From 9843b030cc951bce4a4d9bec38b5155c96eb1740 Mon Sep 17 00:00:00 2001 From: Sanjay Lal Date: Wed, 21 Nov 2012 18:34:03 -0800 Subject: 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 Cc: kvm@vger.kernel.org Cc: linux-mips@linux-mips.org Signed-off-by: Ralf Baechle --- arch/mips/mti-malta/malta-time.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'arch/mips/mti-malta') 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. */ -- cgit v1.2.3