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| author | Thomas Huth <thuth@linux.vnet.ibm.com> | 2015-02-06 15:54:58 +0100 |
|---|---|---|
| committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2015-04-30 13:21:42 +0200 |
| commit | a9bcd1b8719dea2e91512238d810e2a0037e174d (patch) | |
| tree | 9f4520bf1f7267b405dbf8e4b18074af306a56cd /target-s390x/mmu_helper.c | |
| parent | f07177a5599fb204e42a007db4820ceda1bc85ba (diff) | |
s390x/mmu: Use ioctl for reading and writing from/to guest memory
Add code to make use of the new ioctl for reading from / writing to
virtual guest memory. By using the ioctl, the memory accesses are now
protected with the so-called ipte-lock in the kernel.
[CH: moved error message into kvm_s390_mem_op()]
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'target-s390x/mmu_helper.c')
| -rw-r--r-- | target-s390x/mmu_helper.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/target-s390x/mmu_helper.c b/target-s390x/mmu_helper.c index 9b88498b39..cd2cb51629 100644 --- a/target-s390x/mmu_helper.c +++ b/target-s390x/mmu_helper.c @@ -450,6 +450,13 @@ int s390_cpu_virt_mem_rw(S390CPU *cpu, vaddr laddr, void *hostbuf, target_ulong *pages; int ret; + if (kvm_enabled()) { + ret = kvm_s390_mem_op(cpu, laddr, hostbuf, len, is_write); + if (ret >= 0) { + return ret; + } + } + nr_pages = (((laddr & ~TARGET_PAGE_MASK) + len - 1) >> TARGET_PAGE_BITS) + 1; pages = g_malloc(nr_pages * sizeof(*pages)); |