Messages in this thread | | | Subject | Re: [PATCH] kdump, vmcoreinfo: Export sme_me_mask value to vmcoreinfo | From | lijiang <> | Date | Sat, 27 Oct 2018 10:19:52 +0800 |
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在 2018年10月27日 00:35, Borislav Petkov 写道: > On Fri, Oct 26, 2018 at 08:32:11PM +0800, lijiang wrote: >> If SME is enabled in the first kernel, the crash kernel's page table(pgd/pud/pmd/pte) >> contains the memory encryption mask, so i have to remove the sme mask to obtain the >> true physical address when dump vmcore. > > Sorry, I have no clue what makedumpfile does exactly so you'd have to > be more detailed (or wait until I look at it :)). Which kernel accesses > which kernel's pagetable? > > /me goes and looks at the makedumpfile's manpage... >
So sorry that i should provide more detail about this. Thanks a lot for spending time reading the manpage.
> Ok, it uses vmcoreinfo to exclude pages which would mean, it accesses > the first kernel's pagetable and traverses it. > > Am I close? >
Yes, your explanation is perfect.
Thanks. Lianbo
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