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linux/arch/powerpc/kvm/e500_tlb.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

762 lines
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/*
* Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved.
*
* Author: Yu Liu, yu.liu@freescale.com
*
* Description:
* This file is based on arch/powerpc/kvm/44x_tlb.c,
* by Hollis Blanchard <hollisb@us.ibm.com>.
*
* 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/types.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/kvm.h>
#include <linux/kvm_host.h>
#include <linux/highmem.h>
#include <asm/kvm_ppc.h>
#include <asm/kvm_e500.h>
#include "../mm/mmu_decl.h"
#include "e500_tlb.h"
#include "trace.h"
#define to_htlb1_esel(esel) (tlb1_entry_num - (esel) - 1)
static unsigned int tlb1_entry_num;
void kvmppc_dump_tlbs(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
struct tlbe *tlbe;
int i, tlbsel;
printk("| %8s | %8s | %8s | %8s | %8s |\n",
"nr", "mas1", "mas2", "mas3", "mas7");
for (tlbsel = 0; tlbsel < 2; tlbsel++) {
printk("Guest TLB%d:\n", tlbsel);
for (i = 0; i < vcpu_e500->guest_tlb_size[tlbsel]; i++) {
tlbe = &vcpu_e500->guest_tlb[tlbsel][i];
if (tlbe->mas1 & MAS1_VALID)
printk(" G[%d][%3d] | %08X | %08X | %08X | %08X |\n",
tlbsel, i, tlbe->mas1, tlbe->mas2,
tlbe->mas3, tlbe->mas7);
}
}
for (tlbsel = 0; tlbsel < 2; tlbsel++) {
printk("Shadow TLB%d:\n", tlbsel);
for (i = 0; i < vcpu_e500->shadow_tlb_size[tlbsel]; i++) {
tlbe = &vcpu_e500->shadow_tlb[tlbsel][i];
if (tlbe->mas1 & MAS1_VALID)
printk(" S[%d][%3d] | %08X | %08X | %08X | %08X |\n",
tlbsel, i, tlbe->mas1, tlbe->mas2,
tlbe->mas3, tlbe->mas7);
}
}
}
static inline unsigned int tlb0_get_next_victim(
struct kvmppc_vcpu_e500 *vcpu_e500)
{
unsigned int victim;
victim = vcpu_e500->guest_tlb_nv[0]++;
if (unlikely(vcpu_e500->guest_tlb_nv[0] >= KVM_E500_TLB0_WAY_NUM))
vcpu_e500->guest_tlb_nv[0] = 0;
return victim;
}
static inline unsigned int tlb1_max_shadow_size(void)
{
return tlb1_entry_num - tlbcam_index;
}
static inline int tlbe_is_writable(struct tlbe *tlbe)
{
return tlbe->mas3 & (MAS3_SW|MAS3_UW);
}
static inline u32 e500_shadow_mas3_attrib(u32 mas3, int usermode)
{
/* Mask off reserved bits. */
mas3 &= MAS3_ATTRIB_MASK;
if (!usermode) {
/* Guest is in supervisor mode,
* so we need to translate guest
* supervisor permissions into user permissions. */
mas3 &= ~E500_TLB_USER_PERM_MASK;
mas3 |= (mas3 & E500_TLB_SUPER_PERM_MASK) << 1;
}
return mas3 | E500_TLB_SUPER_PERM_MASK;
}
static inline u32 e500_shadow_mas2_attrib(u32 mas2, int usermode)
{
#ifdef CONFIG_SMP
return (mas2 & MAS2_ATTRIB_MASK) | MAS2_M;
#else
return mas2 & MAS2_ATTRIB_MASK;
#endif
}
/*
* writing shadow tlb entry to host TLB
*/
static inline void __write_host_tlbe(struct tlbe *stlbe)
{
mtspr(SPRN_MAS1, stlbe->mas1);
mtspr(SPRN_MAS2, stlbe->mas2);
mtspr(SPRN_MAS3, stlbe->mas3);
mtspr(SPRN_MAS7, stlbe->mas7);
__asm__ __volatile__ ("tlbwe\n" : : );
}
static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel, int esel)
{
struct tlbe *stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel];
local_irq_disable();
if (tlbsel == 0) {
__write_host_tlbe(stlbe);
} else {
unsigned register mas0;
mas0 = mfspr(SPRN_MAS0);
mtspr(SPRN_MAS0, MAS0_TLBSEL(1) | MAS0_ESEL(to_htlb1_esel(esel)));
__write_host_tlbe(stlbe);
mtspr(SPRN_MAS0, mas0);
}
local_irq_enable();
}
void kvmppc_e500_tlb_load(struct kvm_vcpu *vcpu, int cpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int i;
unsigned register mas0;
/* Load all valid TLB1 entries to reduce guest tlb miss fault */
local_irq_disable();
mas0 = mfspr(SPRN_MAS0);
for (i = 0; i < tlb1_max_shadow_size(); i++) {
struct tlbe *stlbe = &vcpu_e500->shadow_tlb[1][i];
if (get_tlb_v(stlbe)) {
mtspr(SPRN_MAS0, MAS0_TLBSEL(1)
| MAS0_ESEL(to_htlb1_esel(i)));
__write_host_tlbe(stlbe);
}
}
mtspr(SPRN_MAS0, mas0);
local_irq_enable();
}
void kvmppc_e500_tlb_put(struct kvm_vcpu *vcpu)
{
_tlbil_all();
}
/* Search the guest TLB for a matching entry. */
static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500,
gva_t eaddr, int tlbsel, unsigned int pid, int as)
{
int i;
/* XXX Replace loop with fancy data structures. */
for (i = 0; i < vcpu_e500->guest_tlb_size[tlbsel]; i++) {
struct tlbe *tlbe = &vcpu_e500->guest_tlb[tlbsel][i];
unsigned int tid;
if (eaddr < get_tlb_eaddr(tlbe))
continue;
if (eaddr > get_tlb_end(tlbe))
continue;
tid = get_tlb_tid(tlbe);
if (tid && (tid != pid))
continue;
if (!get_tlb_v(tlbe))
continue;
if (get_tlb_ts(tlbe) != as && as != -1)
continue;
return i;
}
return -1;
}
static void kvmppc_e500_shadow_release(struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel, int esel)
{
struct tlbe *stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel];
struct page *page = vcpu_e500->shadow_pages[tlbsel][esel];
if (page) {
vcpu_e500->shadow_pages[tlbsel][esel] = NULL;
if (get_tlb_v(stlbe)) {
if (tlbe_is_writable(stlbe))
kvm_release_page_dirty(page);
else
kvm_release_page_clean(page);
}
}
}
static void kvmppc_e500_stlbe_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel, int esel)
{
struct tlbe *stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel];
kvmppc_e500_shadow_release(vcpu_e500, tlbsel, esel);
stlbe->mas1 = 0;
trace_kvm_stlb_inval(index_of(tlbsel, esel), stlbe->mas1, stlbe->mas2,
stlbe->mas3, stlbe->mas7);
}
static void kvmppc_e500_tlb1_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500,
gva_t eaddr, gva_t eend, u32 tid)
{
unsigned int pid = tid & 0xff;
unsigned int i;
/* XXX Replace loop with fancy data structures. */
for (i = 0; i < vcpu_e500->guest_tlb_size[1]; i++) {
struct tlbe *stlbe = &vcpu_e500->shadow_tlb[1][i];
unsigned int tid;
if (!get_tlb_v(stlbe))
continue;
if (eend < get_tlb_eaddr(stlbe))
continue;
if (eaddr > get_tlb_end(stlbe))
continue;
tid = get_tlb_tid(stlbe);
if (tid && (tid != pid))
continue;
kvmppc_e500_stlbe_invalidate(vcpu_e500, 1, i);
write_host_tlbe(vcpu_e500, 1, i);
}
}
static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu,
unsigned int eaddr, int as)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
unsigned int victim, pidsel, tsized;
int tlbsel;
/* since we only have two TLBs, only lower bit is used. */
tlbsel = (vcpu_e500->mas4 >> 28) & 0x1;
victim = (tlbsel == 0) ? tlb0_get_next_victim(vcpu_e500) : 0;
pidsel = (vcpu_e500->mas4 >> 16) & 0xf;
tsized = (vcpu_e500->mas4 >> 7) & 0x1f;
vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim)
| MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]);
vcpu_e500->mas1 = MAS1_VALID | (as ? MAS1_TS : 0)
| MAS1_TID(vcpu_e500->pid[pidsel])
| MAS1_TSIZE(tsized);
vcpu_e500->mas2 = (eaddr & MAS2_EPN)
| (vcpu_e500->mas4 & MAS2_ATTRIB_MASK);
vcpu_e500->mas3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3;
vcpu_e500->mas6 = (vcpu_e500->mas6 & MAS6_SPID1)
| (get_cur_pid(vcpu) << 16)
| (as ? MAS6_SAS : 0);
vcpu_e500->mas7 = 0;
}
static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
u64 gvaddr, gfn_t gfn, struct tlbe *gtlbe, int tlbsel, int esel)
{
struct page *new_page;
struct tlbe *stlbe;
hpa_t hpaddr;
stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel];
/* Get reference to new page. */
new_page = gfn_to_page(vcpu_e500->vcpu.kvm, gfn);
if (is_error_page(new_page)) {
printk(KERN_ERR "Couldn't get guest page for gfn %lx!\n", gfn);
kvm_release_page_clean(new_page);
return;
}
hpaddr = page_to_phys(new_page);
/* Drop reference to old page. */
kvmppc_e500_shadow_release(vcpu_e500, tlbsel, esel);
vcpu_e500->shadow_pages[tlbsel][esel] = new_page;
/* Force TS=1 IPROT=0 TSIZE=4KB for all guest mappings. */
stlbe->mas1 = MAS1_TSIZE(BOOK3E_PAGESZ_4K)
| MAS1_TID(get_tlb_tid(gtlbe)) | MAS1_TS | MAS1_VALID;
stlbe->mas2 = (gvaddr & MAS2_EPN)
| e500_shadow_mas2_attrib(gtlbe->mas2,
vcpu_e500->vcpu.arch.msr & MSR_PR);
stlbe->mas3 = (hpaddr & MAS3_RPN)
| e500_shadow_mas3_attrib(gtlbe->mas3,
vcpu_e500->vcpu.arch.msr & MSR_PR);
stlbe->mas7 = (hpaddr >> 32) & MAS7_RPN;
trace_kvm_stlb_write(index_of(tlbsel, esel), stlbe->mas1, stlbe->mas2,
stlbe->mas3, stlbe->mas7);
}
/* XXX only map the one-one case, for now use TLB0 */
static int kvmppc_e500_stlbe_map(struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel, int esel)
{
struct tlbe *gtlbe;
gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
kvmppc_e500_shadow_map(vcpu_e500, get_tlb_eaddr(gtlbe),
get_tlb_raddr(gtlbe) >> PAGE_SHIFT,
gtlbe, tlbsel, esel);
return esel;
}
/* Caller must ensure that the specified guest TLB entry is safe to insert into
* the shadow TLB. */
/* XXX for both one-one and one-to-many , for now use TLB1 */
static int kvmppc_e500_tlb1_map(struct kvmppc_vcpu_e500 *vcpu_e500,
u64 gvaddr, gfn_t gfn, struct tlbe *gtlbe)
{
unsigned int victim;
victim = vcpu_e500->guest_tlb_nv[1]++;
if (unlikely(vcpu_e500->guest_tlb_nv[1] >= tlb1_max_shadow_size()))
vcpu_e500->guest_tlb_nv[1] = 0;
kvmppc_e500_shadow_map(vcpu_e500, gvaddr, gfn, gtlbe, 1, victim);
return victim;
}
/* Invalidate all guest kernel mappings when enter usermode,
* so that when they fault back in they will get the
* proper permission bits. */
void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode)
{
if (usermode) {
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int i;
/* XXX Replace loop with fancy data structures. */
for (i = 0; i < tlb1_max_shadow_size(); i++)
kvmppc_e500_stlbe_invalidate(vcpu_e500, 1, i);
_tlbil_all();
}
}
static int kvmppc_e500_gtlbe_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel, int esel)
{
struct tlbe *gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
if (unlikely(get_tlb_iprot(gtlbe)))
return -1;
if (tlbsel == 1) {
kvmppc_e500_tlb1_invalidate(vcpu_e500, get_tlb_eaddr(gtlbe),
get_tlb_end(gtlbe),
get_tlb_tid(gtlbe));
} else {
kvmppc_e500_stlbe_invalidate(vcpu_e500, tlbsel, esel);
}
gtlbe->mas1 = 0;
return 0;
}
int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value)
{
int esel;
if (value & MMUCSR0_TLB0FI)
for (esel = 0; esel < vcpu_e500->guest_tlb_size[0]; esel++)
kvmppc_e500_gtlbe_invalidate(vcpu_e500, 0, esel);
if (value & MMUCSR0_TLB1FI)
for (esel = 0; esel < vcpu_e500->guest_tlb_size[1]; esel++)
kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel);
_tlbil_all();
return EMULATE_DONE;
}
int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
unsigned int ia;
int esel, tlbsel;
gva_t ea;
ea = ((ra) ? kvmppc_get_gpr(vcpu, ra) : 0) + kvmppc_get_gpr(vcpu, rb);
ia = (ea >> 2) & 0x1;
/* since we only have two TLBs, only lower bit is used. */
tlbsel = (ea >> 3) & 0x1;
if (ia) {
/* invalidate all entries */
for (esel = 0; esel < vcpu_e500->guest_tlb_size[tlbsel]; esel++)
kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
} else {
ea &= 0xfffff000;
esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel,
get_cur_pid(vcpu), -1);
if (esel >= 0)
kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
}
_tlbil_all();
return EMULATE_DONE;
}
int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int tlbsel, esel;
struct tlbe *gtlbe;
tlbsel = get_tlb_tlbsel(vcpu_e500);
esel = get_tlb_esel(vcpu_e500, tlbsel);
gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
vcpu_e500->mas0 &= ~MAS0_NV(~0);
vcpu_e500->mas0 |= MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]);
vcpu_e500->mas1 = gtlbe->mas1;
vcpu_e500->mas2 = gtlbe->mas2;
vcpu_e500->mas3 = gtlbe->mas3;
vcpu_e500->mas7 = gtlbe->mas7;
return EMULATE_DONE;
}
int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int as = !!get_cur_sas(vcpu_e500);
unsigned int pid = get_cur_spid(vcpu_e500);
int esel, tlbsel;
struct tlbe *gtlbe = NULL;
gva_t ea;
ea = kvmppc_get_gpr(vcpu, rb);
for (tlbsel = 0; tlbsel < 2; tlbsel++) {
esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, as);
if (esel >= 0) {
gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
break;
}
}
if (gtlbe) {
vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(esel)
| MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]);
vcpu_e500->mas1 = gtlbe->mas1;
vcpu_e500->mas2 = gtlbe->mas2;
vcpu_e500->mas3 = gtlbe->mas3;
vcpu_e500->mas7 = gtlbe->mas7;
} else {
int victim;
/* since we only have two TLBs, only lower bit is used. */
tlbsel = vcpu_e500->mas4 >> 28 & 0x1;
victim = (tlbsel == 0) ? tlb0_get_next_victim(vcpu_e500) : 0;
vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim)
| MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]);
vcpu_e500->mas1 = (vcpu_e500->mas6 & MAS6_SPID0)
| (vcpu_e500->mas6 & (MAS6_SAS ? MAS1_TS : 0))
| (vcpu_e500->mas4 & MAS4_TSIZED(~0));
vcpu_e500->mas2 &= MAS2_EPN;
vcpu_e500->mas2 |= vcpu_e500->mas4 & MAS2_ATTRIB_MASK;
vcpu_e500->mas3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3;
vcpu_e500->mas7 = 0;
}
return EMULATE_DONE;
}
int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
u64 eaddr;
u64 raddr;
u32 tid;
struct tlbe *gtlbe;
int tlbsel, esel, stlbsel, sesel;
tlbsel = get_tlb_tlbsel(vcpu_e500);
esel = get_tlb_esel(vcpu_e500, tlbsel);
gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
if (get_tlb_v(gtlbe) && tlbsel == 1) {
eaddr = get_tlb_eaddr(gtlbe);
tid = get_tlb_tid(gtlbe);
kvmppc_e500_tlb1_invalidate(vcpu_e500, eaddr,
get_tlb_end(gtlbe), tid);
}
gtlbe->mas1 = vcpu_e500->mas1;
gtlbe->mas2 = vcpu_e500->mas2;
gtlbe->mas3 = vcpu_e500->mas3;
gtlbe->mas7 = vcpu_e500->mas7;
trace_kvm_gtlb_write(vcpu_e500->mas0, gtlbe->mas1, gtlbe->mas2,
gtlbe->mas3, gtlbe->mas7);
/* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
if (tlbe_is_host_safe(vcpu, gtlbe)) {
switch (tlbsel) {
case 0:
/* TLB0 */
gtlbe->mas1 &= ~MAS1_TSIZE(~0);
gtlbe->mas1 |= MAS1_TSIZE(BOOK3E_PAGESZ_4K);
stlbsel = 0;
sesel = kvmppc_e500_stlbe_map(vcpu_e500, 0, esel);
break;
case 1:
/* TLB1 */
eaddr = get_tlb_eaddr(gtlbe);
raddr = get_tlb_raddr(gtlbe);
/* 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. */
stlbsel = 1;
sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr,
raddr >> PAGE_SHIFT, gtlbe);
break;
default:
BUG();
}
write_host_tlbe(vcpu_e500, stlbsel, sesel);
}
return EMULATE_DONE;
}
int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
{
unsigned int as = !!(vcpu->arch.msr & MSR_IS);
return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as);
}
int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
{
unsigned int as = !!(vcpu->arch.msr & MSR_DS);
return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as);
}
void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu)
{
unsigned int as = !!(vcpu->arch.msr & MSR_IS);
kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.pc, as);
}
void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu)
{
unsigned int as = !!(vcpu->arch.msr & MSR_DS);
kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.fault_dear, as);
}
gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int index,
gva_t eaddr)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
struct tlbe *gtlbe =
&vcpu_e500->guest_tlb[tlbsel_of(index)][esel_of(index)];
u64 pgmask = get_tlb_bytes(gtlbe) - 1;
return get_tlb_raddr(gtlbe) | (eaddr & pgmask);
}
void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int tlbsel, i;
for (tlbsel = 0; tlbsel < 2; tlbsel++)
for (i = 0; i < vcpu_e500->guest_tlb_size[tlbsel]; i++)
kvmppc_e500_shadow_release(vcpu_e500, tlbsel, i);
/* discard all guest mapping */
_tlbil_all();
}
void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,
unsigned int index)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int tlbsel = tlbsel_of(index);
int esel = esel_of(index);
int stlbsel, sesel;
switch (tlbsel) {
case 0:
stlbsel = 0;
sesel = esel;
break;
case 1: {
gfn_t gfn = gpaddr >> PAGE_SHIFT;
struct tlbe *gtlbe
= &vcpu_e500->guest_tlb[tlbsel][esel];
stlbsel = 1;
sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr, gfn, gtlbe);
break;
}
default:
BUG();
break;
}
write_host_tlbe(vcpu_e500, stlbsel, sesel);
}
int kvmppc_e500_tlb_search(struct kvm_vcpu *vcpu,
gva_t eaddr, unsigned int pid, int as)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int esel, tlbsel;
for (tlbsel = 0; tlbsel < 2; tlbsel++) {
esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr, tlbsel, pid, as);
if (esel >= 0)
return index_of(tlbsel, esel);
}
return -1;
}
void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *vcpu_e500)
{
struct tlbe *tlbe;
/* Insert large initial mapping for guest. */
tlbe = &vcpu_e500->guest_tlb[1][0];
tlbe->mas1 = MAS1_VALID | MAS1_TSIZE(BOOK3E_PAGESZ_256M);
tlbe->mas2 = 0;
tlbe->mas3 = E500_TLB_SUPER_PERM_MASK;
tlbe->mas7 = 0;
/* 4K map for serial output. Used by kernel wrapper. */
tlbe = &vcpu_e500->guest_tlb[1][1];
tlbe->mas1 = MAS1_VALID | MAS1_TSIZE(BOOK3E_PAGESZ_4K);
tlbe->mas2 = (0xe0004500 & 0xFFFFF000) | MAS2_I | MAS2_G;
tlbe->mas3 = (0xe0004500 & 0xFFFFF000) | E500_TLB_SUPER_PERM_MASK;
tlbe->mas7 = 0;
}
int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500)
{
tlb1_entry_num = mfspr(SPRN_TLB1CFG) & 0xFFF;
vcpu_e500->guest_tlb_size[0] = KVM_E500_TLB0_SIZE;
vcpu_e500->guest_tlb[0] =
kzalloc(sizeof(struct tlbe) * KVM_E500_TLB0_SIZE, GFP_KERNEL);
if (vcpu_e500->guest_tlb[0] == NULL)
goto err_out;
vcpu_e500->shadow_tlb_size[0] = KVM_E500_TLB0_SIZE;
vcpu_e500->shadow_tlb[0] =
kzalloc(sizeof(struct tlbe) * KVM_E500_TLB0_SIZE, GFP_KERNEL);
if (vcpu_e500->shadow_tlb[0] == NULL)
goto err_out_guest0;
vcpu_e500->guest_tlb_size[1] = KVM_E500_TLB1_SIZE;
vcpu_e500->guest_tlb[1] =
kzalloc(sizeof(struct tlbe) * KVM_E500_TLB1_SIZE, GFP_KERNEL);
if (vcpu_e500->guest_tlb[1] == NULL)
goto err_out_shadow0;
vcpu_e500->shadow_tlb_size[1] = tlb1_entry_num;
vcpu_e500->shadow_tlb[1] =
kzalloc(sizeof(struct tlbe) * tlb1_entry_num, GFP_KERNEL);
if (vcpu_e500->shadow_tlb[1] == NULL)
goto err_out_guest1;
vcpu_e500->shadow_pages[0] = (struct page **)
kzalloc(sizeof(struct page *) * KVM_E500_TLB0_SIZE, GFP_KERNEL);
if (vcpu_e500->shadow_pages[0] == NULL)
goto err_out_shadow1;
vcpu_e500->shadow_pages[1] = (struct page **)
kzalloc(sizeof(struct page *) * tlb1_entry_num, GFP_KERNEL);
if (vcpu_e500->shadow_pages[1] == NULL)
goto err_out_page0;
/* Init TLB configuration register */
vcpu_e500->tlb0cfg = mfspr(SPRN_TLB0CFG) & ~0xfffUL;
vcpu_e500->tlb0cfg |= vcpu_e500->guest_tlb_size[0];
vcpu_e500->tlb1cfg = mfspr(SPRN_TLB1CFG) & ~0xfffUL;
vcpu_e500->tlb1cfg |= vcpu_e500->guest_tlb_size[1];
return 0;
err_out_page0:
kfree(vcpu_e500->shadow_pages[0]);
err_out_shadow1:
kfree(vcpu_e500->shadow_tlb[1]);
err_out_guest1:
kfree(vcpu_e500->guest_tlb[1]);
err_out_shadow0:
kfree(vcpu_e500->shadow_tlb[0]);
err_out_guest0:
kfree(vcpu_e500->guest_tlb[0]);
err_out:
return -1;
}
void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500)
{
kfree(vcpu_e500->shadow_pages[1]);
kfree(vcpu_e500->shadow_pages[0]);
kfree(vcpu_e500->shadow_tlb[1]);
kfree(vcpu_e500->guest_tlb[1]);
kfree(vcpu_e500->shadow_tlb[0]);
kfree(vcpu_e500->guest_tlb[0]);
}
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