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| author | Heiko Carstens <hca@linux.ibm.com> | 2024-02-03 13:45:13 +0300 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2024-02-16 16:30:16 +0300 |
| commit | ed3a0a011a9c33d81a0d024882ee433c42bfccae (patch) | |
| tree | 0987d6dba643b39e1152bb77b97c1ece26cef3d7 /arch/s390/kvm/vsie.c | |
| parent | 4eed43de9ba0ae3af6716544408d185a152424cd (diff) | |
| download | linux-ed3a0a011a9c33d81a0d024882ee433c42bfccae.tar.xz | |
s390/kvm: convert to regular kernel fpu user
KVM modifies the kernel fpu's regs pointer to its own area to implement its
custom version of preemtible kernel fpu context. With general support for
preemptible kernel fpu context there is no need for the extra complexity in
KVM code anymore.
Therefore convert KVM to a regular kernel fpu user. In particular this
means that all TIF_FPU checks can be removed, since the fpu register
context will never be changed by other kernel fpu users, and also the fpu
register context will be restored if a thread is preempted.
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/kvm/vsie.c')
| -rw-r--r-- | arch/s390/kvm/vsie.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index e0f79c9a4852..3ec11612805d 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -18,7 +18,6 @@ #include <asm/sclp.h> #include <asm/nmi.h> #include <asm/dis.h> -#include <asm/fpu.h> #include <asm/facility.h> #include "kvm-s390.h" #include "gaccess.h" @@ -1149,8 +1148,6 @@ 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_thread_flag(TIF_FPU)) - load_user_fpu_regs(); if (!kvm_s390_vcpu_sie_inhibited(vcpu)) rc = sie64a(scb_s, vcpu->run->s.regs.gprs); barrier(); |