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tcg/s390: enable dynamic TLB sizing 

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2018-12-26 15:41:21 +11:00
parent 17ff9f7801
commit 4f47e338f6
2 changed files with 20 additions and 27 deletions
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2
tcg/s390/tcg-target.h
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@ -27,7 +27,7 @@
#define TCG_TARGET_INSN_UNIT_SIZE 2
#define TCG_TARGET_TLB_DISPLACEMENT_BITS 19
#define TCG_TARGET_IMPLEMENTS_DYN_TLB 0
#define TCG_TARGET_IMPLEMENTS_DYN_TLB 1
typedef enum TCGReg {
TCG_REG_R0 = 0,

45
tcg/s390/tcg-target.inc.c
View File

@ -1537,10 +1537,10 @@ static void tcg_out_qemu_st_direct(TCGContext *s, TCGMemOp opc, TCGReg data,
#if defined(CONFIG_SOFTMMU)
#include "tcg-ldst.inc.c"
/* We're expecting to use a 20-bit signed offset on the tlb memory ops.
Using the offset of the second entry in the last tlb table ensures
that we can index all of the elements of the first entry. */
QEMU_BUILD_BUG_ON(offsetof(CPUArchState, tlb_table[NB_MMU_MODES - 1][1])
/* We're expecting to use a 20-bit signed offset on the tlb memory ops. */
QEMU_BUILD_BUG_ON(offsetof(CPUArchState, tlb_mask[NB_MMU_MODES - 1])
> 0x7ffff);
QEMU_BUILD_BUG_ON(offsetof(CPUArchState, tlb_table[NB_MMU_MODES - 1])
> 0x7ffff);
/* Load and compare a TLB entry, leaving the flags set. Loads the TLB
@ -1552,48 +1552,41 @@ static TCGReg tcg_out_tlb_read(TCGContext* s, TCGReg addr_reg, TCGMemOp opc,
unsigned a_bits = get_alignment_bits(opc);
unsigned s_mask = (1 << s_bits) - 1;
unsigned a_mask = (1 << a_bits) - 1;
int mask_off = offsetof(CPUArchState, tlb_mask[mem_index]);
int table_off = offsetof(CPUArchState, tlb_table[mem_index]);
int ofs, a_off;
uint64_t tlb_mask;
tcg_out_sh64(s, RSY_SRLG, TCG_REG_R2, addr_reg, TCG_REG_NONE,
TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
tcg_out_insn(s, RXY, NG, TCG_REG_R2, TCG_AREG0, TCG_REG_NONE, mask_off);
tcg_out_insn(s, RXY, AG, TCG_REG_R2, TCG_AREG0, TCG_REG_NONE, table_off);
/* For aligned accesses, we check the first byte and include the alignment
bits within the address. For unaligned access, we check that we don't
cross pages using the address of the last byte of the access. */
a_off = (a_bits >= s_bits ? 0 : s_mask - a_mask);
tlb_mask = (uint64_t)TARGET_PAGE_MASK | a_mask;
if (s390_facilities & FACILITY_GEN_INST_EXT) {
tcg_out_risbg(s, TCG_REG_R2, addr_reg,
64 - CPU_TLB_BITS - CPU_TLB_ENTRY_BITS,
63 - CPU_TLB_ENTRY_BITS,
64 + CPU_TLB_ENTRY_BITS - TARGET_PAGE_BITS, 1);
if (a_off) {
tcg_out_insn(s, RX, LA, TCG_REG_R3, addr_reg, TCG_REG_NONE, a_off);
tgen_andi(s, TCG_TYPE_TL, TCG_REG_R3, tlb_mask);
} else {
tgen_andi_risbg(s, TCG_REG_R3, addr_reg, tlb_mask);
}
if ((s390_facilities & FACILITY_GEN_INST_EXT) && a_off == 0) {
tgen_andi_risbg(s, TCG_REG_R3, addr_reg, tlb_mask);
} else {
tcg_out_sh64(s, RSY_SRLG, TCG_REG_R2, addr_reg, TCG_REG_NONE,
TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
tcg_out_insn(s, RX, LA, TCG_REG_R3, addr_reg, TCG_REG_NONE, a_off);
tgen_andi(s, TCG_TYPE_I64, TCG_REG_R2,
(CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS);
tgen_andi(s, TCG_TYPE_TL, TCG_REG_R3, tlb_mask);
}
if (is_ld) {
ofs = offsetof(CPUArchState, tlb_table[mem_index][0].addr_read);
ofs = offsetof(CPUTLBEntry, addr_read);
} else {
ofs = offsetof(CPUArchState, tlb_table[mem_index][0].addr_write);
ofs = offsetof(CPUTLBEntry, addr_write);
}
if (TARGET_LONG_BITS == 32) {
tcg_out_mem(s, RX_C, RXY_CY, TCG_REG_R3, TCG_REG_R2, TCG_AREG0, ofs);
tcg_out_insn(s, RX, C, TCG_REG_R3, TCG_REG_R2, TCG_REG_NONE, ofs);
} else {
tcg_out_mem(s, 0, RXY_CG, TCG_REG_R3, TCG_REG_R2, TCG_AREG0, ofs);
tcg_out_insn(s, RXY, CG, TCG_REG_R3, TCG_REG_R2, TCG_REG_NONE, ofs);
}
ofs = offsetof(CPUArchState, tlb_table[mem_index][0].addend);
tcg_out_mem(s, 0, RXY_LG, TCG_REG_R2, TCG_REG_R2, TCG_AREG0, ofs);
tcg_out_insn(s, RXY, LG, TCG_REG_R2, TCG_REG_R2, TCG_REG_NONE,
offsetof(CPUTLBEntry, addend));
if (TARGET_LONG_BITS == 32) {
tgen_ext32u(s, TCG_REG_R3, addr_reg);