1 files changed, 30 insertions, 0 deletions

diff --git a/patches/boot_time_opt/0118-give-rdrand-some-credit.patch b/patches/boot_time_opt/0118-give-rdrand-some-credit.patch
new file mode 100644
index 0000000..a7abd53
--- /dev/null
+++ b/patches/boot_time_opt/0118-give-rdrand-some-credit.patch
@@ -0,0 +1,30 @@
+From 7b90a7bba60360a4585cf317b092e266e6a81e76 Mon Sep 17 00:00:00 2001
+From: Arjan van de Ven <arjan@linux.intel.com>
+Date: Fri, 29 Jul 2016 19:10:52 +0000
+Subject: [PATCH 118/126] give rdrand some credit
+
+try to credit rdrand/rdseed with some entropy
+
+In VMs but even modern hardware, we're super starved for entropy, and while we can
+and do wear a tin foil hat, it's very hard to argue that
+rdrand and rdtsc add zero entropy.
+---
+ drivers/char/random.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/drivers/char/random.c b/drivers/char/random.c
+index 8ad92707e45f..1729d2e733e5 100644
+--- a/drivers/char/random.c
++++ b/drivers/char/random.c
+@@ -1666,6 +1666,8 @@ static void init_std_data(struct entropy_store *r)
+                if (!arch_get_random_seed_long(&rv) &&
+                    !arch_get_random_long(&rv))
+                        rv = random_get_entropy();
++               else
++                       credit_entropy_bits(r, 1);
+                mix_pool_bytes(r, &rv, sizeof(rv));
+        }
+        mix_pool_bytes(r, utsname(), sizeof(*(utsname())));
+-- 
+2.15.0
+