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| author | Sanjay Lal <sanjayl@kymasys.com> | 2012-11-21 18:34:03 -0800 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-05-08 03:55:35 +0200 |
| commit | 9843b030cc951bce4a4d9bec38b5155c96eb1740 (patch) | |
| tree | dd219e76dce1e1b92e6f5fc19e8767b60827c7ee /arch/mips/mti-malta | |
| parent | 669e846e6c4e13f16d7418973609931e362cb16a (diff) | |
| download | linux-9843b030cc951bce4a4d9bec38b5155c96eb1740.tar.gz | |
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/mti-malta')
| -rw-r--r-- | arch/mips/mti-malta/malta-time.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/mips/mti-malta/malta-time.c b/arch/mips/mti-malta/malta-time.c index a144b89cf9ba..bc6ac00c0d57 100644 --- a/arch/mips/mti-malta/malta-time.c +++ b/arch/mips/mti-malta/malta-time.c @@ -76,6 +76,21 @@ static void __init estimate_frequencies(void) unsigned int count, start; unsigned int giccount = 0, gicstart = 0; +#if defined (CONFIG_KVM_GUEST) && defined (CONFIG_KVM_HOST_FREQ) + unsigned int prid = read_c0_prid() & 0xffff00; + + /* + * XXXKYMA: hardwire the CPU frequency to Host Freq/4 + */ + count = (CONFIG_KVM_HOST_FREQ * 1000000) >> 3; + if ((prid != (PRID_COMP_MIPS | PRID_IMP_20KC)) && + (prid != (PRID_COMP_MIPS | PRID_IMP_25KF))) + count *= 2; + + mips_hpt_frequency = count; + return; +#endif + local_irq_save(flags); /* Start counter exactly on falling edge of update flag. */ |