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Re: [Qemu-devel] [RFC PATCH v1 17/22] target-i386: add cpuid Fn8000_001f
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [RFC PATCH v1 17/22] target-i386: add cpuid Fn8000_001f |
Date: |
Wed, 14 Sep 2016 01:07:39 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 |
On 13/09/2016 16:49, Brijesh Singh wrote:
> Fn8000_001f cpuid provides the memory encryption (aka C-bit)
>
> Signed-off-by: Brijesh Singh <address@hidden>
> ---
> target-i386/cpu.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/target-i386/cpu.c b/target-i386/cpu.c
> index 6a1afab..e039c08 100644
> --- a/target-i386/cpu.c
> +++ b/target-i386/cpu.c
> @@ -2625,6 +2625,9 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
> uint32_t count,
> *edx = 0;
> }
> break;
> + case 0x8000001F:
> + host_cpuid(index, 0, eax, ebx, ecx, edx);
> + break;
> case 0xC0000000:
> *eax = env->cpuid_xlevel2;
> *ebx = 0;
>
>
>
This should only be visible to a SEV-enabled guest. Also, the xlevel
should be bumped to 0x8000001F for SEV-enabled guests.
Paolo
[Qemu-devel] [RFC PATCH v1 07/22] sev: add SEV launch start command, Brijesh Singh, 2016/09/13
[Qemu-devel] [RFC PATCH v1 12/22] sev: add SEV guest status command, Brijesh Singh, 2016/09/13
[Qemu-devel] [RFC PATCH v1 22/22] loader: reload bios image on ROM reset in SEV-enabled guest, Brijesh Singh, 2016/09/13