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[2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id z12-20020a05600c220c00b003cd9c26a0basm2971084wml.40.2022.10.25.09.40.23 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Oct 2022 09:40:24 -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=+Huf0vTV0723KK8XSSSroit5uyfCugRgjfLfrDKUKmw=; b=HoXm89nUZP0V8/7l1odxIt0Yy0+ky/TyxzEQpyLF2fkBCWYv166yzen4yzQSkzjvxH OP8zsnwh/koOMtbtOpl7OzppHcuShhrw6hzU8JJK//4d/l2TAcOj7tfOQ1yetOlLUV4P ErqsEmnJS7oVgjQtZ4D7lRm4+u9C4Z3u6BPJEe2OVprfcMzgjxFGwqQI07Z53oXq2sTW uuoq1jOqGfzV4PFBaEHmJ0ULvAKIBFv/zhKltcr84fumZCTm9JYhhVddrGZVLPe6a6pD 7V4H2SLEEfBdyZZP5X3cOo4mqbZuCNKHXxg/4jU7P2wBDOOLCXiJ4SiXD0Zj00JUEsfm i2qg== 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=+Huf0vTV0723KK8XSSSroit5uyfCugRgjfLfrDKUKmw=; b=0E22aWJkQ+k95j1Bq/sbk9EGlNOwAkV+83+Lg4eTDi+dbkn3ipIKZNVDHJHC65786d jdVZ8SpMdUKmb6887IycX51HWF8KT0J8uh8DKaAvEJqP3gL6JAlIW1kWLJxZSj5Wm9k2 B7ajjE3Wodzfkdr4FXXgVhvZ3UadkirRQuC3JMNNoZLYGrPWHM1QXy3A/w1BjkfKD8Kt Cmxl1jyaX8F+9VJ4Wsbu8ffgvQy07ex06cP4HfUD5Zv9d1rsZ8+EoKJAGUHfl80PyWjD SBS52x/RTLnkHhCh60i1QufmslheV9lH7nJtSCXqnOc566hqThdASAEUZyBAotIoio2m aKMg== X-Gm-Message-State: ACrzQf3hDfP3WjX2AMIbuteQgjwWjMKr6RheBJ5pLcGZknVwz/6ldk1I o9ob3KbjQTowJYDk4lI9O4kIl92L45aDag== X-Google-Smtp-Source: AMsMyM40tkRFlk3z5df8TwgJivmqfqssnxmoqXcR+jOGnJGMAvmSlpMV51bP25kEg/xXsw3bCUdqyg== X-Received: by 2002:a05:6000:42:b0:236:6c52:bc22 with SMTP id k2-20020a056000004200b002366c52bc22mr9674668wrx.692.1666716024833; Tue, 25 Oct 2022 09:40:24 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 26/30] m68k/virt: do not re-randomize RNG seed on snapshot load Date: Tue, 25 Oct 2022 17:39:48 +0100 Message-Id: <20221025163952.4131046-27-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::42f; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x42f.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: 1666716231592100003 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: 20221025004327.568476-7-Jason@zx2c4.com Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- hw/m68k/virt.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/hw/m68k/virt.c b/hw/m68k/virt.c index 89c4108eb54..da5eafd2756 100644 --- a/hw/m68k/virt.c +++ b/hw/m68k/virt.c @@ -89,7 +89,6 @@ typedef struct { M68kCPU *cpu; hwaddr initial_pc; hwaddr initial_stack; - struct bi_record *rng_seed; } ResetInfo; =20 static void main_cpu_reset(void *opaque) @@ -98,16 +97,18 @@ static void main_cpu_reset(void *opaque) M68kCPU *cpu =3D reset_info->cpu; 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 reset_info->initial_stack; cpu->env.pc =3D reset_info->initial_pc; } =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 void virt_init(MachineState *machine) { M68kCPU *cpu =3D NULL; @@ -289,9 +290,10 @@ static void virt_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); } } --=20 2.25.1