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2024-11-02linux-headers: loongarch: Add kvm_para.hBibo Mao1-0/+1
KVM LBT supports on LoongArch depends on the linux-header file kvm_para.h, add header file kvm_para.h here. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Acked-by: Song Gao <gaosong@loongson.cn> Message-Id: <20241028023809.1554405-3-maobibo@loongson.cn> Signed-off-by: Song Gao <gaosong@loongson.cn>
2024-11-02linux-headers: Add unistd_64.hBibo Mao1-0/+6
since 6.11, unistd.h includes header file unistd_64.h directly on some platforms, here add unistd_64.h on these platforms. Affected platforms are ARM64, LoongArch64 and Riscv. Otherwise there will be compiling error such as: linux-headers/asm/unistd.h:3:10: fatal error: asm/unistd_64.h: No such file or directory #include <asm/unistd_64.h> Signed-off-by: Bibo Mao <maobibo@loongson.cn> Acked-by: Song Gao <gaosong@loongson.cn> Message-Id: <20241028023809.1554405-2-maobibo@loongson.cn> Signed-off-by: Song Gao <gaosong@loongson.cn>
2024-11-02target/loongarch/kvm: Implement LoongArch PMU extensionBibo Mao4-1/+63
Implement PMU extension for LoongArch kvm mode. Use OnOffAuto type variable pmu to check the PMU feature. If the PMU Feature is not supported with KVM host, it reports error if there is pmu=on command line. If there is no any command line about pmu parameter, it checks whether KVM host supports the PMU Feature and set the corresponding value in cpucfg. This patch is based on lbt patch located at https://lore.kernel.org/qemu-devel/20240904061859.86615-1-maobibo@loongson.cn Co-developed-by: Song Gao <gaosong@loongson.cn> Signed-off-by: Bibo Mao <maobibo@loongson.cn> Reviewed-by: Song Gao <gaosong@loongson.cn> Message-Id: <20240918082315.2345034-1-maobibo@loongson.cn> Signed-off-by: Song Gao <gaosong@loongson.cn>
2024-11-02target/loongarch: Implement lbt registers save/restore functionBibo Mao3-0/+98
Six registers scr0 - scr3, eflags and ftop are added in percpu vmstate. And two functions kvm_loongarch_get_lbt/kvm_loongarch_put_lbt are added to save/restore lbt registers. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Reviewed-by: Song Gao <gaosong@loongson.cn> Message-Id: <20240929070405.235200-3-maobibo@loongson.cn> Signed-off-by: Song Gao <gaosong@loongson.cn>
2024-11-02target/loongarch: Add loongson binary translation featureBibo Mao4-2/+87
Loongson Binary Translation (LBT) is used to accelerate binary translation, which contains 4 scratch registers (scr0 to scr3), x86/ARM eflags (eflags) and x87 fpu stack pointer (ftop). Now LBT feature is added in kvm mode, not supported in TCG mode since it is not emulated. Feature variable lbt is added with OnOffAuto type, If lbt feature is not supported with KVM host, it reports error if there is lbt=on command line. If there is no any command line about lbt parameter, it checks whether KVM host supports lbt feature and set the corresponding value in cpucfg. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Reviewed-by: Song Gao <gaosong@loongson.cn> Message-Id: <20240929070405.235200-2-maobibo@loongson.cn> Signed-off-by: Song Gao <gaosong@loongson.cn>
2024-10-31target/riscv: Fix vcompress with rvv_ta_all_1sAnton Blanchard1-1/+1
vcompress packs vl or less fields into vd, so the tail starts after the last packed field. This could be more clearly expressed in the ISA, but for now this thread helps to explain it: https://github.com/riscv/riscv-v-spec/issues/796 Signed-off-by: Anton Blanchard <antonb@tenstorrent.com> Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20241030043538.939712-1-antonb@tenstorrent.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-10-31target/riscv/kvm: clarify how 'riscv-aia' default worksDaniel Henrique Barboza1-10/+4
We do not have control in the default 'riscv-aia' default value. We can try to set it to a specific value, in this case 'auto', but there's no guarantee that the host will accept it. Couple with this we're always doing a 'qemu_log' to inform whether we're ended up using the host default or if we managed to set the AIA mode to the QEMU default we wanted to set. Change the 'riscv-aia' description to better reflect how the option works, and remove the two informative 'qemu_log' that are now unneeded: if no message shows, riscv-aia was set to the default or uset-set value. Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20241028182037.290171-3-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-10-31target/riscv/kvm: set 'aia_mode' to default in error pathDaniel Henrique Barboza1-7/+15
When failing to set the selected AIA mode, 'aia_mode' is left untouched. This means that 'aia_mode' will not reflect the actual AIA mode, retrieved in 'default_aia_mode', This is benign for now, but it will impact QMP query commands that will expose the 'aia_mode' value, retrieving the wrong value. Set 'aia_mode' to 'default_aia_mode' if we fail to change the AIA mode in KVM. While we're at it, rework the log/warning messages to be a bit less verbose. Instead of: KVM AIA: default mode is emul qemu-system-riscv64: warning: KVM AIA: failed to set KVM AIA mode We can use a single warning message: qemu-system-riscv64: warning: KVM AIA: failed to set KVM AIA mode 'auto', using default host mode 'emul' Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20241028182037.290171-2-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-10-31docs/specs: add riscv-iommuDaniel Henrique Barboza3-0/+104
Add a simple guideline to use the existing RISC-V IOMMU support we just added. This doc will be updated once we add the riscv-iommu-sys device. Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20241016204038.649340-13-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-10-31qtest/riscv-iommu-test: add init queues testDaniel Henrique Barboza2-0/+155
Add an additional test to further exercise the IOMMU where we attempt to initialize the command, fault and page-request queues. These steps are taken from chapter 6.2 of the RISC-V IOMMU spec, "Guidelines for initialization". It emulates what we expect from the software/OS when initializing the IOMMU. Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Frank Chang <frank.chang@sifive.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20241016204038.649340-12-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-10-31hw/riscv/riscv-iommu: add DBG supportTomasz Jeznach2-0/+76
DBG support adds three additional registers: tr_req_iova, tr_req_ctl and tr_response. The DBG cap is always enabled. No on/off toggle is provided for it. Signed-off-by: Tomasz Jeznach <tjeznach@rivosinc.com> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Frank Chang <frank.chang@sifive.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20241016204038.649340-11-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-10-31hw/riscv/riscv-iommu: add ATS supportTomasz Jeznach4-3/+171
Add PCIe Address Translation Services (ATS) capabilities to the IOMMU. This will add support for ATS translation requests in Fault/Event queues, Page-request queue and IOATC invalidations. Signed-off-by: Tomasz Jeznach <tjeznach@rivosinc.com> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Frank Chang <frank.chang@sifive.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20241016204038.649340-10-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-10-31hw/riscv/riscv-iommu: add Address Translation Cache (IOATC)Tomasz Jeznach2-4/+203
The RISC-V IOMMU spec predicts that the IOMMU can use translation caches to hold entries from the DDT. This includes implementation for all cache commands that are marked as 'not implemented'. There are some artifacts included in the cache that predicts s-stage and g-stage elements, although we don't support it yet. We'll introduce them next. Signed-off-by: Tomasz Jeznach <tjeznach@rivosinc.com> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Frank Chang <frank.chang@sifive.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20241016204038.649340-9-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-10-31test/qtest: add riscv-iommu-pci testsDaniel Henrique Barboza5-0/+237
To test the RISC-V IOMMU emulation we'll use its PCI representation. Create a new 'riscv-iommu-pci' libqos device that will be present with CONFIG_RISCV_IOMMU. This config is only available for RISC-V, so this device will only be consumed by the RISC-V libqos machine. Start with basic tests: a PCI sanity check and a reset state register test. The reset test was taken from the RISC-V IOMMU spec chapter 5.2, "Reset behavior". More tests will be added later. Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Frank Chang <frank.chang@sifive.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20241016204038.649340-8-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-10-31hw/riscv/virt.c: support for RISC-V IOMMU PCIDevice hotplugTomasz Jeznach1-1/+32
Generate device tree entry for riscv-iommu PCI device, along with mapping all PCI device identifiers to the single IOMMU device instance. Signed-off-by: Tomasz Jeznach <tjeznach@rivosinc.com> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Frank Chang <frank.chang@sifive.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20241016204038.649340-7-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-10-31