[GIT PULL] x86/sgx for v6.0

[Dave Hansen <dave.hansen@linux.intel.com>]

Hi Linus,

Please pull a set of x86/sgx changes focused on implementing the "SGX2"
features, plus a minor cleanup.

These changes conflict with an SGX bug fix that went in during the 5.19
rc cycle.  The resolution is straightforward and comes courtesy of Ingo:

Merge: e0a5915f1cca e0dccc3b76fb
Author: Ingo Molnar <mingo@kernel.org>
Date:   Tue Jul 26 09:14:28 2022 +0200

    Merge tag 'v5.19-rc8' into x86/sgx, to resolve conflicts
    
    There's overlapping modifications to the sgx/encl.h header,
    due to the following upstream fixes:
    
      0c9782e204d3 ("x86/sgx: Set active memcg prior to shmem allocation")
      6bd429643cc2 ("x86/sgx: Disconnect backing page references from dirty status")
    
    Resolve them.
    
    Conflicts:
           arch/x86/kernel/cpu/sgx/encl.h
    
    Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --cc arch/x86/kernel/cpu/sgx/encl.h
index 57cc23602bbb,332ef3568267..a65a952116fd
--- a/arch/x86/kernel/cpu/sgx/encl.h
+++ b/arch/x86/kernel/cpu/sgx/encl.h
@@@ -103,11 -103,13 +103,14 @@@ static inline int sgx_encl_find(struct 
  int sgx_encl_may_map(struct sgx_encl *encl, unsigned long start,
  		     unsigned long end, unsigned long vm_flags);
  
+ bool current_is_ksgxd(void);
  void sgx_encl_release(struct kref *ref);
  int sgx_encl_mm_add(struct sgx_encl *encl, struct mm_struct *mm);
 +const cpumask_t *sgx_encl_cpumask(struct sgx_encl *encl);
- int sgx_encl_get_backing(struct sgx_encl *encl, unsigned long page_index,
- 			 struct sgx_backing *backing);
+ int sgx_encl_lookup_backing(struct sgx_encl *encl, unsigned long page_index,
+ 			    struct sgx_backing *backing);
+ int sgx_encl_alloc_backing(struct sgx_encl *encl, unsigned long page_index,
+ 			   struct sgx_backing *backing);
  void sgx_encl_put_backing(struct sgx_backing *backing);
  int sgx_encl_test_and_clear_young(struct mm_struct *mm,
  				  struct sgx_encl_page *page);

---

The following changes since commit e3a3bbe3e99de73043a1d32d36cf4d211dc58c7e:

  x86/sgx: Ensure no data in PCMD page after truncate (2022-05-16 15:17:57 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tags/x86_sgx_for_v6.0-2022-08-03.1

for you to fetch changes up to e0a5915f1cca21da8ffc0563aea9fa1df5d16fb4:

  x86/sgx: Drop 'page_index' from sgx_backing (2022-07-08 09:31:11 -0700)

----------------------------------------------------------------

 - SGX2 ISA support which makes enclave memory management much more
   dynamic.  For instance, enclaves can now change enclave page
   permissions on the fly.
 - Removal of an unused structure member

----------------------------------------------------------------
Jarkko Sakkinen (1):
      x86/sgx: Export sgx_encl_page_alloc()

Reinette Chatre (30):
      x86/sgx: Add short descriptions to ENCLS wrappers
      x86/sgx: Add wrapper for SGX2 EMODPR function
      x86/sgx: Add wrapper for SGX2 EMODT function
      x86/sgx: Add wrapper for SGX2 EAUG function
      x86/sgx: Support loading enclave page without VMA permissions check
      x86/sgx: Export sgx_encl_ewb_cpumask()
      x86/sgx: Rename sgx_encl_ewb_cpumask() as sgx_encl_cpumask()
      x86/sgx: Move PTE zap code to new sgx_zap_enclave_ptes()
      x86/sgx: Make sgx_ipi_cb() available internally
      x86/sgx: Create utility to validate user provided offset and length
      x86/sgx: Keep record of SGX page type
      x86/sgx: Export sgx_encl_{grow,shrink}()
      x86/sgx: Support VA page allocation without reclaiming
      x86/sgx: Support restricting of enclave page permissions
      x86/sgx: Support adding of pages to an initialized enclave
      x86/sgx: Tighten accessible memory range after enclave initialization
      x86/sgx: Support modifying SGX page type
      x86/sgx: Support complete page removal
      x86/sgx: Free up EPC pages directly to support large page ranges
      Documentation/x86: Introduce enclave runtime management section
      selftests/sgx: Add test for EPCM permission changes
      selftests/sgx: Add test for TCS page permission changes
      selftests/sgx: Test two different SGX2 EAUG flows
      selftests/sgx: Introduce dynamic entry point
      selftests/sgx: Introduce TCS initialization enclave operation
      selftests/sgx: Test complete changing of page type flow
      selftests/sgx: Test faulty enclave behavior
      selftests/sgx: Test invalid access to removed enclave page
      selftests/sgx: Test reclaiming of untouched page
      selftests/sgx: Page removal stress test

Sean Christopherson (1):
      x86/sgx: Drop 'page_index' from sgx_backing

 Documentation/x86/sgx.rst                         |   15 +
 arch/x86/include/asm/sgx.h                        |    8 +
 arch/x86/include/uapi/asm/sgx.h                   |   62 +
 arch/x86/kernel/cpu/sgx/encl.c                    |  330 ++++-
 arch/x86/kernel/cpu/sgx/encl.h                    |   16 +-
 arch/x86/kernel/cpu/sgx/encls.h                   |   33 +
 arch/x86/kernel/cpu/sgx/ioctl.c                   |  641 ++++++++-
 arch/x86/kernel/cpu/sgx/main.c                    |   75 +-
 arch/x86/kernel/cpu/sgx/sgx.h                     |    3 +
 tools/testing/selftests/sgx/defines.h             |   23 +
 tools/testing/selftests/sgx/load.c                |   41 +
 tools/testing/selftests/sgx/main.c                | 1435 +++++++++++++++++++++
 tools/testing/selftests/sgx/main.h                |    1 +
 tools/testing/selftests/sgx/test_encl.c           |   68 +
 tools/testing/selftests/sgx/test_encl_bootstrap.S |    6 +
 15 files changed, 2627 insertions(+), 130 deletions(-)