[PATCH] ARM/ARM64: KVM: remove 'config KVM_ARM_MAX_VCPUS'

This patch removes config option of KVM_ARM_MAX_VCPUS, and like other ARCHs, just choose the maximum allowed value from hardware, and follows the reasons: 1) from distribution view, the option has to be defined as the max allowed value because it need to meet all kinds of virtulization

Re: [RFC PATCH v3 0/3] vfio: platform: return device properties for a platform device

On Wed, Sep 02, 2015 at 09:21:26AM +0200, Baptiste Reynal wrote: > On Tue, Sep 1, 2015 at 5:52 PM, Christoffer Dall > wrote: > > On Tue, Sep 01, 2015 at 05:32:21PM +0200, Baptiste Reynal wrote: > >> Hi everyone, > >> > >> The usefullness of this patch has already been

[PATCH v2 2/5] KVM: arm64: Implement vGICv3 distributor and redistributor access from userspace

The access is done similar to vGICv2, using KVM_DEV_ARM_VGIC_GRP_DIST_REGS and KVM_DEV_ARM_VGIC_GRP_REDIST_REGS with KVM_SET_DEVICE_ATTR and KVM_GET_DEVICE_ATTR ioctls. Some registers are 64-bit wide according to the specification. KVM_DEV_ARM_VGIC_64BIT flag is introduced, allowing to perform

[PATCH v2 0/5] KVM: arm64: Implement API for vGICv3 live migration

This patchset adds necessary userspace API in order to support vGICv3 live migration. GICv3 registers are accessed using device attribute ioctls, similar to GICv2. v1 => v2: - Do not use generic register get/set API for CPU interface, use only device attributes. - Introduce size specifier for

[PATCH v2 3/5] KVM: arm64: Refactor system register handlers

Replace Rt with data pointer in struct sys_reg_params. This will allow to reuse system register handling code in implementation of vGICv3 CPU interface access API. Additionally, got rid of "massive hack" in kvm_handle_cp_64(). Signed-off-by: Pavel Fedin ---

[PATCH v2 5/5] Implement vGICv3 CPU interface access

The access is done similar to GICv2, using KVM_DEV_ARM_VGIC_GRP_CPU_REGS group, however attribute ID encodes corresponding system register. Access size is always 64 bits. Since CPU interface state actually affects only a single vCPU, no vGIC locking is done. Just made sure that the vCPU is not

[PATCH v2 1/5] KVM: arm/arm64: Refactor vGIC attributes handling code

Separate all implementation-independent code in vgic_attr_regs_access() and move it to vgic.c. This will allow to reuse this code for vGICv3 implementation. Signed-off-by: Pavel Fedin --- virt/kvm/arm/vgic-v2-emul.c | 126 +---

Re: [RFC PATCH v3 0/3] vfio: platform: return device properties for a platform device

On Tue, Sep 1, 2015 at 5:52 PM, Christoffer Dall wrote: > On Tue, Sep 01, 2015 at 05:32:21PM +0200, Baptiste Reynal wrote: >> Hi everyone, >> >> The usefullness of this patch has already been discussed during the >> first releases >>

Re: [PATCH v4 11/15] KVM: arm: add a function to keep track of host use of the debug registers

On Mon, Aug 10, 2015 at 09:26:03PM +0800, Zhichao Huang wrote: > As we're about to implement a lazy world switch for debug registers, > we add a function reading the break/watch control variables directly to > indicate whether the host has enabled any break/watch points or not. > > Signed-off-by:

Re: [PATCH v4 15/15] KVM: arm: enable trapping of all debug registers

On Mon, Aug 10, 2015 at 09:26:07PM +0800, Zhichao Huang wrote: > Enable trapping of the debug registers unconditionally, allowing guests to > use the debug infrastructure. > > Signed-off-by: Zhichao Huang > Reviewed-by: Christoffer Dall >

Re: [RFC PATCH v3 0/3] vfio: platform: return device properties for a platform device

On Wed, 2015-09-02 at 11:49 +0200, Baptiste Reynal wrote: > On Wed, Sep 2, 2015 at 11:21 AM, Christoffer Dall > wrote: > > On Wed, Sep 02, 2015 at 09:21:26AM +0200, Baptiste Reynal wrote: > >> On Tue, Sep 1, 2015 at 5:52 PM, Christoffer Dall > >>

Re: [PATCH v4 06/15] KVM: arm: add trap handlers for 32-bit debug registers

On Mon, Aug 10, 2015 at 09:25:58PM +0800, Zhichao Huang wrote: > Add handlers for all the 32-bit debug registers. > > Signed-off-by: Zhichao Huang Reviewed-by: Christoffer Dall ___ kvmarm mailing

Re: [PATCH v4 12/15] KVM: arm: keep track of host use of the debug registers

On Mon, Aug 10, 2015 at 09:26:04PM +0800, Zhichao Huang wrote: > Every guest entry, we need to keep track of host use of the debug > registers. > > We only call the function upon guest entry, after preempt_disable() > and local_irq_disable(), so there is no race for it. what about on SMP? It

Re: [PATCH v4 13/15] KVM: arm: keep track of guest use of the debug registers

On Mon, Aug 10, 2015 at 09:26:05PM +0800, Zhichao Huang wrote: > We trap debug register accesses from guest all the time, and read the > BCR/WCR to indicate whether the guest has enabled any break/watch points > or not. > > Signed-off-by: Zhichao Huang > --- >

Re: [PATCH v3 05/10] VFIO: platform: add vfio_platform_is_active

On Mon, Aug 10, 2015 at 03:20:59PM +0200, Eric Auger wrote: > This function returns whether the IRQ is active at irqchip level or > VFIO masked. If either is true, it is considered the IRQ is active. > Currently there is no way to differentiate userspace masked IRQ from > automasked IRQ. There

Re: [PATCH v3 07/10] KVM: arm/arm64: vgic: Allow HW interrupts for non-shared devices

On Mon, Aug 10, 2015 at 03:21:01PM +0200, Eric Auger wrote: > From: Marc Zyngier > > So far, the only use of the HW interrupt facility was the timer, > implying that the active state is context-switched for each vcpu, > as the device is is shared across all vcpus. > > This

Re: [PATCH v3 06/10] VFIO: platform: add irq bypass producer management

On Mon, Aug 10, 2015 at 03:21:00PM +0200, Eric Auger wrote: > This patch populates the IRQ bypass callacks: > - stop/start producer simply consist in disabling/enabling the host irq > - add/del consumer: basically set the automasked flag to false/true > > Signed-off-by: Eric Auger

Re: [PATCH v3 09/10] KVM: arm/arm64: vgic: forwarding control

On Mon, Aug 10, 2015 at 03:21:03PM +0200, Eric Auger wrote: > Implements kvm_vgic_[set|unset]_forward. > > Handle low-level VGIC programming: physical IRQ/guest IRQ mapping, > list register cleanup, VGIC state machine. Also interacts with > the irqchip. > > Signed-off-by: Eric Auger

Re: [PATCH v3 00/10] ARM IRQ forward control based on IRQ bypass manager

On Mon, Aug 10, 2015 at 03:20:54PM +0200, Eric Auger wrote: > This series allows to set ARM IRQ forwarding between a VFIO platform > device physical IRQ and a guest virtual IRQ. The link is coordinated > by the IRQ bypass manager. > > The principle is the VFIO platform driver registers an IRQ

Re: [PATCH v4 01/15] KVM: arm: plug guest debug exploit

On Mon, Aug 10, 2015 at 09:25:53PM +0800, Zhichao Huang wrote: > Hardware debugging in guests is not intercepted currently, it means > that a malicious guest can bring down the entire machine by writing > to the debug registers. > > This patch enable trapping of all debug registers, preventing

Re: [PATCH] ARM/ARM64: KVM: remove 'config KVM_ARM_MAX_VCPUS'

On Wed, Sep 2, 2015 at 6:25 PM, Christoffer Dall wrote: > On Wed, Sep 02, 2015 at 02:31:21PM +0800, Ming Lei wrote: >> This patch removes config option of KVM_ARM_MAX_VCPUS, >> and like other ARCHs, just choose the maximum allowed >> value from hardware, and follows

Re: [PATCH 00/14] arm64: 16K translation granule support

On 13 August 2015 at 13:33, Suzuki K. Poulose wrote: > From: "Suzuki K. Poulose" > > This series enables the 16K page size support on Linux for arm64. > This series adds support for 48bit VA(4 level), 47bit VA(3 level) and > 36bit VA(2 level) with

Re: [PATCH 00/14] arm64: 16K translation granule support

On 02/09/15 10:55, Ard Biesheuvel wrote: On 13 August 2015 at 13:33, Suzuki K. Poulose wrote: From: "Suzuki K. Poulose" Patches 1-7 cleans up the kernel page size handling code. Patches 8-11 Fixes some issues with the KVM bits, mainly the

Re: [PATCH] ARM/ARM64: KVM: remove 'config KVM_ARM_MAX_VCPUS'

On Wed, Sep 02, 2015 at 02:31:21PM +0800, Ming Lei wrote: > This patch removes config option of KVM_ARM_MAX_VCPUS, > and like other ARCHs, just choose the maximum allowed > value from hardware, and follows the reasons: > > 1) from distribution view, the option has to be > defined as the max

Re: [RFC PATCH v3 0/3] vfio: platform: return device properties for a platform device

On Wed, Sep 02, 2015 at 11:49:12AM +0200, Baptiste Reynal wrote: > On Wed, Sep 2, 2015 at 11:21 AM, Christoffer Dall > wrote: > > On Wed, Sep 02, 2015 at 09:21:26AM +0200, Baptiste Reynal wrote: > >> On Tue, Sep 1, 2015 at 5:52 PM, Christoffer Dall > >>

Re: [PATCH 12/14] arm64: Check for selected granule support

On 13 August 2015 at 19:29, Catalin Marinas wrote: > On Thu, Aug 13, 2015 at 03:45:07PM +0100, Suzuki K. Poulose wrote: >> On 13/08/15 13:28, Steve Capper wrote: >> >On 13 August 2015 at 12:34, Suzuki K. Poulose >> >wrote: >> >> __enable_mmu: >>

Re: [PATCH 12/14] arm64: Check for selected granule support

On 2 September 2015 at 11:48, Ard Biesheuvel wrote: > On 13 August 2015 at 19:29, Catalin Marinas wrote: >> On Thu, Aug 13, 2015 at 03:45:07PM +0100, Suzuki K. Poulose wrote: >>> On 13/08/15 13:28, Steve Capper wrote: >>> >On 13 August 2015 at

Re: [PATCH v4 04/15] KVM: arm: common infrastructure for handling AArch32 CP14/CP15

On Mon, Aug 10, 2015 at 09:25:56PM +0800, Zhichao Huang wrote: > As we're about to trap a bunch of CP14 registers, let's rework > the CP15 handling so it can be generalized and work with multiple > tables. > > We stop trapping access here, because we haven't finished our trap > handlers. We will

Re: [PATCH v4 10/15] KVM: arm: implement world switch for debug registers

On Mon, Aug 10, 2015 at 09:26:02PM +0800, Zhichao Huang wrote: > Implement switching of the debug registers. While the number > of registers is massive, CPUs usually don't implement them all > (A15 has 6 breakpoints and 4 watchpoints, which gives us a total > of 22 registers "only"). > >

Re: [PATCH v4 09/15] KVM: arm: redefine kvm_cpu_context_t to save the host cp14 states

On Mon, Aug 10, 2015 at 09:26:01PM +0800, Zhichao Huang wrote: > Redefine kvm_cpu_context_t as a new struct that include the cp14 states, > which we used to save the host cp14 states. > > Signed-off-by: Zhichao Huang > --- > arch/arm/include/asm/kvm_host.h | 6 +- >