diff options
| author | Heiko Carstens <hca@linux.ibm.com> | 2024-02-03 11:45:09 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2024-02-16 14:30:15 +0100 |
| commit | 419abc4d3828813b58d047da146f519eedaa395b (patch) | |
| tree | b358423efb377ffd2c050aab1ab2e41740ba44ab /arch/s390/kvm | |
| parent | 918c7cad66509c2170e38a088550fb4a525e0878 (diff) | |
| download | linux-419abc4d3828813b58d047da146f519eedaa395b.tar.gz linux-419abc4d3828813b58d047da146f519eedaa395b.tar.bz2 linux-419abc4d3828813b58d047da146f519eedaa395b.zip | |
s390/fpu: convert FPU CIF flag to regular TIF flag
The FPU state, as represented by the CIF_FPU flag reflects the FPU state of
a task, not the CPU it is running on. Therefore convert the flag to a
regular TIF flag.
This removes the magic in switch_to() where a save_fpu_regs() call for the
currently (previous) running task sets the per-cpu CIF_FPU flag, which is
required to restore FPU register contents of the next task, when it returns
to user space.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/kvm')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 2 | ||||
| -rw-r--r-- | arch/s390/kvm/vsie.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 8f4414539756..0cee7192a1c2 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -4829,7 +4829,7 @@ static int __vcpu_run(struct kvm_vcpu *vcpu) vcpu->run->s.regs.gprs, sizeof(sie_page->pv_grregs)); } - if (test_cpu_flag(CIF_FPU)) + if (test_thread_flag(TIF_FPU)) load_fpu_regs(); exit_reason = sie64a(vcpu->arch.sie_block, vcpu->run->s.regs.gprs); diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 457d92c2949a..b8a242360ed0 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -1149,7 +1149,7 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) */ vcpu->arch.sie_block->prog0c |= PROG_IN_SIE; barrier(); - if (test_cpu_flag(CIF_FPU)) + if (test_thread_flag(TIF_FPU)) load_fpu_regs(); if (!kvm_s390_vcpu_sie_inhibited(vcpu)) rc = sie64a(scb_s, vcpu->run->s.regs.gprs); |