Re: [PATCH] x86/kexec: always ensure EFI systab region is mapped

2019-04-23 Thread Dave Young
On 04/24/19 at 01:41pm, Baoquan He wrote: > On 04/24/19 at 02:47am, Junichi Nomura wrote: > > On 4/24/19 2:15 AM, Kairui Song wrote: > > > On Mon, Apr 22, 2019 at 11:21 PM Junichi Nomura > > > wrote: > > >> Is the mapping of ACPI tables just by luck, too? > > > > > > Good question, they should h

Re: [PATCH] x86/kexec: always ensure EFI systab region is mapped

2019-04-23 Thread Dave Young
On 04/23/19 at 06:20am, Junichi Nomura wrote: > On 4/22/19 6:28 PM, Kairui Song wrote: > > The reason is the systab region is not mapped by the identity mapping > > provided by kexec. Currently kexec only create identity mapping for > > mem regions, wihch won't cover the systab. So second kernel wi