linux.git/arch/x86/include/asm/set_memory.h, branch v6.2

x86/mm: Implement native set_memory_rox()

2022-12-15T18:37:27+00:00

Provide a native implementation of set_memory_rox(), avoiding the
double set_memory_ro();set_memory_x(); calls.

Suggested-by: Linus Torvalds 
Signed-off-by: Peter Zijlstra (Intel)

x86/mce: relocate set{clear}_mce_nospec() functions

2022-05-16T18:46:44+00:00

Relocate the twin mce functions to arch/x86/mm/pat/set_memory.c
file where they belong.

While at it, fixup a function name in a comment.

Reviewed-by: Christoph Hellwig 
Reviewed-by: Dan Williams 
Signed-off-by: Jane Chu 
Acked-by: Borislav Petkov 
Cc: Stephen Rothwell 
[sfr: gate {set,clear}_mce_nospec() by CONFIG_X86_64]
Link: https://lore.kernel.org/r/165272527328.90175.8336008202048685278.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams

Merge tag 'x86_cleanups_for_v5.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2022-03-21T18:49:16+00:00

Pull x86 cleanups from Borislav Petkov:

 - Remove a misleading message and an unused function

* tag 'x86_cleanups_for_v5.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/nmi: Remove the 'strange power saving mode' hint from unknown NMI handler
  x86/pat: Remove the unused set_pages_array_wt() function

x86/mm/cpa: Generalize __set_memory_enc_pgtable()

2022-02-23T18:14:29+00:00

The kernel provides infrastructure to set or clear the encryption mask
from the pages for AMD SEV, but TDX requires few tweaks.

- TDX and SEV have different requirements to the cache and TLB
  flushing.

- TDX has own routine to notify VMM about page encryption status change.

Modify __set_memory_enc_pgtable() and make it flexible enough to cover
both AMD SEV and Intel TDX. The AMD-specific behavior is isolated in the
callbacks under x86_platform.guest. TDX will provide own version of said
callbacks.

  [ bp: Beat into submission. ]

Signed-off-by: Brijesh Singh 
Signed-off-by: Borislav Petkov 
Acked-by: Kirill A. Shutemov 
Link: https://lore.kernel.org/r/20220223043528.2093214-1-brijesh.singh@amd.com

x86/pat: Remove the unused set_pages_array_wt() function

2022-02-23T12:34:08+00:00

Commit

  623dffb2a2e0 ("x86/mm/pat: Add set_memory_wt() for Write-Through type")

added it but there were no users.

  [ bp: Add a commit message. ]

Signed-off-by: Christoph Hellwig 
Signed-off-by: Borislav Petkov 
Link: https://lore.kernel.org/r/20220223072852.616143-1-hch@lst.de

x86/sgx: Hook arch_memory_failure() into mainline code

2021-11-15T19:13:16+00:00

Add a call inside memory_failure() to call the arch specific code
to check if the address is an SGX EPC page and handle it.

Note the SGX EPC pages do not have a "struct page" entry, so the hook
goes in at the same point as the device mapping hook.

Pull the call to acquire the mutex earlier so the SGX errors are also
protected.

Make set_mce_nospec() skip SGX pages when trying to adjust
the 1:1 map.

Signed-off-by: Tony Luck 
Signed-off-by: Dave Hansen 
Reviewed-by: Jarkko Sakkinen 
Reviewed-by: Naoya Horiguchi 
Tested-by: Reinette Chatre 
Link: https://lkml.kernel.org/r/20211026220050.697075-6-tony.luck@intel.com

mm: x86: Invoke hypercall when page encryption status is changed

2021-11-11T12:37:24+00:00

Invoke a hypercall when a memory region is changed from encrypted ->
decrypted and vice versa. Hypervisor needs to know the page encryption
status during the guest migration.

Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: "H. Peter Anvin" 
Cc: Paolo Bonzini 
Cc: Joerg Roedel 
Cc: Borislav Petkov 
Cc: Tom Lendacky 
Cc: x86@kernel.org
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Steve Rutherford 
Reviewed-by: Venu Busireddy 
Signed-off-by: Brijesh Singh 
Signed-off-by: Ashish Kalra 
Reviewed-by: Borislav Petkov 
Message-Id: <0a237d5bb08793916c7790a3e653a2cbe7485761.1629726117.git.ashish.kalra@amd.com>
Signed-off-by: Paolo Bonzini

x86: Fix various typos in comments, take #2

2021-03-21T22:50:28+00:00

Fix another ~42 single-word typos in arch/x86/ code comments,
missed a few in the first pass, in particular in .S files.

Signed-off-by: Ingo Molnar 
Cc: Borislav Petkov 
Cc: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: Paolo Bonzini 
Cc: Bjorn Helgaas 
Cc: linux-kernel@vger.kernel.org

x86: Fix various typos in comments

2021-03-18T14:31:53+00:00

Fix ~144 single-word typos in arch/x86/ code comments.

Doing this in a single commit should reduce the churn.

Signed-off-by: Ingo Molnar 
Cc: Borislav Petkov 
Cc: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: Paolo Bonzini 
Cc: Bjorn Helgaas 
Cc: linux-kernel@vger.kernel.org

arch, mm: make kernel_page_present() always available

2020-12-15T20:13:43+00:00

For architectures that enable ARCH_HAS_SET_MEMORY having the ability to
verify that a page is mapped in the kernel direct map can be useful
regardless of hibernation.

Add RISC-V implementation of kernel_page_present(), update its forward
declarations and stubs to be a part of set_memory API and remove ugly
ifdefery in inlcude/linux/mm.h around current declarations of
kernel_page_present().

Link: https://lkml.kernel.org/r/20201109192128.960-5-rppt@kernel.org
Signed-off-by: Mike Rapoport 
Acked-by: Kirill A. Shutemov 
Cc: Albert Ou 
Cc: Andy Lutomirski 
Cc: Benjamin Herrenschmidt 
Cc: Borislav Petkov 
Cc: Catalin Marinas 
Cc: Christian Borntraeger 
Cc: Christoph Lameter 
Cc: Dave Hansen 
Cc: David Hildenbrand 
Cc: David Rientjes 
Cc: "David S. Miller" 
Cc: "Edgecombe, Rick P" 
Cc: Heiko Carstens 
Cc: "H. Peter Anvin" 
Cc: Ingo Molnar 
Cc: Joonsoo Kim 
Cc: Len Brown 
Cc: Michael Ellerman 
Cc: Palmer Dabbelt 
Cc: Paul Mackerras 
Cc: Paul Walmsley 
Cc: Pavel Machek 
Cc: Pekka Enberg 
Cc: Peter Zijlstra 
Cc: Rafael J. Wysocki 
Cc: "Rafael J. Wysocki" 
Cc: Thomas Gleixner 
Cc: Vasily Gorbik 
Cc: Vlastimil Babka 
Cc: Will Deacon 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds