Hi Prabhakar,

On Tue, Nov 19, 2019 at 12:02:46PM +0530, Prabhakar Kushwaha wrote:

Hi Akashi,

On Fri, Nov 15, 2019 at 7:29 AM AKASHI Takahiro
[off-list ref] wrote:

quoted

Bhupesh,

On Fri, Nov 15, 2019 at 01:24:17AM +0530, Bhupesh Sharma wrote:

quoted

Hi Akashi,

On Wed, Nov 13, 2019 at 12:11 PM AKASHI Takahiro
[off-list ref] wrote:

quoted

Hi Bhupesh,

Do you have a corresponding patch for userspace tools,
including crash util and/or makedumpfile?
Otherwise, we can't verify that a generated core file is
correctly handled.

Sure. I am still working on the crash-utility related changes, but you
can find the makedumpfile changes I posted a couple of days ago here
(see [0]) and the github link for the makedumpfile changes can be seen
via [1].

I will post the crash-util changes shortly as well.
Thanks for having a look at the same.

Thank you.
I have tested my kdump patch with a hacked version of crash
where VA_BITS_ACTUAL is calculated from tcr_el1_t1sz in vmcoreinfo.

I also did hack to calculate VA_BITS_ACTUAL is calculated from
tcr_el1_t1sz in vmcoreinfo. Now i am getting error same as mentioned
by you in other thread last month.
https://www.mail-archive.com/crash-utility@redhat.com/msg07385.html

how this error was overcome?

I am using
 - crashkernel: https://github.com/crash-utility/crash.git  commit:
babd7ae62d4e8fd6f93fd30b88040d9376522aa3
and
 - Linux: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
commit: af42d3466bdc8f39806b26f593604fdc54140bcb

# I am rather reluctant to cross-post non-kernel patch to lkml/lakml,

The only change I made to crash utility was:
===8<===

diff --git a/arm64.c b/arm64.c
index 5ee5f1a29a41..84e40aeb561b 100644
--- a/arm64.c
+++ b/arm64.c

@@ -3857,8 +3857,8 @@ arm64_calc_VA_BITS(void)
 		} else if (ACTIVE())
 			error(FATAL, "cannot determine VA_BITS_ACTUAL: please use /proc/kcore\n");
 		else {
-			if ((string = pc->read_vmcoreinfo("NUMBER(VA_BITS_ACTUAL)"))) {
-				value = atol(string);
+			if ((string = pc->read_vmcoreinfo("NUMBER(tcr_el1_t1sz)"))) {
+				value = 64 - strtoll(string, NULL, 0);
 				free(string);
 				machdep->machspec->VA_BITS_ACTUAL = value;
 				machdep->machspec->VA_BITS = value;

===>8===

Thanks,
-Takahiro Akashi

--pk