BMC/Intel-BMC/linux.git/arch/x86/boot, branch dev-4.3

x86/efi: Fix multiple GOP device support

2015-10-14T14:02:43+00:00

When multiple GOP devices exists, but none of them implements ConOut, the code should just choose the first GOP (according to the comments). But currently 'fb_base' will refer to the last GOP, while other parameters to the first GOP, which will likely result in a garbled display. I can reliably reproduce this bug using my ASRock Z87M Extreme4 motherboard with CSM and integrated GPU disabled, and two PCIe video cards (NVidia GT640 and GTX980), booting from efi-stub (booting from grub works fine). On the primary display the ASRock logo remains and on the secondary screen it is garbled up completely. Signed-off-by: Kővágó, Zoltán Signed-off-by: Matt Fleming Cc: Cc: Linus Torvalds Cc: Matthew Garrett Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1444659236-24837-2-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar

lib/decompressors: use real out buf size for gunzip with kernel

2015-09-10T20:29:01+00:00

When loading x86 64bit kernel above 4GiB with patched grub2, got kernel gunzip error. | early console in decompress_kernel | decompress_kernel: | input: [0x807f2143b4-0x807ff61aee] | output: [0x807cc00000-0x807f3ea29b] 0x027ea29c: output_len | boot via startup_64 | KASLR using RDTSC... | new output: [0x46fe000000-0x470138cfff] 0x0338d000: output_run_size | decompress: [0x46fe000000-0x47007ea29b] <=== [0x807f2143b4-0x807ff61aee] | | Decompressing Linux... gz... | | uncompression error | | -- System halted the new buffer is at 0x46fe000000ULL, decompressor_gzip is using 0xffffffb901ffffff as out_len. gunzip in lib/zlib_inflate/inflate.c cap that len to 0x01ffffff and decompress fails later. We could hit this problem with crashkernel booting that uses kexec loading kernel above 4GiB. We have decompress_* support: 1. inbuf[]/outbuf[] for kernel preboot. 2. inbuf[]/flush() for initramfs 3. fill()/flush() for initrd. This bug only affect kernel preboot path that use outbuf[]. Add __decompress and take real out_buf_len for gunzip instead of guessing wrong buf size. Fixes: 1431574a1c4 (lib/decompressors: fix "no limit" output buffer length) Signed-off-by: Yinghai Lu Cc: Alexandre Courbot Cc: Jon Medhurst Cc: Stephen Warren Cc: "H. Peter Anvin" Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kexec: split kexec_load syscall from kexec core code

2015-09-10T20:29:01+00:00

There are two kexec load syscalls, kexec_load another and kexec_file_load. kexec_file_load has been splited as kernel/kexec_file.c. In this patch I split kexec_load syscall code to kernel/kexec.c. And add a new kconfig option KEXEC_CORE, so we can disable kexec_load and use kexec_file_load only, or vice verse. The original requirement is from Ted Ts'o, he want kexec kernel signature being checked with CONFIG_KEXEC_VERIFY_SIG enabled. But kexec-tools use kexec_load syscall can bypass the checking. Vivek Goyal proposed to create a common kconfig option so user can compile in only one syscall for loading kexec kernel. KEXEC/KEXEC_FILE selects KEXEC_CORE so that old config files still work. Because there's general code need CONFIG_KEXEC_CORE, so I updated all the architecture Kconfig with a new option KEXEC_CORE, and let KEXEC selects KEXEC_CORE in arch Kconfig. Also updated general kernel code with to kexec_load syscall. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Dave Young Cc: Eric W. Biederman Cc: Vivek Goyal Cc: Petr Tesarik Cc: Theodore Ts'o Cc: Josh Boyer Cc: David Howells Cc: Geert Uytterhoeven Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-09-01T16:04:31+00:00

Pull x86 boot updates from Ingo Molnar: "The main x86 bootup related changes in this cycle were: - more boot time optimizations. (Len Brown) - implement hex output to allow the debugging of early bootup parameters. (Kees Cook) - remove obsolete MCA leftovers. (Paolo Pisati)" * 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/smpboot: Remove APIC.wait_for_init_deassert and atomic init_deasserted x86/smpboot: Remove SIPI delays from cpu_up() x86/smpboot: Remove udelay(100) when polling cpu_callin_map x86/smpboot: Remove udelay(100) when polling cpu_initialized_map x86/boot: Obsolete the MCA sys_desc_table x86/boot: Add hex output for debugging

Merge tag 'v4.2-rc7' into x86/boot, to refresh the branch before merging new changes

2015-08-17T08:41:59+00:00

Signed-off-by: Ingo Molnar

Merge branch 'x86/urgent' into x86/asm, before applying dependent patches

2015-07-31T08:23:35+00:00

Signed-off-by: Ingo Molnar

x86/efi: Use all 64 bit of efi_memmap in setup_e820()

2015-07-30T17:07:10+00:00

The efi_info structure stores low 32 bits of memory map in efi_memmap and high 32 bits in efi_memmap_hi. While constructing pointer in the setup_e820(), need to take into account all 64 bit of the pointer. It is because on 64bit machine the function efi_get_memory_map() may return full 64bit pointer and before the patch that pointer was truncated. The issue is triggered on Parallles virtual machine and fixed with this patch. Signed-off-by: Dmitry Skorodumov Cc: Denis V. Lunev Cc: Signed-off-by: Matt Fleming

x86/boot: Obsolete the MCA sys_desc_table

2015-07-21T08:55:11+00:00

The kernel does not support the MCA bus anymroe, so mark sys_desc_table as obsolete: remove any reference from the code together with the remaining of MCA logic. bloat-o-meter output: add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-55 (-55) function old new delta i386_start_kernel 128 119 -9 setup_arch 1421 1375 -46 Signed-off-by: Paolo Pisati Cc: Josh Triplett Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1437409430-8491-1-git-send-email-p.pisati@gmail.com Signed-off-by: Ingo Molnar

x86/boot: Add hex output for debugging

2015-07-07T06:59:05+00:00

This is useful for reporting various addresses or other values while debugging early boot, for example, the recent kernel image size vs kernel run size. For example, when CONFIG_X86_VERBOSE_BOOTUP is set, this is now visible at boot time: early console in setup code early console in decompress_kernel input_data: 0x0000000001e1526e input_len: 0x0000000000732236 output: 0x0000000001000000 output_len: 0x0000000001535640 run_size: 0x00000000021fb000 KASLR using RDTSC... Signed-off-by: Kees Cook Cc: Andrey Ryabinin Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Jan Beulich Cc: Jiri Kosina Cc: Joe Perches Cc: Josh Triplett Cc: Junjie Mao Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Vivek Goyal Cc: Yinghai Lu Link: http://lkml.kernel.org/r/20150706230620.GA17501@www.outflux.net Signed-off-by: Ingo Molnar

x86/asm/tsc: Rename native_read_tsc() to rdtsc()

2015-07-06T13:23:28+00:00

Now that there is no paravirt TSC, the "native" is inappropriate. The function does RDTSC, so give it the obvious name: rdtsc(). Suggested-by: Borislav Petkov Signed-off-by: Andy Lutomirski Signed-off-by: Borislav Petkov Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Huang Rui Cc: John Stultz Cc: Len Brown Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Ralf Baechle Cc: Thomas Gleixner Cc: kvm ML Link: http://lkml.kernel.org/r/fd43e16281991f096c1e4d21574d9e1402c62d39.1434501121.git.luto@kernel.org [ Ported it to v4.2-rc1. ] Signed-off-by: Ingo Molnar