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| author |   Dan Williams <dan.j.williams@intel.com> | 2018-07-13 21:50:27 -0700 |
|---|---|---|
| committer |   Dave Jiang <dave.jiang@intel.com> | 2018-08-20 09:22:45 -0700 |
| commit | 510ee090abc3dbc862bd35f5f3d8b7284a9117b4 (patch) | |
| tree | d2df0a6b7bc544752629f55255c8823dc3884d90 /arch/x86/kernel/cpu/mcheck | |
| parent | mm, memory_failure: Teach memory_failure() about dev_pagemap pages (diff) | |
| download | linux-dev-510ee090abc3dbc862bd35f5f3d8b7284a9117b4.tar.xz linux-dev-510ee090abc3dbc862bd35f5f3d8b7284a9117b4.zip | |
x86/mm/pat: Prepare {reserve, free}_memtype() for "decoy" addresses
In preparation for using set_memory_uc() instead set_memory_np() for
isolating poison from speculation, teach the memtype code to sanitize
physical addresses vs __PHYSICAL_MASK.
The motivation for using set_memory_uc() for this case is to allow
ongoing access to persistent memory pages via the pmem-driver +
memcpy_mcsafe() until the poison is repaired.
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: <linux-edac@vger.kernel.org>
Cc: <x86@kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Diffstat (limited to 'arch/x86/kernel/cpu/mcheck')
0 files changed, 0 insertions, 0 deletions