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Re: [Qemu-devel] [PATCH for-1.6] pc: compat: remove PCLMULQDQ from Westm
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH for-1.6] pc: compat: remove PCLMULQDQ from Westmere on pc-*-1.4 and older |
Date: |
Fri, 09 Aug 2013 16:43:49 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 |
Il 09/08/2013 16:11, Eduardo Habkost ha scritto:
> commit 41cb383f42d0cb51d8e3e25e3ecebc954dd4196f made a guest-visible
> change by adding the PCLMULQDQ bit to Westmere without adding
> compatibility code to keep the ABI older machine-types. This patch fixes
> it by adding the missing compat code.
>
> Signed-off-by: Eduardo Habkost <address@hidden>
> ---
> Bug detected by the virt-test CPUID-dump comparison test case, available at:
> https://github.com/autotest/virt-test/pull/714
> ---
> hw/i386/pc_piix.c | 1 +
> hw/i386/pc_q35.c | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> index ab25458..2817092 100644
> --- a/hw/i386/pc_piix.c
> +++ b/hw/i386/pc_piix.c
> @@ -259,6 +259,7 @@ static void pc_init_pci_1_4(QEMUMachineInitArgs *args)
> {
> has_pvpanic = false;
> x86_cpu_compat_set_features("n270", FEAT_1_ECX, 0, CPUID_EXT_MOVBE);
> + x86_cpu_compat_set_features("Westmere", FEAT_1_ECX, 0,
> CPUID_EXT_PCLMULQDQ);
> pc_init_pci_1_5(args);
> }
>
> diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
> index 2f35d12..25c6b33 100644
> --- a/hw/i386/pc_q35.c
> +++ b/hw/i386/pc_q35.c
> @@ -227,6 +227,7 @@ static void pc_q35_init_1_4(QEMUMachineInitArgs *args)
> {
> has_pvpanic = false;
> x86_cpu_compat_set_features("n270", FEAT_1_ECX, 0, CPUID_EXT_MOVBE);
> + x86_cpu_compat_set_features("Westmere", FEAT_1_ECX, 0,
> CPUID_EXT_PCLMULQDQ);
> pc_q35_init_1_5(args);
> }
>
>
Adding 1.6 tag.
Paolo