linux/Documentation/virtual, branch v3.8

KVM: PPC: booke: Get/set guest EPCR register using ONE_REG interface

2012-12-06T00:34:20Z

Implement ONE_REG interface for EPCR register adding KVM_REG_PPC_EPCR to the list of ONE_REG PPC supported registers. Signed-off-by: Mihai Caraman [agraf: remove HV dependency, use get/put_user] Signed-off-by: Alexander Graf

KVM: PPC: Book3S HV: Provide a method for userspace to read and write the HPT

2012-12-06T00:33:57Z

A new ioctl, KVM_PPC_GET_HTAB_FD, returns a file descriptor. Reads on this fd return the contents of the HPT (hashed page table), writes create and/or remove entries in the HPT. There is a new capability, KVM_CAP_PPC_HTAB_FD, to indicate the presence of the ioctl. The ioctl takes an argument structure with the index of the first HPT entry to read out and a set of flags. The flags indicate whether the user is intending to read or write the HPT, and whether to return all entries or only the "bolted" entries (those with the bolted bit, 0x10, set in the first doubleword). This is intended for use in implementing qemu's savevm/loadvm and for live migration. Therefore, on reads, the first pass returns information about all HPTEs (or all bolted HPTEs). When the first pass reaches the end of the HPT, it returns from the read. Subsequent reads only return information about HPTEs that have changed since they were last read. A read that finds no changed HPTEs in the HPT following where the last read finished will return 0 bytes. The format of the data provides a simple run-length compression of the invalid entries. Each block of data starts with a header that indicates the index (position in the HPT, which is just an array), the number of valid entries starting at that index (may be zero), and the number of invalid entries following those valid entries. The valid entries, 16 bytes each, follow the header. The invalid entries are not explicitly represented. Signed-off-by: Paul Mackerras [agraf: fix documentation] Signed-off-by: Alexander Graf

Merge commit 'origin/queue' into for-queue

2012-10-31T12:36:18Z

Conflicts: arch/powerpc/include/asm/Kbuild arch/powerpc/include/uapi/asm/Kbuild

KVM: Documentation: Fix reentry-to-be-consistent paragraph

2012-10-30T09:54:50Z

All user space offloaded instruction emulation needs to reenter kvm to produce consistent state again. Fix the section in the documentation to mention all of them. Signed-off-by: Alexander Graf

Merge remote-tracking branch 'master' into queue

2012-10-29T21:15:32Z

Merge reason: development work has dependency on kvm patches merged upstream. Conflicts: arch/powerpc/include/asm/Kbuild arch/powerpc/include/asm/kvm_para.h Signed-off-by: Marcelo Tosatti

Merge branch 'for-upstream' of http://github.com/agraf/linux-2.6 into queue

2012-10-10T22:03:54Z

* 'for-upstream' of http://github.com/agraf/linux-2.6: (56 commits) arch/powerpc/kvm/e500_tlb.c: fix error return code KVM: PPC: Book3S HV: Provide a way for userspace to get/set per-vCPU areas KVM: PPC: Book3S: Get/set guest FP regs using the GET/SET_ONE_REG interface KVM: PPC: Book3S: Get/set guest SPRs using the GET/SET_ONE_REG interface KVM: PPC: set IN_GUEST_MODE before checking requests KVM: PPC: e500: MMU API: fix leak of shared_tlb_pages KVM: PPC: e500: fix allocation size error on g2h_tlb1_map KVM: PPC: Book3S HV: Fix calculation of guest phys address for MMIO emulation KVM: PPC: Book3S HV: Remove bogus update of physical thread IDs KVM: PPC: Book3S HV: Fix updates of vcpu->cpu KVM: Move some PPC ioctl definitions to the correct place KVM: PPC: Book3S HV: Handle memory slot deletion and modification correctly KVM: PPC: Move kvm->arch.slot_phys into memslot.arch KVM: PPC: Book3S HV: Take the SRCU read lock before looking up memslots KVM: PPC: bookehv: Allow duplicate calls of DO_KVM macro KVM: PPC: BookE: Support FPU on non-hv systems KVM: PPC: 440: Implement mfdcrx KVM: PPC: 440: Implement mtdcrx Document IACx/DACx registers access using ONE_REG API KVM: PPC: E500: Remove E500_TLB_DIRTY flag ...

s390/kvm: Add documentation for KVM_S390_INTERRUPT

2012-10-10T22:03:38Z

Signed-off-by: Cornelia Huck Signed-off-by: Martin Schwidefsky Signed-off-by: Christian Borntraeger Signed-off-by: Marcelo Tosatti

Merge branch 'for-linus-37rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

2012-10-10T02:15:20Z

Pull UML changes from Richard Weinberger: "UML receives this time only cleanups. The most outstanding change is the 'include "foo.h"' do 'include ' conversion done by Al Viro. It touches many files, that's why the diffstat is rather big." * 'for-linus-37rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: typo in UserModeLinux-HOWTO hppfs: fix the return value of get_inode() hostfs: drop vmtruncate um: get rid of pointless include "..." where include <...> will do um: move sysrq.h out of include/shared um/x86: merge 32 and 64 bit variants of ptrace.h um/x86: merge 32 and 64bit variants of checksum.h

typo in UserModeLinux-HOWTO

2012-10-09T20:35:24Z

[it seems that I sent it to the wrong maintainer at first... sorry for that] copy_from_user was meant instead of copy_to_user. Signed-off-by: Richard Genoud Signed-off-by: Richard Weinberger

KVM: PPC: Book3S HV: Provide a way for userspace to get/set per-vCPU areas

2012-10-05T21:38:55Z

The PAPR paravirtualization interface lets guests register three different types of per-vCPU buffer areas in its memory for communication with the hypervisor. These are called virtual processor areas (VPAs). Currently the hypercalls to register and unregister VPAs are handled by KVM in the kernel, and userspace has no way to know about or save and restore these registrations across a migration. This adds "register" codes for these three areas that userspace can use with the KVM_GET/SET_ONE_REG ioctls to see what addresses have been registered, and to register or unregister them. This will be needed for guest hibernation and migration, and is also needed so that userspace can unregister them on reset (otherwise we corrupt guest memory after reboot by writing to the VPAs registered by the previous kernel). The "register" for the VPA is a 64-bit value containing the address, since the length of the VPA is fixed. The "registers" for the SLB shadow buffer and dispatch trace log (DTL) are 128 bits long, consisting of the guest physical address in the high (first) 64 bits and the length in the low 64 bits. This also fixes a bug where we were calling init_vpa unconditionally, leading to an oops when unregistering the VPA. Signed-off-by: Paul Mackerras Signed-off-by: Alexander Graf