root / hw / spapr_hcall.c @ 06c46bba
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| 1 |
#include "sysemu.h" |
|---|---|
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#include "cpu.h" |
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#include "qemu-char.h" |
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#include "sysemu.h" |
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#include "qemu-char.h" |
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#include "exec.h" |
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#include "helper_regs.h" |
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#include "hw/spapr.h" |
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|
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#define HPTES_PER_GROUP 8 |
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|
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#define HPTE_V_SSIZE_SHIFT 62 |
| 13 |
#define HPTE_V_AVPN_SHIFT 7 |
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#define HPTE_V_AVPN 0x3fffffffffffff80ULL |
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#define HPTE_V_AVPN_VAL(x) (((x) & HPTE_V_AVPN) >> HPTE_V_AVPN_SHIFT)
|
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#define HPTE_V_COMPARE(x, y) (!(((x) ^ (y)) & 0xffffffffffffff80UL)) |
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#define HPTE_V_BOLTED 0x0000000000000010ULL |
| 18 |
#define HPTE_V_LOCK 0x0000000000000008ULL |
| 19 |
#define HPTE_V_LARGE 0x0000000000000004ULL |
| 20 |
#define HPTE_V_SECONDARY 0x0000000000000002ULL |
| 21 |
#define HPTE_V_VALID 0x0000000000000001ULL |
| 22 |
|
| 23 |
#define HPTE_R_PP0 0x8000000000000000ULL |
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#define HPTE_R_TS 0x4000000000000000ULL |
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#define HPTE_R_KEY_HI 0x3000000000000000ULL |
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#define HPTE_R_RPN_SHIFT 12 |
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#define HPTE_R_RPN 0x3ffffffffffff000ULL |
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#define HPTE_R_FLAGS 0x00000000000003ffULL |
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#define HPTE_R_PP 0x0000000000000003ULL |
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#define HPTE_R_N 0x0000000000000004ULL |
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#define HPTE_R_G 0x0000000000000008ULL |
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#define HPTE_R_M 0x0000000000000010ULL |
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#define HPTE_R_I 0x0000000000000020ULL |
| 34 |
#define HPTE_R_W 0x0000000000000040ULL |
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#define HPTE_R_WIMG 0x0000000000000078ULL |
| 36 |
#define HPTE_R_C 0x0000000000000080ULL |
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#define HPTE_R_R 0x0000000000000100ULL |
| 38 |
#define HPTE_R_KEY_LO 0x0000000000000e00ULL |
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|
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#define HPTE_V_1TB_SEG 0x4000000000000000ULL |
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#define HPTE_V_VRMA_MASK 0x4001ffffff000000ULL |
| 42 |
|
| 43 |
#define HPTE_V_HVLOCK 0x40ULL |
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|
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static inline int lock_hpte(void *hpte, target_ulong bits) |
| 46 |
{
|
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uint64_t pteh; |
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|
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pteh = ldq_p(hpte); |
| 50 |
|
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/* We're protected by qemu's global lock here */
|
| 52 |
if (pteh & bits) {
|
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return 0; |
| 54 |
} |
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stq_p(hpte, pteh | HPTE_V_HVLOCK); |
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return 1; |
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} |
| 58 |
|
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static target_ulong compute_tlbie_rb(target_ulong v, target_ulong r,
|
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target_ulong pte_index) |
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{
|
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target_ulong rb, va_low; |
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|
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rb = (v & ~0x7fULL) << 16; /* AVA field */ |
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va_low = pte_index >> 3;
|
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if (v & HPTE_V_SECONDARY) {
|
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va_low = ~va_low; |
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} |
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/* xor vsid from AVA */
|
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if (!(v & HPTE_V_1TB_SEG)) {
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va_low ^= v >> 12;
|
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} else {
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va_low ^= v >> 24;
|
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} |
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va_low &= 0x7ff;
|
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if (v & HPTE_V_LARGE) {
|
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rb |= 1; /* L field */ |
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#if 0 /* Disable that P7 specific bit for now */
|
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if (r & 0xff000) {
|
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/* non-16MB large page, must be 64k */
|
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/* (masks depend on page size) */
|
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rb |= 0x1000; /* page encoding in LP field */
|
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rb |= (va_low & 0x7f) << 16; /* 7b of VA in AVA/LP field */
|
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rb |= (va_low & 0xfe); /* AVAL field */
|
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}
|
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#endif
|
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} else {
|
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/* 4kB page */
|
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rb |= (va_low & 0x7ff) << 12; /* remaining 11b of AVA */ |
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} |
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rb |= (v >> 54) & 0x300; /* B field */ |
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return rb;
|
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} |
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|
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static target_ulong h_enter(CPUState *env, sPAPREnvironment *spapr,
|
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target_ulong opcode, target_ulong *args) |
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{
|
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target_ulong flags = args[0];
|
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target_ulong pte_index = args[1];
|
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target_ulong pteh = args[2];
|
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target_ulong ptel = args[3];
|
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target_ulong i; |
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uint8_t *hpte; |
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|
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/* only handle 4k and 16M pages for now */
|
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if (pteh & HPTE_V_LARGE) {
|
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#if 0 /* We don't support 64k pages yet */
|
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if ((ptel & 0xf000) == 0x1000) {
|
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/* 64k page */
|
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} else
|
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#endif
|
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if ((ptel & 0xff000) == 0) { |
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/* 16M page */
|
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/* lowest AVA bit must be 0 for 16M pages */
|
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if (pteh & 0x80) { |
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return H_PARAMETER;
|
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} |
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} else {
|
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return H_PARAMETER;
|
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} |
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} |
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|
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/* FIXME: bounds check the pa? */
|
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|
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/* Check WIMG */
|
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if ((ptel & HPTE_R_WIMG) != HPTE_R_M) {
|
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return H_PARAMETER;
|
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} |
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pteh &= ~0x60ULL;
|
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|
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if ((pte_index * HASH_PTE_SIZE_64) & ~env->htab_mask) {
|
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return H_PARAMETER;
|
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} |
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if (likely((flags & H_EXACT) == 0)) { |
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pte_index &= ~7ULL;
|
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hpte = env->external_htab + (pte_index * HASH_PTE_SIZE_64); |
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for (i = 0; ; ++i) { |
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if (i == 8) { |
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return H_PTEG_FULL;
|
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} |
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if (((ldq_p(hpte) & HPTE_V_VALID) == 0) && |
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lock_hpte(hpte, HPTE_V_HVLOCK | HPTE_V_VALID)) {
|
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break;
|
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} |
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hpte += HASH_PTE_SIZE_64; |
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} |
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} else {
|
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i = 0;
|
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hpte = env->external_htab + (pte_index * HASH_PTE_SIZE_64); |
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if (!lock_hpte(hpte, HPTE_V_HVLOCK | HPTE_V_VALID)) {
|
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return H_PTEG_FULL;
|
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} |
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} |
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stq_p(hpte + (HASH_PTE_SIZE_64/2), ptel);
|
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/* eieio(); FIXME: need some sort of barrier for smp? */
|
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stq_p(hpte, pteh); |
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|
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assert(!(ldq_p(hpte) & HPTE_V_HVLOCK)); |
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args[0] = pte_index + i;
|
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return H_SUCCESS;
|
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} |
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|
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static target_ulong h_remove(CPUState *env, sPAPREnvironment *spapr,
|
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target_ulong opcode, target_ulong *args) |
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{
|
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target_ulong flags = args[0];
|
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target_ulong pte_index = args[1];
|
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target_ulong avpn = args[2];
|
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uint8_t *hpte; |
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target_ulong v, r, rb; |
| 171 |
|
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if ((pte_index * HASH_PTE_SIZE_64) & ~env->htab_mask) {
|
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return H_PARAMETER;
|
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} |
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|
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hpte = env->external_htab + (pte_index * HASH_PTE_SIZE_64); |
| 177 |
while (!lock_hpte(hpte, HPTE_V_HVLOCK)) {
|
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/* We have no real concurrency in qemu soft-emulation, so we
|
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* will never actually have a contested lock */
|
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assert(0);
|
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} |
| 182 |
|
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v = ldq_p(hpte); |
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r = ldq_p(hpte + (HASH_PTE_SIZE_64/2));
|
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|
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if ((v & HPTE_V_VALID) == 0 || |
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((flags & H_AVPN) && (v & ~0x7fULL) != avpn) ||
|
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((flags & H_ANDCOND) && (v & avpn) != 0)) {
|
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stq_p(hpte, v & ~HPTE_V_HVLOCK); |
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assert(!(ldq_p(hpte) & HPTE_V_HVLOCK)); |
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return H_NOT_FOUND;
|
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} |
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args[0] = v & ~HPTE_V_HVLOCK;
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args[1] = r;
|
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stq_p(hpte, 0);
|
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rb = compute_tlbie_rb(v, r, pte_index); |
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ppc_tlb_invalidate_one(env, rb); |
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assert(!(ldq_p(hpte) & HPTE_V_HVLOCK)); |
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return H_SUCCESS;
|
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} |
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|
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static target_ulong h_protect(CPUState *env, sPAPREnvironment *spapr,
|
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target_ulong opcode, target_ulong *args) |
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{
|
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target_ulong flags = args[0];
|
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target_ulong pte_index = args[1];
|
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target_ulong avpn = args[2];
|
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uint8_t *hpte; |
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target_ulong v, r, rb; |
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|
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if ((pte_index * HASH_PTE_SIZE_64) & ~env->htab_mask) {
|
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return H_PARAMETER;
|
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} |
| 214 |
|
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hpte = env->external_htab + (pte_index * HASH_PTE_SIZE_64); |
| 216 |
while (!lock_hpte(hpte, HPTE_V_HVLOCK)) {
|
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/* We have no real concurrency in qemu soft-emulation, so we
|
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* will never actually have a contested lock */
|
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assert(0);
|
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} |
| 221 |
|
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v = ldq_p(hpte); |
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r = ldq_p(hpte + (HASH_PTE_SIZE_64/2));
|
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|
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if ((v & HPTE_V_VALID) == 0 || |
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((flags & H_AVPN) && (v & ~0x7fULL) != avpn)) {
|
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stq_p(hpte, v & ~HPTE_V_HVLOCK); |
| 228 |
assert(!(ldq_p(hpte) & HPTE_V_HVLOCK)); |
| 229 |
return H_NOT_FOUND;
|
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} |
| 231 |
|
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r &= ~(HPTE_R_PP0 | HPTE_R_PP | HPTE_R_N | |
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HPTE_R_KEY_HI | HPTE_R_KEY_LO); |
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r |= (flags << 55) & HPTE_R_PP0;
|
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r |= (flags << 48) & HPTE_R_KEY_HI;
|
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r |= flags & (HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_LO); |
| 237 |
rb = compute_tlbie_rb(v, r, pte_index); |
| 238 |
stq_p(hpte, v & ~HPTE_V_VALID); |
| 239 |
ppc_tlb_invalidate_one(env, rb); |
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stq_p(hpte + (HASH_PTE_SIZE_64/2), r);
|
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/* Don't need a memory barrier, due to qemu's global lock */
|
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stq_p(hpte, v & ~HPTE_V_HVLOCK); |
| 243 |
assert(!(ldq_p(hpte) & HPTE_V_HVLOCK)); |
| 244 |
return H_SUCCESS;
|
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} |
| 246 |
|
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static target_ulong h_set_dabr(CPUState *env, sPAPREnvironment *spapr,
|
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target_ulong opcode, target_ulong *args) |
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{
|
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/* FIXME: actually implement this */
|
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return H_HARDWARE;
|
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} |
| 253 |
|
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#define FLAGS_REGISTER_VPA 0x0000200000000000ULL |
| 255 |
#define FLAGS_REGISTER_DTL 0x0000400000000000ULL |
| 256 |
#define FLAGS_REGISTER_SLBSHADOW 0x0000600000000000ULL |
| 257 |
#define FLAGS_DEREGISTER_VPA 0x0000a00000000000ULL |
| 258 |
#define FLAGS_DEREGISTER_DTL 0x0000c00000000000ULL |
| 259 |
#define FLAGS_DEREGISTER_SLBSHADOW 0x0000e00000000000ULL |
| 260 |
|
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#define VPA_MIN_SIZE 640 |
| 262 |
#define VPA_SIZE_OFFSET 0x4 |
| 263 |
#define VPA_SHARED_PROC_OFFSET 0x9 |
| 264 |
#define VPA_SHARED_PROC_VAL 0x2 |
| 265 |
|
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static target_ulong register_vpa(CPUState *env, target_ulong vpa)
|
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{
|
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uint16_t size; |
| 269 |
uint8_t tmp; |
| 270 |
|
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if (vpa == 0) { |
| 272 |
hcall_dprintf("Can't cope with registering a VPA at logical 0\n");
|
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return H_HARDWARE;
|
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} |
| 275 |
|
| 276 |
if (vpa % env->dcache_line_size) {
|
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return H_PARAMETER;
|
| 278 |
} |
| 279 |
/* FIXME: bounds check the address */
|
| 280 |
|
| 281 |
size = lduw_be_phys(vpa + 0x4);
|
| 282 |
|
| 283 |
if (size < VPA_MIN_SIZE) {
|
| 284 |
return H_PARAMETER;
|
| 285 |
} |
| 286 |
|
| 287 |
/* VPA is not allowed to cross a page boundary */
|
| 288 |
if ((vpa / 4096) != ((vpa + size - 1) / 4096)) { |
| 289 |
return H_PARAMETER;
|
| 290 |
} |
| 291 |
|
| 292 |
env->vpa = vpa; |
| 293 |
|
| 294 |
tmp = ldub_phys(env->vpa + VPA_SHARED_PROC_OFFSET); |
| 295 |
tmp |= VPA_SHARED_PROC_VAL; |
| 296 |
stb_phys(env->vpa + VPA_SHARED_PROC_OFFSET, tmp); |
| 297 |
|
| 298 |
return H_SUCCESS;
|
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} |
| 300 |
|
| 301 |
static target_ulong deregister_vpa(CPUState *env, target_ulong vpa)
|
| 302 |
{
|
| 303 |
if (env->slb_shadow) {
|
| 304 |
return H_RESOURCE;
|
| 305 |
} |
| 306 |
|
| 307 |
if (env->dispatch_trace_log) {
|
| 308 |
return H_RESOURCE;
|
| 309 |
} |
| 310 |
|
| 311 |
env->vpa = 0;
|
| 312 |
return H_SUCCESS;
|
| 313 |
} |
| 314 |
|
| 315 |
static target_ulong register_slb_shadow(CPUState *env, target_ulong addr)
|
| 316 |
{
|
| 317 |
uint32_t size; |
| 318 |
|
| 319 |
if (addr == 0) { |
| 320 |
hcall_dprintf("Can't cope with SLB shadow at logical 0\n");
|
| 321 |
return H_HARDWARE;
|
| 322 |
} |
| 323 |
|
| 324 |
size = ldl_be_phys(addr + 0x4);
|
| 325 |
if (size < 0x8) { |
| 326 |
return H_PARAMETER;
|
| 327 |
} |
| 328 |
|
| 329 |
if ((addr / 4096) != ((addr + size - 1) / 4096)) { |
| 330 |
return H_PARAMETER;
|
| 331 |
} |
| 332 |
|
| 333 |
if (!env->vpa) {
|
| 334 |
return H_RESOURCE;
|
| 335 |
} |
| 336 |
|
| 337 |
env->slb_shadow = addr; |
| 338 |
|
| 339 |
return H_SUCCESS;
|
| 340 |
} |
| 341 |
|
| 342 |
static target_ulong deregister_slb_shadow(CPUState *env, target_ulong addr)
|
| 343 |
{
|
| 344 |
env->slb_shadow = 0;
|
| 345 |
return H_SUCCESS;
|
| 346 |
} |
| 347 |
|
| 348 |
static target_ulong register_dtl(CPUState *env, target_ulong addr)
|
| 349 |
{
|
| 350 |
uint32_t size; |
| 351 |
|
| 352 |
if (addr == 0) { |
| 353 |
hcall_dprintf("Can't cope with DTL at logical 0\n");
|
| 354 |
return H_HARDWARE;
|
| 355 |
} |
| 356 |
|
| 357 |
size = ldl_be_phys(addr + 0x4);
|
| 358 |
|
| 359 |
if (size < 48) { |
| 360 |
return H_PARAMETER;
|
| 361 |
} |
| 362 |
|
| 363 |
if (!env->vpa) {
|
| 364 |
return H_RESOURCE;
|
| 365 |
} |
| 366 |
|
| 367 |
env->dispatch_trace_log = addr; |
| 368 |
env->dtl_size = size; |
| 369 |
|
| 370 |
return H_SUCCESS;
|
| 371 |
} |
| 372 |
|
| 373 |
static target_ulong deregister_dtl(CPUState *emv, target_ulong addr)
|
| 374 |
{
|
| 375 |
env->dispatch_trace_log = 0;
|
| 376 |
env->dtl_size = 0;
|
| 377 |
|
| 378 |
return H_SUCCESS;
|
| 379 |
} |
| 380 |
|
| 381 |
static target_ulong h_register_vpa(CPUState *env, sPAPREnvironment *spapr,
|
| 382 |
target_ulong opcode, target_ulong *args) |
| 383 |
{
|
| 384 |
target_ulong flags = args[0];
|
| 385 |
target_ulong procno = args[1];
|
| 386 |
target_ulong vpa = args[2];
|
| 387 |
target_ulong ret = H_PARAMETER; |
| 388 |
CPUState *tenv; |
| 389 |
|
| 390 |
for (tenv = first_cpu; tenv; tenv = tenv->next_cpu) {
|
| 391 |
if (tenv->cpu_index == procno) {
|
| 392 |
break;
|
| 393 |
} |
| 394 |
} |
| 395 |
|
| 396 |
if (!tenv) {
|
| 397 |
return H_PARAMETER;
|
| 398 |
} |
| 399 |
|
| 400 |
switch (flags) {
|
| 401 |
case FLAGS_REGISTER_VPA:
|
| 402 |
ret = register_vpa(tenv, vpa); |
| 403 |
break;
|
| 404 |
|
| 405 |
case FLAGS_DEREGISTER_VPA:
|
| 406 |
ret = deregister_vpa(tenv, vpa); |
| 407 |
break;
|
| 408 |
|
| 409 |
case FLAGS_REGISTER_SLBSHADOW:
|
| 410 |
ret = register_slb_shadow(tenv, vpa); |
| 411 |
break;
|
| 412 |
|
| 413 |
case FLAGS_DEREGISTER_SLBSHADOW:
|
| 414 |
ret = deregister_slb_shadow(tenv, vpa); |
| 415 |
break;
|
| 416 |
|
| 417 |
case FLAGS_REGISTER_DTL:
|
| 418 |
ret = register_dtl(tenv, vpa); |
| 419 |
break;
|
| 420 |
|
| 421 |
case FLAGS_DEREGISTER_DTL:
|
| 422 |
ret = deregister_dtl(tenv, vpa); |
| 423 |
break;
|
| 424 |
} |
| 425 |
|
| 426 |
return ret;
|
| 427 |
} |
| 428 |
|
| 429 |
static target_ulong h_cede(CPUState *env, sPAPREnvironment *spapr,
|
| 430 |
target_ulong opcode, target_ulong *args) |
| 431 |
{
|
| 432 |
env->msr |= (1ULL << MSR_EE);
|
| 433 |
hreg_compute_hflags(env); |
| 434 |
if (!cpu_has_work(env)) {
|
| 435 |
env->halted = 1;
|
| 436 |
} |
| 437 |
return H_SUCCESS;
|
| 438 |
} |
| 439 |
|
| 440 |
static target_ulong h_rtas(CPUState *env, sPAPREnvironment *spapr,
|
| 441 |
target_ulong opcode, target_ulong *args) |
| 442 |
{
|
| 443 |
target_ulong rtas_r3 = args[0];
|
| 444 |
uint32_t token = ldl_be_phys(rtas_r3); |
| 445 |
uint32_t nargs = ldl_be_phys(rtas_r3 + 4);
|
| 446 |
uint32_t nret = ldl_be_phys(rtas_r3 + 8);
|
| 447 |
|
| 448 |
return spapr_rtas_call(spapr, token, nargs, rtas_r3 + 12, |
| 449 |
nret, rtas_r3 + 12 + 4*nargs); |
| 450 |
} |
| 451 |
|
| 452 |
static spapr_hcall_fn papr_hypercall_table[(MAX_HCALL_OPCODE / 4) + 1]; |
| 453 |
static spapr_hcall_fn kvmppc_hypercall_table[KVMPPC_HCALL_MAX - KVMPPC_HCALL_BASE + 1]; |
| 454 |
|
| 455 |
void spapr_register_hypercall(target_ulong opcode, spapr_hcall_fn fn)
|
| 456 |
{
|
| 457 |
spapr_hcall_fn *slot; |
| 458 |
|
| 459 |
if (opcode <= MAX_HCALL_OPCODE) {
|
| 460 |
assert((opcode & 0x3) == 0); |
| 461 |
|
| 462 |
slot = &papr_hypercall_table[opcode / 4];
|
| 463 |
} else {
|
| 464 |
assert((opcode >= KVMPPC_HCALL_BASE) && (opcode <= KVMPPC_HCALL_MAX)); |
| 465 |
|
| 466 |
|
| 467 |
slot = &kvmppc_hypercall_table[opcode - KVMPPC_HCALL_BASE]; |
| 468 |
} |
| 469 |
|
| 470 |
assert(!(*slot) || (fn == *slot)); |
| 471 |
*slot = fn; |
| 472 |
} |
| 473 |
|
| 474 |
target_ulong spapr_hypercall(CPUState *env, target_ulong opcode, |
| 475 |
target_ulong *args) |
| 476 |
{
|
| 477 |
if (msr_pr) {
|
| 478 |
hcall_dprintf("Hypercall made with MSR[PR]=1\n");
|
| 479 |
return H_PRIVILEGE;
|
| 480 |
} |
| 481 |
|
| 482 |
if ((opcode <= MAX_HCALL_OPCODE)
|
| 483 |
&& ((opcode & 0x3) == 0)) { |
| 484 |
spapr_hcall_fn fn = papr_hypercall_table[opcode / 4];
|
| 485 |
|
| 486 |
if (fn) {
|
| 487 |
return fn(env, spapr, opcode, args);
|
| 488 |
} |
| 489 |
} else if ((opcode >= KVMPPC_HCALL_BASE) && |
| 490 |
(opcode <= KVMPPC_HCALL_MAX)) {
|
| 491 |
spapr_hcall_fn fn = kvmppc_hypercall_table[opcode - KVMPPC_HCALL_BASE]; |
| 492 |
|
| 493 |
if (fn) {
|
| 494 |
return fn(env, spapr, opcode, args);
|
| 495 |
} |
| 496 |
} |
| 497 |
|
| 498 |
hcall_dprintf("Unimplemented hcall 0x" TARGET_FMT_lx "\n", opcode); |
| 499 |
return H_FUNCTION;
|
| 500 |
} |
| 501 |
|
| 502 |
static void hypercall_init(void) |
| 503 |
{
|
| 504 |
/* hcall-pft */
|
| 505 |
spapr_register_hypercall(H_ENTER, h_enter); |
| 506 |
spapr_register_hypercall(H_REMOVE, h_remove); |
| 507 |
spapr_register_hypercall(H_PROTECT, h_protect); |
| 508 |
|
| 509 |
/* hcall-dabr */
|
| 510 |
spapr_register_hypercall(H_SET_DABR, h_set_dabr); |
| 511 |
|
| 512 |
/* hcall-splpar */
|
| 513 |
spapr_register_hypercall(H_REGISTER_VPA, h_register_vpa); |
| 514 |
spapr_register_hypercall(H_CEDE, h_cede); |
| 515 |
|
| 516 |
/* qemu/KVM-PPC specific hcalls */
|
| 517 |
spapr_register_hypercall(KVMPPC_H_RTAS, h_rtas); |
| 518 |
} |
| 519 |
device_init(hypercall_init); |