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| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2020-01-23 17:30:47 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-01-26 00:11:35 +1100 |
| commit | def0bfdbd6039e96a9eb2baaa4470b079daab0d4 (patch) | |
| tree | ec4077cf1931e6bd1018a3c3b5526c721b05624b /arch/powerpc/kvm/book3s_64_mmu_radix.c | |
| parent | powerpc/maple: Fix comparing pointer to 0 (diff) | |
| download | linux-dev-def0bfdbd6039e96a9eb2baaa4470b079daab0d4.tar.xz linux-dev-def0bfdbd6039e96a9eb2baaa4470b079daab0d4.zip | |
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 <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e041f5eedb23f09ab553be8a91c3de2087147320.1579800517.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_mmu_radix.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu_radix.c | 6 |
1 files changed, 2 insertions, 4 deletions
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) |