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[2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id z12-20020a05600c220c00b003cd9c26a0basm2971084wml.40.2022.10.25.09.40.24 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Oct 2022 09:40:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=P4/S2TnBMuR4066WO10l47QBPXMq0WIsweFwKXDKptw=; b=ydtjjEuLKaMYSh3N3yZongEp5mNdNTZ6k/z3JROmTbt5Wuce49tgc/oKnYgfgE77bs jYZd1ccbJH9SvhCKHBpAlII8/EtDi//4YmdAIBA7GQikblfY7Y2Loa+obAvFKX0ZMzms PfeaFu/5RKdSz9J5LSU9v6K6phPR3/Nzvp5l91P0yQWCXsvml/8NIhoNMMQUVwQHjI/M YlU0RrX8dwTHvl1bm/MgS14xDbGlUSLTa7MXHpBmqVzfHnkhb6iJC5a/bXXe2DTU2uKk 8LXyBPKsoeVKtEYWOQ27Z+M1e74vC5wcJONjUUS8qu2RnoduWqSYi6f4F0BPz98CdG6X p39A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=P4/S2TnBMuR4066WO10l47QBPXMq0WIsweFwKXDKptw=; b=zXYu2QfD3PUGzvuLPvfzy21ywg7xdKInJmxxXn+i5nJX9XqHn6PuvesEhHx58RHROV l2KRs5ZH2l38bbcCb9cPzJpN4tfB4WKnGAdO+CGQfCem2fkUT8YWXVKI4pQEowAG3wfb gq4pxuGCDDKxOALEeAYF+XmKfhf0qHJjKZYzFl8nG2zBm0WKClx/I/7raQSatyWT0feF 8w1yccsrB8LjepAD/dlyZtaNDkmBdyJ9x2F6un9blwH/iOiASiXIXY0kChPZtt1QmC5e N+bZUZmacS9vImic76dlwTGzheikCzf1epdpZV2xgcb4EH4YffErhnN8ISt/W3myzFiG xHxw== X-Gm-Message-State: ACrzQf1kQBrONrvtA4wl0YCPoD1hydvBjVCCx2++G8sGSQc+XRd7uSz0 eLLwjyeBQo0EzyTGl+MPnHRk5iQq3Jj68w== X-Google-Smtp-Source: AMsMyM7ggFBMe6c/l3EHKr2/cqZujnV0PhcUKu79nZ6x1lohf3mhK4+2lc13Y6P11pmlZIgM8vgClg== X-Received: by 2002:adf:e609:0:b0:235:f4e6:c7c1 with SMTP id p9-20020adfe609000000b00235f4e6c7c1mr19595917wrm.217.1666716025788; Tue, 25 Oct 2022 09:40:25 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 27/30] m68k/q800: do not re-randomize RNG seed on snapshot load Date: Tue, 25 Oct 2022 17:39:49 +0100 Message-Id: <20221025163952.4131046-28-peter.maydell@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221025163952.4131046-1-peter.maydell@linaro.org> References: <20221025163952.4131046-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::42a; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x42a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Qemu-devel" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1666716342202100003 Content-Type: text/plain; charset="utf-8" From: "Jason A. Donenfeld" Snapshot loading is supposed to be deterministic, so we shouldn't re-randomize the various seeds used. Signed-off-by: Jason A. Donenfeld Message-id: 20221025004327.568476-8-Jason@zx2c4.com Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- hw/m68k/q800.c | 33 +++++++++++++-------------------- 1 file changed, 13 insertions(+), 20 deletions(-) diff --git a/hw/m68k/q800.c b/hw/m68k/q800.c index e09e244ddc1..9d52ca66131 100644 --- a/hw/m68k/q800.c +++ b/hw/m68k/q800.c @@ -321,27 +321,23 @@ static const TypeInfo glue_info =3D { }, }; =20 -typedef struct { - M68kCPU *cpu; - struct bi_record *rng_seed; -} ResetInfo; - static void main_cpu_reset(void *opaque) { - ResetInfo *reset_info =3D opaque; - M68kCPU *cpu =3D reset_info->cpu; + M68kCPU *cpu =3D opaque; CPUState *cs =3D CPU(cpu); =20 - if (reset_info->rng_seed) { - qemu_guest_getrandom_nofail((void *)reset_info->rng_seed->data + 2, - be16_to_cpu(*(uint16_t *)reset_info->rng_seed->data)); - } - cpu_reset(cs); cpu->env.aregs[7] =3D ldl_phys(cs->as, 0); cpu->env.pc =3D ldl_phys(cs->as, 4); } =20 +static void rerandomize_rng_seed(void *opaque) +{ + struct bi_record *rng_seed =3D opaque; + qemu_guest_getrandom_nofail((void *)rng_seed->data + 2, + be16_to_cpu(*(uint16_t *)rng_seed->data)); +} + static uint8_t fake_mac_rom[] =3D { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, =20 @@ -397,7 +393,6 @@ static void q800_init(MachineState *machine) NubusBus *nubus; DeviceState *glue; DriveInfo *dinfo; - ResetInfo *reset_info; uint8_t rng_seed[32]; =20 linux_boot =3D (kernel_filename !=3D NULL); @@ -408,12 +403,9 @@ static void q800_init(MachineState *machine) exit(1); } =20 - reset_info =3D g_new0(ResetInfo, 1); - /* init CPUs */ cpu =3D M68K_CPU(cpu_create(machine->cpu_type)); - reset_info->cpu =3D cpu; - qemu_register_reset(main_cpu_reset, reset_info); + qemu_register_reset(main_cpu_reset, cpu); =20 /* RAM */ memory_region_add_subregion(get_system_memory(), 0, machine->ram); @@ -687,9 +679,10 @@ static void q800_init(MachineState *machine) BOOTINFO0(param_ptr, BI_LAST); rom_add_blob_fixed_as("bootinfo", param_blob, param_ptr - param_bl= ob, parameters_base, cs->as); - reset_info->rng_seed =3D rom_ptr_for_as(cs->as, parameters_base, - param_ptr - param_blob) + - (param_rng_seed - param_blob); + qemu_register_reset_nosnapshotload(rerandomize_rng_seed, + rom_ptr_for_as(cs->as, parameters_base, + param_ptr - param_blob) + + (param_rng_seed - param_blob)); g_free(param_blob); } else { uint8_t *ptr; --=20 2.25.1