xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: PPC: Book3S: Add MMIO emulation for VMX instructions

Browse Source 
This patch provides the MMIO load/store vector indexed
X-Form emulation.

Instructions implemented:
lvx: the quadword in storage addressed by the result of EA &
0xffff_ffff_ffff_fff0 is loaded into VRT.

stvx: the contents of VRS are stored into the quadword in storage
addressed by the result of EA & 0xffff_ffff_ffff_fff0.

Reported-by: Gopesh Kumar Chaudhary <gopchaud@in.ibm.com>
Reported-by: Balamuruhan S <bala24@linux.vnet.ibm.com>
Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Jose Ricardo Ziviani
2018-02-03 18:24:26 -02:00
committed by Paul Mackerras
parent d20fe50a7b
commit 09f984961c
5 changed files with 198 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
arch/powerpc/kvm/emulate_loadstore.c
View File

@@ -58,6 +58,18 @@ static bool kvmppc_check_vsx_disabled(struct kvm_vcpu *vcpu)
}
#endif /* CONFIG_VSX */
#ifdef CONFIG_ALTIVEC
static bool kvmppc_check_altivec_disabled(struct kvm_vcpu *vcpu)
{
if (!(kvmppc_get_msr(vcpu) & MSR_VEC)) {
kvmppc_core_queue_vec_unavail(vcpu);
return true;
}
return false;
}
#endif /* CONFIG_ALTIVEC */
/*
* XXX to do:
* lfiwax, lfiwzx
@@ -98,6 +110,7 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu)
vcpu->arch.mmio_vsx_copy_type = KVMPPC_VSX_COPY_NONE;
vcpu->arch.mmio_sp64_extend = 0;
vcpu->arch.mmio_sign_extend = 0;
vcpu->arch.mmio_vmx_copy_nums = 0;
switch (get_op(inst)) {
case 31:
@@ -459,6 +472,29 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu)
rs, 4, 1);
break;
#endif /* CONFIG_VSX */
#ifdef CONFIG_ALTIVEC
case OP_31_XOP_LVX:
if (kvmppc_check_altivec_disabled(vcpu))
return EMULATE_DONE;
vcpu->arch.vaddr_accessed &= ~0xFULL;
vcpu->arch.paddr_accessed &= ~0xFULL;
vcpu->arch.mmio_vmx_copy_nums = 2;
emulated = kvmppc_handle_load128_by2x64(run, vcpu,
KVM_MMIO_REG_VMX|rt, 1);
break;
case OP_31_XOP_STVX:
if (kvmppc_check_altivec_disabled(vcpu))
return EMULATE_DONE;
vcpu->arch.vaddr_accessed &= ~0xFULL;
vcpu->arch.paddr_accessed &= ~0xFULL;
vcpu->arch.mmio_vmx_copy_nums = 2;
emulated = kvmppc_handle_store128_by2x64(run, vcpu,
rs, 1);
break;
#endif /* CONFIG_ALTIVEC */
default:
emulated = EMULATE_FAIL;
break;