wireguard-linux/arch/arm64/kernel/machine_kexec_file.c, branch jd/orphan-parallel

memblock: reduce number of parameters in for_each_mem_range()

2020-10-14T01:38:35Z

Currently for_each_mem_range() and for_each_mem_range_rev() iterators are the most generic way to traverse memblock regions. As such, they have 8 parameters and they are hardly convenient to users. Most users choose to utilize one of their wrappers and the only user that actually needs most of the parameters is memblock itself. To avoid yet another naming for memblock iterators, rename the existing for_each_mem_range[_rev]() to __for_each_mem_range[_rev]() and add a new for_each_mem_range[_rev]() wrappers with only index, start and end parameters. The new wrapper nicely fits into init_unavailable_mem() and will be used in upcoming changes to simplify memblock traversals. Signed-off-by: Mike Rapoport Signed-off-by: Andrew Morton Acked-by: Thomas Bogendoerfer [MIPS] Cc: Andy Lutomirski Cc: Baoquan He Cc: Benjamin Herrenschmidt Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christoph Hellwig Cc: Daniel Axtens Cc: Dave Hansen Cc: Emil Renner Berthing Cc: Hari Bathini Cc: Ingo Molnar Cc: Ingo Molnar Cc: Jonathan Cameron Cc: Marek Szyprowski Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Miguel Ojeda Cc: Palmer Dabbelt Cc: Paul Mackerras Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Russell King Cc: Stafford Horne Cc: Thomas Gleixner Cc: Will Deacon Cc: Yoshinori Sato Link: https://lkml.kernel.org/r/20200818151634.14343-11-rppt@kernel.org Signed-off-by: Linus Torvalds

arm64: kexec_file: Use struct_size() in kmalloc()

2020-06-18T09:45:20Z

Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes. This code was detected with the help of Coccinelle and, audited and fixed manually. Signed-off-by: Gustavo A. R. Silva Link: https://lore.kernel.org/r/20200617213407.GA1385@embeddedor Signed-off-by: Will Deacon

arm64: kexec_file: print appropriate variable

2020-04-30T20:31:22Z

The value of kbuf->memsz may be different than kbuf->bufsz after calling kexec_add_buffer(). Hence both values should be logged. Fixes: 52b2a8af74360 ("arm64: kexec_file: load initrd and device-tree") Fixes: 3751e728cef29 ("arm64: kexec_file: add crash dump support") Signed-off-by: Łukasz Stelmach Cc: AKASHI Takahiro Cc: James Morse Cc: Bhupesh Sharma Link: https://lore.kernel.org/r/20200430163142.27282-2-l.stelmach@samsung.com Signed-off-by: Will Deacon

arm64: kexec_file: Avoid temp buffer for RNG seed

2020-04-28T12:55:51Z

After using get_random_bytes(), you want to wipe the buffer afterward so the seed remains secret. In this case, we can eliminate the temporary buffer entirely. fdt_setprop_placeholder() returns a pointer to the property value buffer, allowing us to put the random data directly in there without using a temporary buffer at all. Faster and less stack all in one. Signed-off-by: George Spelvin Acked-by: Will Deacon Cc: Hsin-Yi Wang Cc: Catalin Marinas Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20200330173801.GA9199@SDF.ORG Signed-off-by: Will Deacon

arm64: kexec_file: Fixed code style.

2020-03-17T18:23:20Z

Remove unnecessary blank. Signed-off-by: Li Tao Signed-off-by: Catalin Marinas

arm64: kexec_file: add crash dump support

2020-01-08T17:05:23Z

Enabling crash dump (kdump) includes * prepare contents of ELF header of a core dump file, /proc/vmcore, using crash_prepare_elf64_headers(), and * add two device tree properties, "linux,usable-memory-range" and "linux,elfcorehdr", which represent respectively a memory range to be used by crash dump kernel and the header's location Signed-off-by: AKASHI Takahiro Cc: Catalin Marinas Cc: Will Deacon Reviewed-by: James Morse Tested-and-reviewed-by: Bhupesh Sharma Signed-off-by: Will Deacon

Merge branches 'for-next/52-bit-kva', 'for-next/cpu-topology', 'for-next/error-injection', 'for-next/perf', 'for-next/psci-cpuidle', 'for-next/rng', 'for-next/smpboot', 'for-next/tbi' and 'for-next/tlbi' into for-next/core

2019-08-30T11:46:12Z

* for-next/52-bit-kva: (25 commits) Support for 52-bit virtual addressing in kernel space * for-next/cpu-topology: (9 commits) Move CPU topology parsing into core code and add support for ACPI 6.3 * for-next/error-injection: (2 commits) Support for function error injection via kprobes * for-next/perf: (8 commits) Support for i.MX8 DDR PMU and proper SMMUv3 group validation * for-next/psci-cpuidle: (7 commits) Move PSCI idle code into a new CPUidle driver * for-next/rng: (4 commits) Support for 'rng-seed' property being passed in the devicetree * for-next/smpboot: (3 commits) Reduce fragility of secondary CPU bringup in debug configurations * for-next/tbi: (10 commits) Introduce new syscall ABI with relaxed requirements for pointer tags * for-next/tlbi: (6 commits) Handle spurious page faults arising from kernel space

arm64: kexec_file: add rng-seed support

2019-08-23T15:40:14Z

Adding "rng-seed" to dtb. It's fine to add this property if original fdt doesn't contain it. Since original seed will be wiped after read, so use a default size 128 bytes here. Signed-off-by: Hsin-Yi Wang Reviewed-by: Stephen Boyd Signed-off-by: Will Deacon

arm64/kexec: Use consistent convention of initializing 'kxec_buf.mem' with KEXEC_BUF_MEM_UNKNOWN

2019-08-05T10:06:33Z

With commit b6664ba42f14 ("s390, kexec_file: drop arch_kexec_mem_walk()"), we introduced the KEXEC_BUF_MEM_UNKNOWN macro. If kexec_buf.mem is set to this value, kexec_locate_mem_hole() will try to allocate free memory. While other arch(s) like s390 and x86_64 already use this macro to initialize kexec_buf.mem with, arm64 uses an equivalent value of 0. Replace it with KEXEC_BUF_MEM_UNKNOWN, to keep the convention of initializing 'kxec_buf.mem' consistent across various archs. Cc: takahiro.akashi@linaro.org Cc: james.morse@arm.com Reviewed-by: Matthias Brugger Signed-off-by: Bhupesh Sharma Signed-off-by: Will Deacon

arm64: kexec_file: handle empty command-line

2019-02-05T09:34:49Z

Calling strlen() on cmdline == NULL produces a kernel oops. Since having a NULL cmdline is valid, handle this case explicitly. Fixes: 52b2a8af7436 ("arm64: kexec_file: load initrd and device-tree") Signed-off-by: Jean-Philippe Brucker Signed-off-by: Will Deacon