Pls add IT913x options in kernel #114
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I would also like to vote for support for IT9135 Version 2 in the kernel. The code available from linuxtv has support for Version 2 devices: MODULE_PARM_DESC(firmware, "set firmware 0=auto" Like Beacha, I am trying to use this USB DVB-T device with the Pi to create a home PVR. Many thanks for your help. |
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The request still stands, but I found a temp solution: Hope this helps for now |
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The default kernel should support this: You will have to download the firmware yourself. The "next" kernel should support the v2 device: again, you will need to download the firmware. For info about "next" firmware see: |
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Many thanks both for your quick replies. |
toddtreece
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Mar 4, 2015
modified Makefile to allow out of tree build with custom config file
davet321
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May 7, 2015
commit fd1d0dd upstream. When userland injects a SPI via the KVM_IRQ_LINE ioctl we currently only check it against a fixed limit, which historically is set to 127. With the new dynamic IRQ allocation the effective limit may actually be smaller (64). So when now a malicious or buggy userland injects a SPI in that range, we spill over on our VGIC bitmaps and bytemaps memory. I could trigger a host kernel NULL pointer dereference with current mainline by injecting some bogus IRQ number from a hacked kvmtool: ----------------- .... DEBUG: kvm_vgic_inject_irq(kvm, cpu=0, irq=114, level=1) DEBUG: vgic_update_irq_pending(kvm, cpu=0, irq=114, level=1) DEBUG: IRQ raspberrypi#114 still in the game, writing to bytemap now... Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = ffffffc07652e000 [00000000] *pgd=00000000f658b003, *pud=00000000f658b003, *pmd=0000000000000000 Internal error: Oops: 96000006 [raspberrypi#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 1053 Comm: lkvm-msi-irqinj Not tainted 4.0.0-rc7+ raspberrypi#3027 Hardware name: FVP Base (DT) task: ffffffc0774e9680 ti: ffffffc0765a8000 task.ti: ffffffc0765a8000 PC is at kvm_vgic_inject_irq+0x234/0x310 LR is at kvm_vgic_inject_irq+0x30c/0x310 pc : [<ffffffc0000ae0a8>] lr : [<ffffffc0000ae180>] pstate: 80000145 ..... So this patch fixes this by checking the SPI number against the actual limit. Also we remove the former legacy hard limit of 127 in the ioctl code. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> [maz: wrap KVM_ARM_IRQ_GIC_MAX with #ifndef __KERNEL__, as suggested by Christopher Covington] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
popcornmix
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May 23, 2015
[ Upstream commit fd1d0dd ] When userland injects a SPI via the KVM_IRQ_LINE ioctl we currently only check it against a fixed limit, which historically is set to 127. With the new dynamic IRQ allocation the effective limit may actually be smaller (64). So when now a malicious or buggy userland injects a SPI in that range, we spill over on our VGIC bitmaps and bytemaps memory. I could trigger a host kernel NULL pointer dereference with current mainline by injecting some bogus IRQ number from a hacked kvmtool: ----------------- .... DEBUG: kvm_vgic_inject_irq(kvm, cpu=0, irq=114, level=1) DEBUG: vgic_update_irq_pending(kvm, cpu=0, irq=114, level=1) DEBUG: IRQ #114 still in the game, writing to bytemap now... Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = ffffffc07652e000 [00000000] *pgd=00000000f658b003, *pud=00000000f658b003, *pmd=0000000000000000 Internal error: Oops: 96000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 1053 Comm: lkvm-msi-irqinj Not tainted 4.0.0-rc7+ #3027 Hardware name: FVP Base (DT) task: ffffffc0774e9680 ti: ffffffc0765a8000 task.ti: ffffffc0765a8000 PC is at kvm_vgic_inject_irq+0x234/0x310 LR is at kvm_vgic_inject_irq+0x30c/0x310 pc : [<ffffffc0000ae0a8>] lr : [<ffffffc0000ae180>] pstate: 80000145 ..... So this patch fixes this by checking the SPI number against the actual limit. Also we remove the former legacy hard limit of 127 in the ioctl code. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> CC: <stable@vger.kernel.org> # 4.0, 3.19, 3.18 [maz: wrap KVM_ARM_IRQ_GIC_MAX with #ifndef __KERNEL__, as suggested by Christopher Covington] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
popcornmix
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Jun 5, 2015
[ Upstream commit fd1d0dd ] When userland injects a SPI via the KVM_IRQ_LINE ioctl we currently only check it against a fixed limit, which historically is set to 127. With the new dynamic IRQ allocation the effective limit may actually be smaller (64). So when now a malicious or buggy userland injects a SPI in that range, we spill over on our VGIC bitmaps and bytemaps memory. I could trigger a host kernel NULL pointer dereference with current mainline by injecting some bogus IRQ number from a hacked kvmtool: ----------------- .... DEBUG: kvm_vgic_inject_irq(kvm, cpu=0, irq=114, level=1) DEBUG: vgic_update_irq_pending(kvm, cpu=0, irq=114, level=1) DEBUG: IRQ #114 still in the game, writing to bytemap now... Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = ffffffc07652e000 [00000000] *pgd=00000000f658b003, *pud=00000000f658b003, *pmd=0000000000000000 Internal error: Oops: 96000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 1053 Comm: lkvm-msi-irqinj Not tainted 4.0.0-rc7+ #3027 Hardware name: FVP Base (DT) task: ffffffc0774e9680 ti: ffffffc0765a8000 task.ti: ffffffc0765a8000 PC is at kvm_vgic_inject_irq+0x234/0x310 LR is at kvm_vgic_inject_irq+0x30c/0x310 pc : [<ffffffc0000ae0a8>] lr : [<ffffffc0000ae180>] pstate: 80000145 ..... So this patch fixes this by checking the SPI number against the actual limit. Also we remove the former legacy hard limit of 127 in the ioctl code. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> CC: <stable@vger.kernel.org> # 4.0, 3.19, 3.18 [maz: wrap KVM_ARM_IRQ_GIC_MAX with #ifndef __KERNEL__, as suggested by Christopher Covington] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
popcornmix
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Feb 19, 2018
commit 5516e21 upstream. Currently a crash can be seen if we reach the "err" label in dmi_add_platform_ipmi(), calling platform_device_put(), like here: [ 7.270584] (null): ipmi:dmi: Unable to add resources: -16 [ 7.330229] ------------[ cut here ]------------ [ 7.334889] kernel BUG at mm/slub.c:3894! [ 7.338936] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP [ 7.344475] Modules linked in: [ 7.347556] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.15.0-rc2-00004-gbe9cb7b-dirty #114 [ 7.355907] Hardware name: Huawei Taishan 2280 /D05, BIOS Hisilicon D05 IT17 Nemo 2.0 RC0 11/29/2017 [ 7.365137] task: 00000000c211f6d3 task.stack: 00000000f276e9af [ 7.371116] pstate: 60000005 (nZCv daif -PAN -UAO) [ 7.375957] pc : kfree+0x194/0x1b4 [ 7.379389] lr : platform_device_release+0xcc/0xd8 [ 7.384225] sp : ffff0000092dba90 [ 7.387567] x29: ffff0000092dba90 x28: ffff000008a83000 [ 7.392933] x27: ffff0000092dbc10 x26: 00000000000000e6 [ 7.398297] x25: 0000000000000003 x24: ffff0000085b51e8 [ 7.403662] x23: 0000000000000100 x22: ffff7e0000234cc0 [ 7.409027] x21: ffff000008af3660 x20: ffff8017d21acc10 [ 7.414392] x19: ffff8017d21acc00 x18: 0000000000000002 [ 7.419757] x17: 0000000000000001 x16: 0000000000000008 [ 7.425121] x15: 0000000000000001 x14: 6666666678303d65 [ 7.430486] x13: 6469727265766f5f x12: 7265766972642e76 [ 7.435850] x11: 6564703e2d617020 x10: 6530326435373638 [ 7.441215] x9 : 3030303030303030 x8 : 3d76656420657361 [ 7.446580] x7 : ffff000008f59df8 x6 : ffff8017fbe0ea50 [ 7.451945] x5 : 0000000000000000 x4 : 0000000000000000 [ 7.457309] x3 : ffffffffffffffff x2 : 0000000000000000 [ 7.462674] x1 : 0fffc00000000800 x0 : ffff7e0000234ce0 [ 7.468039] Process swapper/0 (pid: 1, stack limit = 0x00000000f276e9af) [ 7.474809] Call trace: [ 7.477272] kfree+0x194/0x1b4 [ 7.480351] platform_device_release+0xcc/0xd8 [ 7.484837] device_release+0x34/0x90 [ 7.488531] kobject_put+0x70/0xcc [ 7.491961] put_device+0x14/0x1c [ 7.495304] platform_device_put+0x14/0x1c [ 7.499439] dmi_add_platform_ipmi+0x348/0x3ac [ 7.503923] scan_for_dmi_ipmi+0xfc/0x10c [ 7.507970] do_one_initcall+0x38/0x124 [ 7.511840] kernel_init_freeable+0x188/0x228 [ 7.516238] kernel_init+0x10/0x100 [ 7.519756] ret_from_fork+0x10/0x18 [ 7.523362] Code: f94002c0 37780080 f94012c0 37000040 (d4210000) [ 7.529552] ---[ end trace 11750e4787deef9e ]--- [ 7.534228] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 7.534228] This is because when the device is released in platform_device_release(), we try to free pdev.driver_override. This is a const string, hence the crash. Fix by using dynamic memory for pdev->driver_override. Signed-off-by: John Garry <john.garry@huawei.com> [Removed the free of driver_override from ipmi_si_remove_by_dev(). The free is done in platform_device_release(), and would result in a double free, and ipmi_si_remove_by_dev() is called by non-platform devices.] Signed-off-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
popcornmix
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Feb 19, 2018
commit 5516e21 upstream. Currently a crash can be seen if we reach the "err" label in dmi_add_platform_ipmi(), calling platform_device_put(), like here: [ 7.270584] (null): ipmi:dmi: Unable to add resources: -16 [ 7.330229] ------------[ cut here ]------------ [ 7.334889] kernel BUG at mm/slub.c:3894! [ 7.338936] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP [ 7.344475] Modules linked in: [ 7.347556] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.15.0-rc2-00004-gbe9cb7b-dirty #114 [ 7.355907] Hardware name: Huawei Taishan 2280 /D05, BIOS Hisilicon D05 IT17 Nemo 2.0 RC0 11/29/2017 [ 7.365137] task: 00000000c211f6d3 task.stack: 00000000f276e9af [ 7.371116] pstate: 60000005 (nZCv daif -PAN -UAO) [ 7.375957] pc : kfree+0x194/0x1b4 [ 7.379389] lr : platform_device_release+0xcc/0xd8 [ 7.384225] sp : ffff0000092dba90 [ 7.387567] x29: ffff0000092dba90 x28: ffff000008a83000 [ 7.392933] x27: ffff0000092dbc10 x26: 00000000000000e6 [ 7.398297] x25: 0000000000000003 x24: ffff0000085b51e8 [ 7.403662] x23: 0000000000000100 x22: ffff7e0000234cc0 [ 7.409027] x21: ffff000008af3660 x20: ffff8017d21acc10 [ 7.414392] x19: ffff8017d21acc00 x18: 0000000000000002 [ 7.419757] x17: 0000000000000001 x16: 0000000000000008 [ 7.425121] x15: 0000000000000001 x14: 6666666678303d65 [ 7.430486] x13: 6469727265766f5f x12: 7265766972642e76 [ 7.435850] x11: 6564703e2d617020 x10: 6530326435373638 [ 7.441215] x9 : 3030303030303030 x8 : 3d76656420657361 [ 7.446580] x7 : ffff000008f59df8 x6 : ffff8017fbe0ea50 [ 7.451945] x5 : 0000000000000000 x4 : 0000000000000000 [ 7.457309] x3 : ffffffffffffffff x2 : 0000000000000000 [ 7.462674] x1 : 0fffc00000000800 x0 : ffff7e0000234ce0 [ 7.468039] Process swapper/0 (pid: 1, stack limit = 0x00000000f276e9af) [ 7.474809] Call trace: [ 7.477272] kfree+0x194/0x1b4 [ 7.480351] platform_device_release+0xcc/0xd8 [ 7.484837] device_release+0x34/0x90 [ 7.488531] kobject_put+0x70/0xcc [ 7.491961] put_device+0x14/0x1c [ 7.495304] platform_device_put+0x14/0x1c [ 7.499439] dmi_add_platform_ipmi+0x348/0x3ac [ 7.503923] scan_for_dmi_ipmi+0xfc/0x10c [ 7.507970] do_one_initcall+0x38/0x124 [ 7.511840] kernel_init_freeable+0x188/0x228 [ 7.516238] kernel_init+0x10/0x100 [ 7.519756] ret_from_fork+0x10/0x18 [ 7.523362] Code: f94002c0 37780080 f94012c0 37000040 (d4210000) [ 7.529552] ---[ end trace 11750e4787deef9e ]--- [ 7.534228] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 7.534228] This is because when the device is released in platform_device_release(), we try to free pdev.driver_override. This is a const string, hence the crash. Fix by using dynamic memory for pdev->driver_override. Signed-off-by: John Garry <john.garry@huawei.com> [Removed the free of driver_override from ipmi_si_remove_by_dev(). The free is done in platform_device_release(), and would result in a double free, and ipmi_si_remove_by_dev() is called by non-platform devices.] Signed-off-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
popcornmix
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May 4, 2022
kvm->arch.arm_pmu is set when userspace attempts to set the first PMU attribute. As certain attributes are mandatory, arm_pmu ends up always being set to a valid arm_pmu, otherwise KVM will refuse to run the VCPU. However, this only happens if the VCPU has the PMU feature. If the VCPU doesn't have the feature bit set, kvm->arch.arm_pmu will be left uninitialized and equal to NULL. KVM doesn't do ID register emulation for 32-bit guests and accesses to the PMU registers aren't gated by the pmu_visibility() function. This is done to prevent injecting unexpected undefined exceptions in guests which have detected the presence of a hardware PMU. But even though the VCPU feature is missing, KVM still attempts to emulate certain aspects of the PMU when PMU registers are accessed. This leads to a NULL pointer dereference like this one, which happens on an odroid-c4 board when running the kvm-unit-tests pmu-cycle-counter test with kvmtool and without the PMU feature being set: [ 454.402699] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000150 [ 454.405865] Mem abort info: [ 454.408596] ESR = 0x96000004 [ 454.411638] EC = 0x25: DABT (current EL), IL = 32 bits [ 454.416901] SET = 0, FnV = 0 [ 454.419909] EA = 0, S1PTW = 0 [ 454.423010] FSC = 0x04: level 0 translation fault [ 454.427841] Data abort info: [ 454.430687] ISV = 0, ISS = 0x00000004 [ 454.434484] CM = 0, WnR = 0 [ 454.437404] user pgtable: 4k pages, 48-bit VAs, pgdp=000000000c924000 [ 454.443800] [0000000000000150] pgd=0000000000000000, p4d=0000000000000000 [ 454.450528] Internal error: Oops: 96000004 [#1] PREEMPT SMP [ 454.456036] Modules linked in: [ 454.459053] CPU: 1 PID: 267 Comm: kvm-vcpu-0 Not tainted 5.18.0-rc4 #113 [ 454.465697] Hardware name: Hardkernel ODROID-C4 (DT) [ 454.470612] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 454.477512] pc : kvm_pmu_event_mask.isra.0+0x14/0x74 [ 454.482427] lr : kvm_pmu_set_counter_event_type+0x2c/0x80 [ 454.487775] sp : ffff80000a9839c0 [ 454.491050] x29: ffff80000a9839c0 x28: ffff000000a83a00 x27: 0000000000000000 [ 454.498127] x26: 0000000000000000 x25: 0000000000000000 x24: ffff00000a510000 [ 454.505198] x23: ffff000000a83a00 x22: ffff000003b01000 x21: 0000000000000000 [ 454.512271] x20: 000000000000001f x19: 00000000000003ff x18: 0000000000000000 [ 454.519343] x17: 000000008003fe98 x16: 0000000000000000 x15: 0000000000000000 [ 454.526416] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 [ 454.533489] x11: 000000008003fdbc x10: 0000000000009d20 x9 : 000000000000001b [ 454.540561] x8 : 0000000000000000 x7 : 0000000000000d00 x6 : 0000000000009d00 [ 454.547633] x5 : 0000000000000037 x4 : 0000000000009d00 x3 : 0d09000000000000 [ 454.554705] x2 : 000000000000001f x1 : 0000000000000000 x0 : 0000000000000000 [ 454.561779] Call trace: [ 454.564191] kvm_pmu_event_mask.isra.0+0x14/0x74 [ 454.568764] kvm_pmu_set_counter_event_type+0x2c/0x80 [ 454.573766] access_pmu_evtyper+0x128/0x170 [ 454.577905] perform_access+0x34/0x80 [ 454.581527] kvm_handle_cp_32+0x13c/0x160 [ 454.585495] kvm_handle_cp15_32+0x1c/0x30 [ 454.589462] handle_exit+0x70/0x180 [ 454.592912] kvm_arch_vcpu_ioctl_run+0x1c4/0x5e0 [ 454.597485] kvm_vcpu_ioctl+0x23c/0x940 [ 454.601280] __arm64_sys_ioctl+0xa8/0xf0 [ 454.605160] invoke_syscall+0x48/0x114 [ 454.608869] el0_svc_common.constprop.0+0xd4/0xfc [ 454.613527] do_el0_svc+0x28/0x90 [ 454.616803] el0_svc+0x34/0xb0 [ 454.619822] el0t_64_sync_handler+0xa4/0x130 [ 454.624049] el0t_64_sync+0x18c/0x190 [ 454.627675] Code: a9be7bfd 910003fd f9000bf3 52807ff3 (b9415001) [ 454.633714] ---[ end trace 0000000000000000 ]--- In this particular case, Linux hasn't detected the presence of a hardware PMU because the PMU node is missing from the DTB, so userspace would have been unable to set the VCPU PMU feature even if it attempted it. What happens is that the 32-bit guest reads ID_DFR0, which advertises the presence of the PMU, and when it tries to program a counter, it triggers the NULL pointer dereference because kvm->arch.arm_pmu is NULL. kvm-arch.arm_pmu was introduced by commit 46b1878 ("KVM: arm64: Keep a per-VM pointer to the default PMU"). Until that commit, this error would be triggered instead: [ 73.388140] ------------[ cut here ]------------ [ 73.388189] Unknown PMU version 0 [ 73.390420] WARNING: CPU: 1 PID: 264 at arch/arm64/kvm/pmu-emul.c:36 kvm_pmu_event_mask.isra.0+0x6c/0x74 [ 73.399821] Modules linked in: [ 73.402835] CPU: 1 PID: 264 Comm: kvm-vcpu-0 Not tainted 5.17.0 #114 [ 73.409132] Hardware name: Hardkernel ODROID-C4 (DT) [ 73.414048] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 73.420948] pc : kvm_pmu_event_mask.isra.0+0x6c/0x74 [ 73.425863] lr : kvm_pmu_event_mask.isra.0+0x6c/0x74 [ 73.430779] sp : ffff80000a8db9b0 [ 73.434055] x29: ffff80000a8db9b0 x28: ffff000000dbaac0 x27: 0000000000000000 [ 73.441131] x26: ffff000000dbaac0 x25: 00000000c600000d x24: 0000000000180720 [ 73.448203] x23: ffff800009ffbe10 x22: ffff00000b612000 x21: 0000000000000000 [ 73.455276] x20: 000000000000001f x19: 0000000000000000 x18: ffffffffffffffff [ 73.462348] x17: 000000008003fe98 x16: 0000000000000000 x15: 0720072007200720 [ 73.469420] x14: 0720072007200720 x13: ffff800009d32488 x12: 00000000000004e6 [ 73.476493] x11: 00000000000001a2 x10: ffff800009d32488 x9 : ffff800009d32488 [ 73.483565] x8 : 00000000ffffefff x7 : ffff800009d8a488 x6 : ffff800009d8a488 [ 73.490638] x5 : ffff0000f461a9d8 x4 : 0000000000000000 x3 : 0000000000000001 [ 73.497710] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000000dbaac0 [ 73.504784] Call trace: [ 73.507195] kvm_pmu_event_mask.isra.0+0x6c/0x74 [ 73.511768] kvm_pmu_set_counter_event_type+0x2c/0x80 [ 73.516770] access_pmu_evtyper+0x128/0x16c [ 73.520910] perform_access+0x34/0x80 [ 73.524532] kvm_handle_cp_32+0x13c/0x160 [ 73.528500] kvm_handle_cp15_32+0x1c/0x30 [ 73.532467] handle_exit+0x70/0x180 [ 73.535917] kvm_arch_vcpu_ioctl_run+0x20c/0x6e0 [ 73.540489] kvm_vcpu_ioctl+0x2b8/0x9e0 [ 73.544283] __arm64_sys_ioctl+0xa8/0xf0 [ 73.548165] invoke_syscall+0x48/0x114 [ 73.551874] el0_svc_common.constprop.0+0xd4/0xfc [ 73.556531] do_el0_svc+0x28/0x90 [ 73.559808] el0_svc+0x28/0x80 [ 73.562826] el0t_64_sync_handler+0xa4/0x130 [ 73.567054] el0t_64_sync+0x1a0/0x1a4 [ 73.570676] ---[ end trace 0000000000000000 ]--- [ 73.575382] kvm: pmu event creation failed -2 The root cause remains the same: kvm->arch.pmuver was never set to something sensible because the VCPU feature itself was never set. The odroid-c4 is somewhat of a special case, because Linux doesn't probe the PMU. But the above errors can easily be reproduced on any hardware, with or without a PMU driver, as long as userspace doesn't set the PMU feature. Work around the fact that KVM advertises a PMU even when the VCPU feature is not set by gating all PMU emulation on the feature. The guest can still access the registers without KVM injecting an undefined exception. Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20220425145530.723858-1-alexandru.elisei@arm.com
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Dear developers.
Thank you for your efforts in Raspbian.
Could you pls invoke the DVB USB option IT913X in the kernel, and add the module dvb-usb-it913x and firmwares dvb-usb-it913x-01.fw and dvb-usb-it913x-02.fw in the lib/firmware directory.
That would really help me in my quest to build a home TV server.
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