Public bug reported: Hello all,
There is a bug in Qemu related to the enabling of external interrupts for multicores (Virt machine). After correcting Qemu as described in #1815078 (https://bugs.launchpad.net/qemu/+bug/1815078), when we try to enable interrupts for core 1 at address 0x0C00_2080 we don't seem to be able to trigger an external interrupt (e.g. UART0). This works perfectly for core 0, but fore core 1 it does not work at all. I assume that given bug #1815078 does not enable any external interrupt then this feature has not been tested. I tried to look at the qemu source code but with no luck so far. I guess the problem is related to function parse_hart_config (in sfive_plic.c) that initializes incorrectly the plic->addr_config[addrid].hartid, which is later on read in sifive_plic_update. But this is a guess. Best regards, Pharos team ** Affects: qemu Importance: Undecided Status: New -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1815721 Title: RISC-V PLIC enable interrupt for multicore Status in QEMU: New Bug description: Hello all, There is a bug in Qemu related to the enabling of external interrupts for multicores (Virt machine). After correcting Qemu as described in #1815078 (https://bugs.launchpad.net/qemu/+bug/1815078), when we try to enable interrupts for core 1 at address 0x0C00_2080 we don't seem to be able to trigger an external interrupt (e.g. UART0). This works perfectly for core 0, but fore core 1 it does not work at all. I assume that given bug #1815078 does not enable any external interrupt then this feature has not been tested. I tried to look at the qemu source code but with no luck so far. I guess the problem is related to function parse_hart_config (in sfive_plic.c) that initializes incorrectly the plic->addr_config[addrid].hartid, which is later on read in sifive_plic_update. But this is a guess. Best regards, Pharos team To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1815721/+subscriptions
