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2020-09-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller
Two minor conflicts: 1) net/ipv4/route.c, adding a new local variable while moving another local variable and removing it's initial assignment. 2) drivers/net/dsa/microchip/ksz9477.c, overlapping changes. One pretty prints the port mode differently, whilst another changes the driver to try and obtain the port mode from the port node rather than the switch node. Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm fixes from Paolo Bonzini: "ARM: - fix fault on page table writes during instruction fetch s390: - doc improvement x86: - The obvious patches are always the ones that turn out to be completely broken. /me hangs his head in shame" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: Revert "KVM: Check the allocation of pv cpu mask" KVM: arm64: Remove S1PTW check from kvm_vcpu_dabt_iswrite() KVM: arm64: Assume write fault on S1PTW permission fault on instruction fetch docs: kvm: add documentation for KVM_CAP_S390_DIAG318
2020-09-20Merge tag 'kvmarm-fixes-5.9-2' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master KVM/arm64 fixes for 5.9, take #2 - Fix handling of S1 Page Table Walk permission fault at S2 on instruction fetch - Cleanup kvm_vcpu_dabt_iswrite()
2020-09-18Merge tag 'arm64-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Catalin Marinas: - Allow CPUs affected by erratum 1418040 to come online late (previously we only fixed the other case - CPUs not affected by the erratum coming up late). - Fix branch offset in BPF JIT. - Defer the stolen time initialisation to the CPU online time from the CPU starting time to avoid a (sleep-able) memory allocation in an atomic context. * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: paravirt: Initialize steal time when cpu is online arm64: bpf: Fix branch offset in JIT arm64: Allow CPUs unffected by ARM erratum 1418040 to come in late
2020-09-18KVM: arm64: Remove S1PTW check from kvm_vcpu_dabt_iswrite()Marc Zyngier
Now that kvm_vcpu_trap_is_write_fault() checks for S1PTW, there is no need for kvm_vcpu_dabt_iswrite() to do the same thing, as we already check for this condition on all existing paths. Drop the check and add a comment instead. Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20200915104218.1284701-3-maz@kernel.org
2020-09-18KVM: arm64: Assume write fault on S1PTW permission fault on instruction fetchMarc Zyngier
KVM currently assumes that an instruction abort can never be a write. This is in general true, except when the abort is triggered by a S1PTW on instruction fetch that tries to update the S1 page tables (to set AF, for example). This can happen if the page tables have been paged out and brought back in without seeing a direct write to them (they are thus marked read only), and the fault handling code will make the PT executable(!) instead of writable. The guest gets stuck forever. In these conditions, the permission fault must be considered as a write so that the Stage-1 update can take place. This is essentially the I-side equivalent of the problem fixed by 60e21a0ef54c ("arm64: KVM: Take S1 walks into account when determining S2 write faults"). Update kvm_is_write_fault() to return true on IABT+S1PTW, and introduce kvm_vcpu_trap_is_exec_fault() that only return true when no faulting on a S1 fault. Additionally, kvm_vcpu_dabt_iss1tw() is renamed to kvm_vcpu_abt_iss1tw(), as the above makes it plain that it isn't specific to data abort. Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Will Deacon <will@kernel.org> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20200915104218.1284701-2-maz@kernel.org
2020-09-17arm64: paravirt: Initialize steal time when cpu is onlineAndrew Jones
Steal time initialization requires mapping a memory region which invokes a memory allocation. Doing this at CPU starting time results in the following trace when CONFIG_DEBUG_ATOMIC_SLEEP is enabled: BUG: sleeping function called from invalid context at mm/slab.h:498 in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 0, name: swapper/1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.9.0-rc5+ #1 Call trace: dump_backtrace+0x0/0x208 show_stack+0x1c/0x28 dump_stack+0xc4/0x11c ___might_sleep+0xf8/0x130 __might_sleep+0x58/0x90 slab_pre_alloc_hook.constprop.101+0xd0/0x118 kmem_cache_alloc_node_trace+0x84/0x270 __get_vm_area_node+0x88/0x210 get_vm_area_caller+0x38/0x40 __ioremap_caller+0x70/0xf8 ioremap_cache+0x78/0xb0 memremap+0x9c/0x1a8 init_stolen_time_cpu+0x54/0xf0 cpuhp_invoke_callback+0xa8/0x720 notify_cpu_starting+0xc8/0xd8 secondary_start_kernel+0x114/0x180 CPU1: Booted secondary processor 0x0000000001 [0x431f0a11] However we don't need to initialize steal time at CPU starting time. We can simply wait until CPU online time, just sacrificing a bit of accuracy by returning zero for steal time until we know better. While at it, add __init to the functions that are only called by pv_time_init() which is __init. Signed-off-by: Andrew Jones <drjones@redhat.com> Fixes: e0685fa228fd ("arm64: Retrieve stolen time as paravirtualized guest") Cc: stable@vger.kernel.org Reviewed-by: Steven Price <steven.price@arm.com> Link: https://lore.kernel.org/r/20200916154530.40809-1-drjones@redhat.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-09-17arm64: bpf: Fix branch offset in JITIlias Apalodimas
Running the eBPF test_verifier leads to random errors looking like this: [ 6525.735488] Unexpected kernel BRK exception at EL1 [ 6525.735502] Internal error: ptrace BRK handler: f2000100 [#1] SMP [ 6525.741609] Modules linked in: nls_utf8 cifs libdes libarc4 dns_resolver fscache binfmt_misc nls_ascii nls_cp437 vfat fat aes_ce_blk crypto_simd cryptd aes_ce_cipher ghash_ce gf128mul efi_pstore sha2_ce sha256_arm64 sha1_ce evdev efivars efivarfs ip_tables x_tables autofs4 btrfs blake2b_generic xor xor_neon zstd_compress raid6_pq libcrc32c crc32c_generic ahci xhci_pci libahci xhci_hcd igb libata i2c_algo_bit nvme realtek usbcore nvme_core scsi_mod t10_pi netsec mdio_devres of_mdio gpio_keys fixed_phy libphy gpio_mb86s7x [ 6525.787760] CPU: 3 PID: 7881 Comm: test_verifier Tainted: G W 5.9.0-rc1+ #47 [ 6525.796111] Hardware name: Socionext SynQuacer E-series DeveloperBox, BIOS build #1 Jun 6 2020 [ 6525.804812] pstate: 20000005 (nzCv daif -PAN -UAO BTYPE=--) [ 6525.810390] pc : bpf_prog_c3d01833289b6311_F+0xc8/0x9f4 [ 6525.815613] lr : bpf_prog_d53bb52e3f4483f9_F+0x38/0xc8c [ 6525.820832] sp : ffff8000130cbb80 [ 6525.824141] x29: ffff8000130cbbb0 x28: 0000000000000000 [ 6525.829451] x27: 000005ef6fcbf39b x26: 0000000000000000 [ 6525.834759] x25: ffff8000130cbb80 x24: ffff800011dc7038 [ 6525.840067] x23: ffff8000130cbd00 x22: ffff0008f624d080 [ 6525.845375] x21: 0000000000000001 x20: ffff800011dc7000 [ 6525.850682] x19: 0000000000000000 x18: 0000000000000000 [ 6525.855990] x17: 0000000000000000 x16: 0000000000000000 [ 6525.861298] x15: 0000000000000000 x14: 0000000000000000 [ 6525.866606] x13: 0000000000000000 x12: 0000000000000000 [ 6525.871913] x11: 0000000000000001 x10: ffff8000000a660c [ 6525.877220] x9 : ffff800010951810 x8 : ffff8000130cbc38 [ 6525.882528] x7 : 0000000000000000 x6 : 0000009864cfa881 [ 6525.887836] x5 : 00ffffffffffffff x4 : 002880ba1a0b3e9f [ 6525.893144] x3 : 0000000000000018 x2 : ffff8000000a4374 [ 6525.898452] x1 : 000000000000000a x0 : 0000000000000009 [ 6525.903760] Call trace: [ 6525.906202] bpf_prog_c3d01833289b6311_F+0xc8/0x9f4 [ 6525.911076] bpf_prog_d53bb52e3f4483f9_F+0x38/0xc8c [ 6525.915957] bpf_dispatcher_xdp_func+0x14/0x20 [ 6525.920398] bpf_test_run+0x70/0x1b0 [ 6525.923969] bpf_prog_test_run_xdp+0xec/0x190 [ 6525.928326] __do_sys_bpf+0xc88/0x1b28 [ 6525.932072] __arm64_sys_bpf+0x24/0x30 [ 6525.935820] el0_svc_common.constprop.0+0x70/0x168 [ 6525.940607] do_el0_svc+0x28/0x88 [ 6525.943920] el0_sync_handler+0x88/0x190 [ 6525.947838] el0_sync+0x140/0x180 [ 6525.951154] Code: d4202000 d4202000 d4202000 d4202000 (d4202000) [ 6525.957249] ---[ end trace cecc3f93b14927e2 ]--- The reason is the offset[] creation and later usage, while building the eBPF body. The code currently omits the first instruction, since build_insn() will increase our ctx->idx before saving it. That was fine up until bounded eBPF loops were introduced. After that introduction, offset[0] must be the offset of the end of prologue which is the start of the 1st insn while, offset[n] holds the offset of the end of n-th insn. When "taken loop with back jump to 1st insn" test runs, it will eventually call bpf2a64_offset(-1, 2, ctx). Since negative indexing is permitted, the current outcome depends on the value stored in ctx->offset[-1], which has nothing to do with our array. If the value happens to be 0 the tests will work. If not this error triggers. commit 7c2e988f400e ("bpf: fix x64 JIT code generation for jmp to 1st insn") fixed an indentical bug on x86 when eBPF bounded loops were introduced. So let's fix it by creating the ctx->offset[] differently. Track the beginning of instruction and account for the extra instruction while calculating the arm instruction offsets. Fixes: 2589726d12a1 ("bpf: introduce bounded loops") Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Reported-by: Jiri Olsa <jolsa@kernel.org> Co-developed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Co-developed-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com> Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com> Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20200917084925.177348-1-ilias.apalodimas@linaro.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-09-14arm64: dts: mt7622: add mt7531 dsa to bananapi-bpi-r64 boardLanden Chao
Add mt7531 dsa to bananapi-bpi-r64 board for 5 giga Ethernet ports support. Signed-off-by: Landen Chao <landen.chao@mediatek.com> Tested-By: Frank Wunderlich <frank-w@public-files.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-14arm64: dts: mt7622: add mt7531 dsa to mt7622-rfb1 boardLanden Chao
Add mt7531 dsa to mt7622-rfb1 board for 5 giga Ethernet ports support. mt7622 only supports 1 sgmii interface, so either gmac0 or gmac1 can be configured as sgmii interface. In this patch, change to connect mt7622 gmac0 and mt7531 port6 through sgmii interface. Signed-off-by: Landen Chao <landen.chao@mediatek.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-13Merge tag 'armsoc-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc Pull ARM SoC fixes from Olof Johansson: "A collection of fixes I've been accruing over the last few weeks, none of them have been severe enough to warrant flushing the queue but it's been long enough now that it's a good idea to send them in. A handful of them are fixups for QSPI DT/bindings/compatibles, some smaller fixes for system DMA clock control and TMU interrupts on i.MX, a handful of fixes for OMAP, including a fix for DSI (display) on omap5" * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (27 commits) arm64: dts: ns2: Fixed QSPI compatible string ARM: dts: BCM5301X: Fixed QSPI compatible string ARM: dts: NSP: Fixed QSPI compatible string ARM: dts: bcm: HR2: Fixed QSPI compatible string dt-bindings: spi: Fix spi-bcm-qspi compatible ordering ARM: dts: imx6sx: fix the pad QSPI1B_SCLK mux mode for uart3 arm64: dts: imx8mp: correct sdma1 clk setting arm64: dts: imx8mq: Fix TMU interrupt property ARM: dts: imx7d-zii-rmu2: fix rgmii phy-mode for ksz9031 phy ARM: dts: vfxxx: Add syscon compatible with OCOTP ARM: dts: imx6q-logicpd: Fix broken PWM arm64: dts: imx: Add missing imx8mm-beacon-kit.dtb to build ARM: dts: imx6q-prtwd2: Remove unneeded i2c unit name ARM: dts: imx6qdl-gw51xx: Remove unneeded #address-cells/#size-cells ARM: dts: imx7ulp: Correct gpio ranges ARM: dts: ls1021a: fix QuadSPI-memory reg range arm64: defconfig: Enable ptn5150 extcon driver arm64: defconfig: Enable USB gadget with configfs ARM: configs: Update Integrator defconfig ARM: dts: omap5: Fix DSI base address and clocks ...
2020-09-13Merge tag 'arm-soc/for-5.9/devicetree-fixes' of ↵Olof Johansson
https://github.com/Broadcom/stblinux into arm/fixes This pull request contains Broadcom ARM-based SoCs Device Tree fixes for 5.9, please pull the following: - Florian fixes the Broadcom QSPI controller binding such that the most specific compatible string is the left most one, and all existing in-tree users are updated as well. * tag 'arm-soc/for-5.9/devicetree-fixes' of https://github.com/Broadcom/stblinux: arm64: dts: ns2: Fixed QSPI compatible string ARM: dts: BCM5301X: Fixed QSPI compatible string ARM: dts: NSP: Fixed QSPI compatible string ARM: dts: bcm: HR2: Fixed QSPI compatible string dt-bindings: spi: Fix spi-bcm-qspi compatible ordering Link: https://lore.kernel.org/r/20200909211857.4144718-1-f.fainelli@gmail.com Signed-off-by: Olof Johansson <olof@lixom.net>
2020-09-13Merge tag 'imx-fixes-5.9-2' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/fixes i.MX fixes for 5.9, round 2: - Fix the misspelling of 'interrupts' property in i.MX8MQ TMU DT node. - Correct 'ahb' clock for i.MX8MP SDMA1 in device tree. - Fix pad QSPI1B_SCLK mux mode for UART3 on i.MX6SX. * tag 'imx-fixes-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux: ARM: dts: imx6sx: fix the pad QSPI1B_SCLK mux mode for uart3 arm64: dts: imx8mp: correct sdma1 clk setting arm64: dts: imx8mq: Fix TMU interrupt property Link: https://lore.kernel.org/r/20200909143844.GA25109@dragon Signed-off-by: Olof Johansson <olof@lixom.net>
2020-09-13Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm fixes from Paolo Bonzini: "A bit on the bigger side, mostly due to me being on vacation, then busy, then on parental leave, but there's nothing worrisome. ARM: - Multiple stolen time fixes, with a new capability to match x86 - Fix for hugetlbfs mappings when PUD and PMD are the same level - Fix for hugetlbfs mappings when PTE mappings are enforced (dirty logging, for example) - Fix tracing output of 64bit values x86: - nSVM state restore fixes - Async page fault fixes - Lots of small fixes everywhere" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (25 commits) KVM: emulator: more strict rsm checks. KVM: nSVM: more strict SMM checks when returning to nested guest SVM: nSVM: setup nested msr permission bitmap on nested state load SVM: nSVM: correctly restore GIF on vmexit from nesting after migration x86/kvm: don't forget to ACK async PF IRQ x86/kvm: properly use DEFINE_IDTENTRY_SYSVEC() macro KVM: VMX: Don't freeze guest when event delivery causes an APIC-access exit KVM: SVM: avoid emulation with stale next_rip KVM: x86: always allow writing '0' to MSR_KVM_ASYNC_PF_EN KVM: SVM: Periodically schedule when unregistering regions on destroy KVM: MIPS: Change the definition of kvm type kvm x86/mmu: use KVM_REQ_MMU_SYNC to sync when needed KVM: nVMX: Fix the update value of nested load IA32_PERF_GLOBAL_CTRL control KVM: fix memory leak in kvm_io_bus_unregister_dev() KVM: Check the allocation of pv cpu mask KVM: nVMX: Update VMCS02 when L2 PAE PDPTE updates detected KVM: arm64: Update page shift if stage 2 block mapping not supported KVM: arm64: Fix address truncation in traces KVM: arm64: Do not try to map PUDs when they are folded into PMD arm64/x86: KVM: Introduce steal-time cap ...
2020-09-13arm64: Allow CPUs unffected by ARM erratum 1418040 to come in lateMarc Zyngier
Now that we allow CPUs affected by erratum 1418040 to come in late, this prevents their unaffected sibblings from coming in late (or coming back after a suspend or hotplug-off, which amounts to the same thing). To allow this, we need to add ARM64_CPUCAP_OPTIONAL_FOR_LATE_CPU, which amounts to set .type to ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE. Fixes: bf87bb0881d0 ("arm64: Allow booting of late CPUs affected by erratum 1418040") Reported-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> Tested-by: Matthias Kaehlcke <mka@chromium.org> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20200911181611.2073183-1-maz@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-09-11Merge tag 'kvmarm-fixes-5.9-1' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD KVM/arm64 fixes for Linux 5.9, take #1 - Multiple stolen time fixes, with a new capability to match x86 - Fix for hugetlbfs mappings when PUD and PMD are the same level - Fix for hugetlbfs mappings when PTE mappings are enforced (dirty logging, for example) - Fix tracing output of 64bit values
2020-09-10arm64: dts: exynos: Use newer S3FWRN5 GPIO properties in Exynos5433 TM2Krzysztof Kozlowski
Since "s3fwrn5" is not a valid vendor prefix, use new GPIO properties instead of the deprecated. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-09arm64: dts: ns2: Fixed QSPI compatible stringFlorian Fainelli
The string was incorrectly defined before from least to most specific, swap the compatible strings accordingly. Fixes: ff73917d38a6 ("ARM64: dts: Add QSPI Device Tree node for NS2") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2020-09-05arm64: dts: imx8mp: correct sdma1 clk settingRobin Gong
Correct sdma1 ahb clk, otherwise wrong 1:1 clk ratio will be chosed so that sdma1 function broken. sdma1 should use 1:2 clk, while sdma2/3 use 1:1. Fixes: 6d9b8d20431f ("arm64: dts: freescale: Add i.MX8MP dtsi support") Cc: <stable@vger.kernel.org> Signed-off-by: Robin Gong <yibin.gong@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2020-09-04Merge tag 'arm64-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Catalin Marinas: - Fix the loading of modules built with binutils-2.35. This version produces writable and executable .text.ftrace_trampoline section which is rejected by the kernel. - Remove the exporting of cpu_logical_map() as the Tegra driver has now been fixed and no longer uses this function. * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64/module: set trampoline section flags regardless of CONFIG_DYNAMIC_FTRACE arm64: Remove exporting cpu_logical_map symbol
2020-09-04KVM: arm64: Update page shift if stage 2 block mapping not supportedAlexandru Elisei
Commit 196f878a7ac2e (" KVM: arm/arm64: Signal SIGBUS when stage2 discovers hwpoison memory") modifies user_mem_abort() to send a SIGBUS signal when the fault IPA maps to a hwpoisoned page. Commit 1559b7583ff6 ("KVM: arm/arm64: Re-check VMA on detecting a poisoned page") changed kvm_send_hwpoison_signal() to use the page shift instead of the VMA because at that point the code had already released the mmap lock, which means userspace could have modified the VMA. If userspace uses hugetlbfs for the VM memory, user_mem_abort() tries to map the guest fault IPA using block mappings in stage 2. That is not always possible, if, for example, userspace uses dirty page logging for the VM. Update the page shift appropriately in those cases when we downgrade the stage 2 entry from a block mapping to a page. Fixes: 1559b7583ff6 ("KVM: arm/arm64: Re-check VMA on detecting a poisoned page") Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Gavin Shan <gshan@redhat.com> Link: https://lore.kernel.org/r/20200901133357.52640-2-alexandru.elisei@arm.com
2020-09-04KVM: arm64: Fix address truncation in tracesMarc Zyngier
Owing to their ARMv7 origins, the trace events are truncating most address values to 32bits. That's not really helpful. Expand the printing of such values to their full glory. Signed-off-by: Marc Zyngier <maz@kernel.org>
2020-09-04KVM: arm64: Do not try to map PUDs when they are folded into PMDMarc Zyngier
For the obscure cases where PMD and PUD are the same size (64kB pages with 42bit VA, for example, which results in only two levels of page tables), we can't map anything as a PUD, because there is... erm... no PUD to speak of. Everything is either a PMD or a PTE. So let's only try and map a PUD when its size is different from that of a PMD. Cc: stable@vger.kernel.org Fixes: b8e0ba7c8bea ("KVM: arm64: Add support for creating PUD hugepages at stage 2") Reported-by: Gavin Shan <gshan@redhat.com> Reported-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Tested-by: Gavin Shan <gshan@redhat.com> Tested-by: Eric Auger <eric.auger@redhat.com> Tested-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org>
2020-09-02arm64/module: set trampoline section flags regardless of CONFIG_DYNAMIC_FTRACEJessica Yu
In the arm64 module linker script, the section .text.ftrace_trampoline is specified unconditionally regardless of whether CONFIG_DYNAMIC_FTRACE is enabled (this is simply due to the limitation that module linker scripts are not preprocessed like the vmlinux one). Normally, for .plt and .text.ftrace_trampoline, the section flags present in the module binary wouldn't matter since module_frob_arch_sections() would assign them manually anyway. However, the arm64 module loader only sets the section flags for .text.ftrace_trampoline when CONFIG_DYNAMIC_FTRACE=y. That's only become problematic recently due to a recent change in binutils-2.35, where the .text.ftrace_trampoline section (along with the .plt section) is now marked writable and executable (WAX). We no longer allow writable and executable sections to be loaded due to commit 5c3a7db0c7ec ("module: Harden STRICT_MODULE_RWX"), so this is causing all modules linked with binutils-2.35 to be rejected under arm64. Drop the IS_ENABLED(CONFIG_DYNAMIC_FTRACE) check in module_frob_arch_sections() so that the section flags for .text.ftrace_trampoline get properly set to SHF_EXECINSTR|SHF_ALLOC, without SHF_WRITE. Signed-off-by: Jessica Yu <jeyu@kernel.org> Acked-by: Will Deacon <will@kernel.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: http://lore.kernel.org/r/20200831094651.GA16385@linux-8ccs Link: https://lore.kernel.org/r/20200901160016.3646-1-jeyu@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-09-02arm64: Remove exporting cpu_logical_map symbolSudeep Holla
Commit eaecca9e7710 ("arm64: Fix __cpu_logical_map undefined issue") exported cpu_logical_map in order to fix tegra194-cpufreq module build failure. As this might potentially cause problem while supporting physical CPU hotplug, tegra194-cpufreq module was reworded to avoid use of cpu_logical_map() via the commit 93d0c1ab2328 ("cpufreq: replace cpu_logical_map() with read_cpuid_mpir()") Since cpu_logical_map was exported to fix the module build temporarily, let us remove the same before it gains any user again. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Link: https://lore.kernel.org/r/20200901095229.56793-1-sudeep.holla@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-08-31Merge tag 'mmc-v5.9-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc Pull MMC fixes from Ulf Hansson: - Fix HS400 tuning for ACPI ID AMDI0040 - Fix reset of CQHCI for Intel GLK-based controllers - Use correct timeout clock for Tegra186/194/210 - Fix eMMC mounting on mt7622/Bpi-64 * tag 'mmc-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: sdhci: tegra: Add missing TMCLK for data timeout arm64: tegra: Add missing timeout clock to Tegra194 SDMMC nodes arm64: tegra: Add missing timeout clock to Tegra186 SDMMC nodes arm64: tegra: Add missing timeout clock to Tegra210 SDMMC dt-bindings: mmc: tegra: Add tmclk for Tegra210 and later sdhci: tegra: Remove SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK for Tegra186 sdhci: tegra: Remove SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK for Tegra210 arm64: dts: mt7622: add reset node for mmc device dt-bindings: mmc: Add missing description for clk_in/out_sd1 mmc: mediatek: add optional module reset property mmc: dt-bindings: Add resets/reset-names for Mediatek MMC bindings mmc: sdhci-pci: Fix SDHCI_RESET_ALL for CQHCI for Intel GLK-based controllers mmc: sdhci-acpi: Fix HS400 tuning for AMDI0040
2020-08-31arm64: dts: imx8mq: Fix TMU interrupt propertyKrzysztof Kozlowski
"interrupt" is not a valid property. Using proper name fixes dtbs_check warning: arch/arm64/boot/dts/freescale/imx8mq-zii-ultra-zest.dt.yaml: tmu@30260000: 'interrupts' is a required property Fixes: e464fd2ba4d4 ("arm64: dts: imx8mq: enable the multi sensor TMU") Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2020-08-30Merge tag 'irq-urgent-2020-08-30' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fixes from Thomas Gleixner: "A set of fixes for interrupt chip drivers: - Revert the platform driver conversion of interrupt chip drivers as it turned out to create more problems than it solves. - Fix a trivial typo in the new module helpers which made probing reliably fail. - Small fixes in the STM32 and MIPS Ingenic drivers - The TI firmware rework which had badly managed dependencies and had to wait post rc1" * tag 'irq-urgent-2020-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/ingenic: Leave parent IRQ unmasked on suspend irqchip/stm32-exti: Avoid losing interrupts due to clearing pending bits by mistake irqchip: Revert modular support for drivers using IRQCHIP_PLATFORM_DRIVER helperse irqchip: Fix probing deferal when using IRQCHIP_PLATFORM_DRIVER helpers arm64: dts: k3-am65: Update the RM resource types arm64: dts: k3-am65: ti-sci-inta/intr: Update to latest bindings arm64: dts: k3-j721e: ti-sci-inta/intr: Update to latest bindings irqchip/ti-sci-inta: Add support for INTA directly connecting to GIC irqchip/ti-sci-inta: Do not store TISCI device id in platform device id field dt-bindings: irqchip: Convert ti, sci-inta bindings to yaml dt-bindings: irqchip: ti, sci-inta: Update docs to support different parent. irqchip/ti-sci-intr: Add support for INTR being a parent to INTR dt-bindings: irqchip: Convert ti, sci-intr bindings to yaml dt-bindings: irqchip: ti, sci-intr: Update bindings to drop the usage of gic as parent firmware: ti_sci: Add support for getting resource with subtype firmware: ti_sci: Drop unused structure ti_sci_rm_type_map firmware: ti_sci: Drop the device id to resource type translation
2020-08-30Merge tag 'locking-urgent-2020-08-30' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fixes from Thomas Gleixner: "A set of fixes for lockdep, tracing and RCU: - Prevent recursion by using raw_cpu_* operations - Fixup the interrupt state in the cpu idle code to be consistent - Push rcu_idle_enter/exit() invocations deeper into the idle path so that the lock operations are inside the RCU watching sections - Move trace_cpu_idle() into generic code so it's called before RCU goes idle. - Handle raw_local_irq* vs. local_irq* operations correctly - Move the tracepoints out from under the lockdep recursion handling which turned out to be fragile and inconsistent" * tag 'locking-urgent-2020-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: lockdep,trace: Expose tracepoints lockdep: Only trace IRQ edges mips: Implement arch_irqs_disabled() arm64: Implement arch_irqs_disabled() nds32: Implement arch_irqs_disabled() locking/lockdep: Cleanup x86/entry: Remove unused THUNKs cpuidle: Move trace_cpu_idle() into generic code cpuidle: Make CPUIDLE_FLAG_TLB_FLUSHED generic sched,idle,rcu: Push rcu_idle deeper into the idle path cpuidle: Fixup IRQ state lockdep: Use raw_cpu_*() for per-cpu variables
2020-08-29Merge tag 'fallthrough-fixes-5.9-rc3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux Pull fallthrough fixes from Gustavo A. R. Silva: "Fix some minor issues introduced by the recent treewide fallthrough conversions: - Fix identation issue - Fix erroneous fallthrough annotation - Remove unnecessary fallthrough annotation - Fix code comment changed by fallthrough conversion" * tag 'fallthrough-fixes-5.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux: arm64/cpuinfo: Remove unnecessary fallthrough annotation media: dib0700: Fix identation issue in dib8096_set_param_override() afs: Remove erroneous fallthough annotation iio: dpot-dac: fix code comment in dpot_dac_read_raw()
2020-08-28Merge tag 'arm64-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Catalin Marinas: - Fix kernel build with the integrated LLVM assembler which doesn't see the -Wa,-march option. - Fix "make vdso_install" when COMPAT_VDSO is disabled. - Make KVM more robust if the AT S1E1R instruction triggers an exception (architecture corner cases). * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: KVM: arm64: Set HCR_EL2.PTW to prevent AT taking synchronous exception KVM: arm64: Survive synchronous exceptions caused by AT instructions KVM: arm64: Add kvm_extable for vaxorcism code arm64: vdso32: make vdso32 install conditional arm64: use a common .arch preamble for inline assembly
2020-08-28KVM: arm64: Set HCR_EL2.PTW to prevent AT taking synchronous exceptionJames Morse
AT instructions do a translation table walk and return the result, or the fault in PAR_EL1. KVM uses these to find the IPA when the value is not provided by the CPU in HPFAR_EL1. If a translation table walk causes an external abort it is taken as an exception, even if it was due to an AT instruction. (DDI0487F.a's D5.2.11 "Synchronous faults generated by address translation instructions") While we previously made KVM resilient to exceptions taken due to AT instructions, the device access causes mismatched attributes, and may occur speculatively. Prevent this, by forbidding a walk through memory described as device at stage2. Now such AT instructions will report a stage2 fault. Such a fault will cause KVM to restart the guest. If the AT instructions always walk the page tables, but guest execution uses the translation cached in the TLB, the guest can't make forward progress until the TLB entry is evicted. This isn't a problem, as since commit 5dcd0fdbb492 ("KVM: arm64: Defer guest entry when an asynchronous exception is pending"), KVM will return to the host to process IRQs allowing the rest of the system to keep running. Cc: stable@vger.kernel.org # <v5.3: 5dcd0fdbb492 ("KVM: arm64: Defer guest entry when an asynchronous exception is pending") Signed-off-by: James Morse <james.morse@arm.com> Reviewed-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-08-28KVM: arm64: Survive synchronous exceptions caused by AT instructionsJames Morse
KVM doesn't expect any synchronous exceptions when executing, any such exception leads to a panic(). AT instructions access the guest page tables, and can cause a synchronous external abort to be taken. The arm-arm is unclear on what should happen if the guest has configured the hardware update of the access-flag, and a memory type in TCR_EL1 that does not support atomic operations. B2.2.6 "Possible implementation restrictions on using atomic instructions" from DDI0487F.a lists synchronous external abort as a possible behaviour of atomic instructions that target memory that isn't writeback cacheable, but the page table walker may behave differently. Make KVM robust to synchronous exceptions caused by AT instructions. Add a get_user() style helper for AT instructions that returns -EFAULT if an exception was generated. While KVM's version of the exception table mixes synchronous and asynchronous exceptions, only one of these can occur at each location. Re-enter the guest when the AT instructions take an exception on the assumption the guest will take the same exception. This isn't guaranteed to make forward progress, as the AT instructions may always walk the page tables, but guest execution may use the translation cached in the TLB. This isn't a problem, as since commit 5dcd0fdbb492 ("KVM: arm64: Defer guest entry when an asynchronous exception is pending"), KVM will return to the host to process IRQs allowing the rest of the system to keep running. Cc: stable@vger.kernel.org # <v5.3: 5dcd0fdbb492 ("KVM: arm64: Defer guest entry when an asynchronous exception is pending") Signed-off-by: James Morse <james.morse@arm.com> Reviewed-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-08-28KVM: arm64: Add kvm_extable for vaxorcism codeJames Morse
KVM has a one instruction window where it will allow an SError exception to be consumed by the hypervisor without treating it as a hypervisor bug. This is used to consume asynchronous external abort that were caused by the guest. As we are about to add another location that survives unexpected exceptions, generalise this code to make it behave like the host's extable. KVM's version has to be mapped to EL2 to be accessible on nVHE systems. The SError vaxorcism code is a one instruction window, so has two entries in the extable. Because the KVM code is copied for VHE and nVHE, we end up with four entries, half of which correspond with code that isn't mapped. Signed-off-by: James Morse <james.morse@arm.com> Reviewed-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-08-28arm64: vdso32: make vdso32 install conditionalFrank van der Linden
vdso32 should only be installed if CONFIG_COMPAT_VDSO is enabled, since it's not even supposed to be compiled otherwise, and arm64 builds without a 32bit crosscompiler will fail. Fixes: 8d75785a8142 ("ARM64: vdso32: Install vdso32 from vdso_install") Signed-off-by: Frank van der Linden <fllinden@amazon.com> Cc: stable@vger.kernel.org [5.4+] Link: https://lore.kernel.org/r/20200827234012.19757-1-fllinden@amazon.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-08-28arm64: use a common .arch preamble for inline assemblySami Tolvanen
Commit 7c78f67e9bd9 ("arm64: enable tlbi range instructions") breaks LLVM's integrated assembler, because -Wa,-march is only passed to external assemblers and therefore, the new instructions are not enabled when IAS is used. This change adds a common architecture version preamble, which can be used in inline assembly blocks that contain instructions that require a newer architecture version, and uses it to fix __TLBI_0 and __TLBI_1 with ARM64_TLB_RANGE. Fixes: 7c78f67e9bd9 ("arm64: enable tlbi range instructions") Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Link: https://github.com/ClangBuiltLinux/linux/issues/1106 Link: https://lore.kernel.org/r/20200827203608.1225689-1-samitolvanen@google.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-08-28arm64: tegra: Add missing timeout clock to Tegra194 SDMMC nodesSowjanya Komatineni
commit 5425fb15d8ee ("arm64: tegra: Add Tegra194 chip device tree") Tegra194 uses separate SDMMC_LEGACY_TM clock for data timeout and this clock is not enabled currently which is not recommended. Tegra194 SDMMC advertises 12Mhz as timeout clock frequency in host capability register. So, this clock should be kept enabled by SDMMC driver. Fixes: 5425fb15d8ee ("arm64: tegra: Add Tegra194 chip device tree") Cc: stable <stable@vger.kernel.org> # 5.4 Tested-by: Jon Hunter <jonathanh@nvidia.com> Reviewed-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com> Link: https://lore.kernel.org/r/1598548861-32373-7-git-send-email-skomatineni@nvidia.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-08-28arm64: tegra: Add missing timeout clock to Tegra186 SDMMC nodesSowjanya Komatineni
commit 39cb62cb8973 ("arm64: tegra: Add Tegra186 support") Tegra186 uses separate SDMMC_LEGACY_TM clock for data timeout and this clock is not enabled currently which is not recommended. Tegra186 SDMMC advertises 12Mhz as timeout clock frequency in host capability register and uses it by default. So, this clock should be kept enabled by the SDMMC driver. Fixes: 39cb62cb8973 ("arm64: tegra: Add Tegra186 support") Cc: stable <stable@vger.kernel.org> # 5.4 Tested-by: Jon Hunter <jonathanh@nvidia.com> Reviewed-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com> Link: https://lore.kernel.org/r/1598548861-32373-6-git-send-email-skomatineni@nvidia.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-08-28arm64: tegra: Add missing timeout clock to Tegra210 SDMMCSowjanya Komatineni
commit 742af7e7a0a1 ("arm64: tegra: Add Tegra210 support") Tegra210 uses separate SDMMC_LEGACY_TM clock for data timeout and this clock is not enabled currently which is not recommended. Tegra SDMMC advertises 12Mhz as timeout clock frequency in host capability register. So, this clock should be kept enabled by SDMMC driver. Fixes: 742af7e7a0a1 ("arm64: tegra: Add Tegra210 support") Cc: stable <stable@vger.kernel.org> # 5.4 Tested-by: Jon Hunter <jonathanh@nvidia.com> Reviewed-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com> Link: https://lore.kernel.org/r/1598548861-32373-5-git-send-email-skomatineni@nvidia.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-08-28arm64: dts: mt7622: add reset node for mmc deviceWenbin Mei
This commit adds reset node for mmc device. Cc: <stable@vger.kernel.org> # v5.4+ Fixes: 966580ad236e ("mmc: mediatek: add support for MT7622 SoC") Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com> Tested-by: Frank Wunderlich <frank-w@public-files.de> Acked-by: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/20200814014346.6496-3-wenbin.mei@mediatek.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-08-27arm64/cpuinfo: Remove unnecessary fallthrough annotationGustavo A. R. Silva
Fallthrough annotations for consecutive default and case labels are not necessary. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-08-26arm64: Implement arch_irqs_disabled()Peter Zijlstra
Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Link: https://lkml.kernel.org/r/20200821085348.664425120@infradead.org
2020-08-26cpuidle: Move trace_cpu_idle() into generic codePeter Zijlstra
Remove trace_cpu_idle() from the arch_cpu_idle() implementations and put it in the generic code, right before disabling RCU. Gets rid of more trace_*_rcuidle() users. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Marco Elver <elver@google.com> Link: https://lkml.kernel.org/r/20200821085348.428433395@infradead.org
2020-08-24Merge tag 'imx-fixes-5.9' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/fixes i.MX fixes for 5.9: - Fix QuadSPI-memory 'reg' for LS1021A and GPIO 'ranges' for i.MX7ULP pinctrl. - A couple of DTC warning fixes on imx6qdl-gw51xx and imx6q-prtwd2 boards. - Add missing imx8mm-beacon-kit.dtb to dtbs-y for build coverage. - Fix broken PWM settings on imx6q-logicpd board. - Add missing syscon compatible to OCOTP device, so that access to UID is possible. - Fix a network regression on imx7d-zii-rmu2 due to a phy-mode mismatch. * tag 'imx-fixes-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux: ARM: dts: imx7d-zii-rmu2: fix rgmii phy-mode for ksz9031 phy ARM: dts: vfxxx: Add syscon compatible with OCOTP ARM: dts: imx6q-logicpd: Fix broken PWM arm64: dts: imx: Add missing imx8mm-beacon-kit.dtb to build ARM: dts: imx6q-prtwd2: Remove unneeded i2c unit name ARM: dts: imx6qdl-gw51xx: Remove unneeded #address-cells/#size-cells ARM: dts: imx7ulp: Correct gpio ranges ARM: dts: ls1021a: fix QuadSPI-memory reg range Link: https://lore.kernel.org/r/20200824130359.GF12776@dragon Signed-off-by: Olof Johansson <olof@lixom.net>
2020-08-23treewide: Use fallthrough pseudo-keywordGustavo A. R. Silva
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-08-23arm64: dts: imx: Add missing imx8mm-beacon-kit.dtb to buildRob Herring
The imx8mm-beacon-kit.dtb was never added to dtbs-y and wasn't getting built. Fix it. Fixes: 593816fa2f35 ("arm64: dts: imx: Add Beacon i.MX8m-Mini development kit") Cc: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Pengutronix Kernel Team <kernel@pengutronix.de> Cc: Fabio Estevam <festevam@gmail.com> Cc: NXP Linux Team <linux-imx@nxp.com> Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2020-08-22Merge tag 'arm64-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Catalin Marinas: - Allow booting of late secondary CPUs affected by erratum 1418040 (currently they are parked if none of the early CPUs are affected by this erratum). - Add the 32-bit vdso Makefile to the vdso_install rule so that 'make vdso_install' installs the 32-bit compat vdso when it is compiled. - Print a warning that untrusted guests without a CPU erratum workaround (Cortex-A57 832075) may deadlock the affected system. * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: ARM64: vdso32: Install vdso32 from vdso_install KVM: arm64: Print warning when cpu erratum can cause guests to deadlock arm64: Allow booting of late CPUs affected by erratum 1418040 arm64: Move handling of erratum 1418040 into C code
2020-08-22Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm fixes from Paolo Bonzini: - PAE and PKU bugfixes for x86 - selftests fix for new binutils - MMU notifier fix for arm64 * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: arm64: Only reschedule if MMU_NOTIFIER_RANGE_BLOCKABLE is not set KVM: Pass MMU notifier range flags to kvm_unmap_hva_range() kvm: x86: Toggling CR4.PKE does not load PDPTEs in PAE mode kvm: x86: Toggling CR4.SMAP does not load PDPTEs in PAE mode KVM: x86: fix access code passed to gva_to_gpa selftests: kvm: Use a shorter encoding to clear RAX
2020-08-21KVM: arm64: Only reschedule if MMU_NOTIFIER_RANGE_BLOCKABLE is not setWill Deacon
When an MMU notifier call results in unmapping a range that spans multiple PGDs, we end up calling into cond_resched_lock() when crossing a PGD boundary, since this avoids running into RCU stalls during VM teardown. Unfortunately, if the VM is destroyed as a result of OOM, then blocking is not permitted and the call to the scheduler triggers the following BUG(): | BUG: sleeping function called from invalid context at arch/arm64/kvm/mmu.c:394 | in_atomic(): 1, irqs_disabled(): 0, non_block: 1, pid: 36, name: oom_reaper | INFO: lockdep is turned off. | CPU: 3 PID: 36 Comm: oom_reaper Not tainted 5.8.0 #1 | Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 | Call trace: | dump_backtrace+0x0/0x284 | show_stack+0x1c/0x28 | dump_stack+0xf0/0x1a4 | ___might_sleep+0x2bc/0x2cc | unmap_stage2_range+0x160/0x1ac | kvm_unmap_hva_range+0x1a0/0x1c8 | kvm_mmu_notifier_invalidate_range_start+0x8c/0xf8 | __mmu_notifier_invalidate_range_start+0x218/0x31c | mmu_notifier_invalidate_range_start_nonblock+0x78/0xb0 | __oom_reap_task_mm+0x128/0x268 | oom_reap_task+0xac/0x298 | oom_reaper+0x178/0x17c | kthread+0x1e4/0x1fc | ret_from_fork+0x10/0x30 Use the new 'flags' argument to kvm_unmap_hva_range() to ensure that we only reschedule if MMU_NOTIFIER_RANGE_BLOCKABLE is set in the notifier flags. Cc: <stable@vger.kernel.org> Fixes: 8b3405e345b5 ("kvm: arm/arm64: Fix locking for kvm_free_stage2_pgd") Cc: Marc Zyngier <maz@kernel.org> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: James Morse <james.morse@arm.com> Signed-off-by: Will Deacon <will@kernel.org> Message-Id: <20200811102725.7121-3-will@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-08-21KVM: Pass MMU notifier range flags to kvm_unmap_hva_range()Will Deacon
The 'flags' field of 'struct mmu_notifier_range' is used to indicate whether invalidate_range_{start,end}() are permitted to block. In the case of kvm_mmu_notifier_invalidate_range_start(), this field is not forwarded on to the architecture-specific implementation of kvm_unmap_hva_range() and therefore the backend cannot sensibly decide whether or not to block. Add an extra 'flags' parameter to kvm_unmap_hva_range() so that architectures are aware as to whether or not they are permitted to block. Cc: <stable@vger.kernel.org> Cc: Marc Zyngier <maz@kernel.org> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: James Morse <james.morse@arm.com> Signed-off-by: Will Deacon <will@kernel.org> Message-Id: <20200811102725.7121-2-will@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>