The patchset did two things: [1] add a new variable 'sme_mask' to number_table
The variable will be used to store the sme mask for crashed kernel, the sme_mask denotes whether the old memory is encrypted or not. [2] remove the memory encryption mask to obtain the true physical address For AMD machine with SME feature, if SME is enabled in the first kernel, the crashed kernel's page table(pgd/pud/pmd/pte) contains the memory encryption mask, so makedumpfile needs to remove the memory encryption mask to obtain the true physical address. References: x86/kdump: Export the SME mask to vmcoreinfo https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=65f750e5457aef9a8085a99d613fea0430303e93 https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=f263245a0ce2c4e23b89a58fa5f7dfc048e11929 Lianbo Jiang (2): Makedumpfile: add a new variable 'sme_mask' to number_table Remove the memory encryption mask to obtain the true physical address arch/x86_64.c | 3 +++ makedumpfile.c | 4 ++++ makedumpfile.h | 1 + 3 files changed, 8 insertions(+) -- 2.17.1 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
