Add book3s_64 guest MMU
To be able to run a guest, we also need to implement a guest MMU. This patch adds MMU handling for Book3s_64 guests. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Alexander Graf
Benjamin Herrenschmidt
parent
0d8dc681c8
commit
e71b2a39af
1 changed files with 476 additions and 0 deletions
476
arch/powerpc/kvm/book3s_64_mmu.c
Normal file
476
arch/powerpc/kvm/book3s_64_mmu.c
Normal file
|
|
@ -0,0 +1,476 @@
|
|||
/*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License, version 2, as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
*
|
||||
* Copyright SUSE Linux Products GmbH 2009
|
||||
*
|
||||
* Authors: Alexander Graf <agraf@suse.de>
|
||||
*/
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/kvm.h>
|
||||
#include <linux/kvm_host.h>
|
||||
#include <linux/highmem.h>
|
||||
|
||||
#include <asm/tlbflush.h>
|
||||
#include <asm/kvm_ppc.h>
|
||||
#include <asm/kvm_book3s.h>
|
||||
|
||||
/* #define DEBUG_MMU */
|
||||
|
||||
#ifdef DEBUG_MMU
|
||||
#define dprintk(X...) printk(KERN_INFO X)
|
||||
#else
|
||||
#define dprintk(X...) do { } while(0)
|
||||
#endif
|
||||
|
||||
static void kvmppc_mmu_book3s_64_reset_msr(struct kvm_vcpu *vcpu)
|
||||
{
|
||||
kvmppc_set_msr(vcpu, MSR_SF);
|
||||
}
|
||||
|
||||
static struct kvmppc_slb *kvmppc_mmu_book3s_64_find_slbe(
|
||||
struct kvmppc_vcpu_book3s *vcpu_book3s,
|
||||
gva_t eaddr)
|
||||
{
|
||||
int i;
|
||||
u64 esid = GET_ESID(eaddr);
|
||||
u64 esid_1t = GET_ESID_1T(eaddr);
|
||||
|
||||
for (i = 0; i < vcpu_book3s->slb_nr; i++) {
|
||||
u64 cmp_esid = esid;
|
||||
|
||||
if (!vcpu_book3s->slb[i].valid)
|
||||
continue;
|
||||
|
||||
if (vcpu_book3s->slb[i].large)
|
||||
cmp_esid = esid_1t;
|
||||
|
||||
if (vcpu_book3s->slb[i].esid == cmp_esid)
|
||||
return &vcpu_book3s->slb[i];
|
||||
}
|
||||
|
||||
dprintk("KVM: No SLB entry found for 0x%lx [%llx | %llx]\n",
|
||||
eaddr, esid, esid_1t);
|
||||
for (i = 0; i < vcpu_book3s->slb_nr; i++) {
|
||||
if (vcpu_book3s->slb[i].vsid)
|
||||
dprintk(" %d: %c%c %llx %llx\n", i,
|
||||
vcpu_book3s->slb[i].valid ? 'v' : ' ',
|
||||
vcpu_book3s->slb[i].large ? 'l' : ' ',
|
||||
vcpu_book3s->slb[i].esid,
|
||||
vcpu_book3s->slb[i].vsid);
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static u64 kvmppc_mmu_book3s_64_ea_to_vp(struct kvm_vcpu *vcpu, gva_t eaddr,
|
||||
bool data)
|
||||
{
|
||||
struct kvmppc_slb *slb;
|
||||
|
||||
slb = kvmppc_mmu_book3s_64_find_slbe(to_book3s(vcpu), eaddr);
|
||||
if (!slb)
|
||||
return 0;
|
||||
|
||||
if (slb->large)
|
||||
return (((u64)eaddr >> 12) & 0xfffffff) |
|
||||
(((u64)slb->vsid) << 28);
|
||||
|
||||
return (((u64)eaddr >> 12) & 0xffff) | (((u64)slb->vsid) << 16);
|
||||
}
|
||||
|
||||
static int kvmppc_mmu_book3s_64_get_pagesize(struct kvmppc_slb *slbe)
|
||||
{
|
||||
return slbe->large ? 24 : 12;
|
||||
}
|
||||
|
||||
static u32 kvmppc_mmu_book3s_64_get_page(struct kvmppc_slb *slbe, gva_t eaddr)
|
||||
{
|
||||
int p = kvmppc_mmu_book3s_64_get_pagesize(slbe);
|
||||
return ((eaddr & 0xfffffff) >> p);
|
||||
}
|
||||
|
||||
static hva_t kvmppc_mmu_book3s_64_get_pteg(
|
||||
struct kvmppc_vcpu_book3s *vcpu_book3s,
|
||||
struct kvmppc_slb *slbe, gva_t eaddr,
|
||||
bool second)
|
||||
{
|
||||
u64 hash, pteg, htabsize;
|
||||
u32 page;
|
||||
hva_t r;
|
||||
|
||||
page = kvmppc_mmu_book3s_64_get_page(slbe, eaddr);
|
||||
htabsize = ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1);
|
||||
|
||||
hash = slbe->vsid ^ page;
|
||||
if (second)
|
||||
hash = ~hash;
|
||||
hash &= ((1ULL << 39ULL) - 1ULL);
|
||||
hash &= htabsize;
|
||||
hash <<= 7ULL;
|
||||
|
||||
pteg = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL;
|
||||
pteg |= hash;
|
||||
|
||||
dprintk("MMU: page=0x%x sdr1=0x%llx pteg=0x%llx vsid=0x%llx\n",
|
||||
page, vcpu_book3s->sdr1, pteg, slbe->vsid);
|
||||
|
||||
r = gfn_to_hva(vcpu_book3s->vcpu.kvm, pteg >> PAGE_SHIFT);
|
||||
if (kvm_is_error_hva(r))
|
||||
return r;
|
||||
return r | (pteg & ~PAGE_MASK);
|
||||
}
|
||||
|
||||
static u64 kvmppc_mmu_book3s_64_get_avpn(struct kvmppc_slb *slbe, gva_t eaddr)
|
||||
{
|
||||
int p = kvmppc_mmu_book3s_64_get_pagesize(slbe);
|
||||
u64 avpn;
|
||||
|
||||
avpn = kvmppc_mmu_book3s_64_get_page(slbe, eaddr);
|
||||
avpn |= slbe->vsid << (28 - p);
|
||||
|
||||
if (p < 24)
|
||||
avpn >>= ((80 - p) - 56) - 8;
|
||||
else
|
||||
avpn <<= 8;
|
||||
|
||||
return avpn;
|
||||
}
|
||||
|
||||
static int kvmppc_mmu_book3s_64_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
|
||||
struct kvmppc_pte *gpte, bool data)
|
||||
{
|
||||
struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
|
||||
struct kvmppc_slb *slbe;
|
||||
hva_t ptegp;
|
||||
u64 pteg[16];
|
||||
u64 avpn = 0;
|
||||
int i;
|
||||
u8 key = 0;
|
||||
bool found = false;
|
||||
bool perm_err = false;
|
||||
int second = 0;
|
||||
|
||||
slbe = kvmppc_mmu_book3s_64_find_slbe(vcpu_book3s, eaddr);
|
||||
if (!slbe)
|
||||
goto no_seg_found;
|
||||
|
||||
do_second:
|
||||
ptegp = kvmppc_mmu_book3s_64_get_pteg(vcpu_book3s, slbe, eaddr, second);
|
||||
if (kvm_is_error_hva(ptegp))
|
||||
goto no_page_found;
|
||||
|
||||
avpn = kvmppc_mmu_book3s_64_get_avpn(slbe, eaddr);
|
||||
|
||||
if(copy_from_user(pteg, (void __user *)ptegp, sizeof(pteg))) {
|
||||
printk(KERN_ERR "KVM can't copy data from 0x%lx!\n", ptegp);
|
||||
goto no_page_found;
|
||||
}
|
||||
|
||||
if ((vcpu->arch.msr & MSR_PR) && slbe->Kp)
|
||||
key = 4;
|
||||
else if (!(vcpu->arch.msr & MSR_PR) && slbe->Ks)
|
||||
key = 4;
|
||||
|
||||
for (i=0; i<16; i+=2) {
|
||||
u64 v = pteg[i];
|
||||
u64 r = pteg[i+1];
|
||||
|
||||
/* Valid check */
|
||||
if (!(v & HPTE_V_VALID))
|
||||
continue;
|
||||
/* Hash check */
|
||||
if ((v & HPTE_V_SECONDARY) != second)
|
||||
continue;
|
||||
|
||||
/* AVPN compare */
|
||||
if (HPTE_V_AVPN_VAL(avpn) == HPTE_V_AVPN_VAL(v)) {
|
||||
u8 pp = (r & HPTE_R_PP) | key;
|
||||
int eaddr_mask = 0xFFF;
|
||||
|
||||
gpte->eaddr = eaddr;
|
||||
gpte->vpage = kvmppc_mmu_book3s_64_ea_to_vp(vcpu,
|
||||
eaddr,
|
||||
data);
|
||||
if (slbe->large)
|
||||
eaddr_mask = 0xFFFFFF;
|
||||
gpte->raddr = (r & HPTE_R_RPN) | (eaddr & eaddr_mask);
|
||||
gpte->may_execute = ((r & HPTE_R_N) ? false : true);
|
||||
gpte->may_read = false;
|
||||
gpte->may_write = false;
|
||||
|
||||
switch (pp) {
|
||||
case 0:
|
||||
case 1:
|
||||
case 2:
|
||||
case 6:
|
||||
gpte->may_write = true;
|
||||
/* fall through */
|
||||
case 3:
|
||||
case 5:
|
||||
case 7:
|
||||
gpte->may_read = true;
|
||||
break;
|
||||
}
|
||||
|
||||
if (!gpte->may_read) {
|
||||
perm_err = true;
|
||||
continue;
|
||||
}
|
||||
|
||||
dprintk("KVM MMU: Translated 0x%lx [0x%llx] -> 0x%llx "
|
||||
"-> 0x%llx\n",
|
||||
eaddr, avpn, gpte->vpage, gpte->raddr);
|
||||
found = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Update PTE R and C bits, so the guest's swapper knows we used the
|
||||
* page */
|
||||
if (found) {
|
||||
u32 oldr = pteg[i+1];
|
||||
|
||||
if (gpte->may_read) {
|
||||
/* Set the accessed flag */
|
||||
pteg[i+1] |= HPTE_R_R;
|
||||
}
|
||||
if (gpte->may_write) {
|
||||
/* Set the dirty flag */
|
||||
pteg[i+1] |= HPTE_R_C;
|
||||
} else {
|
||||
dprintk("KVM: Mapping read-only page!\n");
|
||||
}
|
||||
|
||||
/* Write back into the PTEG */
|
||||
if (pteg[i+1] != oldr)
|
||||
copy_to_user((void __user *)ptegp, pteg, sizeof(pteg));
|
||||
|
||||
return 0;
|
||||
} else {
|
||||
dprintk("KVM MMU: No PTE found (ea=0x%lx sdr1=0x%llx "
|
||||
"ptegp=0x%lx)\n",
|
||||
eaddr, to_book3s(vcpu)->sdr1, ptegp);
|
||||
for (i = 0; i < 16; i += 2)
|
||||
dprintk(" %02d: 0x%llx - 0x%llx (0x%llx)\n",
|
||||
i, pteg[i], pteg[i+1], avpn);
|
||||
|
||||
if (!second) {
|
||||
second = HPTE_V_SECONDARY;
|
||||
goto do_second;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
no_page_found:
|
||||
|
||||
|
||||
if (perm_err)
|
||||
return -EPERM;
|
||||
|
||||
return -ENOENT;
|
||||
|
||||
no_seg_found:
|
||||
|
||||
dprintk("KVM MMU: Trigger segment fault\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static void kvmppc_mmu_book3s_64_slbmte(struct kvm_vcpu *vcpu, u64 rs, u64 rb)
|
||||
{
|
||||
struct kvmppc_vcpu_book3s *vcpu_book3s;
|
||||
u64 esid, esid_1t;
|
||||
int slb_nr;
|
||||
struct kvmppc_slb *slbe;
|
||||
|
||||
dprintk("KVM MMU: slbmte(0x%llx, 0x%llx)\n", rs, rb);
|
||||
|
||||
vcpu_book3s = to_book3s(vcpu);
|
||||
|
||||
esid = GET_ESID(rb);
|
||||
esid_1t = GET_ESID_1T(rb);
|
||||
slb_nr = rb & 0xfff;
|
||||
|
||||
if (slb_nr > vcpu_book3s->slb_nr)
|
||||
return;
|
||||
|
||||
slbe = &vcpu_book3s->slb[slb_nr];
|
||||
|
||||
slbe->large = (rs & SLB_VSID_L) ? 1 : 0;
|
||||
slbe->esid = slbe->large ? esid_1t : esid;
|
||||
slbe->vsid = rs >> 12;
|
||||
slbe->valid = (rb & SLB_ESID_V) ? 1 : 0;
|
||||
slbe->Ks = (rs & SLB_VSID_KS) ? 1 : 0;
|
||||
slbe->Kp = (rs & SLB_VSID_KP) ? 1 : 0;
|
||||
slbe->nx = (rs & SLB_VSID_N) ? 1 : 0;
|
||||
slbe->class = (rs & SLB_VSID_C) ? 1 : 0;
|
||||
|
||||
slbe->orige = rb & (ESID_MASK | SLB_ESID_V);
|
||||
slbe->origv = rs;
|
||||
|
||||
/* Map the new segment */
|
||||
kvmppc_mmu_map_segment(vcpu, esid << SID_SHIFT);
|
||||
}
|
||||
|
||||
static u64 kvmppc_mmu_book3s_64_slbmfee(struct kvm_vcpu *vcpu, u64 slb_nr)
|
||||
{
|
||||
struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
|
||||
struct kvmppc_slb *slbe;
|
||||
|
||||
if (slb_nr > vcpu_book3s->slb_nr)
|
||||
return 0;
|
||||
|
||||
slbe = &vcpu_book3s->slb[slb_nr];
|
||||
|
||||
return slbe->orige;
|
||||
}
|
||||
|
||||
static u64 kvmppc_mmu_book3s_64_slbmfev(struct kvm_vcpu *vcpu, u64 slb_nr)
|
||||
{
|
||||
struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
|
||||
struct kvmppc_slb *slbe;
|
||||
|
||||
if (slb_nr > vcpu_book3s->slb_nr)
|
||||
return 0;
|
||||
|
||||
slbe = &vcpu_book3s->slb[slb_nr];
|
||||
|
||||
return slbe->origv;
|
||||
}
|
||||
|
||||
static void kvmppc_mmu_book3s_64_slbie(struct kvm_vcpu *vcpu, u64 ea)
|
||||
{
|
||||
struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
|
||||
struct kvmppc_slb *slbe;
|
||||
|
||||
dprintk("KVM MMU: slbie(0x%llx)\n", ea);
|
||||
|
||||
slbe = kvmppc_mmu_book3s_64_find_slbe(vcpu_book3s, ea);
|
||||
|
||||
if (!slbe)
|
||||
return;
|
||||
|
||||
dprintk("KVM MMU: slbie(0x%llx, 0x%llx)\n", ea, slbe->esid);
|
||||
|
||||
slbe->valid = false;
|
||||
|
||||
kvmppc_mmu_map_segment(vcpu, ea);
|
||||
}
|
||||
|
||||
static void kvmppc_mmu_book3s_64_slbia(struct kvm_vcpu *vcpu)
|
||||
{
|
||||
struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
|
||||
int i;
|
||||
|
||||
dprintk("KVM MMU: slbia()\n");
|
||||
|
||||
for (i = 1; i < vcpu_book3s->slb_nr; i++)
|
||||
vcpu_book3s->slb[i].valid = false;
|
||||
|
||||
if (vcpu->arch.msr & MSR_IR) {
|
||||
kvmppc_mmu_flush_segments(vcpu);
|
||||
kvmppc_mmu_map_segment(vcpu, vcpu->arch.pc);
|
||||
}
|
||||
}
|
||||
|
||||
static void kvmppc_mmu_book3s_64_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
|
||||
ulong value)
|
||||
{
|
||||
u64 rb = 0, rs = 0;
|
||||
|
||||
/* ESID = srnum */
|
||||
rb |= (srnum & 0xf) << 28;
|
||||
/* Set the valid bit */
|
||||
rb |= 1 << 27;
|
||||
/* Index = ESID */
|
||||
rb |= srnum;
|
||||
|
||||
/* VSID = VSID */
|
||||
rs |= (value & 0xfffffff) << 12;
|
||||
/* flags = flags */
|
||||
rs |= ((value >> 27) & 0xf) << 9;
|
||||
|
||||
kvmppc_mmu_book3s_64_slbmte(vcpu, rs, rb);
|
||||
}
|
||||
|
||||
static void kvmppc_mmu_book3s_64_tlbie(struct kvm_vcpu *vcpu, ulong va,
|
||||
bool large)
|
||||
{
|
||||
u64 mask = 0xFFFFFFFFFULL;
|
||||
|
||||
dprintk("KVM MMU: tlbie(0x%lx)\n", va);
|
||||
|
||||
if (large)
|
||||
mask = 0xFFFFFF000ULL;
|
||||
kvmppc_mmu_pte_vflush(vcpu, va >> 12, mask);
|
||||
}
|
||||
|
||||
static int kvmppc_mmu_book3s_64_esid_to_vsid(struct kvm_vcpu *vcpu, u64 esid,
|
||||
u64 *vsid)
|
||||
{
|
||||
switch (vcpu->arch.msr & (MSR_DR|MSR_IR)) {
|
||||
case 0:
|
||||
*vsid = (VSID_REAL >> 16) | esid;
|
||||
break;
|
||||
case MSR_IR:
|
||||
*vsid = (VSID_REAL_IR >> 16) | esid;
|
||||
break;
|
||||
case MSR_DR:
|
||||
*vsid = (VSID_REAL_DR >> 16) | esid;
|
||||
break;
|
||||
case MSR_DR|MSR_IR:
|
||||
{
|
||||
ulong ea;
|
||||
struct kvmppc_slb *slb;
|
||||
ea = esid << SID_SHIFT;
|
||||
slb = kvmppc_mmu_book3s_64_find_slbe(to_book3s(vcpu), ea);
|
||||
if (slb)
|
||||
*vsid = slb->vsid;
|
||||
else
|
||||
return -ENOENT;
|
||||
|
||||
break;
|
||||
}
|
||||
default:
|
||||
BUG();
|
||||
break;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static bool kvmppc_mmu_book3s_64_is_dcbz32(struct kvm_vcpu *vcpu)
|
||||
{
|
||||
return (to_book3s(vcpu)->hid[5] & 0x80);
|
||||
}
|
||||
|
||||
void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu)
|
||||
{
|
||||
struct kvmppc_mmu *mmu = &vcpu->arch.mmu;
|
||||
|
||||
mmu->mfsrin = NULL;
|
||||
mmu->mtsrin = kvmppc_mmu_book3s_64_mtsrin;
|
||||
mmu->slbmte = kvmppc_mmu_book3s_64_slbmte;
|
||||
mmu->slbmfee = kvmppc_mmu_book3s_64_slbmfee;
|
||||
mmu->slbmfev = kvmppc_mmu_book3s_64_slbmfev;
|
||||
mmu->slbie = kvmppc_mmu_book3s_64_slbie;
|
||||
mmu->slbia = kvmppc_mmu_book3s_64_slbia;
|
||||
mmu->xlate = kvmppc_mmu_book3s_64_xlate;
|
||||
mmu->reset_msr = kvmppc_mmu_book3s_64_reset_msr;
|
||||
mmu->tlbie = kvmppc_mmu_book3s_64_tlbie;
|
||||
mmu->esid_to_vsid = kvmppc_mmu_book3s_64_esid_to_vsid;
|
||||
mmu->ea_to_vp = kvmppc_mmu_book3s_64_ea_to_vp;
|
||||
mmu->is_dcbz32 = kvmppc_mmu_book3s_64_is_dcbz32;
|
||||
}
|
||||
Loading…
Reference in a new issue