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authorSanjay Lal <sanjayl@kymasys.com>2012-11-21 18:34:03 -0800
committerRalf Baechle <ralf@linux-mips.org>2013-05-08 03:55:35 +0200
commit9843b030cc951bce4a4d9bec38b5155c96eb1740 (patch)
treedd219e76dce1e1b92e6f5fc19e8767b60827c7ee /arch/mips/kernel/traps.c
parent669e846e6c4e13f16d7418973609931e362cb16a (diff)
KVM/MIPS32: KVM Guest kernel support.
Both Guest kernel and Guest Userspace execute in UM. The memory map is as follows: Guest User address space: 0x00000000 -> 0x40000000 Guest Kernel Unmapped: 0x40000000 -> 0x60000000 Guest Kernel Mapped: 0x60000000 -> 0x80000000 - Guest Usermode virtual memory is limited to 1GB. Signed-off-by: Sanjay Lal <sanjayl@kymasys.com> Cc: kvm@vger.kernel.org Cc: linux-mips@linux-mips.org Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/traps.c')
-rw-r--r--arch/mips/kernel/traps.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index a200b5bdbb87..59351e5d0591 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1713,7 +1713,12 @@ void __init trap_init(void)
ebase = (unsigned long)
__alloc_bootmem(size, 1 << fls(size), 0);
} else {
- ebase = CKSEG0;
+#ifdef CONFIG_KVM_GUEST
+#define KVM_GUEST_KSEG0 0x40000000
+ ebase = KVM_GUEST_KSEG0;
+#else
+ ebase = CKSEG0;
+#endif
if (cpu_has_mips_r2)
ebase += (read_c0_ebase() & 0x3ffff000);
}