diff options
| author | Sanjay Lal <sanjayl@kymasys.com> | 2012-11-22 03:34:03 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-05-08 03:55:35 +0200 |
| commit | 9843b030cc951bce4a4d9bec38b5155c96eb1740 (patch) | |
| tree | dd219e76dce1e1b92e6f5fc19e8767b60827c7ee /arch/mips/kernel | |
| parent | KVM/MIPS32: MIPS arch specific APIs for KVM (diff) | |
| download | linux-9843b030cc951bce4a4d9bec38b5155c96eb1740.tar.xz linux-9843b030cc951bce4a4d9bec38b5155c96eb1740.zip | |
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')
| -rw-r--r-- | arch/mips/kernel/binfmt_elfo32.c | 4 | ||||
| -rw-r--r-- | arch/mips/kernel/cevt-r4k.c | 4 | ||||
| -rw-r--r-- | arch/mips/kernel/traps.c | 7 |
3 files changed, 14 insertions, 1 deletions
diff --git a/arch/mips/kernel/binfmt_elfo32.c b/arch/mips/kernel/binfmt_elfo32.c index 556a4357d7fc..97c5a1668e53 100644 --- a/arch/mips/kernel/binfmt_elfo32.c +++ b/arch/mips/kernel/binfmt_elfo32.c @@ -48,7 +48,11 @@ typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; __res; \ }) +#ifdef CONFIG_KVM_GUEST +#define TASK32_SIZE 0x3fff8000UL +#else #define TASK32_SIZE 0x7fff8000UL +#endif #undef ELF_ET_DYN_BASE #define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2) diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c index 07b847d77f5d..fd75d7144524 100644 --- a/arch/mips/kernel/cevt-r4k.c +++ b/arch/mips/kernel/cevt-r4k.c @@ -118,6 +118,10 @@ int c0_compare_int_usable(void) unsigned int delta; unsigned int cnt; +#ifdef CONFIG_KVM_GUEST + return 1; +#endif + /* * IP7 already pending? Try to clear it by acking the timer. */ 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); } |