From 17fb88a0fa0a13b0e2976a2fe04756337d95fe1f Mon Sep 17 00:00:00 2001 From: Bibo Mao Date: Fri, 6 Jun 2025 14:35:23 +0800 Subject: [PATCH] hw/loongarch/virt: Disable emulation with IOCSR misc register Register IOCSR MISC_FUNC_REG is to enable features about EXTIOI irqchip. If EXTIOI is emulated in kernel, MISC_FUNC_REG register should be emulated in kernel also. Reviewed-by: Song Gao Signed-off-by: Bibo Mao Message-ID: <20250606063523.2557513-1-maobibo@loongson.cn> Signed-off-by: Song Gao --- hw/loongarch/virt.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c index 34dfbd13e5c..e5468b6af90 100644 --- a/hw/loongarch/virt.c +++ b/hw/loongarch/virt.c @@ -522,6 +522,10 @@ static MemTxResult virt_iocsr_misc_write(void *opaque, hwaddr addr, switch (addr) { case MISC_FUNC_REG: + if (kvm_irqchip_in_kernel()) { + return MEMTX_OK; + } + if (!virt_is_veiointc_enabled(lvms)) { return MEMTX_OK; } @@ -572,6 +576,10 @@ static MemTxResult virt_iocsr_misc_read(void *opaque, hwaddr addr, ret = 0x303030354133ULL; /* "3A5000" */ break; case MISC_FUNC_REG: + if (kvm_irqchip_in_kernel()) { + return MEMTX_OK; + } + if (!virt_is_veiointc_enabled(lvms)) { ret |= BIT_ULL(IOCSRM_EXTIOI_EN); break; -- 2.47.2