Patchwork [08/10] Add RAM -> physical addr mapping in MCE simulation

login
register
mail settings
Submitter Marcelo Tosatti
Date Oct. 19, 2010, 10:40 a.m.
Message ID <df53c47db3be0f6c2d81c1b9f390439193b4cd7d.1287484836.git.mtosatti@redhat.com>
Download mbox | patch
Permalink /patch/68321/
State New
Headers show

Comments

Marcelo Tosatti - Oct. 19, 2010, 10:40 a.m.
From: Huang Ying <ying.huang@intel.com>

In QEMU-KVM, physical address != RAM address. While MCE simulation
needs physical address instead of RAM address. So
kvm_physical_memory_addr_from_ram() is implemented to do the
conversion, and it is invoked before being filled in the IA32_MCi_ADDR
MSR.

Reported-by: Dean Nelson <dnelson@redhat.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
---
 kvm-all.c |   18 ++++++++++++++++++
 kvm.h     |    3 +++
 2 files changed, 21 insertions(+), 0 deletions(-)

Patch

diff --git a/kvm-all.c b/kvm-all.c
index 1cc696f..37b99c7 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -137,6 +137,24 @@  static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s,
     return found;
 }
 
+int kvm_physical_memory_addr_from_ram(KVMState *s, ram_addr_t ram_addr,
+                                      target_phys_addr_t *phys_addr)
+{
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
+        KVMSlot *mem = &s->slots[i];
+
+        if (ram_addr >= mem->phys_offset &&
+            ram_addr < mem->phys_offset + mem->memory_size) {
+            *phys_addr = mem->start_addr + (ram_addr - mem->phys_offset);
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
 static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot)
 {
     struct kvm_userspace_memory_region mem;
diff --git a/kvm.h b/kvm.h
index 50b6c01..8f5a754 100644
--- a/kvm.h
+++ b/kvm.h
@@ -174,6 +174,9 @@  static inline void cpu_synchronize_post_init(CPUState *env)
     }
 }
 
+int kvm_physical_memory_addr_from_ram(KVMState *s, ram_addr_t ram_addr,
+                                      target_phys_addr_t *phys_addr);
+
 #endif
 int kvm_set_ioeventfd_mmio_long(int fd, uint32_t adr, uint32_t val, bool assign);