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authorChristophe Leroy <christophe.leroy@c-s.fr>2020-01-23 20:30:47 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2020-01-25 16:11:35 +0300
commitdef0bfdbd6039e96a9eb2baaa4470b079daab0d4 (patch)
treeec4077cf1931e6bd1018a3c3b5526c721b05624b /arch/powerpc/kvm/book3s_64_mmu_radix.c
parent1e3531982ee70adf1880715a968d9c3365f321ed (diff)
downloadlinux-def0bfdbd6039e96a9eb2baaa4470b079daab0d4.tar.xz
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.c6
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)