https://github.com/torvalds/linux
Revision 67feaba413ec68daf4124e9870878899b4ed9a0e authored by Dan Williams on 23 September 2022, 22:05:56 UTC, committed by Dan Williams on 25 September 2022, 01:05:53 UTC
The "hmem" platform-devices that are created to represent the platform-advertised "Soft Reserved" memory ranges end up inserting a resource that causes the iomem_resource tree to look like this: 340000000-43fffffff : hmem.0 340000000-43fffffff : Soft Reserved 340000000-43fffffff : dax0.0 This is because insert_resource() reparents ranges when they completely intersect an existing range. This matters because code that uses region_intersects() to scan for a given IORES_DESC will only check that top-level 'hmem.0' resource and not the 'Soft Reserved' descendant. So, to support EINJ (via einj_error_inject()) to inject errors into memory hosted by a dax-device, be sure to describe the memory as IORES_DESC_SOFT_RESERVED. This is a follow-on to: commit b13a3e5fd40b ("ACPI: APEI: Fix _EINJ vs EFI_MEMORY_SP") ...that fixed EINJ support for "Soft Reserved" ranges in the first instance. Fixes: 262b45ae3ab4 ("x86/efi: EFI soft reservation to E820 enumeration") Reported-by: Ricardo Sandoval Torres <ricardo.sandoval.torres@intel.com> Tested-by: Ricardo Sandoval Torres <ricardo.sandoval.torres@intel.com> Cc: <stable@vger.kernel.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Omar Avelar <omar.avelar@intel.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Mark Gross <markgross@kernel.org> Link: https://lore.kernel.org/r/166397075670.389916.7435722208896316387.stgit@dwillia2-xfh.jf.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
1 parent 521a547
Tip revision: 67feaba413ec68daf4124e9870878899b4ed9a0e authored by Dan Williams on 23 September 2022, 22:05:56 UTC
devdax: Fix soft-reservation memory description
devdax: Fix soft-reservation memory description
Tip revision: 67feaba
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init | ||
io_uring | ||
ipc | ||
kernel | ||
lib | ||
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net | ||
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.cocciconfig | -rw-r--r-- | 59 bytes |
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.gitignore | -rw-r--r-- | 1.9 KB |
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COPYING | -rw-r--r-- | 496 bytes |
CREDITS | -rw-r--r-- | 99.1 KB |
Kbuild | -rw-r--r-- | 1.3 KB |
Kconfig | -rw-r--r-- | 555 bytes |
MAINTAINERS | -rw-r--r-- | 664.6 KB |
Makefile | -rw-r--r-- | 64.4 KB |
README | -rw-r--r-- | 727 bytes |
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