pm24.git/include/linux/kvm_types.h, branch v4.12

kvm: rename pfn_t to kvm_pfn_t

2016-01-16T01:56:32Z

To date, we have implemented two I/O usage models for persistent memory, PMEM (a persistent "ram disk") and DAX (mmap persistent memory into userspace). This series adds a third, DAX-GUP, that allows DAX mappings to be the target of direct-i/o. It allows userspace to coordinate DMA/RDMA from/to persistent memory. The implementation leverages the ZONE_DEVICE mm-zone that went into 4.3-rc1 (also discussed at kernel summit) to flag pages that are owned and dynamically mapped by a device driver. The pmem driver, after mapping a persistent memory range into the system memmap via devm_memremap_pages(), arranges for DAX to distinguish pfn-only versus page-backed pmem-pfns via flags in the new pfn_t type. The DAX code, upon seeing a PFN_DEV+PFN_MAP flagged pfn, flags the resulting pte(s) inserted into the process page tables with a new _PAGE_DEVMAP flag. Later, when get_user_pages() is walking ptes it keys off _PAGE_DEVMAP to pin the device hosting the page range active. Finally, get_page() and put_page() are modified to take references against the device driver established page mapping. Finally, this need for "struct page" for persistent memory requires memory capacity to store the memmap array. Given the memmap array for a large pool of persistent may exhaust available DRAM introduce a mechanism to allocate the memmap from persistent memory. The new "struct vmem_altmap *" parameter to devm_memremap_pages() enables arch_add_memory() to use reserved pmem capacity rather than the page allocator. This patch (of 18): The core has developed a need for a "pfn_t" type [1]. Move the existing pfn_t in KVM to kvm_pfn_t [2]. [1]: https://lists.01.org/pipermail/linux-nvdimm/2015-September/002199.html [2]: https://lists.01.org/pipermail/linux-nvdimm/2015-September/002218.html Signed-off-by: Dan Williams Acked-by: Christoffer Dall Cc: Paolo Bonzini Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

KVM: add memslots argument to kvm_arch_memslots_updated

2015-05-26T10:40:17Z

Prepare for the case of multiple address spaces. Reviewed-by: Radim Krcmar Signed-off-by: Paolo Bonzini

KVM: move APIC types to arch/x86/

2014-12-18T08:39:51Z

They are not used anymore by IA64, move them away. Signed-off-by: Paolo Bonzini

KVM: forward declare structs in kvm_types.h

2014-08-29T14:35:53Z

Opaque KVM structs are useful for prototypes in asm/kvm_host.h, to avoid "'struct foo' declared inside parameter list" warnings (and consequent breakage due to conflicting types). Move them from individual files to a generic place in linux/kvm_types.h. Signed-off-by: Paolo Bonzini

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

2013-04-07T10:05:35Z

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

KVM: Add memory slot versioning and use it to provide fast guest write interface

2011-01-12T09:23:08Z

Keep track of memslots changes by keeping generation number in memslots structure. Provide kvm_write_guest_cached() function that skips gfn_to_hva() translation if memslots was not changed since previous invocation. Acked-by: Rik van Riel Signed-off-by: Gleb Natapov Signed-off-by: Marcelo Tosatti

KVM: Use u64 for frame data types

2010-08-02T03:39:44Z

For 32bit machines where the physical address width is larger than the virtual address width the frame number types in KVM may overflow. Fix this by changing them to u64. [sfr: fix build on 32-bit ppc] Signed-off-by: Joerg Roedel Signed-off-by: Stephen Rothwell Signed-off-by: Marcelo Tosatti

KVM: APIC: get rid of deliver_bitmask

2009-06-10T08:48:27Z

Deliver interrupt during destination matching loop. Signed-off-by: Gleb Natapov Acked-by: Xiantao Zhang Signed-off-by: Marcelo Tosatti

KVM: Split IOAPIC structure

2009-06-10T08:48:21Z

Prepared for reuse ioapic_redir_entry for MSI. Signed-off-by: Sheng Yang Signed-off-by: Avi Kivity

KVM: Move struct kvm_pio_request into x86 kvm_host.h

2009-03-24T09:02:55Z

This is an x86 specific stucture and has no business living in common code. Signed-off-by: Avi Kivity