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diff --git a/mail-blurb.txt b/mail-blurb.txt new file mode 100644 index 00000000000000..c0a774ea94c72b --- /dev/null +++ b/mail-blurb.txt @@ -0,0 +1,193 @@ +Subject: [PATCH v20 00/14] arm64 kexec kernel patches + +This series adds the core support for kexec re-boot and kdump on ARM64. This +version of the series combines Takahiro's kdump patches with my kexec patches. +Please consider all patches for inclusion. + +Takahiro has done some extensive testing for this version with various +configurations af endian, image format, memory options and layouts, etc. + +To load a second stage kernel and execute a kexec re-boot or to work with kdump +on ARM64 systems a series of patches to kexec-tools [2], which have not yet been +merged upstream, are needed. Please update to the latest if you have been using +an older version. + +To examine vmcore (/proc/vmcore), you should use + - gdb v7.7 or later (only useful for non-KASLR kernel) + - crash utility master branch (coming v7.1.6 or later) + +[1] https://git.kernel.org/cgit/linux/kernel/git/geoff/linux-kexec.git +[2] https://git.kernel.org/cgit/linux/kernel/git/geoff/kexec-tools.git + +Changes for v20 (June 23, 2016, 25m): + + o Rebase to Linux-4.7-rc4. + o Add missing break statement in kexec_list_flush. + o Add a check for a return value of parse_crashkernel(). + o Fix a wrong check against misalignment of allocated crash kernel region. + +Changes for v19 (June 16, 2016, 25m): + + o Rebase to Linux-4.7-rc3. + o Added more VMCOREINFO's (VA_BITS, PHYS_OFFSET). + o Remove some unneeded included files. + o Remove kmap() usage. + o Remove kexec_is_dtb() routine. + o Change #ifdef to IS_ENABLED(CONFIG_HOTPLUG_CPU). + o Fix kexec_list_flush() to flush all list entries. + o Use ENTRY(arm64_relocate_new_kernel). + o Remove unused segment start in arm64_relocate_new_kernel. + +Changes for v18 (June 9, 2016, 25m): + + o Rebase to Linux-4.7-rc2. + o Change ret to br in __cpu_soft_restart(). + o Add cpu_install_idmap() call and hyp checks to cpu_soft_restart(). + o Don't return from HVC_SOFT_RESTART. + +Changes for v17 (June 9, 2016, 25m): + + o Rebase to Linux-4.7-rc2. + o Change ret to br in __cpu_soft_restart(). + o Add cpu_install_idmap() call to cpu_soft_restart(). + +Changes for v17 (June 3, 2016, 25m): + + o Rebase to Linux-4.7-rc1. + o Added one VMCOREINFO parameter to vmcore for crash utility. + o Added a check for CPUs stuck in kernel. + o Re-implemented cpu_soft_restart() to be executed only in hyp-stub. + o Added some kernel documentation about added device tree properties. + o Fixed a returned value of pstate in crash_setup_regs(). Now return + a faked pstate since we have no way to get the current pstate. + +Changes for v16 (Apr 14, 2016, 23m): + + o Rebase to Linux-4.6-rc3. + o Don't try to explicitly enter EL2 at machine_kexec() when VHE in use + o Add unreachable() in case of ipi_cpu_crash_stop() + o Add more "#ifdef" to eliminate code unused when !CONFIG_KEXEC_CORE + o Fix a build error around ipi_cpu_crash_stop() when !CONFIG_HOTPLUG_CPU + o Revert "arm64: Add new hcall HVC_CALL_FUNC" + o Revert "Convert hcalls to use HVC immediate value" + (replaced by James' "hyp/kvm: Extend hyp-stub API to allow function calls + at EL2") + + Modified by James: + o Add missing icache maintenance + isb to __kvm_hyp_reset() + o Rework kvm cpu hotplug for VHE + + Added by James: + o arm64: head.S: el2_setup() to accept sctlr_el1 as an argument + o arm64: hyp/kvm: Extend hyp-stub API to allow function calls at EL2 + o arm64: kvm: Move lr save/restore from do_el2_call into EL1 + o arm64: kvm: Move the do_el2_call macro to a header file + +Changes for v15 (Mar 14, 2016, 22m): + + o Rebase to Linux-4.5. + o Remove DEBUG conditional in 'Add pr_debug output'. + +Changes for v14 (Mar 4, 2016, 22m): + + o Rebase to Linux-4.5-rc6. + o Rename setup_mm_for_reboot to cpu_install_idmap. + o kdump: leave non-boot cpus online at crash dump + As we don't have to make non-boot (crashed) cpus offline at crash dump, + this patch adds a variant of smp_send_stop(). + o kdump: use a new device-tree property, "linux,elfcorehdr", instead of + traditional "elfcorehdr=" kernel parameter + o limit memory regions based on DT property, "usable-memory", instead of + "mem=" kernel parameter + o kdump: fix a build error when !CONFIG_KEXEC_CORE + o kvm: use generic kvm_call_hyp() interface instead of kvm_cpu_reset() + o kvm: initialize only a primary cpu at init_hyp_mode() + +Changes for v13 (Jan 15, 2016, 20m): + + o Rebase to Linux-4.4. + o Remove align directive from cpu_reset.c. + o Use inline C wrapper for cpu_soft_restart. + o Revert the new image d-cache flush changes of v10. + o Add SCTLR cleanup patch. + o Change pr_devel to pr_debug. + o Call flush_icache_range() for reboot_code_buffer. + o Add .ltorg directive to arm64_relocate_new_kernel. + o Make new asm macro copy_page. + o Change cache maintenence from inner-shareable to non-shareable. + o Rename KEXEC_ARCH_ARM64 to KEXEC_ARCH_AARCH64. + + o arm64: kvm: allows kvm cpu hotplug + - remove some garbage code from kvm_host.h + o arm64: kdump: reserve memory for crash dump kernel + - change CONFIG_KEXEC to CONFIG_KEXEC_CORE + - don't panic on crash kernel alloc failure + (thanks to Mark Salter, RH) + o arm64: kdump: implement machine_crash_shutdown() + - change "boot/non-boot cpu" to "crashing/non-crashing cpu" + - introduce is_in_crash_kexec() for readability + - re-introduce machine_kexec_mask_interrupts(), as arch/arm has, + to discard unexpected interrupts + - call crash_save_cpu() before making cpus offline to avoid a possible race + (thanks to Pratyush Anand/Mark Salter, RH) + o arm64: kdump: update a kernel doc + - clarify that we support "Image" format as well as vmlinux in kdump.txt + o arm64: kdump: relax BUG_ON() if more than one cpus are still active + - change a warning message at the failure of shooting down non-crahsing cpus + +Changes for v12 (Nov 24, 2015, 18m): + + o No changes, rebase to Linux-4.4-rc2. + +Changes for v11 (Nov 6, 2015, 18m): + + o Rebase to Linux-4.3. + o Move the new image d-cache flush from arm64_relocate_new_kernel to machine_kexec. + o Pass values to arm64_relocate_new_kernel in registers, not in global variables. + o Fixups to setting the sctlr_el1 and sctlr_el2 flags. + +Changes for v10 (Oct 18, 2015, 17m): + + o Rebase to Linux-4.3-rc6. + o Move tcr_set_idmap_t0sz to assembler.h. + o Add back simplified cpu_reset routines. + o Combine kexec + kdump patches. + +Changes for v9 (Apr 7, 2015, 11m): + + o Use new upstream flag IND_FLAGS. + +Changes for v8 (Mar 19, 2015, 10m): + + o Rebase to Linux-4.0-rc4. + o Re-boot using purgatory only. + +Changes for v7 (Jan 16, 2015, 8m): + + o Rebase to Linux-3.19-rc4. + o Change from ESR_EL2_ to ESR_ELx_. + o Remove work-arounds for EFI systems. + +Changes for v6 (Dec 2, 2014, 7m): + + o Rebase to Linux-3.18-rc2 + +Changes for v5 (Nov 16, 2014, 6m): + +Changes for v4 (Oct 3, 2014, 5m): + +Changes for v3 (Sept 23, 2014, 4m): + +Changes for v2 (Sep 9, 2014, 4m): + + o Rebase to Linux-3.17-rc4. + o Move macros from proc-macros.S to assembler.h. + o Convert hcalls to use ISS field. + o Add new hcall HVC_CALL_FUNC. + o Add EL2 switch to soft_restart. + +First submission v1 (May 13, 2014): + + o Based on Linux-3.15-rc4. + +-Geoff |