From 4cb88c3c378ae8c86c0ba53619caf6924f72239c Mon Sep 17 00:00:00 2001 From: Dominik Dingel Date: Fri, 11 Apr 2014 13:47:40 +0200 Subject: s390x/kvm: enable/reset cmma via vm attributes Exploit the new api for userspace-controlled cmma. If supported, enable cmma during kvm initialization and register a reset handler for cmma, which is also called directly from the load IPL code. The reset functionality is needed to reset the cmma state of the guest pages, e.g. if a system reset is triggered via qemu monitor; otherwise this could result in data corruption. A guest triggered reboot may now lead to multiple cmma resets; this is OK, however, as this is slowpath anyway and the simplest way to achieve the intended effects. Signed-off-by: Dominik Dingel Acked-by: Christian Borntraeger Acked-by: Cornelia Huck Signed-off-by: Cornelia Huck --- trace-events | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'trace-events') diff --git a/trace-events b/trace-events index ffe6e62..e984e76 100644 --- a/trace-events +++ b/trace-events @@ -1258,3 +1258,7 @@ xen_pv_mmio_write(uint64_t addr) "WARNING: write to Xen PV Device MMIO space (ad # hw/pci/pci_host.c pci_cfg_read(const char *dev, unsigned devid, unsigned fnid, unsigned offs, unsigned val) "%s %02u:%u @0x%x -> 0x%x" pci_cfg_write(const char *dev, unsigned devid, unsigned fnid, unsigned offs, unsigned val) "%s %02u:%u @0x%x <- 0x%x" + +# target-s390x/kvm.c +kvm_enable_cmma(int rc) "CMMA: enabling with result code %d" +kvm_clear_cmma(int rc) "CMMA: clearing with result code %d" -- cgit v1.1