Merge remote-tracking branch 'remotes/bonzini-gitlab/tags/for-upstream' into staging

* fix tracing vs -daemonize (Daniel)
* detect invalid CFI configuration (Daniele)
* 32-bit PVH fix (David)
* forward SCSI passthrough host-status to the SCSI HBA (Hannes)
* detect ill-formed id in QMP object-add (Kevin)
* miscellaneous bugfixes and cleanups (Keqian, Kostiantyn, myself, Peng Liang)
* add nodelay option for chardev (myself)
* deprecate -M kernel-irqchip=off on x86 (myself)
* keep .d files (myself)
* Fix -trace file (myself)

# gpg: Signature made Sat 06 Mar 2021 10:43:12 GMT
# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini-gitlab/tags/for-upstream: (23 commits)
  meson: Stop if cfi is enabled with system slirp
  trace: skip qemu_set_log_filename if no "-D" option was passed
  trace: fix "-trace file=..."
  meson: adjust timeouts for some slower tests
  build-sys: invoke ninja with -d keepdepfile
  qemu-option: do not suggest using the delay option
  scsi: move host_status handling into SCSI drivers
  scsi: inline sg_io_sense_from_errno() into the callers.
  scsi-generic: do not snoop the output of failed commands
  scsi: Add mapping for generic SCSI_HOST status to sense codes
  scsi: Rename linux-specific SG_ERR codes to generic SCSI_HOST error codes
  qemu-config: add error propagation to qemu_config_parse
  x86/pvh: extract only 4 bytes of start address for 32 bit kernels
  elf_ops: correct loading of 32 bit PVH kernel
  lsilogic: Use PCIDevice::exit instead of DeviceState::unrealize
  accel: kvm: Add aligment assert for kvm_log_clear_one_slot
  accel: kvm: Fix memory waste under mismatch page size
  vl.c: do not execute trace_init_backends() before daemonizing
  qom: Check for wellformed id in user_creatable_add_type()
  chardev: add nodelay option
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 12 insertions, 1 deletions

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 84c943f..f88a523 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -598,8 +598,12 @@ static void kvm_memslot_init_dirty_bitmap(KVMSlot *mem)
      * too, in most cases).
      * So for now, let's align to 64 instead of HOST_LONG_BITS here, in
      * a hope that sizeof(long) won't become >8 any time soon.
+     *
+     * Note: the granule of kvm dirty log is qemu_real_host_page_size.
+     * And mem->memory_size is aligned to it (otherwise this mem can't
+     * be registered to KVM).
      */
-    hwaddr bitmap_size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS),
+    hwaddr bitmap_size = ALIGN(mem->memory_size / qemu_real_host_page_size,
                                         /*HOST_LONG_BITS*/ 64) / 8;
     mem->dirty_bmap = g_malloc0(bitmap_size);
 }
@@ -669,6 +673,10 @@ out:
 #define KVM_CLEAR_LOG_ALIGN  (qemu_real_host_page_size << KVM_CLEAR_LOG_SHIFT)
 #define KVM_CLEAR_LOG_MASK   (-KVM_CLEAR_LOG_ALIGN)
 
+/*
+ * As the granule of kvm dirty log is qemu_real_host_page_size,
+ * @start and @size are expected and restricted to align to it.
+ */
 static int kvm_log_clear_one_slot(KVMSlot *mem, int as_id, uint64_t start,
                                   uint64_t size)
 {
@@ -678,6 +686,9 @@ static int kvm_log_clear_one_slot(KVMSlot *mem, int as_id, uint64_t start,
     unsigned long *bmap_clear = NULL, psize = qemu_real_host_page_size;
     int ret;
 
+    /* Make sure start and size are qemu_real_host_page_size aligned */
+    assert(QEMU_IS_ALIGNED(start | size, psize));
+
     /*
      * We need to extend either the start or the size or both to
      * satisfy the KVM interface requirement.  Firstly, do the start