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2022-03-29Documentation: KVM: add virtual CPU errata documentationPaolo Bonzini
Add a file to document all the different ways in which the virtual CPU emulation is imperfect. Include an example to show how to document such errata. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Jim Mattson <jmattson@google.com> Reviewed-by: Oliver Upton <oupton@google.com> Message-Id: <20220322110712.222449-3-pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-03-29Documentation: KVM: add separate directories for architecture-specific ↵Paolo Bonzini
documentation ARM already has an arm/ subdirectory, but s390 and x86 do not even though they have a relatively large number of files specific to them. Create new directories in Documentation/virt/kvm for these two architectures as well. While at it, group the API documentation and the developer documentation in the table of contents. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20220322110712.222449-2-pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-03-29Documentation: kvm: include new locksPaolo Bonzini
kvm->mn_invalidate_lock and kvm->slots_arch_lock were not included in the documentation, add them. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20220322110720.222499-3-pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-03-29Documentation: kvm: fixes for locking.rstPaolo Bonzini
Separate the various locks clearly, and include the new names of blocked_vcpu_on_cpu_lock and blocked_vcpu_on_cpu. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20220322110720.222499-2-pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-03-29KVM: x86: Fix clang -Wimplicit-fallthrough in do_host_cpuid()Nathan Chancellor
Clang warns: arch/x86/kvm/cpuid.c:739:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough] default: ^ arch/x86/kvm/cpuid.c:739:2: note: insert 'break;' to avoid fall-through default: ^ break; 1 error generated. Clang is a little more pedantic than GCC, which does not warn when falling through to a case that is just break or return. Clang's version is more in line with the kernel's own stance in deprecated.rst, which states that all switch/case blocks must end in either break, fallthrough, continue, goto, or return. Add the missing break to silence the warning. Fixes: f144c49e8c39 ("KVM: x86: synthesize CPUID leaf 0x80000021h if useful") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Nathan Chancellor <nathan@kernel.org> Message-Id: <20220322152906.112164-1-nathan@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-03-29Merge branches 'clk-sifive' and 'clk-visconti' into clk-nextStephen Boyd
* clk-sifive: clk: sifive: Move all stuff into SoCs header files from C files clk: sifive: Add SoCs prefix in each SoCs-dependent data riscv: dts: Change the macro name of prci in each device node dt-bindings: change the macro name of prci in header files and example clk: sifive: duplicate the macro definitions for the time being * clk-visconti: clk: visconti: prevent array overflow in visconti_clk_register_gates()
2022-03-29Merge branches 'clk-range', 'clk-uniphier', 'clk-apple' and 'clk-qcom' into ↵Stephen Boyd
clk-next - Make clk_set_rate_range() re-evaluate the limits each time - Introduce various clk_set_rate_range() tests - Add clk_drop_range() to drop a previously set range - Support for NCO blocks on Apple SoCs * clk-range: clk: Drop the rate range on clk_put() clk: test: Test clk_set_rate_range on orphan mux clk: Initialize orphan req_rate clk: bcm: rpi: Run some clocks at the minimum rate allowed clk: bcm: rpi: Set a default minimum rate clk: bcm: rpi: Add variant structure clk: Add clk_drop_range clk: Always set the rate on clk_set_range_rate clk: Use clamp instead of open-coding our own clk: Always clamp the rounded rate clk: Enforce that disjoints limits are invalid clk: Introduce Kunit Tests for the framework clk: Fix clk_hw_get_clk() when dev is NULL * clk-uniphier: clk: uniphier: Fix fixed-rate initialization * clk-apple: clk: clk-apple-nco: Allow and fix module building MAINTAINERS: Add clk-apple-nco under ARM/APPLE MACHINE clk: clk-apple-nco: Add driver for Apple NCO dt-bindings: clock: Add Apple NCO * clk-qcom: (61 commits) clk: qcom: gcc-msm8994: Fix gpll4 width dt-bindings: clock: fix dt_binding_check error for qcom,gcc-other.yaml clk: qcom: Add display clock controller driver for SM6125 dt-bindings: clock: add QCOM SM6125 display clock bindings clk: qcom: Fix sorting of SDX_GCC_65 in Makefile and Kconfig clk: qcom: gcc: Add emac GDSC support for SM8150 clk: qcom: gcc: sm8150: Fix some identation issues clk: qcom: gcc: Add UFS_CARD and UFS_PHY GDSCs for SM8150 clk: qcom: gcc: Add PCIe0 and PCIe1 GDSC for SM8150 clk: qcom: clk-rcg2: Update the frac table for pixel clock clk: qcom: clk-rcg2: Update logic to calculate D value for RCG clk: qcom: smd: Add missing MSM8998 RPM clocks clk: qcom: smd: Add missing RPM clocks for msm8992/4 dt-bindings: clock: qcom: rpmcc: Add RPM Modem SubSystem (MSS) clocks clk: qcom: gcc-ipq806x: add CryptoEngine resets dt-bindings: reset: add ipq8064 ce5 resets clk: qcom: gcc-ipq806x: add CryptoEngine clocks dt-bindings: clock: add ipq8064 ce5 clk define clk: qcom: gcc-ipq806x: add additional freq for sdc table clk: qcom: clk-rcg: add clk_rcg_floor_ops ops ...
2022-03-29Merge branches 'clk-starfive', 'clk-ti', 'clk-terminate' and 'clk-cleanup' ↵Stephen Boyd
into clk-next - Audio clks on StarFive JH7100 RISC-V SoC - Terminate arrays with sentinels and make that clearer - Cleanup SPDX tags - Fix typos in comments * clk-starfive: clk: starfive: Add JH7100 audio clock driver clk: starfive: jh7100: Support more clock types clk: starfive: jh7100: Make hw clock implementation reusable dt-bindings: clock: Add starfive,jh7100-audclk bindings dt-bindings: clock: Add JH7100 audio clock definitions clk: starfive: jh7100: Handle audio_div clock properly clk: starfive: jh7100: Don't round divisor up twice * clk-ti: clk: ti: Drop legacy compatibility clocks for dra7 clk: ti: Drop legacy compatibility clocks for am4 clk: ti: Drop legacy compatibility clocks for am3 clk: ti: Update component clocks to use ti_dt_clk_name() clk: ti: Update pll and clockdomain clocks to use ti_dt_clk_name() clk: ti: Add ti_dt_clk_name() helper to use clock-output-names clk: ti: Use clock-output-names for clkctrl clk: ti: Add ti_find_clock_provider() to use clock-output-names clk: ti: Optionally parse IO address from parent clock node clk: ti: Preserve node in ti_dt_clocks_register() clk: ti: Constify clkctrl_name * clk-terminate: clk: actions: Make sentinel elements more obvious clk: clps711x: Terminate clk_div_table with sentinel element clk: hisilicon: Terminate clk_div_table with sentinel element clk: loongson1: Terminate clk_div_table with sentinel element clk: actions: Terminate clk_div_table with sentinel element * clk-cleanup: clk: zynq: Update the parameters to zynq_clk_register_periph_clk clk: zynq: trivial warning fix clk: qcom: sm6125-gcc: fix typos in comments clk: ti: clkctrl: fix typos in comments clk: COMMON_CLK_LAN966X should depend on SOC_LAN966 clk: Use of_device_get_match_data() clk: bcm2835: Remove unused variable clk: tegra: tegra124-emc: Fix missing put_device() call in emc_ensure_emc_driver clk: cleanup comments clk: socfpga: cleanup spdx tags
2022-03-29Merge branches 'clk-mvebu', 'clk-const', 'clk-imx' and 'clk-rockchip' into ↵Stephen Boyd
clk-next - Mark mux table as const in clk-mux - Make the all_lists array const * clk-mvebu: clk: mvebu: use time_is_before_eq_jiffies() instead of open coding it * clk-const: clk: Mark clk_core_evict_parent_cache_subtree() 'target' const clk: Mark 'all_lists' as const clk: pistachio: Declare mux table as const u32[] clk: qcom: Declare mux table as const u32[] clk: mmp: Declare mux tables as const u32[] clk: hisilicon: Remove unnecessary cast of mux table to u32 * clk: mux: Declare u32 *table parameter as const clk: nxp: Declare mux table parameter as const u32 * clk: nxp: Remove unused variable * clk-imx: (28 commits) dt-bindings: clock: drop useless consumer example clk: imx: Select MXC_CLK for i.MX93 clock driver clk: imx: remove redundant re-assignment of pll->base MAINTAINERS: clk: imx: add git tree and dt-bindings files clk: imx: pll14xx: Support dynamic rates clk: imx: pll14xx: Add pr_fmt clk: imx: pll14xx: explicitly return lowest rate clk: imx: pll14xx: name variables after usage clk: imx: pll14xx: consolidate rate calculation clk: imx: pll14xx: Use FIELD_GET/FIELD_PREP clk: imx: pll14xx: Drop wrong shifting clk: imx: pll14xx: Use register defines consistently clk: imx8mp: remove SYS PLL 1/2 clock gates clk: imx8mn: remove SYS PLL 1/2 clock gates clk: imx8mm: remove SYS PLL 1/2 clock gates clk: imx: add i.MX93 clk clk: imx: support fracn gppll clk: imx: add i.MX93 composite clk dt-bindings: clock: add i.MX93 clock definition dt-bindings: clock: Add imx93 clock support ... * clk-rockchip: clk: rockchip: re-add rational best approximation algorithm to the fractional divider clk/rockchip: Use of_device_get_match_data() clk: rockchip: Add CLK_SET_RATE_PARENT to the HDMI reference clock on rk3568 clk: rockchip: drop CLK_SET_RATE_PARENT from dclk_vop* on rk3568 clk: rockchip: Add more PLL rates for rk3568
2022-03-29Merge branches 'clk-xilinx', 'clk-kunit', 'clk-cs2000' and 'clk-renesas' ↵Stephen Boyd
into clk-next - Kunit tests for clk-gate implementation - Convert Cirrus Logic CS2000P driver to regmap, yamlify DT binding and add support for dynamic mode * clk-xilinx: clk: zynqmp: replace warn_once with pr_debug for failed clock ops * clk-kunit: clk: gate: Add some kunit test suites * clk-cs2000: clk: cs2000-cp: convert driver to regmap clk: cs2000-cp: freeze config during register fiddling clk: cs2000-cp: make clock skip setting configurable clk: cs2000-cp: add support for dynamic mode clk: cs2000-cp: Make aux output function controllable dt-bindings: clock: cs2000-cp: document cirrus,dynamic-mode dt-bindings: clock: cs2000-cp: document cirrus,clock-skip flag dt-bindings: clock: cs2000-cp: document aux-output-source dt-bindings: clock: convert cs2000-cp bindings to yaml * clk-renesas: dt-bindings: clock: renesas: Make example 'clocks' parsable clk: rs9: Add Renesas 9-series PCIe clock generator driver clk: fixed-factor: Introduce devm_clk_hw_register_fixed_factor_index() dt-bindings: clk: rs9: Add Renesas 9-series I2C PCIe clock generator clk: renesas: r8a779f0: Add PFC clock clk: renesas: r8a779f0: Add I2C clocks clk: renesas: r8a779f0: Add WDT clock clk: renesas: r8a779f0: Fix RSW2 clock divider clk: renesas: rzg2l-cpg: Add support for RZ/V2L SoC dt-bindings: clock: renesas: Document RZ/V2L SoC dt-bindings: clock: Add R9A07G054 CPG Clock and Reset Definitions clk: renesas: r8a779a0: Add CANFD module clock clk: renesas: r9a07g044: Update multiplier and divider values for PLL2/3 clk: renesas: r8a7799[05]: Add MLP clocks clk: renesas: r8a779f0: Add SYS-DMAC clocks
2022-03-29Merge branches 'clk-microchip', 'clk-si', 'clk-mtk', 'clk-at91' and 'clk-st' ↵Stephen Boyd
into clk-next - Clock configuration on Microchip PolarFire SoCs - Free allocations on probe error in Mediatek clk driver - Modernize Mediatek clk driver by consolidating code * clk-microchip: clk: microchip: Add driver for Microchip PolarFire SoC dt-bindings: clk: microchip: Add Microchip PolarFire host binding * clk-si: clk-si5341: replace snprintf in show functions with sysfs_emit clk: si5341: fix reported clk_rate when output divider is 2 * clk-mtk: (32 commits) clk: mediatek: Warn if clk IDs are duplicated clk: mediatek: mt8195: Implement remove functions clk: mediatek: mt8195: Implement error handling in probe functions clk: mediatek: mt8195: Hook up mtk_clk_simple_remove() clk: mediatek: Unregister clks in mtk_clk_simple_probe() error path clk: mediatek: mtk: Implement error handling in register APIs clk: mediatek: pll: Implement error handling in register API clk: mediatek: mux: Implement error handling in register API clk: mediatek: mux: Reverse check for existing clk to reduce nesting level clk: mediatek: gate: Implement error handling in register API clk: mediatek: cpumux: Implement error handling in register API clk: mediatek: mtk: Clean up included headers clk: mediatek: Add mtk_clk_simple_remove() clk: mediatek: Implement mtk_clk_unregister_composites() API clk: mediatek: Implement mtk_clk_unregister_divider_clks() API clk: mediatek: Implement mtk_clk_unregister_factors() API clk: mediatek: Implement mtk_clk_unregister_fixed_clks() API clk: mediatek: pll: Clean up included headers clk: mediatek: pll: Implement unregister API clk: mediatek: pll: Split definitions into separate header file ... * clk-at91: clk: at91: clk-master: remove dead code clk: at91: sama7g5: fix parents of PDMCs' GCLK clk: at91: sama7g5: Allow MCK1 to be exported and referenced in DT clk: at91: allow setting PMC_AUDIOPINCK clock parents via DT * clk-st: clk: stm32mp1: Add parent_data to ETHRX clock clk: stm32mp1: Split ETHCK_K into separate MUX and GATE clock
2022-03-29clk: zynq: Update the parameters to zynq_clk_register_periph_clkShubhrajyoti Datta
In case there are only one gate or the two_gate is 0 the clk1 clock passed is not used. We are passing 0 which is arm_pll. Pass a invalid clock instead. Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Link: https://lore.kernel.org/r/20220222130903.17235-3-shubhrajyoti.datta@xilinx.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2022-03-29clk: zynq: trivial warning fixShubhrajyoti Datta
Fix the below warning WARNING: Missing a blank line after declarations + int enable = !!(fclk_enable & BIT(i - fclk0)); + zynq_clk_register_fclk(i, clk_output_name[i], Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Link: https://lore.kernel.org/r/20220222130903.17235-2-shubhrajyoti.datta@xilinx.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2022-03-29Revert "KVM: set owner of cpu and vm file operations"David Matlack
This reverts commit 3d3aab1b973b01bd2a1aa46307e94a1380b1d802. Now that the KVM module's lifetime is tied to kvm.users_count, there is no need to also tie it's lifetime to the lifetime of the VM and vCPU file descriptors. Suggested-by: Sean Christopherson <seanjc@google.com> Signed-off-by: David Matlack <dmatlack@google.com> Message-Id: <20220303183328.1499189-3-dmatlack@google.com> Reviewed-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-03-29KVM: Prevent module exit until all VMs are freedDavid Matlack
Tie the lifetime the KVM module to the lifetime of each VM via kvm.users_count. This way anything that grabs a reference to the VM via kvm_get_kvm() cannot accidentally outlive the KVM module. Prior to this commit, the lifetime of the KVM module was tied to the lifetime of /dev/kvm file descriptors, VM file descriptors, and vCPU file descriptors by their respective file_operations "owner" field. This approach is insufficient because references grabbed via kvm_get_kvm() do not prevent closing any of the aforementioned file descriptors. This fixes a long standing theoretical bug in KVM that at least affects async page faults. kvm_setup_async_pf() grabs a reference via kvm_get_kvm(), and drops it in an asynchronous work callback. Nothing prevents the VM file descriptor from being closed and the KVM module from being unloaded before this callback runs. Fixes: af585b921e5d ("KVM: Halt vcpu if page it tries to access is swapped out") Fixes: 3d3aab1b973b ("KVM: set owner of cpu and vm file operations") Cc: stable@vger.kernel.org Suggested-by: Ben Gardon <bgardon@google.com> [ Based on a patch from Ben implemented for Google's kernel. ] Signed-off-by: David Matlack <dmatlack@google.com> Message-Id: <20220303183328.1499189-2-dmatlack@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-03-29Merge branch 'pm-docs'Rafael J. Wysocki
Merge additional power management documentation udates for 5.18-rc1: - Add Intel uncore frequency scaling documentation file to its MAINTAINERS entry (Srinivas Pandruvada). - Clean up the AMD P-state driver documentation (Jan Engelhardt). * pm-docs: Documentation: amd-pstate: grammar and sentence structure updates MAINTAINERS: Add additional file to uncore frequency control
2022-03-29Merge branch 'pm-opp'Rafael J. Wysocki
Merge OPP (Operating Performance Points) changes for 5.18-rc1. * pm-opp: Documentation: EM: Describe new registration method using DT OPP: Add support of "opp-microwatt" for EM registration PM: EM: add macro to set .active_power() callback conditionally OPP: Add "opp-microwatt" supporting code dt-bindings: opp: Add "opp-microwatt" entry in the OPP dt-bindings: power: avs: qcom,cpr: Convert to DT schema arm64: dts: qcom: qcs404: Rename CPU and CPR OPP tables arm64: dts: qcom: msm8996: Rename cluster OPP tables dt-bindings: opp: Convert qcom-nvmem-cpufreq to DT schema dt-bindings: opp: qcom-opp: Convert to DT schema arm64: dts: qcom: msm8996-mtp: Add msm8996 compatible dt-bindings: arm: qcom: Add msm8996 and apq8096 compatibles opp: Expose of-node's name in debugfs
2022-03-29io_uring: fail links if msg-ring doesn't succeeedJens Axboe
We must always call req_set_fail() if the request is failed, otherwise we won't sever links for dependent chains correctly. Fixes: 4f57f06ce218 ("io_uring: add support for IORING_OP_MSG_RING command") Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-03-29drm/panel-edp: Add AUO B133UAN01Matthias Kaehlcke
Add support for the AUO B133UAN01 13.3" WUXGA panel. Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20220324134819.v2.1.I816014b6c62da5a33af5021f3cc35cea66552c00@changeid
2022-03-29Merge tag 'devicetree-fixes-for-5.18-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull devicetree fixes from Rob Herring: - Clean-up missing '/schemas' in $ref paths - Fix MediaTek Vcodec decoder example 'dma-ranges' errors - Expand available values of PBL for snps,dwmac to fix warnings in mediatek-dwmac.yaml example - Fix warnings in MediaTek display bindings * tag 'devicetree-fixes-for-5.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: dt-bindings: Fix missing '/schemas' in $ref paths dt-bindings: media: mediatek,vcodec: Fix addressing cell sizes dt-bindings: net: snps,dwmac: modify available values of PBL dt-bindings: display: mediatek: Fix examples on new bindings dt-bindings: display: mediatek, ovl: Fix 'iommu' required property typo dt-bindings: display: mediatek, mutex: Fix mediatek, gce-events type Revert "dt-bindings: display: mediatek: add ethdr definition for mt8195"
2022-03-29Merge tag 'dma-mapping-5.18' of git://git.infradead.org/users/hch/dma-mappingLinus Torvalds
Pull dma-mapping updates from Christoph Hellwig: - do not zero buffer in set_memory_decrypted (Kirill A. Shutemov) - fix return value of dma-debug __setup handlers (Randy Dunlap) - swiotlb cleanups (Robin Murphy) - remove most remaining users of the pci-dma-compat.h API (Christophe JAILLET) - share the ABI header for the DMA map_benchmark with userspace (Tian Tao) - update the maintainer for DMA MAPPING BENCHMARK (Xiang Chen) - remove CONFIG_DMA_REMAP (me) * tag 'dma-mapping-5.18' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: benchmark: extract a common header file for map_benchmark definition dma-debug: fix return value of __setup handlers dma-mapping: remove CONFIG_DMA_REMAP media: v4l2-pci-skeleton: Remove usage of the deprecated "pci-dma-compat.h" API rapidio/tsi721: Remove usage of the deprecated "pci-dma-compat.h" API sparc: Remove usage of the deprecated "pci-dma-compat.h" API agp/intel: Remove usage of the deprecated "pci-dma-compat.h" API alpha: Remove usage of the deprecated "pci-dma-compat.h" API MAINTAINERS: update maintainer list of DMA MAPPING BENCHMARK swiotlb: simplify array allocation swiotlb: tidy up includes swiotlb: simplify debugfs setup swiotlb: do not zero buffer in set_memory_decrypted()
2022-03-29phy: PHY_FSL_LYNX_28G should depend on ARCH_LAYERSCAPEGeert Uytterhoeven
Freescale Layerscape Lynx 28G SerDes PHYs are only present on Freescale/NXP Layerscape SoCs. Move PHY_FSL_LYNX_28G outside the block for ARCH_MXC, as the latter is meant for i.MX8 SoCs, which is a different family than Layerscape. Add a dependency on ARCH_LAYERSCAPE, to prevent asking the user about this driver when configuring a kernel without Layerscape SoC support. Fixes: 02e2af20f4f9f2aa ("Merge tag 'char-misc-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc") Fixes: 8f73b37cf3fbda67 ("phy: add support for the Layerscape SerDes 28G") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-03-29drm/i915: Add RPL-S PCI IDsTejas Upadhyay
Add couple of RPL-S device ids Bspec : 53655 Cc: Matt Roper <matthew.d.roper@intel.com> Signed-off-by: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@intel.com> Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com> Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220322040616.1078009-1-tejaskumarx.surendrakumar.upadhyay@intel.com
2022-03-29Revert "parisc: Fix invalidate/flush vmap routines"Helge Deller
This reverts commit 53d862fac4a09b9c56cca0433fa9de5732fd05a1. It turned out that flush_kernel_vmap_range() is being called with interrupts disabled. There's no way to flush entire cache with interrupts disabled. Signed-off-by: Helge Deller <deller@gmx.de>
2022-03-29x86/sev: Unroll string mmio with CC_ATTR_GUEST_UNROLL_STRING_IOJoerg Roedel
The io-specific memcpy/memset functions use string mmio accesses to do their work. Under SEV, the hypervisor can't emulate these instructions because they read/write directly from/to encrypted memory. KVM will inject a page fault exception into the guest when it is asked to emulate string mmio instructions for an SEV guest: BUG: unable to handle page fault for address: ffffc90000065068 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 8000100000067 P4D 8000100000067 PUD 80001000fb067 PMD 80001000fc067 PTE 80000000fed40173 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.0-rc7 #3 As string mmio for an SEV guest can not be supported by the hypervisor, unroll the instructions for CC_ATTR_GUEST_UNROLL_STRING_IO enabled kernels. This issue appears when kernels are launched in recent libvirt-managed SEV virtual machines, because virt-install started to add a tpm-crb device to the guest by default and proactively because, raisins: https://github.com/virt-manager/virt-manager/commit/eb58c09f488b0633ed1eea012cd311e48864401e and as that commit says, the default adding of a TPM can be disabled with "virt-install ... --tpm none". The kernel driver for tpm-crb uses memcpy_to/from_io() functions to access MMIO memory, resulting in a page-fault injected by KVM and crashing the kernel at boot. [ bp: Massage and extend commit message. ] Fixes: d8aa7eea78a1 ('x86/mm: Add Secure Encrypted Virtualization (SEV) support') Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20220321093351.23976-1-joro@8bytes.org
2022-03-29drm/i915: Change SDVO fixed mode handlingVille Syrjälä
SDVO is the only connector type currently returning the VBT fixed mode directly from .get_modes(), everyone else just adds it to the fixed_modes list and then returns that from .get_modes(). Adjust SDVO to follow the common behaviour. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220323182935.4701-10-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2022-03-29drm/i915: Use intel_panel_edid_fixed_mode() for sdvoVille Syrjälä
Despite the name intel_panel_edid_fixed_mode() doesn't actually look in the EDID. All it does is dig out the preferred mode from the connector's probed_modes list. That is also what the SDVO LVDS code is doing by hand. Let's just call intel_panel_edid_fixed_mode(). The slight difference in behaviour is that the SDVO code currently bails if it can't find the preferred mode, whereas intel_panel_edid_fixed_mode() will fall back to just returning the first mode from the probed_modes list. Can't imagine why such an LVDS panel would even exist, and also why would you have a panel and be expected to not use it? So I'm going to assume this is a total non-issue. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220323182935.4701-9-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2022-03-29drm/i915: Extract intel_panel_encoder_fixed_mode()Ville Syrjälä
Apart from the EDID and VBT based mechanism we also sometimes use the encoder's current mode as the panel fixed mode. We currently have the same code for that duplicated in two places. Let's unify. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220323182935.4701-8-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2022-03-29drm/i915: Extract intel_panel_vbt_sdvo_fixed_mode()Ville Syrjälä
We have a function for duplicating the VBT LFP mode. Add the same for the VBT SDVO mode. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220323182935.4701-7-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2022-03-29drm/i915: Rename intel_panel_vbt_fixed_mode()Ville Syrjälä
Rename intel_panel_vbt_fixed_mode() to intel_panel_vbt_lfp_fixed_mode() to be more descriptive. We'll have another VBT fixed mode function soon and we don't want to confuse the two. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220323182935.4701-6-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2022-03-29drm/i915: Use intel_panel_preferred_fixed_mode() moreVille Syrjälä
Use intel_panel_preferred_fixed_mode() for all the orientation quirk setup and compute_is_dual_link_lvds()). All of these happen after intel_panel_init() so the panel fixed_mode list is already in place. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220323182935.4701-5-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2022-03-29drm/i915: Extract intel_edp_add_properties()Ville Syrjälä
Pull the drm_connector_set_panel_orientation_with_quirk() into intel_edp_add_properties() to match how the DSI encoders do it. Less clutter in intel_edp_init_connector() overall. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220323182935.4701-4-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2022-03-29drm/i915: Use DRM_MODE_FMT+DRM_MODE_ARG()Ville Syrjälä
Replace all drm_mode_debug_printmodeline() calls with DRM_MODE_FMT+DRM_MODE_ARG(). Makes the debug output a bit more terse in places where we previously had a newline in the precedeing drm_dbg_kms(), and avoids anything else sneaking in between the two printk()s in all cases. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220323182935.4701-3-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2022-03-29drm/i915: Pass intel_connector to intel_panel_{init,fini}()Ville Syrjälä
All the other intel_panel functions take struct intel_connector, so might as well make init()/fini() take one as well. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220323182935.4701-2-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2022-03-29drm/i915: Split pipe+output CSC programming to noarm+arm pairVille Syrjälä
Move most of the pipe+output CSC programming to the .color_commit_noarm() hook which runs before vblank evasion. Only PIPE_CSC_MODE (the arming register) needs to remain in inside the critical section. A test case that just updates the CTM in a loop produces the following i915_update_info numbers on ilk (w/o lockdep): old new Updates: 10012 Updates: 10008 | | 1us |** 1us |********** |************* |************* 4us |********* 4us |* |* |** 16us | 16us | | | 66us | 66us | | | 262us | 262us | | | 1ms | 1ms | | | 4ms | 4ms | | | 17ms | 17ms | | | Min update: 1345ns Min update: 1268ns Max update: 16672ns Max update: 15656ns Average update: 3914ns Average update: 2185ns Overruns > 100us: 0 Overruns > 100us: 0 And here is tgl (forced to update both pipe CSC and output CSC, and with lockdep enabled): old new Updates: 10012 Updates: 10012 | | 1us | 1us | | | 4us |* 4us |** |** |********** 16us |************* 16us |************* |* | 66us | 66us | | | 262us | 262us | | | 1ms | 1ms | | | 4ms | 4ms | | | 17ms | 17ms | | | Min update: 5204ns Min update: 5176ns Max update: 176038ns Max update: 186685ns Average update: 23931ns Average update: 16654ns Overruns > 250us: 0 Overruns > 250us: 0 Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220224165103.15682-5-ville.syrjala@linux.intel.com Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
2022-03-29drm/i915: Split color_commit() into noarm+arm pairVille Syrjälä
To reduce the amount of registers written during the vblank evade critical section let's also split the .color_commit() hook to noarm+arm pair. The noarm hook runs before the vblank evasion with the arm hook staying inside the critical section. Just the framework here, actually moving stuff out into the noarm hook will follow. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220224165103.15682-4-ville.syrjala@linux.intel.com Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
2022-03-29drm/i915: Make ilk+ pfit regiser unlockedVille Syrjälä
The ilk+ panel fitter register are sitting nicely on their own cacheline, so no need for global serialization via uncore.lock. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220224165103.15682-3-ville.syrjala@linux.intel.com Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
2022-03-29drm/i915: Remove locks around skl+ scaler programmingVille Syrjälä
All the skl+ scaler registers are suitably confined to their own cachelines so we don't need the uncore.lock to globally serialize access to these registers. We actually already dropped some of this in commit 14ad15296d1f ("drm/i915: Make skl+ universal plane registers unlocked") as the plane scaler enabling/reconfiguration became lockless. So let's complete that and remove the rest of the locks from the scaler programming as well. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220224165103.15682-2-ville.syrjala@linux.intel.com Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
2022-03-29Drivers: hv: vmbus: Prevent load re-ordering when reading ring bufferMichael Kelley
When reading a packet from a host-to-guest ring buffer, there is no memory barrier between reading the write index (to see if there is a packet to read) and reading the contents of the packet. The Hyper-V host uses store-release when updating the write index to ensure that writes of the packet data are completed first. On the guest side, the processor can reorder and read the packet data before the write index, and sometimes get stale packet data. Getting such stale packet data has been observed in a reproducible case in a VM on ARM64. Fix this by using virt_load_acquire() to read the write index, ensuring that reads of the packet data cannot be reordered before it. Preventing such reordering is logically correct, and with this change, getting stale data can no longer be reproduced. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Reviewed-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com> Link: https://lore.kernel.org/r/1648394710-33480-1-git-send-email-mikelley@microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
2022-03-29docs: gpu: i915.rst: Fix DRRS documentationJosé Roberto de Souza
intel_drrs_enable() and intel_drrs_disable() were renamed to intel_drrs_activate() and intel_drrs_deactivate() in commit 54903c7a6b40 ("drm/i915: s/enable/active/ for DRRS") and it is causing warnings when generating the kernel documentation. But as for a while DRRS has its own file, so here just let the tool generate the documentation for all exported and documented functions in intel_drrs.c. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220325183832.146472-1-jose.souza@intel.com
2022-03-29Merge tag 'nvme-5.18-2022-03-29' of git://git.infradead.org/nvme into ↵Jens Axboe
for-5.18/drivers Pull NVMe fixes from Christoph: "- fix multipath hang when disk goes live over reconnect (Anton Eidelman) - fix RCU hole that allowed for endless looping in multipath round robin (Chris Leech) - remove redundant assignment after left shift (Colin Ian King) - add quirks for Samsung X5 SSDs (Monish Kumar R) - fix the read-only state for zoned namespaces with unsupposed features (Pankaj Raghav) - use a private workqueue instead of the system workqueue in nvmet (Sagi Grimberg) - allow duplicate NSIDs for private namespaces (Sungup Moon) - expose use_threaded_interrupts read-only in sysfs (Xin Hao)" * tag 'nvme-5.18-2022-03-29' of git://git.infradead.org/nvme: nvme-multipath: fix hang when disk goes live over reconnect nvme: fix RCU hole that allowed for endless looping in multipath round robin nvme: allow duplicate NSIDs for private namespaces nvmet: remove redundant assignment after left shift nvmet: use a private workqueue instead of the system workqueue nvme-pci: add quirks for Samsung X5 SSDs nvme-pci: expose use_threaded_interrupts read-only in sysfs nvme: fix the read-only state for zoned namespaces with unsupposed features
2022-03-29PCI: hv: Propagate coherence from VMbus device to PCI deviceMichael Kelley
PCI pass-thru devices in a Hyper-V VM are represented as a VMBus device and as a PCI device. The coherence of the VMbus device is set based on the VMbus node in ACPI, but the PCI device has no ACPI node and defaults to not hardware coherent. This results in extra software coherence management overhead on ARM64 when devices are hardware coherent. Fix this by setting up the PCI host bus so that normal PCI mechanisms will propagate the coherence of the VMbus device to the PCI device. There's no effect on x86/x64 where devices are always hardware coherent. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Acked-by: Boqun Feng <boqun.feng@gmail.com> Acked-by: Robin Murphy <robin.murphy@arm.com> Link: https://lore.kernel.org/r/1648138492-2191-3-git-send-email-mikelley@microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
2022-03-29Drivers: hv: vmbus: Propagate VMbus coherence to each VMbus deviceMichael Kelley
VMbus synthetic devices are not represented in the ACPI DSDT -- only the top level VMbus device is represented. As a result, on ARM64 coherence information in the _CCA method is not specified for synthetic devices, so they default to not hardware coherent. Drivers for some of these synthetic devices have been recently updated to use the standard DMA APIs, and they are incurring extra overhead of unneeded software coherence management. Fix this by propagating coherence information from the VMbus node in ACPI to the individual synthetic devices. There's no effect on x86/x64 where devices are always hardware coherent. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Acked-by: Robin Murphy <robin.murphy@arm.com> Link: https://lore.kernel.org/r/1648138492-2191-2-git-send-email-mikelley@microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
2022-03-29Drivers: hv: vmbus: Fix potential crash on module unloadGuilherme G. Piccoli
The vmbus driver relies on the panic notifier infrastructure to perform some operations when a panic event is detected. Since vmbus can be built as module, it is required that the driver handles both registering and unregistering such panic notifier callback. After commit 74347a99e73a ("x86/Hyper-V: Unload vmbus channel in hv panic callback") though, the panic notifier registration is done unconditionally in the module initialization routine whereas the unregistering procedure is conditionally guarded and executes only if HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE capability is set. This patch fixes that by unconditionally unregistering the panic notifier in the module's exit routine as well. Fixes: 74347a99e73a ("x86/Hyper-V: Unload vmbus channel in hv panic callback") Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20220315203535.682306-1-gpiccoli@igalia.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
2022-03-29Drivers: hv: vmbus: Fix initialization of device object in ↵Andrea Parri (Microsoft)
vmbus_device_register() Initialize the device's dma_{mask,parms} pointers and the device's dma_mask value before invoking device_register(). Address the following trace with 5.17-rc7: [ 49.646839] WARNING: CPU: 0 PID: 189 at include/linux/dma-mapping.h:543 netvsc_probe+0x37a/0x3a0 [hv_netvsc] [ 49.646928] Call Trace: [ 49.646930] <TASK> [ 49.646935] vmbus_probe+0x40/0x60 [hv_vmbus] [ 49.646942] really_probe+0x1ce/0x3b0 [ 49.646948] __driver_probe_device+0x109/0x180 [ 49.646952] driver_probe_device+0x23/0xa0 [ 49.646955] __device_attach_driver+0x76/0xe0 [ 49.646958] ? driver_allows_async_probing+0x50/0x50 [ 49.646961] bus_for_each_drv+0x84/0xd0 [ 49.646964] __device_attach+0xed/0x170 [ 49.646967] device_initial_probe+0x13/0x20 [ 49.646970] bus_probe_device+0x8f/0xa0 [ 49.646973] device_add+0x41a/0x8e0 [ 49.646975] ? hrtimer_init+0x28/0x80 [ 49.646981] device_register+0x1b/0x20 [ 49.646983] vmbus_device_register+0x5e/0xf0 [hv_vmbus] [ 49.646991] vmbus_add_channel_work+0x12d/0x190 [hv_vmbus] [ 49.646999] process_one_work+0x21d/0x3f0 [ 49.647002] worker_thread+0x4a/0x3b0 [ 49.647005] ? process_one_work+0x3f0/0x3f0 [ 49.647007] kthread+0xff/0x130 [ 49.647011] ? kthread_complete_and_exit+0x20/0x20 [ 49.647015] ret_from_fork+0x22/0x30 [ 49.647020] </TASK> [ 49.647021] ---[ end trace 0000000000000000 ]--- Fixes: 743b237c3a7b0 ("scsi: storvsc: Add Isolation VM support for storvsc driver") Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20220315141053.3223-1-parri.andrea@gmail.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
2022-03-29Drivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in ↵Andrea Parri (Microsoft)
isolated guests hv_panic_page might contain guest-sensitive information, do not dump it over to Hyper-V by default in isolated guests. While at it, update some comments in hyperv_{panic,die}_event(). Reported-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com> Reviewed-by: Dexuan Cui <decui@microsoft.com> Link: https://lore.kernel.org/r/20220301141135.2232-1-parri.andrea@gmail.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
2022-03-29drm/edid: split drm_add_edid_modes() to twoJani Nikula
Reduce the size of the function that actually modifies the EDID. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/437c3c79f68d1144444fb2dd18a678f3aa97272c.1648477901.git.jani.nikula@intel.com
2022-03-29drm/edid: add more general struct edid constness in the interfacesJani Nikula
With this, the remaining non-const parts are the ones that actually modify the EDID, for example to fix corrupt EDID. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/c7156f22494b585c55a00a6732462bde0cc19dbf.1648477901.git.jani.nikula@intel.com
2022-03-29drm/edid: constify struct edid passed around in callbacks and closureJani Nikula
Finalize detailed timing parsing constness by making struct edid also const in callbacks and closure. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/8229be49b5a7686856c17428aa9291b4c4cf1bd5.1648477901.git.jani.nikula@intel.com
2022-03-29drm/edid: constify struct edid passed to detailed blocksJani Nikula
Constify the first level of struct edid in detailed timing parsing. Also switch to struct edid instead of u8. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/ec7acb8a9ee0e2868bbb2afdfdd7db114ae180e1.1648477901.git.jani.nikula@intel.com
generated by cgit (git 2.34.1) at 2025-09-13 23:17:13 +0000