mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 23:05:23 +07:00
533b220f7b
- Branch Target Identification (BTI)
* Support for ARMv8.5-BTI in both user- and kernel-space. This
allows branch targets to limit the types of branch from which
they can be called and additionally prevents branching to
arbitrary code, although kernel support requires a very recent
toolchain.
* Function annotation via SYM_FUNC_START() so that assembly
functions are wrapped with the relevant "landing pad"
instructions.
* BPF and vDSO updates to use the new instructions.
* Addition of a new HWCAP and exposure of BTI capability to
userspace via ID register emulation, along with ELF loader
support for the BTI feature in .note.gnu.property.
* Non-critical fixes to CFI unwind annotations in the sigreturn
trampoline.
- Shadow Call Stack (SCS)
* Support for Clang's Shadow Call Stack feature, which reserves
platform register x18 to point at a separate stack for each
task that holds only return addresses. This protects function
return control flow from buffer overruns on the main stack.
* Save/restore of x18 across problematic boundaries (user-mode,
hypervisor, EFI, suspend, etc).
* Core support for SCS, should other architectures want to use it
too.
* SCS overflow checking on context-switch as part of the existing
stack limit check if CONFIG_SCHED_STACK_END_CHECK=y.
- CPU feature detection
* Removed numerous "SANITY CHECK" errors when running on a system
with mismatched AArch32 support at EL1. This is primarily a
concern for KVM, which disabled support for 32-bit guests on
such a system.
* Addition of new ID registers and fields as the architecture has
been extended.
- Perf and PMU drivers
* Minor fixes and cleanups to system PMU drivers.
- Hardware errata
* Unify KVM workarounds for VHE and nVHE configurations.
* Sort vendor errata entries in Kconfig.
- Secure Monitor Call Calling Convention (SMCCC)
* Update to the latest specification from Arm (v1.2).
* Allow PSCI code to query the SMCCC version.
- Software Delegated Exception Interface (SDEI)
* Unexport a bunch of unused symbols.
* Minor fixes to handling of firmware data.
- Pointer authentication
* Add support for dumping the kernel PAC mask in vmcoreinfo so
that the stack can be unwound by tools such as kdump.
* Simplification of key initialisation during CPU bringup.
- BPF backend
* Improve immediate generation for logical and add/sub
instructions.
- vDSO
- Minor fixes to the linker flags for consistency with other
architectures and support for LLVM's unwinder.
- Clean up logic to initialise and map the vDSO into userspace.
- ACPI
- Work around for an ambiguity in the IORT specification relating
to the "num_ids" field.
- Support _DMA method for all named components rather than only
PCIe root complexes.
- Minor other IORT-related fixes.
- Miscellaneous
* Initialise debug traps early for KGDB and fix KDB cacheflushing
deadlock.
* Minor tweaks to early boot state (documentation update, set
TEXT_OFFSET to 0x0, increase alignment of PE/COFF sections).
* Refactoring and cleanup
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon:
"A sizeable pile of arm64 updates for 5.8.
Summary below, but the big two features are support for Branch Target
Identification and Clang's Shadow Call stack. The latter is currently
arm64-only, but the high-level parts are all in core code so it could
easily be adopted by other architectures pending toolchain support
Branch Target Identification (BTI):
- Support for ARMv8.5-BTI in both user- and kernel-space. This allows
branch targets to limit the types of branch from which they can be
called and additionally prevents branching to arbitrary code,
although kernel support requires a very recent toolchain.
- Function annotation via SYM_FUNC_START() so that assembly functions
are wrapped with the relevant "landing pad" instructions.
- BPF and vDSO updates to use the new instructions.
- Addition of a new HWCAP and exposure of BTI capability to userspace
via ID register emulation, along with ELF loader support for the
BTI feature in .note.gnu.property.
- Non-critical fixes to CFI unwind annotations in the sigreturn
trampoline.
Shadow Call Stack (SCS):
- Support for Clang's Shadow Call Stack feature, which reserves
platform register x18 to point at a separate stack for each task
that holds only return addresses. This protects function return
control flow from buffer overruns on the main stack.
- Save/restore of x18 across problematic boundaries (user-mode,
hypervisor, EFI, suspend, etc).
- Core support for SCS, should other architectures want to use it
too.
- SCS overflow checking on context-switch as part of the existing
stack limit check if CONFIG_SCHED_STACK_END_CHECK=y.
CPU feature detection:
- Removed numerous "SANITY CHECK" errors when running on a system
with mismatched AArch32 support at EL1. This is primarily a concern
for KVM, which disabled support for 32-bit guests on such a system.
- Addition of new ID registers and fields as the architecture has
been extended.
Perf and PMU drivers:
- Minor fixes and cleanups to system PMU drivers.
Hardware errata:
- Unify KVM workarounds for VHE and nVHE configurations.
- Sort vendor errata entries in Kconfig.
Secure Monitor Call Calling Convention (SMCCC):
- Update to the latest specification from Arm (v1.2).
- Allow PSCI code to query the SMCCC version.
Software Delegated Exception Interface (SDEI):
- Unexport a bunch of unused symbols.
- Minor fixes to handling of firmware data.
Pointer authentication:
- Add support for dumping the kernel PAC mask in vmcoreinfo so that
the stack can be unwound by tools such as kdump.
- Simplification of key initialisation during CPU bringup.
BPF backend:
- Improve immediate generation for logical and add/sub instructions.
vDSO:
- Minor fixes to the linker flags for consistency with other
architectures and support for LLVM's unwinder.
- Clean up logic to initialise and map the vDSO into userspace.
ACPI:
- Work around for an ambiguity in the IORT specification relating to
the "num_ids" field.
- Support _DMA method for all named components rather than only PCIe
root complexes.
- Minor other IORT-related fixes.
Miscellaneous:
- Initialise debug traps early for KGDB and fix KDB cacheflushing
deadlock.
- Minor tweaks to early boot state (documentation update, set
TEXT_OFFSET to 0x0, increase alignment of PE/COFF sections).
- Refactoring and cleanup"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (148 commits)
KVM: arm64: Move __load_guest_stage2 to kvm_mmu.h
KVM: arm64: Check advertised Stage-2 page size capability
arm64/cpufeature: Add get_arm64_ftr_reg_nowarn()
ACPI/IORT: Remove the unused __get_pci_rid()
arm64/cpuinfo: Add ID_MMFR4_EL1 into the cpuinfo_arm64 context
arm64/cpufeature: Add remaining feature bits in ID_AA64PFR1 register
arm64/cpufeature: Add remaining feature bits in ID_AA64PFR0 register
arm64/cpufeature: Add remaining feature bits in ID_AA64ISAR0 register
arm64/cpufeature: Add remaining feature bits in ID_MMFR4 register
arm64/cpufeature: Add remaining feature bits in ID_PFR0 register
arm64/cpufeature: Introduce ID_MMFR5 CPU register
arm64/cpufeature: Introduce ID_DFR1 CPU register
arm64/cpufeature: Introduce ID_PFR2 CPU register
arm64/cpufeature: Make doublelock a signed feature in ID_AA64DFR0
arm64/cpufeature: Drop TraceFilt feature exposure from ID_DFR0 register
arm64/cpufeature: Add explicit ftr_id_isar0[] for ID_ISAR0 register
arm64: mm: Add asid_gen_match() helper
firmware: smccc: Fix missing prototype warning for arm_smccc_version_init
arm64: vdso: Fix CFI directives in sigreturn trampoline
arm64: vdso: Don't prefix sigreturn trampoline with a BTI C instruction
...
169 lines
6.2 KiB
C
169 lines
6.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_TRAPS_H
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#define _ASM_X86_TRAPS_H
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#include <linux/context_tracking_state.h>
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#include <linux/kprobes.h>
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#include <asm/debugreg.h>
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#include <asm/siginfo.h> /* TRAP_TRACE, ... */
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#define dotraplinkage __visible
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asmlinkage void divide_error(void);
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asmlinkage void debug(void);
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asmlinkage void nmi(void);
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asmlinkage void int3(void);
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asmlinkage void overflow(void);
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asmlinkage void bounds(void);
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asmlinkage void invalid_op(void);
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asmlinkage void device_not_available(void);
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#ifdef CONFIG_X86_64
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asmlinkage void double_fault(void);
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#endif
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asmlinkage void coprocessor_segment_overrun(void);
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asmlinkage void invalid_TSS(void);
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asmlinkage void segment_not_present(void);
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asmlinkage void stack_segment(void);
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asmlinkage void general_protection(void);
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asmlinkage void page_fault(void);
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asmlinkage void async_page_fault(void);
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asmlinkage void spurious_interrupt_bug(void);
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asmlinkage void coprocessor_error(void);
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asmlinkage void alignment_check(void);
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#ifdef CONFIG_X86_MCE
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asmlinkage void machine_check(void);
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#endif /* CONFIG_X86_MCE */
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asmlinkage void simd_coprocessor_error(void);
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#if defined(CONFIG_X86_64) && defined(CONFIG_XEN_PV)
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asmlinkage void xen_divide_error(void);
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asmlinkage void xen_xennmi(void);
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asmlinkage void xen_xendebug(void);
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asmlinkage void xen_int3(void);
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asmlinkage void xen_overflow(void);
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asmlinkage void xen_bounds(void);
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asmlinkage void xen_invalid_op(void);
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asmlinkage void xen_device_not_available(void);
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asmlinkage void xen_double_fault(void);
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asmlinkage void xen_coprocessor_segment_overrun(void);
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asmlinkage void xen_invalid_TSS(void);
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asmlinkage void xen_segment_not_present(void);
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asmlinkage void xen_stack_segment(void);
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asmlinkage void xen_general_protection(void);
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asmlinkage void xen_page_fault(void);
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asmlinkage void xen_spurious_interrupt_bug(void);
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asmlinkage void xen_coprocessor_error(void);
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asmlinkage void xen_alignment_check(void);
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#ifdef CONFIG_X86_MCE
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asmlinkage void xen_machine_check(void);
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#endif /* CONFIG_X86_MCE */
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asmlinkage void xen_simd_coprocessor_error(void);
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#endif
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dotraplinkage void do_divide_error(struct pt_regs *regs, long error_code);
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dotraplinkage void do_debug(struct pt_regs *regs, long error_code);
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dotraplinkage void do_nmi(struct pt_regs *regs, long error_code);
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dotraplinkage void do_int3(struct pt_regs *regs, long error_code);
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dotraplinkage void do_overflow(struct pt_regs *regs, long error_code);
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dotraplinkage void do_bounds(struct pt_regs *regs, long error_code);
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dotraplinkage void do_invalid_op(struct pt_regs *regs, long error_code);
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dotraplinkage void do_device_not_available(struct pt_regs *regs, long error_code);
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dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code, unsigned long cr2);
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dotraplinkage void do_coprocessor_segment_overrun(struct pt_regs *regs, long error_code);
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dotraplinkage void do_invalid_TSS(struct pt_regs *regs, long error_code);
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dotraplinkage void do_segment_not_present(struct pt_regs *regs, long error_code);
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dotraplinkage void do_stack_segment(struct pt_regs *regs, long error_code);
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dotraplinkage void do_general_protection(struct pt_regs *regs, long error_code);
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dotraplinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code, unsigned long address);
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dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *regs, long error_code);
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dotraplinkage void do_coprocessor_error(struct pt_regs *regs, long error_code);
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dotraplinkage void do_alignment_check(struct pt_regs *regs, long error_code);
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dotraplinkage void do_simd_coprocessor_error(struct pt_regs *regs, long error_code);
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#ifdef CONFIG_X86_32
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dotraplinkage void do_iret_error(struct pt_regs *regs, long error_code);
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#endif
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dotraplinkage void do_mce(struct pt_regs *regs, long error_code);
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#ifdef CONFIG_X86_64
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asmlinkage __visible notrace struct pt_regs *sync_regs(struct pt_regs *eregs);
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asmlinkage __visible notrace
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struct bad_iret_stack *fixup_bad_iret(struct bad_iret_stack *s);
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void __init trap_init(void);
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#endif
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static inline int get_si_code(unsigned long condition)
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{
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if (condition & DR_STEP)
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return TRAP_TRACE;
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else if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3))
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return TRAP_HWBKPT;
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else
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return TRAP_BRKPT;
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}
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extern int panic_on_unrecovered_nmi;
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void math_emulate(struct math_emu_info *);
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#ifndef CONFIG_X86_32
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asmlinkage void smp_thermal_interrupt(struct pt_regs *regs);
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asmlinkage void smp_threshold_interrupt(struct pt_regs *regs);
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asmlinkage void smp_deferred_error_interrupt(struct pt_regs *regs);
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#endif
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void smp_apic_timer_interrupt(struct pt_regs *regs);
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void smp_spurious_interrupt(struct pt_regs *regs);
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void smp_error_interrupt(struct pt_regs *regs);
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asmlinkage void smp_irq_move_cleanup_interrupt(void);
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#ifdef CONFIG_VMAP_STACK
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void __noreturn handle_stack_overflow(const char *message,
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struct pt_regs *regs,
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unsigned long fault_address);
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#endif
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/* Interrupts/Exceptions */
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enum {
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X86_TRAP_DE = 0, /* 0, Divide-by-zero */
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X86_TRAP_DB, /* 1, Debug */
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X86_TRAP_NMI, /* 2, Non-maskable Interrupt */
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X86_TRAP_BP, /* 3, Breakpoint */
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X86_TRAP_OF, /* 4, Overflow */
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X86_TRAP_BR, /* 5, Bound Range Exceeded */
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X86_TRAP_UD, /* 6, Invalid Opcode */
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X86_TRAP_NM, /* 7, Device Not Available */
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X86_TRAP_DF, /* 8, Double Fault */
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X86_TRAP_OLD_MF, /* 9, Coprocessor Segment Overrun */
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X86_TRAP_TS, /* 10, Invalid TSS */
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X86_TRAP_NP, /* 11, Segment Not Present */
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X86_TRAP_SS, /* 12, Stack Segment Fault */
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X86_TRAP_GP, /* 13, General Protection Fault */
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X86_TRAP_PF, /* 14, Page Fault */
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X86_TRAP_SPURIOUS, /* 15, Spurious Interrupt */
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X86_TRAP_MF, /* 16, x87 Floating-Point Exception */
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X86_TRAP_AC, /* 17, Alignment Check */
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X86_TRAP_MC, /* 18, Machine Check */
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X86_TRAP_XF, /* 19, SIMD Floating-Point Exception */
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X86_TRAP_IRET = 32, /* 32, IRET Exception */
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};
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/*
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* Page fault error code bits:
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*
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* bit 0 == 0: no page found 1: protection fault
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* bit 1 == 0: read access 1: write access
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* bit 2 == 0: kernel-mode access 1: user-mode access
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* bit 3 == 1: use of reserved bit detected
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* bit 4 == 1: fault was an instruction fetch
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* bit 5 == 1: protection keys block access
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*/
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enum x86_pf_error_code {
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X86_PF_PROT = 1 << 0,
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X86_PF_WRITE = 1 << 1,
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X86_PF_USER = 1 << 2,
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X86_PF_RSVD = 1 << 3,
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X86_PF_INSTR = 1 << 4,
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X86_PF_PK = 1 << 5,
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};
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#endif /* _ASM_X86_TRAPS_H */
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