Anup Patel c667ad229d RISC-V: KVM: Forward SBI DBCN extension to user-space ... The frozen SBI v2.0 specification defines the SBI debug console (DBCN) extension which replaces the legacy SBI v0.1 console functions namely sbi_console_getchar() and sbi_console_putchar(). The SBI DBCN extension needs to be emulated in the KVM user-space (i.e. QEMU-KVM or KVMTOOL) so we forward SBI DBCN calls from KVM guest to the KVM user-space which can then redirect the console input/output to wherever it wants (e.g. telnet, file, stdio, etc). The SBI debug console is simply a early console available to KVM guest for early prints and it does not intend to replace the proper console devices such as 8250, VirtIO console, etc. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Signed-off-by: Anup Patel <anup@brainfault.org>		2023-10-20 16:50:36 +05:30
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asm	RISC-V: KVM: Forward SBI DBCN extension to user-space	2023-10-20 16:50:36 +05:30
uapi/asm	RISC-V: KVM: Forward SBI DBCN extension to user-space	2023-10-20 16:50:36 +05:30