From: Stafford Horne <shorne@gmail.com> To: qemu-devel@nongnu.org Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>, openrisc@lists.librecores.org, Richard Henderson <richard.henderson@linaro.org> Subject: [PULL 10/11] hw/openrisc: virt: pass random seed to fdt Date: Sun, 4 Sep 2022 08:26:06 +0100 [thread overview] Message-ID: <20220904072607.44275-11-shorne@gmail.com> (raw) In-Reply-To: <20220904072607.44275-1-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> --- 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"); } -- 2.37.2
WARNING: multiple messages have this Message-ID (diff)
From: Stafford Horne <shorne@gmail.com> To: qemu-devel@nongnu.org Cc: openrisc@lists.librecores.org, "Jason A. Donenfeld" <Jason@zx2c4.com>, Richard Henderson <richard.henderson@linaro.org>, Stafford Horne <shorne@gmail.com> Subject: [PULL 10/11] hw/openrisc: virt: pass random seed to fdt Date: Sun, 4 Sep 2022 08:26:06 +0100 [thread overview] Message-ID: <20220904072607.44275-11-shorne@gmail.com> (raw) In-Reply-To: <20220904072607.44275-1-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> --- 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"); } -- 2.37.2
next prev parent reply other threads:[~2022-09-04 7:26 UTC|newest] Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-09-04 7:25 [PULL 00/11] OpenRISC updates for 7.2.0 Stafford Horne 2022-09-04 7:25 ` Stafford Horne 2022-09-04 7:25 ` [PULL 01/11] hw/openrisc: Split re-usable boot time apis out to boot.c Stafford Horne 2022-09-04 7:25 ` Stafford Horne 2022-09-04 7:25 ` [PULL 02/11] target/openrisc: Fix memory reading in debugger Stafford Horne 2022-09-04 7:25 ` Stafford Horne 2022-09-04 7:25 ` [PULL 03/11] goldfish_rtc: Add big-endian property Stafford Horne 2022-09-04 7:25 ` Stafford Horne 2022-09-04 7:26 ` [PULL 04/11] hw/openrisc: Add the OpenRISC virtual machine Stafford Horne 2022-09-04 7:26 ` Stafford Horne 2022-09-04 7:26 ` [PULL 05/11] hw/openrisc: Add PCI bus support to virt Stafford Horne 2022-09-04 7:26 ` Stafford Horne 2022-09-04 7:26 ` [PULL 06/11] hw/openrisc: Initialize timer time at startup Stafford Horne 2022-09-04 7:26 ` Stafford Horne 2022-09-04 7:26 ` [PULL 07/11] target/openrisc: Add interrupted CPU to log Stafford Horne 2022-09-04 7:26 ` Stafford Horne 2022-09-04 7:26 ` [PULL 08/11] target/openrisc: Enable MTTCG Stafford Horne 2022-09-04 7:26 ` Stafford Horne 2022-09-04 7:26 ` [PULL 09/11] target/openrisc: Interrupt handling fixes Stafford Horne 2022-09-04 7:26 ` Stafford Horne 2022-09-04 7:26 ` Stafford Horne [this message] 2022-09-04 7:26 ` [PULL 10/11] hw/openrisc: virt: pass random seed to fdt Stafford Horne 2022-09-04 7:26 ` [PULL 11/11] docs/system: openrisc: Add OpenRISC documentation Stafford Horne 2022-09-04 7:26 ` Stafford Horne 2022-09-05 23:40 ` [PULL 00/11] OpenRISC updates for 7.2.0 Stefan Hajnoczi 2022-09-05 23:40 ` Stefan Hajnoczi 2022-09-07 14:19 ` Stefan Hajnoczi 2022-09-07 14:19 ` Stefan Hajnoczi
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