cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

fdt.c (1340B)

      1/*
      2 * QEMU PowerPC helper routines for the device tree.
      3 *
      4 * Copyright (C) 2016 IBM Corp.
      5 *
      6 * This code is licensed under the GPL version 2 or later. See the
      7 * COPYING file in the top-level directory.
      8 */
      9
     10#include "qemu/osdep.h"
     11#include "target/ppc/cpu.h"
     12#include "target/ppc/mmu-hash64.h"
     13
     14#include "hw/ppc/fdt.h"
     15
     16#if defined(TARGET_PPC64)
     17size_t ppc_create_page_sizes_prop(PowerPCCPU *cpu, uint32_t *prop,
     18                                  size_t maxsize)
     19{
     20    size_t maxcells = maxsize / sizeof(uint32_t);
     21    int i, j, count;
     22    uint32_t *p = prop;
     23
     24    for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) {
     25        PPCHash64SegmentPageSizes *sps = &cpu->hash64_opts->sps[i];
     26
     27        if (!sps->page_shift) {
     28            break;
     29        }
     30        for (count = 0; count < PPC_PAGE_SIZES_MAX_SZ; count++) {
     31            if (sps->enc[count].page_shift == 0) {
     32                break;
     33            }
     34        }
     35        if ((p - prop) >= (maxcells - 3 - count * 2)) {
     36            break;
     37        }
     38        *(p++) = cpu_to_be32(sps->page_shift);
     39        *(p++) = cpu_to_be32(sps->slb_enc);
     40        *(p++) = cpu_to_be32(count);
     41        for (j = 0; j < count; j++) {
     42            *(p++) = cpu_to_be32(sps->enc[j].page_shift);
     43            *(p++) = cpu_to_be32(sps->enc[j].pte_enc);
     44        }
     45    }
     46
     47    return (p - prop) * sizeof(uint32_t);
     48}
     49#endif