Hello Sai and others,
The change to use early_mem*() instead of early_io*() in 50a0cb56 does
not work on my machine. Last week I discussed some BGRT changes and I
created a patch for that, but can't test it on efi-next because of this.
I get this (when booting 50a0cb56, without any of my changes):
[ 0.026936] ------------[ cut here ]------------
[ 0.026941] WARNING: CPU: 0 PID: 0 at mm/early_ioremap.c:137
__early_ioremap+0x102/0x1bb()
[ 0.026941] Modules linked in:
[ 0.026944] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.0-rc1 #2
[ 0.026945] Hardware name: Dell Inc. XPS 13 9343/09K8G1, BIOS A05
07/14/2015
[ 0.026946] 0000000000000000 900f03d5a116524d ffffffff81c03e60
ffffffff813a3fff
[ 0.026948] 0000000000000000 ffffffff81c03e98 ffffffff810a0852
00000000d7b76000
[ 0.026949] 0000000000000000 0000000000000001 0000000000000001
000000000000017c
[ 0.026951] Call Trace:
[ 0.026955] [<ffffffff813a3fff>] dump_stack+0x44/0x55
[ 0.026958] [<ffffffff810a0852>] warn_slowpath_common+0x82/0xc0
[ 0.026959] [<ffffffff810a099a>] warn_slowpath_null+0x1a/0x20
[ 0.026961] [<ffffffff81d8c395>] __early_ioremap+0x102/0x1bb
[ 0.026962] [<ffffffff81d8c602>] early_memremap+0x13/0x15
[ 0.026964] [<ffffffff81d78361>] efi_bgrt_init+0x162/0x1ad
[ 0.026966] [<ffffffff81d778ec>] efi_late_init+0x9/0xb
[ 0.026968] [<ffffffff81d58ff5>] start_kernel+0x46f/0x49f
[ 0.026970] [<ffffffff81d58120>] ? early_idt_handler_array+0x120/0x120
[ 0.026972] [<ffffffff81d58339>] x86_64_start_reservations+0x2a/0x2c
[ 0.026974] [<ffffffff81d58485>] x86_64_start_kernel+0x14a/0x16d
[ 0.026977] ---[ end trace f9b3812eb8e24c58 ]---
[ 0.026978] efi_bgrt: Ignoring BGRT: failed to map image memory
This is the second early_memremap call in efi_bgrt_init triggering
WARN_ON(nrpages > NR_FIX_BTMAPS). Can you comment on this?
Greetings,
Môshe van der Sterre
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