Since kernel commit e6e094e053af75 ("x86/acpi, x86/boot: Take RSDP address from boot params if available"), kernel accept an acpi_rsdp_addr param in boot_params. So fill in this parameter unconditionally, ensure second kernel always get the right RSDP address consistently, and boot well on EFI system even with EFI service disabled. User no longer need to change the kernel cmdline to workaround the missing RSDP issue. For older version of kernels (Before 5.0), there won't be any change of behavior. Signed-off-by: Kairui Song <kasong@xxxxxxxxxx> --- kexec/arch/i386/x86-linux-setup.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kexec/arch/i386/x86-linux-setup.c b/kexec/arch/i386/x86-linux-setup.c index 5ca7c25..5b00b42 100644 --- a/kexec/arch/i386/x86-linux-setup.c +++ b/kexec/arch/i386/x86-linux-setup.c @@ -901,4 +901,7 @@ void setup_linux_system_parameters(struct kexec_info *info, /* fill the EDD information */ setup_edd_info(real_mode); + + /* Always try to fill acpi_rsdp_addr */ + real_mode->acpi_rsdp_addr = get_acpi_rsdp(); } -- 2.21.0 _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec