diff options
author | David Gibson <david@gibson.dropbear.id.au> | 2013-03-12 00:31:26 +0000 |
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committer | Alexander Graf <agraf@suse.de> | 2013-03-22 15:28:49 +0100 |
commit | bb218042c8b4e4bbcf2ab3c8d961d78876178831 (patch) | |
tree | 6b8af7b268ae707e843a36ee6564f2a35f69bea9 /target-ppc/mmu-hash32.c | |
parent | 723ed73ada1ed66a67722f3051059f634d60ebf7 (diff) | |
download | hqemu-bb218042c8b4e4bbcf2ab3c8d961d78876178831.zip hqemu-bb218042c8b4e4bbcf2ab3c8d961d78876178831.tar.gz |
mmu-hash*: Cleanup segment-level NX check
On the ppc hash mmus, no-execute can be set at the segment level (on more
recent 64-bit hash mmus it can also be set at the page level). This patch
separates out this check to make it clearer what is going on, and avoiding
excessive indentation of the remaining translation code.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc/mmu-hash32.c')
-rw-r--r-- | target-ppc/mmu-hash32.c | 98 |
1 files changed, 49 insertions, 49 deletions
diff --git a/target-ppc/mmu-hash32.c b/target-ppc/mmu-hash32.c index dbde264..d812adb 100644 --- a/target-ppc/mmu-hash32.c +++ b/target-ppc/mmu-hash32.c @@ -466,10 +466,16 @@ static int ppc_hash32_translate(CPUPPCState *env, struct mmu_ctx_hash32 *ctx, &ctx->raddr, &ctx->prot); } + /* 5. Check for segment level no-execute violation */ + ctx->nx = !!(sr & SR32_NX); + if ((rwx == 2) && ctx->nx) { + return -3; + } + pr = msr_pr; ctx->key = (((sr & SR32_KP) && (pr != 0)) || ((sr & SR32_KS) && (pr == 0))) ? 1 : 0; - ctx->nx = !!(sr & SR32_NX); + vsid = sr & SR32_VSID; target_page_bits = TARGET_PAGE_BITS; LOG_MMU("Check segment v=" TARGET_FMT_lx " %d " TARGET_FMT_lx " nip=" @@ -485,59 +491,53 @@ static int ppc_hash32_translate(CPUPPCState *env, struct mmu_ctx_hash32 *ctx, ctx->key, ctx->nx, vsid); ret = -1; - /* Check if instruction fetch is allowed, if needed */ - if (rwx != 2 || ctx->nx == 0) { - /* Page address translation */ - LOG_MMU("htab_base " TARGET_FMT_plx " htab_mask " TARGET_FMT_plx - " hash " TARGET_FMT_plx "\n", - env->htab_base, env->htab_mask, hash); - ctx->hash[0] = hash; - ctx->hash[1] = ~hash; - - /* Initialize real address with an invalid value */ - ctx->raddr = (hwaddr)-1ULL; - LOG_MMU("0 htab=" TARGET_FMT_plx "/" TARGET_FMT_plx - " vsid=" TARGET_FMT_lx " ptem=" TARGET_FMT_lx - " hash=" TARGET_FMT_plx "\n", - env->htab_base, env->htab_mask, vsid, ctx->ptem, - ctx->hash[0]); - /* Primary table lookup */ - ret = find_pte32(env, ctx, eaddr, 0, rwx, target_page_bits); - if (ret < 0) { - /* Secondary table lookup */ - LOG_MMU("1 htab=" TARGET_FMT_plx "/" TARGET_FMT_plx - " vsid=" TARGET_FMT_lx " api=" TARGET_FMT_lx - " hash=" TARGET_FMT_plx "\n", env->htab_base, - env->htab_mask, vsid, ctx->ptem, ctx->hash[1]); - ret2 = find_pte32(env, ctx, eaddr, 1, rwx, target_page_bits); - if (ret2 != -1) { - ret = ret2; - } + /* Page address translation */ + LOG_MMU("htab_base " TARGET_FMT_plx " htab_mask " TARGET_FMT_plx + " hash " TARGET_FMT_plx "\n", + env->htab_base, env->htab_mask, hash); + ctx->hash[0] = hash; + ctx->hash[1] = ~hash; + + /* Initialize real address with an invalid value */ + ctx->raddr = (hwaddr)-1ULL; + LOG_MMU("0 htab=" TARGET_FMT_plx "/" TARGET_FMT_plx + " vsid=" TARGET_FMT_lx " ptem=" TARGET_FMT_lx + " hash=" TARGET_FMT_plx "\n", + env->htab_base, env->htab_mask, vsid, ctx->ptem, + ctx->hash[0]); + /* Primary table lookup */ + ret = find_pte32(env, ctx, eaddr, 0, rwx, target_page_bits); + if (ret < 0) { + /* Secondary table lookup */ + LOG_MMU("1 htab=" TARGET_FMT_plx "/" TARGET_FMT_plx + " vsid=" TARGET_FMT_lx " api=" TARGET_FMT_lx + " hash=" TARGET_FMT_plx "\n", env->htab_base, + env->htab_mask, vsid, ctx->ptem, ctx->hash[1]); + ret2 = find_pte32(env, ctx, eaddr, 1, rwx, target_page_bits); + if (ret2 != -1) { + ret = ret2; } + } #if defined(DUMP_PAGE_TABLES) - if (qemu_log_enabled()) { - hwaddr curaddr; - uint32_t a0, a1, a2, a3; - - qemu_log("Page table: " TARGET_FMT_plx " len " TARGET_FMT_plx - "\n", sdr, mask + 0x80); - for (curaddr = sdr; curaddr < (sdr + mask + 0x80); - curaddr += 16) { - a0 = ldl_phys(curaddr); - a1 = ldl_phys(curaddr + 4); - a2 = ldl_phys(curaddr + 8); - a3 = ldl_phys(curaddr + 12); - if (a0 != 0 || a1 != 0 || a2 != 0 || a3 != 0) { - qemu_log(TARGET_FMT_plx ": %08x %08x %08x %08x\n", - curaddr, a0, a1, a2, a3); - } + if (qemu_log_enabled()) { + hwaddr curaddr; + uint32_t a0, a1, a2, a3; + + qemu_log("Page table: " TARGET_FMT_plx " len " TARGET_FMT_plx + "\n", sdr, mask + 0x80); + for (curaddr = sdr; curaddr < (sdr + mask + 0x80); + curaddr += 16) { + a0 = ldl_phys(curaddr); + a1 = ldl_phys(curaddr + 4); + a2 = ldl_phys(curaddr + 8); + a3 = ldl_phys(curaddr + 12); + if (a0 != 0 || a1 != 0 || a2 != 0 || a3 != 0) { + qemu_log(TARGET_FMT_plx ": %08x %08x %08x %08x\n", + curaddr, a0, a1, a2, a3); } } -#endif - } else { - LOG_MMU("No access allowed\n"); - ret = -3; } +#endif return ret; } |