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Donenfeld" To: qemu-devel@nongnu.org Cc: "Jason A. Donenfeld" , Paul Burton , Aleksandar Rikalo , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH] hw/mips: boston: pass random seed to fdt Date: Tue, 19 Jul 2022 14:08:43 +0200 Message-Id: <20220719120843.134392-1-Jason@zx2c4.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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=145.40.68.75; envelope-from=SRS0=TnJG=XY=zx2c4.com=Jason@kernel.org; helo=ams.source.kernel.org X-Spam_score_int: -67 X-Spam_score: -6.8 X-Spam_bar: ------ X-Spam_report: (-6.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @zx2c4.com) X-ZM-MESSAGEID: 1658232622276100001 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. I'd do the same for other MIPS platforms but boston is the only one that seems to use FDT. Cc: Paul Burton Cc: Aleksandar Rikalo Cc: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Jason A. Donenfeld --- hw/mips/boston.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/mips/boston.c b/hw/mips/boston.c index 1debca18ec..d2ab9da1a0 100644 --- a/hw/mips/boston.c +++ b/hw/mips/boston.c @@ -34,6 +34,7 @@ #include "hw/qdev-properties.h" #include "qapi/error.h" #include "qemu/error-report.h" +#include "qemu/guest-random.h" #include "qemu/log.h" #include "chardev/char.h" #include "sysemu/device_tree.h" @@ -363,6 +364,7 @@ static const void *boston_fdt_filter(void *opaque, cons= t void *fdt_orig, size_t ram_low_sz, ram_high_sz; size_t fdt_sz =3D fdt_totalsize(fdt_orig) * 2; g_autofree void *fdt =3D g_malloc0(fdt_sz); + uint8_t rng_seed[32]; =20 err =3D fdt_open_into(fdt_orig, fdt, fdt_sz); if (err) { @@ -370,6 +372,9 @@ static const void *boston_fdt_filter(void *opaque, cons= t void *fdt_orig, return NULL; } =20 + qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); + qemu_fdt_setprop(fdt, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed= )); + cmdline =3D (machine->kernel_cmdline && machine->kernel_cmdline[0]) ? machine->kernel_cmdline : " "; err =3D qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline); --=20 2.35.1