From: Stafford Horne <shorne@gmail.com> To: QEMU Development <qemu-devel@nongnu.org> Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>, Openrisc <openrisc@lists.librecores.org>, Richard Henderson <richard.henderson@linaro.org> Subject: [PATCH v3 10/11] hw/openrisc: virt: pass random seed to fdt Date: Sat, 30 Jul 2022 08:01:16 +0900 [thread overview] Message-ID: <20220729230117.3768312-11-shorne@gmail.com> (raw) In-Reply-To: <20220729230117.3768312-1-shorne@gmail.com> From: "Jason A. Donenfeld" <Jason@zx2c4.com> 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 is confirmed to successfully initialize the RNG on Linux 5.19-rc2. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Stafford Horne <shorne@gmail.com> --- Since v2: - No changes hw/openrisc/virt.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/openrisc/virt.c b/hw/openrisc/virt.c index 9a78234a28..f8a68a6a6b 100644 --- a/hw/openrisc/virt.c +++ b/hw/openrisc/virt.c @@ -8,6 +8,7 @@ #include "qemu/osdep.h" #include "qemu/error-report.h" +#include "qemu/guest-random.h" #include "qapi/error.h" #include "cpu.h" #include "exec/address-spaces.h" @@ -130,6 +131,7 @@ static void openrisc_create_fdt(OR1KVirtState *state, void *fdt; int cpu; char *nodename; + uint8_t rng_seed[32]; fdt = state->fdt = create_device_tree(&state->fdt_size); if (!fdt) { @@ -186,6 +188,10 @@ static void openrisc_create_fdt(OR1KVirtState *state, qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline); } + /* Pass seed to RNG. */ + qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); + qemu_fdt_setprop(fdt, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed)); + /* Create aliases node for use by devices. */ qemu_fdt_add_subnode(fdt, "/aliases"); } -- 2.37.1
WARNING: multiple messages have this Message-ID (diff)
From: Stafford Horne <shorne@gmail.com> To: QEMU Development <qemu-devel@nongnu.org> Cc: Openrisc <openrisc@lists.librecores.org>, Richard Henderson <richard.henderson@linaro.org>, "Jason A. Donenfeld" <Jason@zx2c4.com>, Stafford Horne <shorne@gmail.com> Subject: [PATCH v3 10/11] hw/openrisc: virt: pass random seed to fdt Date: Sat, 30 Jul 2022 08:01:16 +0900 [thread overview] Message-ID: <20220729230117.3768312-11-shorne@gmail.com> (raw) In-Reply-To: <20220729230117.3768312-1-shorne@gmail.com> From: "Jason A. Donenfeld" <Jason@zx2c4.com> 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 is confirmed to successfully initialize the RNG on Linux 5.19-rc2. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Stafford Horne <shorne@gmail.com> --- Since v2: - No changes hw/openrisc/virt.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/openrisc/virt.c b/hw/openrisc/virt.c index 9a78234a28..f8a68a6a6b 100644 --- a/hw/openrisc/virt.c +++ b/hw/openrisc/virt.c @@ -8,6 +8,7 @@ #include "qemu/osdep.h" #include "qemu/error-report.h" +#include "qemu/guest-random.h" #include "qapi/error.h" #include "cpu.h" #include "exec/address-spaces.h" @@ -130,6 +131,7 @@ static void openrisc_create_fdt(OR1KVirtState *state, void *fdt; int cpu; char *nodename; + uint8_t rng_seed[32]; fdt = state->fdt = create_device_tree(&state->fdt_size); if (!fdt) { @@ -186,6 +188,10 @@ static void openrisc_create_fdt(OR1KVirtState *state, qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline); } + /* Pass seed to RNG. */ + qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); + qemu_fdt_setprop(fdt, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed)); + /* Create aliases node for use by devices. */ qemu_fdt_add_subnode(fdt, "/aliases"); } -- 2.37.1
next prev parent reply other threads:[~2022-07-29 23:06 UTC|newest] Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-07-29 23:01 [PATCH v3 00/11] OpenRISC Virtual Machine Stafford Horne 2022-07-29 23:01 ` Stafford Horne 2022-07-29 23:01 ` [PATCH v3 01/11] hw/openrisc: Split re-usable boot time apis out to boot.c Stafford Horne 2022-07-29 23:01 ` Stafford Horne 2022-07-29 23:01 ` [PATCH v3 02/11] target/openrisc: Fix memory reading in debugger Stafford Horne 2022-07-29 23:01 ` Stafford Horne 2022-07-29 23:01 ` [PATCH v3 03/11] goldfish_rtc: Add big-endian property Stafford Horne 2022-07-29 23:01 ` Stafford Horne 2022-07-29 23:39 ` Richard Henderson 2022-07-29 23:39 ` Richard Henderson 2022-07-29 23:01 ` [PATCH v3 04/11] hw/openrisc: Add the OpenRISC virtual machine Stafford Horne 2022-07-29 23:01 ` Stafford Horne 2022-07-29 23:01 ` [PATCH v3 05/11] hw/openrisc: Add PCI bus support to virt Stafford Horne 2022-07-29 23:01 ` Stafford Horne 2022-07-29 23:01 ` [PATCH v3 06/11] hw/openrisc: Initialize timer time at startup Stafford Horne 2022-07-29 23:01 ` Stafford Horne 2022-07-29 23:42 ` Richard Henderson 2022-07-29 23:01 ` [PATCH v3 07/11] target/openrisc: Add interrupted CPU to log Stafford Horne 2022-07-29 23:01 ` Stafford Horne 2022-07-29 23:01 ` [PATCH v3 08/11] target/openrisc: Enable MTTCG Stafford Horne 2022-07-29 23:01 ` Stafford Horne 2022-07-29 23:42 ` Richard Henderson 2022-08-02 2:03 ` Stafford Horne 2022-08-02 2:03 ` Stafford Horne 2022-07-29 23:01 ` [PATCH v3 09/11] target/openrisc: Interrupt handling fixes Stafford Horne 2022-07-29 23:01 ` Stafford Horne 2022-07-29 23:01 ` Stafford Horne [this message] 2022-07-29 23:01 ` [PATCH v3 10/11] hw/openrisc: virt: pass random seed to fdt Stafford Horne 2022-07-29 23:01 ` [PATCH v3 11/11] docs/system: openrisc: Add OpenRISC documentation Stafford Horne 2022-07-29 23:01 ` Stafford Horne
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