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答复: [PATCH] i386: Set MCG_STATUS_RIPV bit for mce SRAR error


From: 罗飞
Subject: 答复: [PATCH] i386: Set MCG_STATUS_RIPV bit for mce SRAR error
Date: Sat, 26 Feb 2022 09:52:34 +0000

ping

https://patchew.org/QEMU/20220120084634.131450-1-luofei@unicloud.com/


发件人: 罗飞
发送时间: 2022年1月20日 16:46:34
收件人: qemu-devel
抄送: Paolo Bonzini; Marcelo Tosatti; kvm@vger.kernel.org; 罗飞
主题: [PATCH] i386: Set MCG_STATUS_RIPV bit for mce SRAR error
 
In the physical machine environment, when a SRAR error occurs,
the IA32_MCG_STATUS RIPV bit is set, but qemu does not set this
bit. When qemu injects an SRAR error into virtual machine, the
virtual machine kernel just call do_machine_check() to kill the
current task, but not call memory_failure() to isolate the faulty
page, which will cause the faulty page to be allocated and used
repeatedly. If used by the virtual machine kernel, it will cause
the virtual machine to crash

Signed-off-by: luofei <luofei@unicloud.com>
---
 target/i386/kvm/kvm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index 2c8feb4a6f..14655577f0 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -537,7 +537,7 @@ static void kvm_mce_inject(X86CPU *cpu, hwaddr paddr, int code)
 
     if (code == BUS_MCEERR_AR) {
         status |= MCI_STATUS_AR | 0x134;
-        mcg_status |= MCG_STATUS_EIPV;
+        mcg_status |= MCG_STATUS_RIPV | MCG_STATUS_EIPV;
     } else {
         status |= 0xc0;
         mcg_status |= MCG_STATUS_RIPV;
--
2.27.0


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