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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-11-24 12:15:44 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-11-24 12:15:44 -0800 |
| commit | 80145ac2f739558e66bd8789df3414bc0e111c58 (patch) | |
| tree | b6bdcc7803c625a1253e99731d0140b0a6415c15 | |
| parent | b1489422041ba58f224270480d8241be24f0f8dd (diff) | |
| parent | 1179f170b6f0af7bb0b3b7628136eaac450ddf31 (diff) | |
| download | linux-80145ac2f739558e66bd8789df3414bc0e111c58.tar.bz2 | |
Merge tag 's390-5.10-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fix from Heiko Carstens:
"Disable interrupts when restoring fpu and vector registers, otherwise
KVM guests might see corrupted register contents"
* tag 's390-5.10-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390: fix fpu restore in entry.S
| -rw-r--r-- | arch/s390/kernel/asm-offsets.c | 10 | ||||
| -rw-r--r-- | arch/s390/kernel/entry.S | 2 |
2 files changed, 7 insertions, 5 deletions
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c index 2012c1cf0853..483051e10db3 100644 --- a/arch/s390/kernel/asm-offsets.c +++ b/arch/s390/kernel/asm-offsets.c @@ -53,11 +53,11 @@ int main(void) /* stack_frame offsets */ OFFSET(__SF_BACKCHAIN, stack_frame, back_chain); OFFSET(__SF_GPRS, stack_frame, gprs); - OFFSET(__SF_EMPTY, stack_frame, empty1); - OFFSET(__SF_SIE_CONTROL, stack_frame, empty1[0]); - OFFSET(__SF_SIE_SAVEAREA, stack_frame, empty1[1]); - OFFSET(__SF_SIE_REASON, stack_frame, empty1[2]); - OFFSET(__SF_SIE_FLAGS, stack_frame, empty1[3]); + OFFSET(__SF_EMPTY, stack_frame, empty1[0]); + OFFSET(__SF_SIE_CONTROL, stack_frame, empty1[1]); + OFFSET(__SF_SIE_SAVEAREA, stack_frame, empty1[2]); + OFFSET(__SF_SIE_REASON, stack_frame, empty1[3]); + OFFSET(__SF_SIE_FLAGS, stack_frame, empty1[4]); BLANK(); OFFSET(__VDSO_GETCPU_VAL, vdso_per_cpu_data, getcpu_val); BLANK(); diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 5346545b9860..26bb0603c5a1 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -1068,6 +1068,7 @@ EXPORT_SYMBOL(save_fpu_regs) * %r4 */ load_fpu_regs: + stnsm __SF_EMPTY(%r15),0xfc lg %r4,__LC_CURRENT aghi %r4,__TASK_thread TSTMSK __LC_CPU_FLAGS,_CIF_FPU @@ -1099,6 +1100,7 @@ load_fpu_regs: .Lload_fpu_regs_done: ni __LC_CPU_FLAGS+7,255-_CIF_FPU .Lload_fpu_regs_exit: + ssm __SF_EMPTY(%r15) BR_EX %r14 .Lload_fpu_regs_end: ENDPROC(load_fpu_regs) |