[Qemu-devel] [PATCH 06/12] KVM/MIPS: Define APIs to convert Guest KSEG0 <-> Guest Physical addresses.

[Sanjay Lal]

In trap and emulate mode both the guest kernel and guest userspace execute in 
UM:
    Guest User address space:   0x00000000 -> 0x40000000
    Guest Kernel Unmapped:      0x40000000 -> 0x60000000
    Guest Kernel Mapped:        0x60000000 -> 0x80000000
---
 hw/mips_addr.c    | 14 ++++++++++++++
 hw/mips_cpudevs.h |  4 ++++
 2 files changed, 18 insertions(+)

diff --git a/hw/mips_addr.c b/hw/mips_addr.c
index aa1c7d8..c24d2d9 100644
--- a/hw/mips_addr.c
+++ b/hw/mips_addr.c
@@ -22,13 +22,27 @@
 
 #include "hw.h"
 #include "mips_cpudevs.h"
+#include "sysemu/kvm.h"
+
 
 uint64_t cpu_mips_kseg0_to_phys(void *opaque, uint64_t addr)
 {
     return addr & 0x7fffffffll;
 }
 
+
+uint64_t cpu_mips_kvm_um_kseg0_to_phys(void *opaque, uint64_t addr)
+{
+    return addr & 0x3fffffffll;
+}
+
 uint64_t cpu_mips_phys_to_kseg0(void *opaque, uint64_t addr)
 {
     return addr | ~0x7fffffffll;
 }
+
+
+uint64_t cpu_mips_kvm_um_phys_to_kseg0(void *opaque, uint64_t addr)
+{
+    return addr | 0x40000000ll;
+}
diff --git a/hw/mips_cpudevs.h b/hw/mips_cpudevs.h
index 6bea24b..9e5af37 100644
--- a/hw/mips_cpudevs.h
+++ b/hw/mips_cpudevs.h
@@ -6,6 +6,10 @@
 uint64_t cpu_mips_kseg0_to_phys(void *opaque, uint64_t addr);
 uint64_t cpu_mips_phys_to_kseg0(void *opaque, uint64_t addr);
 
+uint64_t cpu_mips_kvm_um_kseg0_to_phys(void *opaque, uint64_t addr);
+uint64_t cpu_mips_kvm_um_phys_to_kseg0(void *opaque, uint64_t addr);
+
+
 /* mips_int.c */
 void cpu_mips_irq_init_cpu(CPUMIPSState *env);
 
-- 
1.7.11.3