linux.git/arch/s390/lib, branch v5.19

s390/nospec: build expoline.o for modules_prepare target

2022-07-13T13:21:55+00:00

When CONFIG_EXPOLINE_EXTERN is used expoline thunks are generated
from arch/s390/lib/expoline.S and postlinked into every module.
This is also true for external modules. Add expoline.o build to
the modules_prepare target.

Fixes: 1d2ad084800e ("s390/nospec: add an option to use thunk-extern")
Reported-by: Joe Lawrence 
Tested-by: Sumanth Korikkar 
Acked-by: Sumanth Korikkar 
Tested-by: C. Erastus Toe 
Tested-by: Joe Lawrence 
Link: https://lore.kernel.org/r/patch-1.thread-d13b6c.git-a2387a74dc49.your-ad-here.call-01656331067-ext-4899@work.hours
Signed-off-by: Vasily Gorbik 
Signed-off-by: Alexander Gordeev

s390/alternatives: provide identical sized orginal/alternative sequences

2022-05-17T13:16:28+00:00

Explicitly provide identical sized original/alternative instruction
sequences. This way there is no need for the s390 specific alternatives
infrastructure to generate padding sequences.
The code which generates such sequences will be removed with a follow on
patch.

Acked-by: Vasily Gorbik 
Tested-by: Nathan Chancellor 
Tested-by: Nick Desaulniers 
Link: https://lore.kernel.org/r/20220511120532.2228616-2-hca@linux.ibm.com
Signed-off-by: Heiko Carstens

s390: current_stack_pointer shouldn't be a function

2022-04-12T09:56:08+00:00

s390 defines current_stack_pointer as function while all other
architectures use 'register unsigned long asm("").

This make codes like the following from check_stack_object() fail:

	if (IS_ENABLED(CONFIG_STACK_GROWSUP)) {
		if ((void *)current_stack_pointer < obj + len)
			return BAD_STACK;
	} else {
		if (obj < (void *)current_stack_pointer)
			return BAD_STACK;
	}

because this would compare the address of current_stack_pointer() and
not the stackpointer value.

Reported-by: Karsten Graul 
Fixes: 2792d84e6da5 ("usercopy: Check valid lifetime via stack depth")
Cc: Kees Cook 
Cc: Vasily Gorbik 
Cc: Alexander Gordeev 
Signed-off-by: Sven Schnelle 
Reviewed-by: Heiko Carstens 
Signed-off-by: Heiko Carstens

s390/test_unwind: verify __kretprobe_trampoline is replaced

2022-03-27T20:18:39+00:00

Reviewed-by: Tobias Huschle 
Signed-off-by: Vasily Gorbik

s390/test_unwind: extend kretprobe test

2022-03-27T20:18:39+00:00

Verify unwinding from kretprobed function.

Reviewed-by: Tobias Huschle 
Signed-off-by: Vasily Gorbik

s390/alternatives: use insn format for new instructions

2022-03-27T20:18:39+00:00

Use insn format with instruction format specifier instead of plain
longs. This way it is also more obvious that code instead of data is
generated.

The generated code is identical.

Signed-off-by: Heiko Carstens 
Signed-off-by: Vasily Gorbik

Merge tag 's390-5.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2022-03-25T17:01:34+00:00

Pull s390 updates from Vasily Gorbik:

- Raise minimum supported machine generation to z10, which comes with
various cleanups and code simplifications (usercopy/spectre
mitigation/etc).

- Rework extables and get rid of anonymous out-of-line fixups.

- Page table helpers cleanup. Add set_pXd()/set_pte() helper functions.
Covert pte_val()/pXd_val() macros to functions.

- Optimize kretprobe handling by avoiding extra kprobe on
__kretprobe_trampoline.

- Add support for CEX8 crypto cards.

- Allow to trigger AP bus rescan via writing to /sys/bus/ap/scans.

- Add CONFIG_EXPOLINE_EXTERN option to build the kernel without COMDAT
group sections which simplifies kpatch support.

- Always use the packed stack layout and extend kernel unwinder tests.

- Add sanity checks for ftrace code patching.

- Add s390dbf debug log for the vfio_ap device driver.

- Various virtual vs physical address confusion fixes.

- Various small fixes and improvements all over the code.

* tag 's390-5.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (69 commits)
s390/test_unwind: add kretprobe tests
s390/kprobes: Avoid additional kprobe in kretprobe handling
s390: convert ".insn" encoding to instruction names
s390: assume stckf is always present
s390/nospec: move to single register thunks
s390: raise minimum supported machine generation to z10
s390/uaccess: Add copy_from/to_user_key functions
s390/nospec: align and size extern thunks
s390/nospec: add an option to use thunk-extern
s390/nospec: generate single register thunks if possible
s390/pci: make zpci_set_irq()/zpci_clear_irq() static
s390: remove unused expoline to BC instructions
s390/irq: use assignment instead of cast
s390/traps: get rid of magic cast for per code
s390/traps: get rid of magic cast for program interruption code
s390/signal: fix typo in comments
s390/asm-offsets: remove unused defines
s390/test_unwind: avoid build warning with W=1
s390: remove .fixup section
s390/bpf: encode register within extable entry
...

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2022-03-24T18:58:57+00:00

Pull kvm updates from Paolo Bonzini:
 "ARM:
   - Proper emulation of the OSLock feature of the debug architecture

   - Scalibility improvements for the MMU lock when dirty logging is on

   - New VMID allocator, which will eventually help with SVA in VMs

   - Better support for PMUs in heterogenous systems

   - PSCI 1.1 support, enabling support for SYSTEM_RESET2

   - Implement CONFIG_DEBUG_LIST at EL2

   - Make CONFIG_ARM64_ERRATUM_2077057 default y

   - Reduce the overhead of VM exit when no interrupt is pending

   - Remove traces of 32bit ARM host support from the documentation

   - Updated vgic selftests

   - Various cleanups, doc updates and spelling fixes

  RISC-V:
   - Prevent KVM_COMPAT from being selected

   - Optimize __kvm_riscv_switch_to() implementation

   - RISC-V SBI v0.3 support

  s390:
   - memop selftest

   - fix SCK locking

   - adapter interruptions virtualization for secure guests

   - add Claudio Imbrenda as maintainer

   - first step to do proper storage key checking

  x86:
   - Continue switching kvm_x86_ops to static_call(); introduce
     static_call_cond() and __static_call_ret0 when applicable.

   - Cleanup unused arguments in several functions

   - Synthesize AMD 0x80000021 leaf

   - Fixes and optimization for Hyper-V sparse-bank hypercalls

   - Implement Hyper-V's enlightened MSR bitmap for nested SVM

   - Remove MMU auditing

   - Eager splitting of page tables (new aka "TDP" MMU only) when dirty
     page tracking is enabled

   - Cleanup the implementation of the guest PGD cache

   - Preparation for the implementation of Intel IPI virtualization

   - Fix some segment descriptor checks in the emulator

   - Allow AMD AVIC support on systems with physical APIC ID above 255

   - Better API to disable virtualization quirks

   - Fixes and optimizations for the zapping of page tables:

      - Zap roots in two passes, avoiding RCU read-side critical
        sections that last too long for very large guests backed by 4
        KiB SPTEs.

      - Zap invalid and defunct roots asynchronously via
        concurrency-managed work queue.

      - Allowing yielding when zapping TDP MMU roots in response to the
        root's last reference being put.

      - Batch more TLB flushes with an RCU trick. Whoever frees the
        paging structure now holds RCU as a proxy for all vCPUs running
        in the guest, i.e. to prolongs the grace period on their behalf.
        It then kicks the the vCPUs out of guest mode before doing
        rcu_read_unlock().

  Generic:
   - Introduce __vcalloc and use it for very large allocations that need
     memcg accounting"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (246 commits)
  KVM: use kvcalloc for array allocations
  KVM: x86: Introduce KVM_CAP_DISABLE_QUIRKS2
  kvm: x86: Require const tsc for RT
  KVM: x86: synthesize CPUID leaf 0x80000021h if useful
  KVM: x86: add support for CPUID leaf 0x80000021
  KVM: x86: do not use KVM_X86_OP_OPTIONAL_RET0 for get_mt_mask
  Revert "KVM: x86/mmu: Zap only TDP MMU leafs in kvm_zap_gfn_range()"
  kvm: x86/mmu: Flush TLB before zap_gfn_range releases RCU
  KVM: arm64: fix typos in comments
  KVM: arm64: Generalise VM features into a set of flags
  KVM: s390: selftests: Add error memop tests
  KVM: s390: selftests: Add more copy memop tests
  KVM: s390: selftests: Add named stages for memop test
  KVM: s390: selftests: Add macro as abstraction for MEM_OP
  KVM: s390: selftests: Split memop tests
  KVM: s390x: fix SCK locking
  RISC-V: KVM: Implement SBI HSM suspend call
  RISC-V: KVM: Add common kvm_riscv_vcpu_wfi() function
  RISC-V: Add SBI HSM suspend related defines
  RISC-V: KVM: Implement SBI v0.3 SRST extension
  ...

Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2022-03-21T23:02:36+00:00

Pull crypto updates from Herbert Xu:
"API:
- hwrng core now credits for low-quality RNG devices.

Algorithms:
- Optimisations for neon aes on arm/arm64.
- Add accelerated crc32_be on arm64.
- Add ffdheXYZ(dh) templates.
- Disallow hmac keys < 112 bits in FIPS mode.
- Add AVX assembly implementation for sm3 on x86.

Drivers:
- Add missing local_bh_disable calls for crypto_engine callback.
- Ensure BH is disabled in crypto_engine callback path.
- Fix zero length DMA mappings in ccree.
- Add synchronization between mailbox accesses in octeontx2.
- Add Xilinx SHA3 driver.
- Add support for the TDES IP available on sama7g5 SoC in atmel"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (137 commits)
crypto: xilinx - Turn SHA into a tristate and allow COMPILE_TEST
MAINTAINERS: update HPRE/SEC2/TRNG driver maintainers list
crypto: dh - Remove the unused function dh_safe_prime_dh_alg()
hwrng: nomadik - Change clk_disable to clk_disable_unprepare
crypto: arm64 - cleanup comments
crypto: qat - fix initialization of pfvf rts_map_msg structures
crypto: qat - fix initialization of pfvf cap_msg structures
crypto: qat - remove unneeded assignment
crypto: qat - disable registration of algorithms
crypto: hisilicon/qm - fix memset during queues clearing
crypto: xilinx: prevent probing on non-xilinx hardware
crypto: marvell/octeontx - Use swap() instead of open coding it
crypto: ccree - Fix use after free in cc_cipher_exit()
crypto: ccp - ccp_dmaengine_unregister release dma channels
crypto: octeontx2 - fix missing unlock
hwrng: cavium - fix NULL but dereferenced coccicheck error
crypto: cavium/nitrox - don't cast parameter in bit operations
crypto: vmx - add missing dependencies
MAINTAINERS: Add maintainer for Xilinx ZynqMP SHA3 driver
crypto: xilinx - Add Xilinx SHA3 driver
...

s390/test_unwind: add kretprobe tests

2022-03-10T14:58:17+00:00

Add tests to verify that s390 kretprobes maintain a correct stack
chain and ensure their proper function.

Reviewed-by: Vasily Gorbik 
Signed-off-by: Tobias Huschle 
Signed-off-by: Vasily Gorbik