252 lines
7.0 KiB
C
252 lines
7.0 KiB
C
/*
|
|
* Copyright (C) 2011. Freescale Inc. All rights reserved.
|
|
*
|
|
* Authors:
|
|
* Alexander Graf <agraf@suse.de>
|
|
* Paul Mackerras <paulus@samba.org>
|
|
*
|
|
* Description:
|
|
*
|
|
* Hypercall handling for running PAPR guests in PR KVM on Book 3S
|
|
* processors.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/anon_inodes.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
#include <asm/kvm_ppc.h>
|
|
#include <asm/kvm_book3s.h>
|
|
|
|
static unsigned long get_pteg_addr(struct kvm_vcpu *vcpu, long pte_index)
|
|
{
|
|
struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
|
|
unsigned long pteg_addr;
|
|
|
|
pte_index <<= 4;
|
|
pte_index &= ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1) << 7 | 0x70;
|
|
pteg_addr = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL;
|
|
pteg_addr |= pte_index;
|
|
|
|
return pteg_addr;
|
|
}
|
|
|
|
static int kvmppc_h_pr_enter(struct kvm_vcpu *vcpu)
|
|
{
|
|
long flags = kvmppc_get_gpr(vcpu, 4);
|
|
long pte_index = kvmppc_get_gpr(vcpu, 5);
|
|
unsigned long pteg[2 * 8];
|
|
unsigned long pteg_addr, i, *hpte;
|
|
|
|
pte_index &= ~7UL;
|
|
pteg_addr = get_pteg_addr(vcpu, pte_index);
|
|
|
|
copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg));
|
|
hpte = pteg;
|
|
|
|
if (likely((flags & H_EXACT) == 0)) {
|
|
pte_index &= ~7UL;
|
|
for (i = 0; ; ++i) {
|
|
if (i == 8)
|
|
return H_PTEG_FULL;
|
|
if ((*hpte & HPTE_V_VALID) == 0)
|
|
break;
|
|
hpte += 2;
|
|
}
|
|
} else {
|
|
i = kvmppc_get_gpr(vcpu, 5) & 7UL;
|
|
hpte += i * 2;
|
|
}
|
|
|
|
hpte[0] = kvmppc_get_gpr(vcpu, 6);
|
|
hpte[1] = kvmppc_get_gpr(vcpu, 7);
|
|
copy_to_user((void __user *)pteg_addr, pteg, sizeof(pteg));
|
|
kvmppc_set_gpr(vcpu, 3, H_SUCCESS);
|
|
kvmppc_set_gpr(vcpu, 4, pte_index | i);
|
|
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
static int kvmppc_h_pr_remove(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned long flags= kvmppc_get_gpr(vcpu, 4);
|
|
unsigned long pte_index = kvmppc_get_gpr(vcpu, 5);
|
|
unsigned long avpn = kvmppc_get_gpr(vcpu, 6);
|
|
unsigned long v = 0, pteg, rb;
|
|
unsigned long pte[2];
|
|
|
|
pteg = get_pteg_addr(vcpu, pte_index);
|
|
copy_from_user(pte, (void __user *)pteg, sizeof(pte));
|
|
|
|
if ((pte[0] & HPTE_V_VALID) == 0 ||
|
|
((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn) ||
|
|
((flags & H_ANDCOND) && (pte[0] & avpn) != 0)) {
|
|
kvmppc_set_gpr(vcpu, 3, H_NOT_FOUND);
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
copy_to_user((void __user *)pteg, &v, sizeof(v));
|
|
|
|
rb = compute_tlbie_rb(pte[0], pte[1], pte_index);
|
|
vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
|
|
|
|
kvmppc_set_gpr(vcpu, 3, H_SUCCESS);
|
|
kvmppc_set_gpr(vcpu, 4, pte[0]);
|
|
kvmppc_set_gpr(vcpu, 5, pte[1]);
|
|
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
/* Request defs for kvmppc_h_pr_bulk_remove() */
|
|
#define H_BULK_REMOVE_TYPE 0xc000000000000000ULL
|
|
#define H_BULK_REMOVE_REQUEST 0x4000000000000000ULL
|
|
#define H_BULK_REMOVE_RESPONSE 0x8000000000000000ULL
|
|
#define H_BULK_REMOVE_END 0xc000000000000000ULL
|
|
#define H_BULK_REMOVE_CODE 0x3000000000000000ULL
|
|
#define H_BULK_REMOVE_SUCCESS 0x0000000000000000ULL
|
|
#define H_BULK_REMOVE_NOT_FOUND 0x1000000000000000ULL
|
|
#define H_BULK_REMOVE_PARM 0x2000000000000000ULL
|
|
#define H_BULK_REMOVE_HW 0x3000000000000000ULL
|
|
#define H_BULK_REMOVE_RC 0x0c00000000000000ULL
|
|
#define H_BULK_REMOVE_FLAGS 0x0300000000000000ULL
|
|
#define H_BULK_REMOVE_ABSOLUTE 0x0000000000000000ULL
|
|
#define H_BULK_REMOVE_ANDCOND 0x0100000000000000ULL
|
|
#define H_BULK_REMOVE_AVPN 0x0200000000000000ULL
|
|
#define H_BULK_REMOVE_PTEX 0x00ffffffffffffffULL
|
|
#define H_BULK_REMOVE_MAX_BATCH 4
|
|
|
|
static int kvmppc_h_pr_bulk_remove(struct kvm_vcpu *vcpu)
|
|
{
|
|
int i;
|
|
int paramnr = 4;
|
|
int ret = H_SUCCESS;
|
|
|
|
for (i = 0; i < H_BULK_REMOVE_MAX_BATCH; i++) {
|
|
unsigned long tsh = kvmppc_get_gpr(vcpu, paramnr+(2*i));
|
|
unsigned long tsl = kvmppc_get_gpr(vcpu, paramnr+(2*i)+1);
|
|
unsigned long pteg, rb, flags;
|
|
unsigned long pte[2];
|
|
unsigned long v = 0;
|
|
|
|
if ((tsh & H_BULK_REMOVE_TYPE) == H_BULK_REMOVE_END) {
|
|
break; /* Exit success */
|
|
} else if ((tsh & H_BULK_REMOVE_TYPE) !=
|
|
H_BULK_REMOVE_REQUEST) {
|
|
ret = H_PARAMETER;
|
|
break; /* Exit fail */
|
|
}
|
|
|
|
tsh &= H_BULK_REMOVE_PTEX | H_BULK_REMOVE_FLAGS;
|
|
tsh |= H_BULK_REMOVE_RESPONSE;
|
|
|
|
if ((tsh & H_BULK_REMOVE_ANDCOND) &&
|
|
(tsh & H_BULK_REMOVE_AVPN)) {
|
|
tsh |= H_BULK_REMOVE_PARM;
|
|
kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh);
|
|
ret = H_PARAMETER;
|
|
break; /* Exit fail */
|
|
}
|
|
|
|
pteg = get_pteg_addr(vcpu, tsh & H_BULK_REMOVE_PTEX);
|
|
copy_from_user(pte, (void __user *)pteg, sizeof(pte));
|
|
|
|
/* tsl = AVPN */
|
|
flags = (tsh & H_BULK_REMOVE_FLAGS) >> 26;
|
|
|
|
if ((pte[0] & HPTE_V_VALID) == 0 ||
|
|
((flags & H_AVPN) && (pte[0] & ~0x7fUL) != tsl) ||
|
|
((flags & H_ANDCOND) && (pte[0] & tsl) != 0)) {
|
|
tsh |= H_BULK_REMOVE_NOT_FOUND;
|
|
} else {
|
|
/* Splat the pteg in (userland) hpt */
|
|
copy_to_user((void __user *)pteg, &v, sizeof(v));
|
|
|
|
rb = compute_tlbie_rb(pte[0], pte[1],
|
|
tsh & H_BULK_REMOVE_PTEX);
|
|
vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
|
|
tsh |= H_BULK_REMOVE_SUCCESS;
|
|
tsh |= (pte[1] & (HPTE_R_C | HPTE_R_R)) << 43;
|
|
}
|
|
kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh);
|
|
}
|
|
kvmppc_set_gpr(vcpu, 3, ret);
|
|
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned long flags = kvmppc_get_gpr(vcpu, 4);
|
|
unsigned long pte_index = kvmppc_get_gpr(vcpu, 5);
|
|
unsigned long avpn = kvmppc_get_gpr(vcpu, 6);
|
|
unsigned long rb, pteg, r, v;
|
|
unsigned long pte[2];
|
|
|
|
pteg = get_pteg_addr(vcpu, pte_index);
|
|
copy_from_user(pte, (void __user *)pteg, sizeof(pte));
|
|
|
|
if ((pte[0] & HPTE_V_VALID) == 0 ||
|
|
((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn)) {
|
|
kvmppc_set_gpr(vcpu, 3, H_NOT_FOUND);
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
v = pte[0];
|
|
r = pte[1];
|
|
r &= ~(HPTE_R_PP0 | HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_HI |
|
|
HPTE_R_KEY_LO);
|
|
r |= (flags << 55) & HPTE_R_PP0;
|
|
r |= (flags << 48) & HPTE_R_KEY_HI;
|
|
r |= flags & (HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_LO);
|
|
|
|
pte[1] = r;
|
|
|
|
rb = compute_tlbie_rb(v, r, pte_index);
|
|
vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
|
|
copy_to_user((void __user *)pteg, pte, sizeof(pte));
|
|
|
|
kvmppc_set_gpr(vcpu, 3, H_SUCCESS);
|
|
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned long liobn = kvmppc_get_gpr(vcpu, 4);
|
|
unsigned long ioba = kvmppc_get_gpr(vcpu, 5);
|
|
unsigned long tce = kvmppc_get_gpr(vcpu, 6);
|
|
long rc;
|
|
|
|
rc = kvmppc_h_put_tce(vcpu, liobn, ioba, tce);
|
|
if (rc == H_TOO_HARD)
|
|
return EMULATE_FAIL;
|
|
kvmppc_set_gpr(vcpu, 3, rc);
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd)
|
|
{
|
|
switch (cmd) {
|
|
case H_ENTER:
|
|
return kvmppc_h_pr_enter(vcpu);
|
|
case H_REMOVE:
|
|
return kvmppc_h_pr_remove(vcpu);
|
|
case H_PROTECT:
|
|
return kvmppc_h_pr_protect(vcpu);
|
|
case H_BULK_REMOVE:
|
|
return kvmppc_h_pr_bulk_remove(vcpu);
|
|
case H_PUT_TCE:
|
|
return kvmppc_h_pr_put_tce(vcpu);
|
|
case H_CEDE:
|
|
kvm_vcpu_block(vcpu);
|
|
clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
|
|
vcpu->stat.halt_wakeup++;
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
return EMULATE_FAIL;
|
|
}
|