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49dd2c4928
linux/arch/powerpc/kvm/emulate.c
Hollis Blanchard 49dd2c4928 KVM: powerpc: Map guest userspace with TID=0 mappings 
When we use TID=N userspace mappings, we must ensure that kernel mappings have
been destroyed when entering userspace. Using TID=1/TID=0 for kernel/user
mappings and running userspace with PID=0 means that userspace can't access the
kernel mappings, but the kernel can directly access userspace.

The net is that we don't need to flush the TLB on privilege switches, but we do
on guest context switches (which are far more infrequent). Guest boot time
performance improvement: about 30%.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15 10:15:16 +02:00

779 lines
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/*
* 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 IBM Corp. 2007
*
* Authors: Hollis Blanchard <hollisb@us.ibm.com>
*/
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kvm_host.h>
#include <asm/dcr.h>
#include <asm/dcr-regs.h>
#include <asm/time.h>
#include <asm/byteorder.h>
#include <asm/kvm_ppc.h>
#include "44x_tlb.h"
/* Instruction decoding */
static inline unsigned int get_op(u32 inst)
{
return inst >> 26;
}
static inline unsigned int get_xop(u32 inst)
{
return (inst >> 1) & 0x3ff;
}
static inline unsigned int get_sprn(u32 inst)
{
return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
}
static inline unsigned int get_dcrn(u32 inst)
{
return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
}
static inline unsigned int get_rt(u32 inst)
{
return (inst >> 21) & 0x1f;
}
static inline unsigned int get_rs(u32 inst)
{
return (inst >> 21) & 0x1f;
}
static inline unsigned int get_ra(u32 inst)
{
return (inst >> 16) & 0x1f;
}
static inline unsigned int get_rb(u32 inst)
{
return (inst >> 11) & 0x1f;
}
static inline unsigned int get_rc(u32 inst)
{
return inst & 0x1;
}
static inline unsigned int get_ws(u32 inst)
{
return (inst >> 11) & 0x1f;
}
static inline unsigned int get_d(u32 inst)
{
return inst & 0xffff;
}
static int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
const struct tlbe *tlbe)
{
gpa_t gpa;
if (!get_tlb_v(tlbe))
return 0;
/* Does it match current guest AS? */
/* XXX what about IS != DS? */
if (get_tlb_ts(tlbe) != !!(vcpu->arch.msr & MSR_IS))
return 0;
gpa = get_tlb_raddr(tlbe);
if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
/* Mapping is not for RAM. */
return 0;
return 1;
}
static int kvmppc_emul_tlbwe(struct kvm_vcpu *vcpu, u32 inst)
{
u64 eaddr;
u64 raddr;
u64 asid;
u32 flags;
struct tlbe *tlbe;
unsigned int ra;
unsigned int rs;
unsigned int ws;
unsigned int index;
ra = get_ra(inst);
rs = get_rs(inst);
ws = get_ws(inst);
index = vcpu->arch.gpr[ra];
if (index > PPC44x_TLB_SIZE) {
printk("%s: index %d\n", __func__, index);
kvmppc_dump_vcpu(vcpu);
return EMULATE_FAIL;
}
tlbe = &vcpu->arch.guest_tlb[index];
/* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
if (tlbe->word0 & PPC44x_TLB_VALID) {
eaddr = get_tlb_eaddr(tlbe);
asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
kvmppc_mmu_invalidate(vcpu, eaddr, get_tlb_end(tlbe), asid);
}
switch (ws) {
case PPC44x_TLB_PAGEID:
tlbe->tid = vcpu->arch.mmucr & 0xff;
tlbe->word0 = vcpu->arch.gpr[rs];
break;
case PPC44x_TLB_XLAT:
tlbe->word1 = vcpu->arch.gpr[rs];
break;
case PPC44x_TLB_ATTRIB:
tlbe->word2 = vcpu->arch.gpr[rs];
break;
default:
return EMULATE_FAIL;
}
if (tlbe_is_host_safe(vcpu, tlbe)) {
eaddr = get_tlb_eaddr(tlbe);
raddr = get_tlb_raddr(tlbe);
asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
flags = tlbe->word2 & 0xffff;
/* Create a 4KB mapping on the host. If the guest wanted a
* large page, only the first 4KB is mapped here and the rest
* are mapped on the fly. */
kvmppc_mmu_map(vcpu, eaddr, raddr >> PAGE_SHIFT, asid, flags);
}
KVMTRACE_5D(GTLB_WRITE, vcpu, index,
tlbe->tid, tlbe->word0, tlbe->word1, tlbe->word2,
handler);
return EMULATE_DONE;
}
static void kvmppc_emulate_dec(struct kvm_vcpu *vcpu)
{
if (vcpu->arch.tcr & TCR_DIE) {
/* The decrementer ticks at the same rate as the timebase, so
* that's how we convert the guest DEC value to the number of
* host ticks. */
unsigned long nr_jiffies;
nr_jiffies = vcpu->arch.dec / tb_ticks_per_jiffy;
mod_timer(&vcpu->arch.dec_timer,
get_jiffies_64() + nr_jiffies);
} else {
del_timer(&vcpu->arch.dec_timer);
}
}
static void kvmppc_emul_rfi(struct kvm_vcpu *vcpu)
{
vcpu->arch.pc = vcpu->arch.srr0;
kvmppc_set_msr(vcpu, vcpu->arch.srr1);
}
/* XXX to do:
* lhax
* lhaux
* lswx
* lswi
* stswx
* stswi
* lha
* lhau
* lmw
* stmw
*
* XXX is_bigendian should depend on MMU mapping or MSR[LE]
*/
int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
{
u32 inst = vcpu->arch.last_inst;
u32 ea;
int ra;
int rb;
int rc;
int rs;
int rt;
int sprn;
int dcrn;
enum emulation_result emulated = EMULATE_DONE;
int advance = 1;
switch (get_op(inst)) {
case 3: /* trap */
printk("trap!\n");
kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_PROGRAM);
advance = 0;
break;
case 19:
switch (get_xop(inst)) {
case 50: /* rfi */
kvmppc_emul_rfi(vcpu);
advance = 0;
break;
default:
emulated = EMULATE_FAIL;
break;
}
break;
case 31:
switch (get_xop(inst)) {
case 23: /* lwzx */
rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
break;
case 83: /* mfmsr */
rt = get_rt(inst);
vcpu->arch.gpr[rt] = vcpu->arch.msr;
break;
case 87: /* lbzx */
rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
break;
case 131: /* wrtee */
rs = get_rs(inst);
vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
| (vcpu->arch.gpr[rs] & MSR_EE);
break;
case 146: /* mtmsr */
rs = get_rs(inst);
kvmppc_set_msr(vcpu, vcpu->arch.gpr[rs]);
break;
case 151: /* stwx */
rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu,
vcpu->arch.gpr[rs],
4, 1);
break;
case 163: /* wrteei */
vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
| (inst & MSR_EE);
break;
case 215: /* stbx */
rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu,
vcpu->arch.gpr[rs],
1, 1);
break;
case 247: /* stbux */
rs = get_rs(inst);
ra = get_ra(inst);
rb = get_rb(inst);
ea = vcpu->arch.gpr[rb];
if (ra)
ea += vcpu->arch.gpr[ra];
emulated = kvmppc_handle_store(run, vcpu,
vcpu->arch.gpr[rs],
1, 1);
vcpu->arch.gpr[rs] = ea;
break;
case 279: /* lhzx */
rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
break;
case 311: /* lhzux */
rt = get_rt(inst);
ra = get_ra(inst);
rb = get_rb(inst);
ea = vcpu->arch.gpr[rb];
if (ra)
ea += vcpu->arch.gpr[ra];
emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
vcpu->arch.gpr[ra] = ea;
break;
case 323: /* mfdcr */
dcrn = get_dcrn(inst);
rt = get_rt(inst);
/* The guest may access CPR0 registers to determine the timebase
* frequency, and it must know the real host frequency because it
* can directly access the timebase registers.
*
* It would be possible to emulate those accesses in userspace,
* but userspace can really only figure out the end frequency.
* We could decompose that into the factors that compute it, but
* that's tricky math, and it's easier to just report the real
* CPR0 values.
*/
switch (dcrn) {
case DCRN_CPR0_CONFIG_ADDR:
vcpu->arch.gpr[rt] = vcpu->arch.cpr0_cfgaddr;
break;
case DCRN_CPR0_CONFIG_DATA:
local_irq_disable();
mtdcr(DCRN_CPR0_CONFIG_ADDR,
vcpu->arch.cpr0_cfgaddr);
vcpu->arch.gpr[rt] = mfdcr(DCRN_CPR0_CONFIG_DATA);
local_irq_enable();
break;
default:
run->dcr.dcrn = dcrn;
run->dcr.data = 0;
run->dcr.is_write = 0;
vcpu->arch.io_gpr = rt;
vcpu->arch.dcr_needed = 1;
emulated = EMULATE_DO_DCR;
}
break;
case 339: /* mfspr */
sprn = get_sprn(inst);
rt = get_rt(inst);
switch (sprn) {
case SPRN_SRR0:
vcpu->arch.gpr[rt] = vcpu->arch.srr0; break;
case SPRN_SRR1:
vcpu->arch.gpr[rt] = vcpu->arch.srr1; break;
case SPRN_MMUCR:
vcpu->arch.gpr[rt] = vcpu->arch.mmucr; break;
case SPRN_PID:
vcpu->arch.gpr[rt] = vcpu->arch.pid; break;
case SPRN_IVPR:
vcpu->arch.gpr[rt] = vcpu->arch.ivpr; break;
case SPRN_CCR0:
vcpu->arch.gpr[rt] = vcpu->arch.ccr0; break;
case SPRN_CCR1:
vcpu->arch.gpr[rt] = vcpu->arch.ccr1; break;
case SPRN_PVR:
vcpu->arch.gpr[rt] = vcpu->arch.pvr; break;
case SPRN_DEAR:
vcpu->arch.gpr[rt] = vcpu->arch.dear; break;
case SPRN_ESR:
vcpu->arch.gpr[rt] = vcpu->arch.esr; break;
case SPRN_DBCR0:
vcpu->arch.gpr[rt] = vcpu->arch.dbcr0; break;
case SPRN_DBCR1:
vcpu->arch.gpr[rt] = vcpu->arch.dbcr1; break;
/* Note: mftb and TBRL/TBWL are user-accessible, so
* the guest can always access the real TB anyways.
* In fact, we probably will never see these traps. */
case SPRN_TBWL:
vcpu->arch.gpr[rt] = mftbl(); break;
case SPRN_TBWU:
vcpu->arch.gpr[rt] = mftbu(); break;
case SPRN_SPRG0:
vcpu->arch.gpr[rt] = vcpu->arch.sprg0; break;
case SPRN_SPRG1:
vcpu->arch.gpr[rt] = vcpu->arch.sprg1; break;
case SPRN_SPRG2:
vcpu->arch.gpr[rt] = vcpu->arch.sprg2; break;
case SPRN_SPRG3:
vcpu->arch.gpr[rt] = vcpu->arch.sprg3; break;
/* Note: SPRG4-7 are user-readable, so we don't get
* a trap. */
case SPRN_IVOR0:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[0]; break;
case SPRN_IVOR1:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[1]; break;
case SPRN_IVOR2:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[2]; break;
case SPRN_IVOR3:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[3]; break;
case SPRN_IVOR4:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[4]; break;
case SPRN_IVOR5:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[5]; break;
case SPRN_IVOR6:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[6]; break;
case SPRN_IVOR7:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[7]; break;
case SPRN_IVOR8:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[8]; break;
case SPRN_IVOR9:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[9]; break;
case SPRN_IVOR10:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[10]; break;
case SPRN_IVOR11:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[11]; break;
case SPRN_IVOR12:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[12]; break;
case SPRN_IVOR13:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[13]; break;
case SPRN_IVOR14:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[14]; break;
case SPRN_IVOR15:
vcpu->arch.gpr[rt] = vcpu->arch.ivor[15]; break;
default:
printk("mfspr: unknown spr %x\n", sprn);
vcpu->arch.gpr[rt] = 0;
break;
}
break;
case 407: /* sthx */
rs = get_rs(inst);
ra = get_ra(inst);
rb = get_rb(inst);
emulated = kvmppc_handle_store(run, vcpu,
vcpu->arch.gpr[rs],
2, 1);
break;
case 439: /* sthux */
rs = get_rs(inst);
ra = get_ra(inst);
rb = get_rb(inst);
ea = vcpu->arch.gpr[rb];
if (ra)
ea += vcpu->arch.gpr[ra];
emulated = kvmppc_handle_store(run, vcpu,
vcpu->arch.gpr[rs],
2, 1);
vcpu->arch.gpr[ra] = ea;
break;
case 451: /* mtdcr */
dcrn = get_dcrn(inst);
rs = get_rs(inst);
/* emulate some access in kernel */
switch (dcrn) {
case DCRN_CPR0_CONFIG_ADDR:
vcpu->arch.cpr0_cfgaddr = vcpu->arch.gpr[rs];
break;
default:
run->dcr.dcrn = dcrn;
run->dcr.data = vcpu->arch.gpr[rs];
run->dcr.is_write = 1;
vcpu->arch.dcr_needed = 1;
emulated = EMULATE_DO_DCR;
}
break;
case 467: /* mtspr */
sprn = get_sprn(inst);
rs = get_rs(inst);
switch (sprn) {
case SPRN_SRR0:
vcpu->arch.srr0 = vcpu->arch.gpr[rs]; break;
case SPRN_SRR1:
vcpu->arch.srr1 = vcpu->arch.gpr[rs]; break;
case SPRN_MMUCR:
vcpu->arch.mmucr = vcpu->arch.gpr[rs]; break;
case SPRN_PID:
kvmppc_set_pid(vcpu, vcpu->arch.gpr[rs]); break;
case SPRN_CCR0:
vcpu->arch.ccr0 = vcpu->arch.gpr[rs]; break;
case SPRN_CCR1:
vcpu->arch.ccr1 = vcpu->arch.gpr[rs]; break;
case SPRN_DEAR:
vcpu->arch.dear = vcpu->arch.gpr[rs]; break;
case SPRN_ESR:
vcpu->arch.esr = vcpu->arch.gpr[rs]; break;
case SPRN_DBCR0:
vcpu->arch.dbcr0 = vcpu->arch.gpr[rs]; break;
case SPRN_DBCR1:
vcpu->arch.dbcr1 = vcpu->arch.gpr[rs]; break;
/* XXX We need to context-switch the timebase for
* watchdog and FIT. */
case SPRN_TBWL: break;
case SPRN_TBWU: break;
case SPRN_DEC:
vcpu->arch.dec = vcpu->arch.gpr[rs];
kvmppc_emulate_dec(vcpu);
break;
case SPRN_TSR:
vcpu->arch.tsr &= ~vcpu->arch.gpr[rs]; break;
case SPRN_TCR:
vcpu->arch.tcr = vcpu->arch.gpr[rs];
kvmppc_emulate_dec(vcpu);
break;
case SPRN_SPRG0:
vcpu->arch.sprg0 = vcpu->arch.gpr[rs]; break;
case SPRN_SPRG1:
vcpu->arch.sprg1 = vcpu->arch.gpr[rs]; break;
case SPRN_SPRG2:
vcpu->arch.sprg2 = vcpu->arch.gpr[rs]; break;
case SPRN_SPRG3:
vcpu->arch.sprg3 = vcpu->arch.gpr[rs]; break;
/* Note: SPRG4-7 are user-readable. These values are
* loaded into the real SPRGs when resuming the
* guest. */
case SPRN_SPRG4:
vcpu->arch.sprg4 = vcpu->arch.gpr[rs]; break;
case SPRN_SPRG5:
vcpu->arch.sprg5 = vcpu->arch.gpr[rs]; break;
case SPRN_SPRG6:
vcpu->arch.sprg6 = vcpu->arch.gpr[rs]; break;
case SPRN_SPRG7:
vcpu->arch.sprg7 = vcpu->arch.gpr[rs]; break;
case SPRN_IVPR:
vcpu->arch.ivpr = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR0:
vcpu->arch.ivor[0] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR1:
vcpu->arch.ivor[1] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR2:
vcpu->arch.ivor[2] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR3:
vcpu->arch.ivor[3] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR4:
vcpu->arch.ivor[4] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR5:
vcpu->arch.ivor[5] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR6:
vcpu->arch.ivor[6] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR7:
vcpu->arch.ivor[7] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR8:
vcpu->arch.ivor[8] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR9:
vcpu->arch.ivor[9] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR10:
vcpu->arch.ivor[10] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR11:
vcpu->arch.ivor[11] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR12:
vcpu->arch.ivor[12] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR13:
vcpu->arch.ivor[13] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR14:
vcpu->arch.ivor[14] = vcpu->arch.gpr[rs]; break;
case SPRN_IVOR15:
vcpu->arch.ivor[15] = vcpu->arch.gpr[rs]; break;
default:
printk("mtspr: unknown spr %x\n", sprn);
emulated = EMULATE_FAIL;
break;
}
break;
case 470: /* dcbi */
/* Do nothing. The guest is performing dcbi because
* hardware DMA is not snooped by the dcache, but
* emulated DMA either goes through the dcache as
* normal writes, or the host kernel has handled dcache
* coherence. */
break;
case 534: /* lwbrx */
rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 4, 0);
break;
case 566: /* tlbsync */
break;
case 662: /* stwbrx */
rs = get_rs(inst);
ra = get_ra(inst);
rb = get_rb(inst);
emulated = kvmppc_handle_store(run, vcpu,
vcpu->arch.gpr[rs],
4, 0);
break;
case 978: /* tlbwe */
emulated = kvmppc_emul_tlbwe(vcpu, inst);
break;
case 914: { /* tlbsx */
int index;
unsigned int as = get_mmucr_sts(vcpu);
unsigned int pid = get_mmucr_stid(vcpu);
rt = get_rt(inst);
ra = get_ra(inst);
rb = get_rb(inst);
rc = get_rc(inst);
ea = vcpu->arch.gpr[rb];
if (ra)
ea += vcpu->arch.gpr[ra];
index = kvmppc_44x_tlb_index(vcpu, ea, pid, as);
if (rc) {
if (index < 0)
vcpu->arch.cr &= ~0x20000000;
else
vcpu->arch.cr |= 0x20000000;
}
vcpu->arch.gpr[rt] = index;
}
break;
case 790: /* lhbrx */
rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 2, 0);
break;
case 918: /* sthbrx */
rs = get_rs(inst);
ra = get_ra(inst);
rb = get_rb(inst);
emulated = kvmppc_handle_store(run, vcpu,
vcpu->arch.gpr[rs],
2, 0);
break;
case 966: /* iccci */
break;
default:
printk("unknown: op %d xop %d\n", get_op(inst),
get_xop(inst));
emulated = EMULATE_FAIL;
break;
}
break;
case 32: /* lwz */
rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
break;
case 33: /* lwzu */
ra = get_ra(inst);
rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
break;
case 34: /* lbz */
rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
break;
case 35: /* lbzu */
ra = get_ra(inst);
rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
break;
case 36: /* stw */
rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
4, 1);
break;
case 37: /* stwu */
ra = get_ra(inst);
rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
4, 1);
vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
break;
case 38: /* stb */
rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
1, 1);
break;
case 39: /* stbu */
ra = get_ra(inst);
rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
1, 1);
vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
break;
case 40: /* lhz */
rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
break;
case 41: /* lhzu */
ra = get_ra(inst);
rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
break;
case 44: /* sth */
rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
2, 1);
break;
case 45: /* sthu */
ra = get_ra(inst);
rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu, vcpu->arch.gpr[rs],
2, 1);
vcpu->arch.gpr[ra] = vcpu->arch.paddr_accessed;
break;
default:
printk("unknown op %d\n", get_op(inst));
emulated = EMULATE_FAIL;
break;
}
KVMTRACE_3D(PPC_INSTR, vcpu, inst, vcpu->arch.pc, emulated, entryexit);
if (advance)
vcpu->arch.pc += 4; /* Advance past emulated instruction. */
return emulated;
}
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