From: Borislav Petkov <bp@alien8.de>
To: lijiang <lijiang@redhat.com>
Cc: linux-kernel@vger.kernel.org, kexec@lists.infradead.org,
tglx@linutronix.de, mingo@redhat.com, x86@kernel.org,
bhe@redhat.com, dyoung@redhat.com
Subject: Re: [PATCH] kdump, vmcoreinfo: Export sme_me_mask value to vmcoreinfo
Date: Fri, 26 Oct 2018 18:35:54 +0200 [thread overview]
Message-ID: <20181026163554.GA26331@nazgul.tnic> (raw)
In-Reply-To: <1263471c-a27d-a698-15f0-b5947f13ea93@redhat.com>
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...
Ok, it uses vmcoreinfo to exclude pages which would mean, it accesses
the first kernel's pagetable and traverses it.
Am I close?
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
--
next prev parent reply other threads:[~2018-10-26 16:35 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-26 9:36 [PATCH] kdump, vmcoreinfo: Export sme_me_mask value to vmcoreinfo Lianbo Jiang
2018-10-26 9:43 ` Boris Petkov
2018-10-26 12:32 ` lijiang
2018-10-26 16:24 ` Petr Tesarik
2018-10-26 22:25 ` Borislav Petkov
2018-10-27 2:57 ` lijiang
2018-10-27 8:13 ` Baoquan He
2018-10-27 9:10 ` Borislav Petkov
2018-10-27 9:39 ` Baoquan He
2018-10-27 10:12 ` Borislav Petkov
2018-10-27 11:08 ` Baoquan He
2018-10-27 13:17 ` Boris Petkov
2018-10-27 14:41 ` lijiang
2018-10-27 14:51 ` Borislav Petkov
2018-10-29 7:59 ` lijiang
2018-10-29 8:31 ` Baoquan He
2018-10-29 9:29 ` lijiang
2018-10-29 9:57 ` Borislav Petkov
2018-10-29 10:12 ` lijiang
2018-10-29 11:44 ` Baoquan He
2018-10-29 13:41 ` lijiang
2018-10-29 13:49 ` Borislav Petkov
2018-10-30 4:46 ` lijiang
2018-10-30 5:09 ` Dave Young
2018-10-30 9:15 ` Borislav Petkov
2018-10-30 9:23 ` Baoquan He
2018-10-31 2:26 ` lijiang
2018-10-31 2:47 ` Dave Young
2018-10-31 7:43 ` lijiang
2018-10-31 10:10 ` Borislav Petkov
2018-11-01 15:01 ` Kazuhito Hagio
2018-10-26 16:35 ` Borislav Petkov [this message]
2018-10-27 2:19 ` lijiang
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