search for: smccc

...ock features are available in this hypervisor. Also add the header file which defines the ABI for the paravirtualized lock features we're about to add. Signed-off-by: Zengruan Ye <yezengruan at huawei.com> --- arch/arm64/include/asm/pvlock-abi.h | 16 ++++++++++++++++ include/linux/arm-smccc.h | 13 +++++++++++++ virt/kvm/arm/hypercalls.c | 3 +++ 3 files changed, 32 insertions(+) create mode 100644 arch/arm64/include/asm/pvlock-abi.h diff --git a/arch/arm64/include/asm/pvlock-abi.h b/arch/arm64/include/asm/pvlock-abi.h new file mode 100644 index 000000000000..06...

...add the header file which defines the ABI for the paravirtualized >> lock features we're about to add. >> >> Signed-off-by: Zengruan Ye <yezengruan at huawei.com> >> --- >> arch/arm64/include/asm/pvlock-abi.h | 16 ++++++++++++++++ >> include/linux/arm-smccc.h | 13 +++++++++++++ >> virt/kvm/arm/hypercalls.c | 3 +++ >> 3 files changed, 32 insertions(+) >> create mode 100644 arch/arm64/include/asm/pvlock-abi.h >> >> diff --git a/arch/arm64/include/asm/pvlock-abi.h b/arch/arm64/include/asm/pvlock-abi.h...

...k.h | 7 ++ arch/arm64/kernel/Makefile | 2 +- arch/arm64/kernel/paravirt-spinlocks.c | 13 ++++ arch/arm64/kernel/paravirt.c | 95 +++++++++++++++++++++++++- arch/arm64/kernel/setup.c | 2 + arch/arm64/kvm/Makefile | 1 + include/linux/arm-smccc.h | 13 ++++ include/linux/cpuhotplug.h | 1 + virt/kvm/arm/arm.c | 8 +++ virt/kvm/arm/hypercalls.c | 7 ++ virt/kvm/arm/pvlock.c | 21 ++++++ 16 files changed, 260 insertions(+), 2 deletions(-) create mode 100644 Docum...

...k.h | 7 ++ arch/arm64/kernel/Makefile | 2 +- arch/arm64/kernel/paravirt-spinlocks.c | 13 ++++ arch/arm64/kernel/paravirt.c | 95 +++++++++++++++++++++++++- arch/arm64/kernel/setup.c | 2 + arch/arm64/kvm/Makefile | 1 + include/linux/arm-smccc.h | 13 ++++ include/linux/cpuhotplug.h | 1 + virt/kvm/arm/arm.c | 8 +++ virt/kvm/arm/hypercalls.c | 7 ++ virt/kvm/arm/pvlock.c | 21 ++++++ 16 files changed, 260 insertions(+), 2 deletions(-) create mode 100644 Docum...

...>> + >> +Paravirtualized lock support for arm64 >> +====================================== >> + >> +KVM/arm64 provids some hypervisor service calls to support a paravirtualized >> +guest obtaining the vcpu is currently running or not. >> + >> +Two new SMCCC compatible hypercalls are defined: >> + >> +* PV_LOCK_FEATURES: 0xC5000040 >> +* PV_LOCK_PREEMPTED: 0xC5000041 > > These values are in the "Standard Hypervisor Service Calls" section of > SMCCC - so is there a document that describes this features such that...

...o avoid lifetime issues about kexec. * Provide VCPU attributes for PV lock. * Update SMC number of PV lock features. * Report some basic validation when PV lock init. * Document preempted field. * Bunch of typo fixes. Zengruan Ye (6): KVM: arm64: Document PV-lock interface KVM: arm64: Add SMCCC paravirtualised lock calls KVM: arm64: Support pvlock preempted via shared structure KVM: arm64: Provide VCPU attributes for PV lock KVM: arm64: Add interface to support VCPU preempted check KVM: arm64: Support the VCPU preemption check Documentation/virt/kvm/arm/pvlock.rst | 63 ++++++...

...date the memory allocation mechanism of the PV lock structure to avoid lifetime issues about kexec. > >> + >> + return 0; >> +} >> + >> +static int init_pvlock_vcpu_state(unsigned int cpu) >> +{ >> + struct pvlock_vcpu_state *reg; >> + struct arm_smccc_res res; >> + >> + reg = this_cpu_ptr(&pvlock_vcpu_region); >> + if (!reg) >> + return -EFAULT; >> + >> + /* Pass the memory address to host via hypercall */ >> + arm_smccc_1_1_invoke(ARM_SMCCC_HV_PV_LOCK_PREEMPTED, >> + virt_to_phys(reg),...

...t; index ff13871fd85a..5964982ccd05 100644 >> --- a/virt/kvm/arm/hypercalls.c >> +++ b/virt/kvm/arm/hypercalls.c >> @@ -65,6 +65,10 @@ int kvm_hvc_call_handler(struct kvm_vcpu *vcpu) >> if (gpa != GPA_INVALID) >> val = gpa; >> break; >> + case ARM_SMCCC_HV_PV_LOCK_PREEMPTED: >> + vcpu->arch.pv.base = smccc_get_arg1(vcpu); >> + val = SMCCC_RET_SUCCESS; > > It would be useful to at least do some basic validation that the address > passed in is valid. Debugging problems with this interface will be hard > if it always ret...

...include <drm/drmP.h> > > #include <drm/drm_atomic_helper.h> > > #include <drm/drm_crtc.h> > > -#include <drm/drm_crtc_helper.h> > > +#include <drm/drm_probe_helper.h> > > #include <drm/drm_edid.h> > > #include <linux/arm-smccc.h> > > #include <linux/clk.h> > > diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c > > index 75d97f1b2e8f..ec573c04206b 100644 > > --- a/drivers/gpu/drm/meson/meson_crtc.c > > +++ b/drivers/gpu/drm/meson/meson_crtc.c > &...

...+ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -14,7 +14,7 @@ #include <drm/drmP.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> -#include <drm/drm_crtc_helper.h> +#include <drm/drm_probe_helper.h> #include <drm/drm_edid.h> #include <linux/arm-smccc.h> #include <linux/clk.h> diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c index 75d97f1b2e8f..ec573c04206b 100644 --- a/drivers/gpu/drm/meson/meson_crtc.c +++ b/drivers/gpu/drm/meson/meson_crtc.c @@ -30,7 +30,7 @@ #include <drm/drm_atomic.h> #i...

...+ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -14,7 +14,7 @@ #include <drm/drmP.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> -#include <drm/drm_crtc_helper.h> +#include <drm/drm_probe_helper.h> #include <drm/drm_edid.h> #include <linux/arm-smccc.h> #include <linux/clk.h> diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c index 75d97f1b2e8f..ec573c04206b 100644 --- a/drivers/gpu/drm/meson/meson_crtc.c +++ b/drivers/gpu/drm/meson/meson_crtc.c @@ -30,7 +30,7 @@ #include <drm/drm_atomic.h> #i...

...+ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -14,7 +14,7 @@ #include <drm/drmP.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> -#include <drm/drm_crtc_helper.h> +#include <drm/drm_probe_helper.h> #include <drm/drm_edid.h> #include <linux/arm-smccc.h> #include <linux/clk.h> diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c index 75d97f1b2e8f..ec573c04206b 100644 --- a/drivers/gpu/drm/meson/meson_crtc.c +++ b/drivers/gpu/drm/meson/meson_crtc.c @@ -30,7 +30,7 @@ #include <drm/drm_atomic.h> #i...

...> @@ -14,7 +14,7 @@ > #include <drm/drmP.h> > #include <drm/drm_atomic_helper.h> > #include <drm/drm_crtc.h> > -#include <drm/drm_crtc_helper.h> > +#include <drm/drm_probe_helper.h> > #include <drm/drm_edid.h> > #include <linux/arm-smccc.h> > #include <linux/clk.h> > diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c > index 75d97f1b2e8f..ec573c04206b 100644 > --- a/drivers/gpu/drm/meson/meson_crtc.c > +++ b/drivers/gpu/drm/meson/meson_crtc.c > @@ -30,7 +30,7 @@ > #i...

...+ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -14,7 +14,7 @@ #include <drm/drmP.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> -#include <drm/drm_crtc_helper.h> +#include <drm/drm_probe_helper.h> #include <drm/drm_edid.h> #include <linux/arm-smccc.h> #include <linux/clk.h> diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c index 75d97f1b2e8f..ec573c04206b 100644 --- a/drivers/gpu/drm/meson/meson_crtc.c +++ b/drivers/gpu/drm/meson/meson_crtc.c @@ -30,7 +30,7 @@ #include <drm/drm_atomic.h> #i...

...+ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -14,7 +14,7 @@ #include <drm/drmP.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> -#include <drm/drm_crtc_helper.h> +#include <drm/drm_probe_helper.h> #include <drm/drm_edid.h> #include <linux/arm-smccc.h> #include <linux/clk.h> diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c index 75d97f1b2e8f..ec573c04206b 100644 --- a/drivers/gpu/drm/meson/meson_crtc.c +++ b/drivers/gpu/drm/meson/meson_crtc.c @@ -30,7 +30,7 @@ #include <drm/drm_atomic.h> #i...

...+ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -14,7 +14,7 @@ #include <drm/drmP.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> -#include <drm/drm_crtc_helper.h> +#include <drm/drm_probe_helper.h> #include <drm/drm_edid.h> #include <linux/arm-smccc.h> #include <linux/clk.h> diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c index 75d97f1b2e8f..ec573c04206b 100644 --- a/drivers/gpu/drm/meson/meson_crtc.c +++ b/drivers/gpu/drm/meson/meson_crtc.c @@ -30,7 +30,7 @@ #include <drm/drm_atomic.h> #i...

...; > > #include <drm/drm_atomic_helper.h> > > > #include <drm/drm_crtc.h> > > > -#include <drm/drm_crtc_helper.h> > > > +#include <drm/drm_probe_helper.h> > > > #include <drm/drm_edid.h> > > > #include <linux/arm-smccc.h> > > > #include <linux/clk.h> > > > diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c > > > index 75d97f1b2e8f..ec573c04206b 100644 > > > --- a/drivers/gpu/drm/meson/meson_crtc.c > > > +++ b/drivers/gpu/drm/...

...include <drm/drmP.h> > > #include <drm/drm_atomic_helper.h> > > #include <drm/drm_crtc.h> > > -#include <drm/drm_crtc_helper.h> > > +#include <drm/drm_probe_helper.h> > > #include <drm/drm_edid.h> > > #include <linux/arm-smccc.h> > > #include <linux/clk.h> > > diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c > > index 75d97f1b2e8f..ec573c04206b 100644 > > --- a/drivers/gpu/drm/meson/meson_crtc.c > > +++ b/drivers/gpu/drm/meson/meson_crtc.c > &...

...> @@ -14,7 +14,7 @@ > #include <drm/drmP.h> > #include <drm/drm_atomic_helper.h> > #include <drm/drm_crtc.h> > -#include <drm/drm_crtc_helper.h> > +#include <drm/drm_probe_helper.h> > #include <drm/drm_edid.h> > #include <linux/arm-smccc.h> > #include <linux/clk.h> > diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c > index 75d97f1b2e8f..ec573c04206b 100644 > --- a/drivers/gpu/drm/meson/meson_crtc.c > +++ b/drivers/gpu/drm/meson/meson_crtc.c > @@ -30,7 +30,7 @@ > #i...

...+ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -14,7 +14,7 @@ #include <drm/drmP.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> -#include <drm/drm_crtc_helper.h> +#include <drm/drm_probe_helper.h> #include <drm/drm_edid.h> #include <linux/arm-smccc.h> #include <linux/clk.h> diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c index 4f5c67f70c4d..43e29984f8b1 100644 --- a/drivers/gpu/drm/meson/meson_crtc.c +++ b/drivers/gpu/drm/meson/meson_crtc.c @@ -30,7 +30,7 @@ #include <drm/drm_atomic.h> #i...