From: Paolo Bonzini <pbonzini@redhat.com>
To: Lara Lazier <laramglazier@gmail.com>, qemu-devel@nongnu.org
Subject: Re: [PATCH v2] target/i386: Added VGIF feature
Date: Thu, 29 Jul 2021 10:01:22 +0200 [thread overview]
Message-ID: <1c07bcfd-b240-92ef-03b9-a87d6deff61c@redhat.com> (raw)
In-Reply-To: <20210728113742.41464-1-laramglazier@gmail.com>
On 28/07/21 13:37, Lara Lazier wrote:
> + uint32_t int_ctl = x86_ldl_phys(cs,
> + env->vm_vmcb + offsetof(struct vmcb, control.int_ctl));
> + if (virtual_gif_enabled(env, int_ctl) && likely(env->hflags & HF_GUEST_MASK)) {
> + x86_stl_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.int_ctl),
> + int_ctl & ~V_GIF_MASK);
> + } else {
Sorry for the double reply. env->vm_vmcb is not guaranteed to be valid
if not in guest mode, so there are two possibilities.
1) Keep the HF_GUEST_MASK check directly in the helpers, but do it
before x86_ldl_phys
2) Move x86_ldl_phys to virtual_gif_enabled, with a prototype like
bool virtual_gif_enabled(CPUX86State *env, uint32_t *int_ctl)
i.e. returning int_ctl from virtual_gif_enabled via pass-by-reference.
Thanks,
Paolo
prev parent reply other threads:[~2021-07-29 8:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-28 11:37 [PATCH v2] target/i386: Added VGIF feature Lara Lazier
2021-07-29 7:59 ` Paolo Bonzini
2021-07-29 8:01 ` Paolo Bonzini [this message]
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