kernel.git/virt/kvm/kvm_main.c, branch linux-3.8.y

KVM: Allow cross page reads and writes from cached translations.

2013-04-25T19:51:11Z

commit 8f964525a121f2ff2df948dac908dcc65be21b5b upstream. This patch adds support for kvm_gfn_to_hva_cache_init functions for reads and writes that will cross a page. If the range falls within the same memslot, then this will be a fast operation. If the range is split between two memslots, then the slower kvm_read_guest and kvm_write_guest are used. Tested: Test against kvm_clock unit tests. Signed-off-by: Andrew Honig Signed-off-by: Gleb Natapov Cc: Ben Hutchings Signed-off-by: Greg Kroah-Hartman

KVM: Fix user memslot overlap check

2012-11-30T01:30:32Z

Prior to memory slot sorting this loop compared all of the user memory slots for overlap with new entries. With memory slot sorting, we're just checking some number of entries in the array that may or may not be user slots. Instead, walk all the slots with kvm_for_each_memslot, which has the added benefit of terminating early when we hit the first empty slot, and skip comparison to private slots. Cc: stable@vger.kernel.org Signed-off-by: Alex Williamson Signed-off-by: Marcelo Tosatti

KVM: x86: add kvm_arch_vcpu_postcreate callback, move TSC initialization

2012-11-28T01:29:14Z

TSC initialization will soon make use of online_vcpus. Signed-off-by: Marcelo Tosatti

KVM: x86: implement PVCLOCK_TSC_STABLE_BIT pvclock flag

2012-11-28T01:29:13Z

KVM added a global variable to guarantee monotonicity in the guest. One of the reasons for that is that the time between 1. ktime_get_ts(×pec); 2. rdtscll(tsc); Is variable. That is, given a host with stable TSC, suppose that two VCPUs read the same time via ktime_get_ts() above. The time required to execute 2. is not the same on those two instances executing in different VCPUS (cache misses, interrupts...). If the TSC value that is used by the host to interpolate when calculating the monotonic time is the same value used to calculate the tsc_timestamp value stored in the pvclock data structure, and a single tuple is visible to all vcpus simultaneously, this problem disappears. See comment on top of pvclock_update_vm_gtod_copy for details. Monotonicity is then guaranteed by synchronicity of the host TSCs and guest TSCs. Set TSC stable pvclock flag in that case, allowing the guest to read clock from userspace. Signed-off-by: Marcelo Tosatti

KVM: remove unnecessary return value check

2012-11-14T00:14:29Z

No need to check return value before breaking switch. Signed-off-by: Guo Chao Signed-off-by: Marcelo Tosatti

KVM: do not kfree error pointer

2012-11-14T00:14:28Z

We should avoid kfree()ing error pointer in kvm_vcpu_ioctl() and kvm_arch_vcpu_ioctl(). Signed-off-by: Guo Chao Signed-off-by: Marcelo Tosatti

KVM: do not treat noslot pfn as a error pfn

2012-10-29T22:31:04Z

This patch filters noslot pfn out from error pfns based on Marcelo comment: noslot pfn is not a error pfn After this patch, - is_noslot_pfn indicates that the gfn is not in slot - is_error_pfn indicates that the gfn is in slot but the error is occurred when translate the gfn to pfn - is_error_noslot_pfn indicates that the pfn either it is error pfns or it is noslot pfn And is_invalid_pfn can be removed, it makes the code more clean Signed-off-by: Xiao Guangrong Signed-off-by: Marcelo Tosatti

Merge tag 'kvm-3.7-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2012-10-24T01:08:42Z

Pull kvm fixes from Avi Kivity: "KVM updates for 3.7-rc2" * tag 'kvm-3.7-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM guest: exit idleness when handling KVM_PV_REASON_PAGE_NOT_PRESENT KVM: apic: fix LDR calculation in x2apic mode KVM: MMU: fix release noslot pfn

KVM: MMU: fix release noslot pfn

2012-10-22T16:03:25Z

We can not directly call kvm_release_pfn_clean to release the pfn since we can meet noslot pfn which is used to cache mmio info into spte Signed-off-by: Xiao Guangrong Cc: stable@vger.kernel.org Signed-off-by: Avi Kivity

kvm: replace test_and_set_bit_le() in mark_page_dirty_in_slot() with set_bit_le()

2012-10-05T18:04:56Z

Now that we have defined generic set_bit_le() we do not need to use test_and_set_bit_le() for atomically setting a bit. Signed-off-by: Takuya Yoshikawa Cc: Avi Kivity Cc: Marcelo Tosatti Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds