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Donenfeld" , =?UTF-8?q?Alex=20Benn=C3=A9e?= Subject: [PULL 7/9] hw/guest-loader: pass random seed to fdt Date: Thu, 21 Jul 2022 18:36:19 +0200 Message-Id: <20220721163621.761513-8-pbonzini@redhat.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220721163621.761513-1-pbonzini@redhat.com> References: <20220721163621.761513-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Type: text/plain Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.129.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, PP_MIME_FAKE_ASCII_TEXT=0.999, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: "Jason A. Donenfeld" If the FDT contains /chosen/rng-seed, then the Linux RNG will use it to initialize early. Set this using the usual guest random number generation function. This FDT node is part of the DT specification. Cc: Alex BennĂ©e Signed-off-by: Jason A. Donenfeld Message-Id: <20220719121559.135355-1-Jason@zx2c4.com> Signed-off-by: Paolo Bonzini --- hw/core/guest-loader.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/core/guest-loader.c b/hw/core/guest-loader.c index 391c875a29..4f8572693c 100644 --- a/hw/core/guest-loader.c +++ b/hw/core/guest-loader.c @@ -31,6 +31,7 @@ #include "hw/qdev-properties.h" #include "qapi/error.h" #include "qemu/module.h" +#include "qemu/guest-random.h" #include "guest-loader.h" #include "sysemu/device_tree.h" #include "hw/boards.h" @@ -46,6 +47,7 @@ static void loader_insert_platform_data(GuestLoaderState *s, int size, g_autofree char *node = g_strdup_printf("/chosen/module@0x%08" PRIx64, s->addr); uint64_t reg_attr[2] = {cpu_to_be64(s->addr), cpu_to_be64(size)}; + uint8_t rng_seed[32]; if (!fdt) { error_setg(errp, "Cannot modify FDT fields if the machine has none"); @@ -55,6 +57,9 @@ static void loader_insert_platform_data(GuestLoaderState *s, int size, qemu_fdt_add_subnode(fdt, node); qemu_fdt_setprop(fdt, node, "reg", ®_attr, sizeof(reg_attr)); + qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); + qemu_fdt_setprop(fdt, node, "rng-seed", rng_seed, sizeof(rng_seed)); + if (s->kernel) { const char *compat[2] = { "multiboot,module", "multiboot,kernel" }; if (qemu_fdt_setprop_string_array(fdt, node, "compatible", -- 2.36.1