linux_dsm_epyc7002/arch/x86
Kirill A. Shutemov aad983913d x86/mm/encrypt: Simplify sme_populate_pgd() and sme_populate_pgd_large()
sme_populate_pgd() and sme_populate_pgd_large() operate on the identity
mapping, which means they want virtual addresses to be equal to physical
one, without PAGE_OFFSET shift.

We also need to avoid paravirtualization call there.

Getting this done is tricky. We cannot use usual page table helpers.
It forces us to open-code a lot of things. It makes code ugly and hard
to modify.

We can get it work with the page table helpers, but it requires few
preprocessor tricks.

  - Define __pa() and __va() to be compatible with identity mapping.

  - Undef CONFIG_PARAVIRT and CONFIG_PARAVIRT_SPINLOCKS before including
    any file. This way we can avoid paravirtualization calls.

Now we can user normal page table helpers just fine.

Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20180131135404.40692-3-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-02-13 15:59:49 +01:00
..
boot Merge branch 'next-tpm' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2018-01-31 13:12:31 -08:00
configs
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-02-12 08:57:21 -08:00
entry KVM changes for 4.16 2018-02-10 13:16:35 -08:00
events x86/events/intel/ds: Add PERF_SAMPLE_PERIOD into PEBS_FREERUNNING_FLAGS 2018-02-05 13:48:44 -03:00
hyperv KVM changes for 4.16 2018-02-10 13:16:35 -08:00
ia32
include x86/mm/encrypt: Move page table helpers into separate translation unit 2018-02-13 15:59:48 +01:00
kernel vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
kvm KVM changes for 4.16 2018-02-10 13:16:35 -08:00
lib Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-02-04 11:45:55 -08:00
math-emu
mm x86/mm/encrypt: Simplify sme_populate_pgd() and sme_populate_pgd_large() 2018-02-13 15:59:49 +01:00
net bpf, x86_64: remove obsolete exception handling from div/mod 2018-01-26 16:42:06 -08:00
oprofile Modules updates for v4.15 2017-11-15 13:46:33 -08:00
pci pci-v4.16-changes 2018-02-06 09:59:40 -08:00
platform drm/graphics pull request for v4.16-rc1 2018-02-01 17:48:47 -08:00
power x86: hibernate: fix swsusp_arch_resume() prototype 2018-02-07 12:18:23 +01:00
purgatory
ras
realmode
tools x86/tools: Standardize output format of insn_decode_test 2017-12-12 13:27:47 +01:00
um Merge commit 'upstream-x86-entry' into WIP.x86/mm 2017-12-17 12:58:53 +01:00
video
xen xen: fixes for 4.16 rc1 2018-02-09 10:07:39 -08:00
.gitignore
Kbuild
Kconfig Merge branch 'akpm' (patches from Andrew) 2018-02-06 22:15:42 -08:00
Kconfig.cpu
Kconfig.debug Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-01-30 13:01:09 -08:00
Makefile Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-01-14 15:30:02 -08:00
Makefile_32.cpu
Makefile.um