diff options
| author | Ingo Molnar <mingo@kernel.org> | 2020-10-09 08:55:17 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-10-09 08:55:17 +0200 |
| commit | e705d397965811ac528d7213b42d74ffe43caf38 (patch) | |
| tree | 8a5bbe85cc42e64992b97859976e307027f83e33 /arch/s390/mm | |
| parent | d89d5f855f84ccf3f7e648813b4bb95c780bd7cd (diff) | |
| parent | baffd723e44dc3d7f84f0b8f1fe1ece00ddd2710 (diff) | |
| download | linux-e705d397965811ac528d7213b42d74ffe43caf38.tar.bz2 | |
Merge branch 'locking/urgent' into locking/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/s390/mm')
| -rw-r--r-- | arch/s390/mm/fault.c | 20 | ||||
| -rw-r--r-- | arch/s390/mm/vmem.c | 1 |
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index 4c8c063bce5b..996884dcc9fd 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -859,6 +859,21 @@ void do_non_secure_storage_access(struct pt_regs *regs) } NOKPROBE_SYMBOL(do_non_secure_storage_access); +void do_secure_storage_violation(struct pt_regs *regs) +{ + /* + * Either KVM messed up the secure guest mapping or the same + * page is mapped into multiple secure guests. + * + * This exception is only triggered when a guest 2 is running + * and can therefore never occur in kernel context. + */ + printk_ratelimited(KERN_WARNING + "Secure storage violation in task: %s, pid %d\n", + current->comm, current->pid); + send_sig(SIGSEGV, current, 0); +} + #else void do_secure_storage_access(struct pt_regs *regs) { @@ -869,4 +884,9 @@ void do_non_secure_storage_access(struct pt_regs *regs) { default_trap_handler(regs); } + +void do_secure_storage_violation(struct pt_regs *regs) +{ + default_trap_handler(regs); +} #endif diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index 1aed1a4dfc2d..eddf71c22875 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -402,6 +402,7 @@ static int modify_p4d_table(pgd_t *pgd, unsigned long addr, unsigned long end, pud = vmem_crst_alloc(_REGION3_ENTRY_EMPTY); if (!pud) goto out; + p4d_populate(&init_mm, p4d, pud); } ret = modify_pud_table(p4d, addr, next, add, direct); if (ret) |