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KVM: arm64: Share arm64 code with s390

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Mark functions that s390 can use to implement arm on s390 as shared
functions.

No functional change.

Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Link: https://patch.msgid.link/20260930173441.66762-12-seiden@linux.ibm.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Steffen Eiden 2026-09-30 19:34:26 +02:00 committed by Marc Zyngier
parent c7e18ba462
commit dcb776bfcc
3 changed files with 11 additions and 0 deletions
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3
arch/arm64/kvm/arm.c
View File

@ -1603,6 +1603,7 @@ static unsigned long system_supported_vcpu_features(void)
return features;
}
#if ARM64_S390_COMMON == 1
static int kvm_vcpu_init_check_features(struct kvm_vcpu *vcpu,
const struct kvm_vcpu_init *init)
{
@ -1656,6 +1657,8 @@ static bool kvm_vcpu_init_changed(struct kvm_vcpu *vcpu,
KVM_VCPU_MAX_FEATURES);
}
#endif /* ARM64_S390_COMMON == 1 */
static int kvm_setup_vcpu(struct kvm_vcpu *vcpu)
{
struct kvm *kvm = vcpu->kvm;

6
arch/arm64/kvm/guest.c
View File

@ -62,6 +62,7 @@ const struct kvm_stats_header kvm_vcpu_stats_header = {
sizeof(kvm_vcpu_stats_desc),
};
#if ARM64_S390_COMMON == 1
static bool core_reg_offset_is_vreg(u64 off)
{
return off >= KVM_REG_ARM_CORE_REG(fp_regs.vregs) &&
@ -306,6 +307,8 @@ static int set_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
return err;
}
#endif /* ARM64_S390_COMMON == 1 */
#define vq_word(vq) (((vq) - SVE_VQ_MIN) / 64)
#define vq_mask(vq) ((u64)1 << ((vq) - SVE_VQ_MIN) % 64)
#define vq_present(vqs, vq) (!!((vqs)[vq_word(vq)] & vq_mask(vq)))
@ -543,6 +546,7 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
return -EINVAL;
}
#if ARM64_S390_COMMON == 1
static int copy_core_reg_indices(const struct kvm_vcpu *vcpu,
u64 __user *uindices)
{
@ -591,6 +595,8 @@ static unsigned long num_core_regs(const struct kvm_vcpu *vcpu)
return copy_core_reg_indices(vcpu, NULL);
}
#endif /* ARM64_S390_COMMON == 1 */
static unsigned long num_sve_regs(const struct kvm_vcpu *vcpu)
{
const unsigned int slices = vcpu_sve_slices(vcpu);

2
arch/arm64/kvm/mmio.c
View File

@ -10,6 +10,7 @@
#include "trace.h"
#if ARM64_S390_COMMON == 1
void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data)
{
void *datap = NULL;
@ -258,3 +259,4 @@ int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa)
run->exit_reason = KVM_EXIT_MMIO;
return 0;
}
#endif /* ARM64_S390_COMMON == 1 */