Daniel Henrique Barboza bea8d23713 RISC-V: KVM: avoid EBUSY when writing same ISA val ...

kvm_riscv_vcpu_set_reg_config() will return -EBUSY if the ISA config reg
is being written after the VCPU ran at least once.

The same restriction isn't placed in kvm_riscv_vcpu_get_reg_config(), so
there's a chance that we'll -EBUSY out on an ISA config reg write even
if the userspace intended no changes to it.

We'll allow the same form of 'lazy writing' that registers such as
zicbom/zicboz_block_size supports: avoid erroring out if userspace made
no changes to the ISA config reg.

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>

2023-08-08 17:25:53 +05:30

..

aia_aplic.c

RISC-V: KVM: Expose APLIC registers as attributes of AIA irqchip

2023-06-18 21:24:50 +05:30

aia_device.c

RISC-V: KVM: Remove unneeded semicolon

2023-06-20 10:48:38 +05:30

aia_imsic.c

RISC-V: KVM: Remove unneeded semicolon

2023-06-20 10:48:38 +05:30

aia.c

RISC-V: KVM: return ENOENT in *_one_reg() when reg is unknown

2023-08-08 17:25:42 +05:30

Kconfig

RISC-V: KVM: Skeletal in-kernel AIA irqchip support

2023-06-18 21:24:40 +05:30

main.c

RISC-V: KVM: Implement guest external interrupt line management

2023-06-18 21:24:33 +05:30

Makefile

RISC-V: KVM: Factor-out ONE_REG related code to its own source file

2023-08-08 17:25:29 +05:30

mmu.c

RISC-V: KVM: Drop the _MASK suffix from hgatp.VMID mask defines

2023-04-21 17:45:44 +05:30

tlb.c

RISC-V: KVM: use bitmap_zero() API

2023-06-06 08:51:50 +05:30

vcpu_exit.c

RISC-V: KVM: Redirect AMO load/store misaligned traps to guest

2023-06-06 09:04:11 +05:30

vcpu_fp.c

RISC-V: KVM: return ENOENT in *_one_reg() when reg is unknown

2023-08-08 17:25:42 +05:30

vcpu_insn.c

RISC-V: KVM: Initial skeletal support for AIA

2023-04-21 17:45:48 +05:30

vcpu_onereg.c

RISC-V: KVM: avoid EBUSY when writing same ISA val

2023-08-08 17:25:53 +05:30

vcpu_pmu.c

RISC-V: KVM: Support firmware events

2023-02-07 20:36:06 +05:30

vcpu_sbi_base.c

RISC-V: KVM: Add ONE_REG interface to enable/disable SBI extensions

2023-04-21 17:38:44 +05:30

vcpu_sbi_hsm.c

RISC-V: KVM: Modify SBI extension handler to return SBI error code

2023-02-07 20:35:45 +05:30

vcpu_sbi_pmu.c

RISC-V: KVM: Add SBI PMU extension support

2023-02-07 20:35:53 +05:30

vcpu_sbi_replace.c

RISC-V: KVM: Increment firmware pmu events

2023-02-07 20:36:08 +05:30

vcpu_sbi_v01.c

RISC-V: KVM: Modify SBI extension handler to return SBI error code

2023-02-07 20:35:45 +05:30

vcpu_sbi.c

RISC-V: KVM: return ENOENT in *_one_reg() when reg is unknown

2023-08-08 17:25:42 +05:30

vcpu_switch.S

RISC-V: KVM: Refine __kvm_riscv_switch_to() implementation

2022-03-11 19:02:22 +05:30

vcpu_timer.c

RISC-V: KVM: do not EOPNOTSUPP in set KVM_REG_RISCV_TIMER_REG

2023-08-08 17:25:49 +05:30

vcpu_vector.c

riscv: KVM: Add vector lazy save/restore support

2023-06-08 07:16:51 -07:00

vcpu.c

RISC-V: KVM: Factor-out ONE_REG related code to its own source file

2023-08-08 17:25:29 +05:30

vm.c

RISC-V: KVM: Skeletal in-kernel AIA irqchip support

2023-06-18 21:24:40 +05:30

vmid.c

RISC-V: KVM: Drop the _MASK suffix from hgatp.VMID mask defines

2023-04-21 17:45:44 +05:30