| commit | b889212973dabee119a1ab21326a27fc51b88d6d | |
| author | Liran Alon <liran.alon@oracle.com> | |
| Thu, 12 Mar 2020 16:54:18 +0000 (12 18:54 +0200) | ||
| committer | Paolo Bonzini <pbonzini@redhat.com> | |
| Wed, 10 Jun 2020 16:09:43 +0000 (10 12:09 -0400) | ||
| tree | 576d81bfed3d8cdc34f6319346f08822b9ef257e | treesnapshot (tar.gz zip) |
| parent | c9ab24cef8ab680e3d24d7332599b2b857bd107b | commitdiff |
hw/i386/vmport: Propagate IOPort read to vCPU EAX register
vmport_ioport_read() returns the value that should propagate to vCPU EAX
register when guest reads VMPort IOPort (i.e. By x86 IN instruction).
However, because vmport_ioport_read() calls cpu_synchronize_state(), the
returned value gets overridden by the value in QEMU vCPU EAX register.
i.e. cpu->env.regs[R_EAX].
To fix this issue, change vmport_ioport_read() to explicitly override
cpu->env.regs[R_EAX] with the value it wish to propagate to vCPU EAX
register.
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Message-Id: <20200312165431.82118-4-liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
vmport_ioport_read() returns the value that should propagate to vCPU EAX
register when guest reads VMPort IOPort (i.e. By x86 IN instruction).
However, because vmport_ioport_read() calls cpu_synchronize_state(), the
returned value gets overridden by the value in QEMU vCPU EAX register.
i.e. cpu->env.regs[R_EAX].
To fix this issue, change vmport_ioport_read() to explicitly override
cpu->env.regs[R_EAX] with the value it wish to propagate to vCPU EAX
register.
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Message-Id: <20200312165431.82118-4-liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| hw/core/machine.c | diffblobblamehistory | |
| hw/i386/vmport.c | diffblobblamehistory |