging, which works fine if kernel itself is loaded below 4G. But if the bootloader puts the kernel above 4G (not sure if anybody does this), we would lose control as soon as paging is disabled, because the code becomes unreachable to the CPU. To handle the situation, we need a trampoline in lower memory that would take care of switching on 5-level paging. This patch finds a spot in low memory for a trampoline. The heuristic is based on code in reserve_bios_regions(). We find the end of low memory based on BIOS and EBDA start addresses. The trampoline is put just before end of low memory. It's mimic approach taken to allocate memory for realtime trampoline. Tested-by: Borislav Petkov Signed-off-by: Kirill A. Shutemov Cc: Andy Lutomirski Cc: Andy Shevchenko Cc: Cyrill Gorcunov Cc: Eric Biederman Cc: H. Peter Anvin Cc: Juergen Gross Cc: Kees Cook Cc: Linus Torvalds Cc: Matthew Wilcox Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20180226180451.86788-3-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar

x86/mm: Allow to boot without LA57 if CONFIG_X86_5LEVEL=y

2018-02-16T09:48:49Z

All pieces of the puzzle are in place and we can now allow to boot with CONFIG_X86_5LEVEL=y on a machine without LA57 support. Kernel will detect that LA57 is missing and fold p4d at runtime. Update the documentation and the Kconfig option description to reflect the change. Signed-off-by: Kirill A. Shutemov Cc: Andy Lutomirski Cc: Arjan van de Ven Cc: Borislav Petkov Cc: Dan Williams Cc: Dave Hansen Cc: David Woodhouse Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20180214182542.69302-10-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar