The few changes to kexec-bzimage64.c are to record information needed in advance of when a hotplug event occurs. This information is recorded when the crash/capture kernel is loaded.
In particular, the index of the purgatory segment, and the handful of register context values needed by purgatory, are recorded. Signed-off-by: Eric DeVolder <[email protected]> --- arch/x86/kernel/kexec-bzimage64.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c index 170d0fd68b1f..1886c215215d 100644 --- a/arch/x86/kernel/kexec-bzimage64.c +++ b/arch/x86/kernel/kexec-bzimage64.c @@ -378,6 +378,10 @@ static void *bzImage64_load(struct kimage *image, char *kernel, * Load purgatory. For 64bit entry point, purgatory code can be * anywhere. */ +#ifdef CONFIG_CRASH_HOTPLUG + /* Record the index of the purgatory segment */ + image->arch.hp.purg_index = image->nr_segments; +#endif ret = kexec_load_purgatory(image, &pbuf); if (ret) { pr_err("Loading purgatory failed\n"); @@ -488,6 +492,14 @@ static void *bzImage64_load(struct kimage *image, char *kernel, if (ret) goto out_free_params; +#ifdef CONFIG_CRASH_HOTPLUG + /* Save for use on hotplug to patch up purgatory context */ + image->arch.hp.rbx = regs64.rbx; + image->arch.hp.rsi = regs64.rsi; + image->arch.hp.rip = regs64.rip; + image->arch.hp.rsp = regs64.rsp; +#endif + ret = setup_boot_parameters(image, params, bootparam_load_addr, efi_map_offset, efi_map_sz, efi_setup_data_offset); -- 2.27.0 _______________________________________________ kexec mailing list [email protected] http://lists.infradead.org/mailman/listinfo/kexec
