diff options
Diffstat (limited to 'arch/mips/kvm/vz.c')
| -rw-r--r-- | arch/mips/kvm/vz.c | 120 |
1 files changed, 92 insertions, 28 deletions
diff --git a/arch/mips/kvm/vz.c b/arch/mips/kvm/vz.c index 33bb8c6e1b05..21f4495feb15 100644 --- a/arch/mips/kvm/vz.c +++ b/arch/mips/kvm/vz.c @@ -2747,37 +2747,73 @@ static unsigned int kvm_vz_resize_guest_vtlb(unsigned int size) static int kvm_vz_hardware_enable(void) { unsigned int mmu_size, guest_mmu_size, ftlb_size; + u64 guest_cvmctl, cvmvmconfig; + + switch (current_cpu_type()) { + case CPU_CAVIUM_OCTEON3: + /* Set up guest timer/perfcount IRQ lines */ + guest_cvmctl = read_gc0_cvmctl(); + guest_cvmctl &= ~CVMCTL_IPTI; + guest_cvmctl |= 7ull << CVMCTL_IPTI_SHIFT; + guest_cvmctl &= ~CVMCTL_IPPCI; + guest_cvmctl |= 6ull << CVMCTL_IPPCI_SHIFT; + write_gc0_cvmctl(guest_cvmctl); + + cvmvmconfig = read_c0_cvmvmconfig(); + /* No I/O hole translation. */ + cvmvmconfig |= CVMVMCONF_DGHT; + /* Halve the root MMU size */ + mmu_size = ((cvmvmconfig & CVMVMCONF_MMUSIZEM1) + >> CVMVMCONF_MMUSIZEM1_S) + 1; + guest_mmu_size = mmu_size / 2; + mmu_size -= guest_mmu_size; + cvmvmconfig &= ~CVMVMCONF_RMMUSIZEM1; + cvmvmconfig |= mmu_size - 1; + write_c0_cvmvmconfig(cvmvmconfig); + + /* Update our records */ + current_cpu_data.tlbsize = mmu_size; + current_cpu_data.tlbsizevtlb = mmu_size; + current_cpu_data.guest.tlbsize = guest_mmu_size; + + /* Flush moved entries in new (guest) context */ + kvm_vz_local_flush_guesttlb_all(); + break; + default: + /* + * ImgTec cores tend to use a shared root/guest TLB. To avoid + * overlap of root wired and guest entries, the guest TLB may + * need resizing. + */ + mmu_size = current_cpu_data.tlbsizevtlb; + ftlb_size = current_cpu_data.tlbsize - mmu_size; - /* - * ImgTec cores tend to use a shared root/guest TLB. To avoid overlap of - * root wired and guest entries, the guest TLB may need resizing. - */ - mmu_size = current_cpu_data.tlbsizevtlb; - ftlb_size = current_cpu_data.tlbsize - mmu_size; - - /* Try switching to maximum guest VTLB size for flush */ - guest_mmu_size = kvm_vz_resize_guest_vtlb(mmu_size); - current_cpu_data.guest.tlbsize = guest_mmu_size + ftlb_size; - kvm_vz_local_flush_guesttlb_all(); + /* Try switching to maximum guest VTLB size for flush */ + guest_mmu_size = kvm_vz_resize_guest_vtlb(mmu_size); + current_cpu_data.guest.tlbsize = guest_mmu_size + ftlb_size; + kvm_vz_local_flush_guesttlb_all(); - /* - * Reduce to make space for root wired entries and at least 2 root - * non-wired entries. This does assume that long-term wired entries - * won't be added later. - */ - guest_mmu_size = mmu_size - num_wired_entries() - 2; - guest_mmu_size = kvm_vz_resize_guest_vtlb(guest_mmu_size); - current_cpu_data.guest.tlbsize = guest_mmu_size + ftlb_size; + /* + * Reduce to make space for root wired entries and at least 2 + * root non-wired entries. This does assume that long-term wired + * entries won't be added later. + */ + guest_mmu_size = mmu_size - num_wired_entries() - 2; + guest_mmu_size = kvm_vz_resize_guest_vtlb(guest_mmu_size); + current_cpu_data.guest.tlbsize = guest_mmu_size + ftlb_size; - /* - * Write the VTLB size, but if another CPU has already written, check it - * matches or we won't provide a consistent view to the guest. If this - * ever happens it suggests an asymmetric number of wired entries. - */ - if (cmpxchg(&kvm_vz_guest_vtlb_size, 0, guest_mmu_size) && - WARN(guest_mmu_size != kvm_vz_guest_vtlb_size, - "Available guest VTLB size mismatch")) - return -EINVAL; + /* + * Write the VTLB size, but if another CPU has already written, + * check it matches or we won't provide a consistent view to the + * guest. If this ever happens it suggests an asymmetric number + * of wired entries. + */ + if (cmpxchg(&kvm_vz_guest_vtlb_size, 0, guest_mmu_size) && + WARN(guest_mmu_size != kvm_vz_guest_vtlb_size, + "Available guest VTLB size mismatch")) + return -EINVAL; + break; + } /* * Enable virtualization features granting guest direct control of @@ -2814,8 +2850,36 @@ static int kvm_vz_hardware_enable(void) static void kvm_vz_hardware_disable(void) { + u64 cvmvmconfig; + unsigned int mmu_size; + + /* Flush any remaining guest TLB entries */ kvm_vz_local_flush_guesttlb_all(); + switch (current_cpu_type()) { + case CPU_CAVIUM_OCTEON3: + /* + * Allocate whole TLB for root. Existing guest TLB entries will + * change ownership to the root TLB. We should be safe though as + * they've already been flushed above while in guest TLB. + */ + cvmvmconfig = read_c0_cvmvmconfig(); + mmu_size = ((cvmvmconfig & CVMVMCONF_MMUSIZEM1) + >> CVMVMCONF_MMUSIZEM1_S) + 1; + cvmvmconfig &= ~CVMVMCONF_RMMUSIZEM1; + cvmvmconfig |= mmu_size - 1; + write_c0_cvmvmconfig(cvmvmconfig); + + /* Update our records */ + current_cpu_data.tlbsize = mmu_size; + current_cpu_data.tlbsizevtlb = mmu_size; + current_cpu_data.guest.tlbsize = 0; + + /* Flush moved entries in new (root) context */ + local_flush_tlb_all(); + break; + } + if (cpu_has_guestid) { write_c0_guestctl1(0); kvm_vz_local_flush_roottlb_all_guests(); |