AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/arm64/kernel
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Dave Martin 0495067420 arm64/sve: Enable SVE state tracking for non-task contexts 
The current FPSIMD/SVE context handling support for non-task (i.e.,
KVM vcpu) contexts does not take SVE into account.  This means that
only task contexts can safely use SVE at present.

In preparation for enabling KVM guests to use SVE, it is necessary
to keep track of SVE state for non-task contexts too.

This patch adds the necessary support, removing assumptions from
the context switch code about the location of the SVE context
storage.

When binding a vcpu context, its vector length is arbitrarily
specified as SVE_VL_MIN for now.  In any case, because TIF_SVE is
presently cleared at vcpu context bind time, the specified vector
length will not be used for anything yet.  In later patches TIF_SVE
will be set here as appropriate, and the appropriate maximum vector
length for the vcpu will be passed when binding.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Julien Grall <julien.grall@arm.com>
Tested-by: zhang.lei <zhang.lei@jp.fujitsu.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2019-03-29 14:41:52 +00:00
..
probes arm64: kprobes: Use arch_populate_kprobe_blacklist() 2019-03-19 12:47:44 +00:00
vdso arm64: Add build salt to the vDSO 2018-07-18 01:18:05 +09:00
.gitignore arm64: Build infrastructure 2012-09-17 13:42:21 +01:00
acpi_numa.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
acpi_parking_protocol.c arm64: fix endianness annotation in acpi_parking_protocol.c 2017-06-29 11:33:15 +01:00
acpi.c arm64: KVM/mm: Move SEA handling behind a single 'claim' interface 2019-02-07 23:10:45 +01:00
alternative.c arm64: alternative: Apply alternatives early in boot process 2019-02-06 10:05:20 +00:00
armv8_deprecated.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
asm-offsets.c arm64: Make PMR part of task context 2019-02-06 10:05:18 +00:00
cacheinfo.c arm64: Add support for ACPI based firmware tables 2018-05-17 17:28:09 +01:00
cpu_errata.c arm64: kpti: Avoid rewriting early page tables when KASLR is enabled 2019-01-10 17:49:35 +00:00
cpu_ops.c arm64: cpu_ops: Add missing 'const' qualifiers 2017-12-01 13:05:08 +00:00
cpu-reset.h arm64: kexec: always reset to EL2 if present 2018-07-04 18:34:24 +01:00
cpu-reset.S arm64: kexec_file: invoke the kernel without purgatory 2018-12-06 14:38:53 +00:00
cpufeature.c arm64/sve: Check SVE virtualisability 2019-03-29 14:41:52 +00:00
cpuidle.c ARM64 / cpuidle: Use new cpuidle macro for entering retention state 2018-01-02 13:50:34 +00:00
cpuinfo.c arm64: add basic pointer authentication support 2018-12-13 16:42:46 +00:00
crash_core.c arm64: kernel: arch_crash_save_vmcoreinfo() should depend on CONFIG_CRASH_CORE 2018-09-11 11:08:49 +01:00
crash_dump.c arm64: kdump: fix small typo 2018-11-02 17:24:17 +00:00
debug-monitors.c signal/arm64: Add and use arm64_force_sig_fault where appropriate 2018-09-27 21:54:43 +02:00
efi-entry.S arm64: Add software workaround for Falkor erratum 1041 2018-02-06 22:53:13 +00:00
efi-header.S arm64: efi: split Image code and data into separate PE/COFF sections 2017-04-04 17:50:59 +01:00
efi-rt-wrapper.S efi/arm64: Check whether x18 is preserved by runtime services calls 2018-03-09 08:58:22 +01:00
efi.c efi/arm64: Check whether x18 is preserved by runtime services calls 2018-03-09 08:58:22 +01:00
entry-fpsimd.S arm64/sve: Write ZCR_EL1 on context switch only if changed 2018-05-17 18:19:53 +01:00
entry-ftrace.S arm64: frace: use asm EXPORT_SYMBOL() 2018-12-10 11:50:12 +00:00
entry.S arm64: Rename get_thread_info() 2019-02-26 16:57:59 +00:00
fpsimd.c arm64/sve: Enable SVE state tracking for non-task contexts 2019-03-29 14:41:52 +00:00
ftrace.c Tracing changes for v4.21: 2018-12-31 11:46:59 -08:00
head.S arm64: Relax GIC version check during early boot 2019-02-20 14:05:37 +00:00
hibernate-asm.S arm64: mm: Offset TTBR1 to allow 52-bit PTRS_PER_PGD 2018-12-10 18:42:17 +00:00
hibernate.c arm64: hibernate: Clean the __hyp_text to PoC after resume 2019-02-01 14:10:02 +00:00
hw_breakpoint.c perf/arch/arm64: Implement hw_breakpoint_arch_parse() 2018-06-26 09:07:56 +02:00
hyp-stub.S arm64: hyp-stub: Forbid kprobing of the hyp-stub 2019-02-01 14:10:01 +00:00
image.h Merge branch 'for-next/kexec' into aarch64/for-next/core 2018-12-10 18:57:17 +00:00
insn.c arm64/insn: add support for emitting ADR/ADRP instructions 2018-11-27 18:47:33 +00:00
io.c arm64: Avoid aligning normal memory pointers in __memcpy_{to,from}io 2017-10-24 16:23:07 +01:00
irq.c arm64: Fix HCR.TGE status for NMI contexts 2019-02-06 10:05:16 +00:00
jump_label.c jump_label: move 'asm goto' support test to Kconfig 2019-01-06 09:46:51 +09:00
kaslr.c arm64: kaslr: ensure randomized quantities are clean also when kaslr is off 2019-02-01 14:07:23 +00:00
kexec_image.c arm64: kexec_file: forbid kdump via kexec_file_load() 2018-12-07 15:28:21 +00:00
kgdb.c arm64: debug: Ensure debug handlers check triggering exception level 2019-03-01 16:23:38 +00:00
kuser32.S arm64: Add __NR_* definitions for compat syscalls 2014-07-10 11:02:40 +01:00
machine_kexec_file.c arm64: kexec_file: handle empty command-line 2019-02-05 09:34:49 +00:00
machine_kexec.c arm64: kdump: no need to mark crashkernel pages manually PG_reserved 2019-03-05 21:07:19 -08:00
Makefile arm64: replace arm64-obj-* in Makefile with obj-* 2019-01-04 10:09:21 +00:00
module-plts.c arm64/module: switch to ADRP/ADD sequences for PLT entries 2018-11-27 19:00:45 +00:00
module.c arm64/module: switch to ADRP/ADD sequences for PLT entries 2018-11-27 19:00:45 +00:00
module.lds arm64: ftrace: emit ftrace-mod.o contents through code 2017-12-01 13:04:59 +00:00
paravirt.c x86/paravirt: Use a single ops structure 2018-09-03 16:50:35 +02:00
pci.c arm64: PCI: Remove node-local allocations when initialising host controller 2018-09-17 16:33:23 -05:00
perf_callchain.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
perf_event.c arm64: perf: remove misleading comment 2019-01-19 22:57:38 +00:00
perf_regs.c compat: Move compat_timespec/ timeval to compat_time.h 2018-04-19 13:29:54 +02:00
pointer_auth.c arm64: ptr auth: Move per-thread keys from thread_info to thread_struct 2018-12-13 16:42:47 +00:00
process.c arm64: Unmask PMR before going idle 2019-02-06 10:05:18 +00:00
psci.c arm64: remove unused asm/compiler.h header file 2018-10-01 11:57:04 +01:00
ptrace.c arm64 updates for 5.1: 2019-03-10 10:17:23 -07:00
reloc_test_core.c arm64: fix undefined reference to 'printk' 2018-03-19 18:14:25 +00:00
reloc_test_syms.S arm64: fix undefined reference to 'printk' 2018-03-19 18:14:25 +00:00
relocate_kernel.S arm64: kexec_file: invoke the kernel without purgatory 2018-12-06 14:38:53 +00:00
return_address.c arm64: Use ftrace_graph_get_ret_stack() instead of curr_ret_stack 2018-12-22 08:21:02 -05:00
sdei.c arm64: sdei: Mark sdei stack helper functions as static 2018-07-31 12:08:22 +01:00
setup.c treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
signal32.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
signal.c arm64: fpsimd: Always set TIF_FOREIGN_FPSTATE on task state flush 2019-03-29 14:41:52 +00:00
sleep.S arm64/mm: Pass ttbr1 as a parameter to __enable_mmu() 2018-09-25 15:10:54 +01:00
smccc-call.S arm64: smccc: use asm EXPORT_SYMBOL() 2018-12-10 11:50:11 +00:00
smp_spin_table.c arm64: Use __pa_symbol for kernel symbols 2017-01-12 15:05:39 +00:00
smp.c arm64: Switch to PMR masking when starting CPUs 2019-02-06 10:05:20 +00:00
ssbd.c arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3 2018-09-14 17:46:19 +01:00
stacktrace.c arm64/stacktrace: Export save_stack_trace_regs() 2019-03-19 14:55:10 +00:00
suspend.c arm64: mm: Support Common Not Private translations 2018-09-18 12:02:27 +01:00
sys32.c arm64: implement syscall wrappers 2018-07-12 14:49:48 +01:00
sys_compat.c arm64 fixes for -rc1 2019-01-05 11:28:39 -08:00
sys.c arm64: implement syscall wrappers 2018-07-12 14:49:48 +01:00
syscall.c arm64: compat: Don't pull syscall number from regs in arm_compat_syscall 2019-01-04 14:18:01 +00:00
time.c arm64: Use ftrace_graph_get_ret_stack() instead of curr_ret_stack 2018-12-22 08:21:02 -05:00
topology.c arm64: topology: re-introduce numa mask check for scheduler MC selection 2018-07-06 13:18:18 +01:00
trace-events-emulation.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
traps.c arm64: Handle serror in NMI context 2019-02-06 10:05:22 +00:00
vdso.c arm64/vdso: Support mremap() for vDSO 2017-08-09 12:16:28 +01:00
vmlinux.lds.S arm64: relocatable: fix inconsistencies in linker script and options 2018-12-04 12:48:25 +00:00