在 2018年10月16日 10:56, Dave Young 写道: > On 09/21/18 at 03:32pm, Lianbo Jiang wrote: >> E820 reserved ranges is useful in kdump kernel, we have added this in >> kexec-tools code. >> >> One reason is PCI mmconf (extended mode) requires reserved region otherwise >> it falls back to legacy mode. >> >> Furthermore, when AMD SME kdump support, it needs to map dmi table area as >> unencrypted. For normal boot, these ranges sit in e820 reserved ranges, >> thus the early ioremap code naturally map them as unencrypted. If we also >> have same e820 reserve setup in kdump kernel then it will just work like >> normal kernel. >> >> Kdump uses walk_iomem_res_desc to iterate resources, then adds matched desc >> to e820 table for the kdump kernel. >> >> But IORES_DESC_NONE resource type includes several different e820 types, we >> need add exact e820 type to the kdump kernel e820 table, thus it also needs >> an extra checking in memmap_entry_callback() to match the e820 type and >> resource name. >> >> By the way, we also fix an error which walks through iomem resources, the >> values of the function parameter may be modified in the while loop of >> __walk_iomem_res_desc(), which will cause us to not get the desired result >> in some cases. >> >> Changes since v2: >> 1. Modified the value of flags to "0", when walking through the whole >> tree for e820 reserved ranges. >> 2. Modified the invalid SOB chain issue. >> >> Lianbo Jiang (3): >> resource: fix an error which walks through iomem resources >> x86/kexec_file: add e820 entry in case e820 type string matches to io >> resource name >> x86/kexec_file: add reserved e820 ranges to kdump kernel e820 table > > Lianbo, since Bjorn has fixed the resource issue in another patchset, > can you rebase your patch 2 and 3 on top of his patches and resend? > Ok, Thanks for your reminder. I will adjust these patches and post again. Thanks. Lianbo >> >> arch/x86/include/asm/e820/api.h | 2 ++ >> arch/x86/kernel/crash.c | 11 ++++++++++- >> arch/x86/kernel/e820.c | 2 +- >> kernel/resource.c | 3 +++ >> 4 files changed, 16 insertions(+), 2 deletions(-) >> >> -- >> 2.17.1 >> > > Thanks > Dave > _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
