- 10 1月, 2013 7 次提交
-
-
由 Alexander Graf 提交于
The External Proxy Facility in FSL BookE chips allows the interrupt controller to automatically acknowledge an interrupt as soon as a core gets its pending external interrupt delivered. Today, user space implements the interrupt controller, so we need to check on it during such a cycle. This patch implements logic for user space to enable EPR exiting, disable EPR exiting and EPR exiting itself, so that user space can acknowledge an interrupt when an external interrupt has successfully been delivered into the guest vcpu. Signed-off-by: NAlexander Graf <agraf@suse.de>
-
由 Alexander Graf 提交于
The EPR register is potentially valid for PR KVM as well, so we need to emulate accesses to it. It's only defined for reading, so only handle the mfspr case. Signed-off-by: NAlexander Graf <agraf@suse.de>
-
由 Alexander Graf 提交于
When injecting an interrupt into guest context, we usually don't need to check for requests anymore. At least not until today. With the introduction of EPR, we will have to create a request when the guest has successfully accepted an external interrupt though. So we need to prepare the interrupt delivery to abort guest entry gracefully. Otherwise we'd delay the EPR request. Signed-off-by: NAlexander Graf <agraf@suse.de>
-
由 Mihai Caraman 提交于
On mfspr/mtspr emulation path Book3E's MMUCFG SPR with value 1015 clashes with G4's MSSSR0 SPR. Move MSSSR0 emulation from generic part to Books3S. MSSSR0 also clashes with Book3S's DABRX SPR. DABRX was not explicitly handled so Book3S execution flow will behave as before. Signed-off-by: NMihai Caraman <mihai.caraman@freescale.com> Signed-off-by: NAlexander Graf <agraf@suse.de>
-
由 Alexander Graf 提交于
When running on top of pHyp, the hypercall instruction "sc 1" goes straight into pHyp without trapping in supervisor mode. So if we want to support PAPR guest in this configuration we need to add a second way of accessing PAPR hypercalls, preferably with the exact same semantics except for the instruction. So let's overlay an officially reserved instruction and emulate PAPR hypercalls whenever we hit that one. Signed-off-by: NAlexander Graf <agraf@suse.de>
-
由 Alexander Graf 提交于
When we hit an emulation result that we didn't expect, that is an error, but it's nothing that warrants a BUG(), because it can be guest triggered. So instead, let's only WARN() the user that this happened. Signed-off-by: NAlexander Graf <agraf@suse.de>
-
由 Mihai Caraman 提交于
Reflect the uapi folder change in SREGS API documentation. Signed-off-by: NMihai Caraman <mihai.caraman@freescale.com> Reviewed-by: Amos Kong <kongjianjun@gmail.com> Signed-off-by: NAlexander Graf <agraf@suse.de>
-
- 08 1月, 2013 9 次提交
-
-
由 Gleb Natapov 提交于
MMU code tries to avoid if()s HW is not able to predict reliably by using bitwise operation to streamline code execution, but in case of a dirty bit folding this gives us nothing since write_fault is checked right before the folding code. Lets just piggyback onto the if() to make code more clear. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Gleb Natapov 提交于
trace_kvm_mmu_delay_free_pages() is no longer used. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Cornelia Huck 提交于
Add a new capability, KVM_CAP_S390_CSS_SUPPORT, which will pass intercepts for channel I/O instructions to userspace. Only I/O instructions interacting with I/O interrupts need to be handled in-kernel: - TEST PENDING INTERRUPTION (tpi) dequeues and stores pending interrupts entirely in-kernel. - TEST SUBCHANNEL (tsch) dequeues pending interrupts in-kernel and exits via KVM_EXIT_S390_TSCH to userspace for subchannel- related processing. Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Reviewed-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Cornelia Huck 提交于
Make s390 support KVM_ENABLE_CAP. Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Acked-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Cornelia Huck 提交于
Explicitely catch all channel I/O related instructions intercepts in the kernel and set condition code 3 for them. This paves the way for properly handling these instructions later on. Note: This is not architecture compliant (the previous code wasn't either) since setting cc 3 is not the correct thing to do for some of these instructions. For Linux guests, however, it still has the intended effect of stopping css probing. Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Reviewed-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Cornelia Huck 提交于
Add support for injecting machine checks (only repressible conditions for now). This is a bit more involved than I/O interrupts, for these reasons: - Machine checks come in both floating and cpu varieties. - We don't have a bit for machine checks enabling, but have to use a roundabout approach with trapping PSW changing instructions and watching for opened machine checks. Reviewed-by: NAlexander Graf <agraf@suse.de> Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Cornelia Huck 提交于
Add support for handling I/O interrupts (standard, subchannel-related ones and rudimentary adapter interrupts). The subchannel-identifying parameters are encoded into the interrupt type. I/O interrupts are floating, so they can't be injected on a specific vcpu. Reviewed-by: NAlexander Graf <agraf@suse.de> Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Cornelia Huck 提交于
Introduce helper functions for decoding the various base/displacement instruction formats. Reviewed-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Cornelia Huck 提交于
These tables are never modified. Reviewed-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
- 03 1月, 2013 7 次提交
-
-
由 Gleb Natapov 提交于
With emulate_invalid_guest_state=0 if a vcpu is in real mode VMX can enter the vcpu with smaller segment limit than guest configured. If the guest tries to access pass this limit it will get #GP at which point instruction will be emulated with correct segment limit applied. If during the emulation IO is detected it is not handled correctly. Vcpu thread should exit to userspace to serve the IO, but it returns to the guest instead. Since emulation is not completed till userspace completes the IO the faulty instruction is re-executed ad infinitum. The patch fixes that by exiting to userspace if IO happens during instruction emulation. Reported-by: NAlex Williamson <alex.williamson@redhat.com> Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Gleb Natapov 提交于
Segment registers will be fixed according to current emulation policy during switching to real mode for the first time. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Gleb Natapov 提交于
Currently when emulation of invalid guest state is enable (emulate_invalid_guest_state=1) segment registers are still fixed for entry to vm86 mode some times. Segment register fixing is avoided in enter_rmode(), but vmx_set_segment() still does it unconditionally. The patch fixes it. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Gleb Natapov 提交于
Currently it allows entering vm86 mode if segment limit is greater than 0xffff and db bit is set. Both of those can cause incorrect execution of instruction by cpu since in vm86 mode limit will be set to 0xffff and db will be forced to 0. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Gleb Natapov 提交于
Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Gleb Natapov 提交于
According to Intel SDM Vol3 Section 5.5 "Privilege Levels" and 5.6 "Privilege Level Checking When Accessing Data Segments" RPL checking is done during loading of a segment selector, not during data access. We already do checking during segment selector loading, so drop the check during data access. Checking RPL during data access triggers #GP if after transition from real mode to protected mode RPL bits in a segment selector are set. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Jesse Larrew 提交于
Correct a typo in the comment explaining hypercalls. Signed-off-by: NJesse Larrew <jlarrew@linux.vnet.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
- 24 12月, 2012 1 次提交
-
-
由 Gleb Natapov 提交于
Move repetitive code sequence to a separate function. Reviewed-by: NAlex Williamson <alex.williamson@redhat.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
- 23 12月, 2012 9 次提交
-
-
由 Gleb Natapov 提交于
Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
由 Gleb Natapov 提交于
Move all vm86_active logic into one place. Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
由 Gleb Natapov 提交于
Segment descriptor's base is fixed by call to fix_rmode_seg(). Not need to do it twice. Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
由 Gleb Natapov 提交于
The code for SS and CS does the same thing fix_rmode_seg() is doing. Use it instead of hand crafted code. Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
由 Gleb Natapov 提交于
VMX without unrestricted mode cannot virtualize real mode, so if emulate_invalid_guest_state=0 kvm uses vm86 mode to approximate it. Sometimes, when guest moves from protected mode to real mode, it leaves segment descriptors in a state not suitable for use by vm86 mode virtualization, so we keep shadow copy of segment descriptors for internal use and load fake register to VMCS for guest entry to succeed. Till now we kept shadow for all segments except SS and CS (for SS and CS we returned parameters directly from VMCS), but since commit a5625189 emulator enforces segment limits in real mode. This causes #GP during move from protected mode to real mode when emulator fetches first instruction after moving to real mode since it uses incorrect CS base and limit to linearize the %rip. Fix by keeping shadow for SS and CS too. Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
由 Gleb Natapov 提交于
rmode_segment_valid() checks if segment descriptor can be used to enter vm86 mode. VMX spec mandates that in vm86 mode CS register will be of type data, not code. Lets allow guest entry with vm86 mode if the only problem with CS register is incorrect type. Otherwise entire real mode will be emulated. Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
由 Gleb Natapov 提交于
Set segment fields explicitly instead of using binary operations. No behaviour changes. Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
由 Alex Williamson 提交于
Previous patch "kvm: Minor memory slot optimization" (b7f69c55) overlooked the generation field of the memory slots. Re-using the original memory slots left us with with two slightly different memory slots with the same generation. To fix this, make update_memslots() take a new parameter to specify the last generation. This also makes generation management more explicit to avoid such problems in the future. Reported-by: NTakuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> Signed-off-by: NAlex Williamson <alex.williamson@redhat.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
由 Yang Zhang 提交于
This hack is wrong. The pin number of PIT is connected to 2 not 0. This means this hack never takes effect. So it is ok to remove it. Signed-off-by: NYang Zhang <yang.z.zhang@Intel.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
- 18 12月, 2012 4 次提交
-
-
由 Cornelia Huck 提交于
Add a driver for kvm guests that matches virtual ccw devices provided by the host as virtio bridge devices. These virtio-ccw devices use a special set of channel commands in order to perform virtio functions. Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Reviewed-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
由 Cornelia Huck 提交于
Get the definition of struct subchannel_id. Reviewed-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
由 Cornelia Huck 提交于
Running under a kvm host does not necessarily imply the presence of a page mapped above the main memory with the virtio information; however, the code includes a hard coded access to that page. Instead, check for the presence of the page and exit gracefully before we hit an addressing exception if it does not exist. Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Reviewed-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com> cc: stable@vger.kernel.org Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
由 Nickolai Zeldovich 提交于
The kvm i8254 emulation for counter 0 (but not for counters 1 and 2) has at least two bugs in mode 0: 1. The OUT bit, computed by pit_get_out(), is never set high. 2. The counter value, computed by pit_get_count(), wraps back around to the initial counter value, rather than wrapping back to 0xFFFF (which is the behavior described in the comment in __kpit_elapsed, the behavior implemented by qemu, and the behavior observed on AMD hardware). The bug stems from __kpit_elapsed computing the elapsed time mod the initial counter value (stored as nanoseconds in ps->period). This is both unnecessary (none of the callers of kpit_elapsed expect the value to be at most the initial counter value) and incorrect (it causes pit_get_count to appear to wrap around to the initial counter value rather than 0xFFFF). Removing this mod from __kpit_elapsed fixes both of the above bugs. Signed-off-by: NNickolai Zeldovich <nickolai@csail.mit.edu> Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NGleb Natapov <gleb@redhat.com>
-
- 15 12月, 2012 1 次提交
-
-
由 Gleb Natapov 提交于
Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
- 14 12月, 2012 2 次提交
-
-
由 Alex Williamson 提交于
With the 3 private slots, this gives us a nice round 128 slots total. The primary motivation for this is to support more assigned devices. Each assigned device can theoretically use up to 8 slots (6 MMIO BARs, 1 ROM BAR, 1 spare for a split MSI-X table mapping) though it's far more typical for a device to use 3-4 slots. If we assume a typical VM uses a dozen slots for non-assigned devices purposes, we should always be able to support 14 worst case assigned devices or 28 to 37 typical devices. Reviewed-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAlex Williamson <alex.williamson@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Alex Williamson 提交于
We're currently offering a whopping 32 memory slots to user space, an int is a bit excessive for storing this. We would like to increase our memslots, but SHRT_MAX should be more than enough. Reviewed-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAlex Williamson <alex.williamson@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-