40 lines
1.5 KiB
Diff
40 lines
1.5 KiB
Diff
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From 9a6ef31fa2fcf1f1257fb849cc6cabe2b4c440e0 Mon Sep 17 00:00:00 2001
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From: Bibo Mao <maobibo@loongson.cn>
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Date: Fri, 7 Jun 2024 11:50:16 +0800
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Subject: [PATCH 46/78] target/loongarch/kvm: Add software breakpoint support
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With KVM virtualization, debug exception is injected to guest kernel
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rather than host for normal break intruction. Here hypercall
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instruction with special code is used for sw breakpoint usage,
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and detailed instruction comes from kvm kernel with user API
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KVM_REG_LOONGARCH_DEBUG_INST.
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Now only software breakpoint is supported, and it is allowed to
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insert/remove software breakpoint. We can debug guest kernel with gdb
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method after kernel is loaded, hardware breakpoint will be added in later.
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Signed-off-by: Bibo Mao <maobibo@loongson.cn>
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Reviewed-by: Song Gao <gaosong@loongson.cn>
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Tested-by: Song Gao <gaosong@loongson.cn>
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Message-Id: <20240607035016.2975799-1-maobibo@loongson.cn>
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Signed-off-by: Song Gao <gaosong@loongson.cn>
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Signed-off-by: Xianglai Li <lixianglai@loongson.cn>
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---
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configs/targets/loongarch64-softmmu.mak | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/configs/targets/loongarch64-softmmu.mak b/configs/targets/loongarch64-softmmu.mak
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index f23780fdd8..0034c33620 100644
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--- a/configs/targets/loongarch64-softmmu.mak
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+++ b/configs/targets/loongarch64-softmmu.mak
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@@ -1,5 +1,6 @@
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TARGET_ARCH=loongarch64
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TARGET_BASE_ARCH=loongarch
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+TARGET_KVM_HAVE_GUEST_DEBUG=y
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TARGET_SUPPORTS_MTTCG=y
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TARGET_XML_FILES= gdb-xml/loongarch-base32.xml gdb-xml/loongarch-base64.xml gdb-xml/loongarch-fpu.xml
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TARGET_NEED_FDT=y
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--
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2.39.1
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