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| author | Heiko Carstens <hca@linux.ibm.com> | 2024-02-03 11:45:17 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2024-02-16 14:30:16 +0100 |
| commit | 066c40918bb495de8f2e45bd7eec06737a142712 (patch) | |
| tree | 4b510a53f7616d9095336cc60e78fcc54f2275a7 /arch/s390/kvm | |
| parent | cad8c3abaac3848f46ba9d1b21f79fab87098da2 (diff) | |
s390/fpu: decrease stack usage for some cases
The kernel_fpu structure has a quite large size of 520 bytes. In order to
reduce stack footprint introduce several kernel fpu structures with
different and also smaller sizes. This way every kernel fpu user must use
the correct variant. A compile time check verifies that the correct variant
is used.
There are several users which use only 16 instead of all 32 vector
registers. For those users the new kernel_fpu_16 structure with a size of
only 266 bytes can be used.
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 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 8467945344b5..8c222b0dfbf2 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -5026,7 +5026,7 @@ static void store_regs(struct kvm_vcpu *vcpu) int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) { struct kvm_run *kvm_run = vcpu->run; - DECLARE_KERNEL_FPU_ONSTACK(fpu); + DECLARE_KERNEL_FPU_ONSTACK32(fpu); int rc; /* |