From def0bfdbd6039e96a9eb2baaa4470b079daab0d4 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Thu, 23 Jan 2020 17:30:47 +0000 Subject: powerpc: use probe_user_read() and probe_user_write() Instead of opencoding, use probe_user_read() to failessly read a user location and probe_user_write() for writing to user. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/e041f5eedb23f09ab553be8a91c3de2087147320.1579800517.git.christophe.leroy@c-s.fr --- arch/powerpc/kvm/book3s_64_mmu_radix.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'arch/powerpc/kvm/book3s_64_mmu_radix.c') diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c index da857c8ba6e4..231410dc9db4 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_radix.c +++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c @@ -63,12 +63,10 @@ unsigned long __kvmhv_copy_tofrom_guest_radix(int lpid, int pid, } isync(); - pagefault_disable(); if (is_load) - ret = raw_copy_from_user(to, from, n); + ret = probe_user_read(to, (const void __user *)from, n); else - ret = raw_copy_to_user(to, from, n); - pagefault_enable(); + ret = probe_user_write((void __user *)to, from, n); /* switch the pid first to avoid running host with unallocated pid */ if (quadrant == 1 && pid != old_pid) -- cgit