From: Heiko Carstens hca@linux.ibm.com
[ Upstream commit 402ff5a3387dc8ec6987a80d3ce26b0c25773622 ]
Add missing __pa/__va address conversion of machine check extended save area designation, which is an absolute address.
Note: this currently doesn't fix a real bug, since virtual addresses are indentical to physical ones.
Reported-by: Vineeth Vijayan vneethv@linux.ibm.com Tested-by: Vineeth Vijayan vneethv@linux.ibm.com Signed-off-by: Heiko Carstens hca@linux.ibm.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/s390/kernel/machine_kexec.c | 2 +- arch/s390/kernel/nmi.c | 10 +++++----- arch/s390/kernel/smp.c | 2 +- 3 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c index 0505e55a62979..a16467b3825ec 100644 --- a/arch/s390/kernel/machine_kexec.c +++ b/arch/s390/kernel/machine_kexec.c @@ -86,7 +86,7 @@ static noinline void __machine_kdump(void *image) continue; } /* Store status of the boot CPU */ - mcesa = (struct mcesa *)(S390_lowcore.mcesad & MCESA_ORIGIN_MASK); + mcesa = __va(S390_lowcore.mcesad & MCESA_ORIGIN_MASK); if (MACHINE_HAS_VX) save_vx_regs((__vector128 *) mcesa->vector_save_area); if (MACHINE_HAS_GS) { diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c index 20f8e1868853f..3f18c1412eba3 100644 --- a/arch/s390/kernel/nmi.c +++ b/arch/s390/kernel/nmi.c @@ -68,7 +68,7 @@ void __init nmi_alloc_boot_cpu(struct lowcore *lc) { if (!nmi_needs_mcesa()) return; - lc->mcesad = (unsigned long) &boot_mcesa; + lc->mcesad = __pa(&boot_mcesa); if (MACHINE_HAS_GS) lc->mcesad |= ilog2(MCESA_MAX_SIZE); } @@ -94,7 +94,7 @@ static int __init nmi_init(void) __ctl_store(cr0, 0, 0); __ctl_clear_bit(0, 28); /* disable lowcore protection */ /* Replace boot_mcesa on the boot CPU */ - S390_lowcore.mcesad = origin | mcesa_origin_lc; + S390_lowcore.mcesad = __pa(origin) | mcesa_origin_lc; __ctl_load(cr0, 0, 0); return 0; } @@ -111,7 +111,7 @@ int nmi_alloc_per_cpu(struct lowcore *lc) return -ENOMEM; /* The pointer is stored with mcesa_bits ORed in */ kmemleak_not_leak((void *) origin); - lc->mcesad = origin | mcesa_origin_lc; + lc->mcesad = __pa(origin) | mcesa_origin_lc; return 0; }
@@ -119,7 +119,7 @@ void nmi_free_per_cpu(struct lowcore *lc) { if (!nmi_needs_mcesa()) return; - kmem_cache_free(mcesa_cache, (void *)(lc->mcesad & MCESA_ORIGIN_MASK)); + kmem_cache_free(mcesa_cache, __va(lc->mcesad & MCESA_ORIGIN_MASK)); }
static notrace void s390_handle_damage(void) @@ -246,7 +246,7 @@ static int notrace s390_validate_registers(union mci mci, int umode) : "Q" (S390_lowcore.fpt_creg_save_area)); }
- mcesa = (struct mcesa *)(S390_lowcore.mcesad & MCESA_ORIGIN_MASK); + mcesa = __va(S390_lowcore.mcesad & MCESA_ORIGIN_MASK); if (!MACHINE_HAS_VX) { /* Validate floating point registers */ asm volatile( diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 78a8ea6fd582a..2e280e812dfd1 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -622,7 +622,7 @@ int smp_store_status(int cpu) return -EIO; if (!MACHINE_HAS_VX && !MACHINE_HAS_GS) return 0; - pa = __pa(lc->mcesad & MCESA_ORIGIN_MASK); + pa = lc->mcesad & MCESA_ORIGIN_MASK; if (MACHINE_HAS_GS) pa |= lc->mcesad & MCESA_LC_MASK; if (__pcpu_sigp_relax(pcpu->address, SIGP_STORE_ADDITIONAL_STATUS,