path: root/tools/testing/ktest/examples/include
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authorJason A. Donenfeld <Jason@zx2c4.com>2022-06-22 12:54:35 +0200
committerJason A. Donenfeld <Jason@zx2c4.com>2022-07-03 02:45:57 +0200
commitbae3a702cdd04f80c07a61e1e64cc4a29df69858 (patch)
tree22976e9b4c65090638ba13e613beec1dbaa1cbc6 /tools/testing/ktest/examples/include
parentpowerpc/powernv: rename remaining rng powernv_ functions to pnv_ (diff)
powerpc/kvm: don't crash on missing rng, and use darn
On POWER8 systems that don't have ibm,power-rng available, a guest that ignores the KVM_CAP_PPC_HWRNG flag and calls H_RANDOM anyway will dereference a NULL pointer. And on machines with darn instead of ibm,power-rng, H_RANDOM won't work at all. This patch kills two birds with one stone, by routing H_RANDOM calls to ppc_md.get_random_seed, and doing the real mode check inside of it. Cc: stable@vger.kernel.org # v4.1+ Cc: Michael Ellerman <mpe@ellerman.id.au> Tested-by: Sachin Sant <sachinp@linux.ibm.com> Fixes: e928e9cb3601 ("KVM: PPC: Book3S HV: Add fast real-mode H_RANDOM implementation.") Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'tools/testing/ktest/examples/include')
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