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Merge branches 'for-next/acpi', 'for-next/cpufeatures', 'for-next/csum', 'for-next/e0pd', 'for-next/entry', 'for-next/kbuild', 'for-next/kexec/cleanup', 'for-next/kexec/file-kdump', 'for-next/misc', 'for-next/nofpsimd', 'for-next/perf' and 'for-next/scs' into for-next/core

Browse Source 
* for-next/acpi:
  ACPI/IORT: Fix 'Number of IDs' handling in iort_id_map()

* for-next/cpufeatures: (2 commits)
  arm64: Introduce ID_ISAR6 CPU register
  ...

* for-next/csum: (2 commits)
  arm64: csum: Fix pathological zero-length calls
  ...

* for-next/e0pd: (7 commits)
  arm64: kconfig: Fix alignment of E0PD help text
  ...

* for-next/entry: (5 commits)
  arm64: entry: cleanup sp_el0 manipulation
  ...

* for-next/kbuild: (4 commits)
  arm64: kbuild: remove compressed images on 'make ARCH=arm64 (dist)clean'
  ...

* for-next/kexec/cleanup: (11 commits)
  Revert "arm64: kexec: make dtb_mem always enabled"
  ...

* for-next/kexec/file-kdump: (2 commits)
  arm64: kexec_file: add crash dump support
  ...

* for-next/misc: (12 commits)
  arm64: entry: Avoid empty alternatives entries
  ...

* for-next/nofpsimd: (7 commits)
  arm64: nofpsmid: Handle TIF_FOREIGN_FPSTATE flag cleanly
  ...

* for-next/perf: (2 commits)
  perf/imx_ddr: Fix cpu hotplug state cleanup
  ...

* for-next/scs: (6 commits)
  arm64: kernel: avoid x18 in __cpu_soft_restart
  ...
This commit is contained in:
Will Deacon
2020-01-22 11:32:31 +00:00
parent 3c23b83a88 8e3747beff c2c24edb1d e717d93b1c 3e3934176a d7bbd6c1b0 1595fe299e 3751e728ce 108eae2d4d 52f73c383b 9ee68b314e 500d14affd
commit 4f6cdf296c
64 changed files with 958 additions and 386 deletions
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arch/arm64/kernel/entry.S
+9 -12
View File
@@ -60,16 +60,16 @@
.macro kernel_ventry, el, label, regsize = 64
.align 7
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
alternative_if ARM64_UNMAP_KERNEL_AT_EL0
.if \el == 0
alternative_if ARM64_UNMAP_KERNEL_AT_EL0
.if \regsize == 64
mrs x30, tpidrro_el0
msr tpidrro_el0, xzr
.else
mov x30, xzr
.endif
.endif
alternative_else_nop_endif
.endif
#endif
sub sp, sp, #S_FRAME_SIZE
@@ -167,9 +167,13 @@ alternative_cb_end
.if \el == 0
clear_gp_regs
mrs x21, sp_el0
ldr_this_cpu tsk, __entry_task, x20 // Ensure MDSCR_EL1.SS is clear,
ldr x19, [tsk, #TSK_TI_FLAGS] // since we can unmask debug
disable_step_tsk x19, x20 // exceptions when scheduling.
ldr_this_cpu tsk, __entry_task, x20
msr sp_el0, tsk
// Ensure MDSCR_EL1.SS is clear, since we can unmask debug exceptions
// when scheduling.
ldr x19, [tsk, #TSK_TI_FLAGS]
disable_step_tsk x19, x20
apply_ssbd 1, x22, x23
@@ -232,13 +236,6 @@ alternative_else_nop_endif
str w21, [sp, #S_SYSCALLNO]
.endif
/*
* Set sp_el0 to current thread_info.
*/
.if \el == 0
msr sp_el0, tsk
.endif
/* Save pmr */
alternative_if ARM64_HAS_IRQ_PRIO_MASKING
mrs_s x20, SYS_ICC_PMR_EL1