[patch 147/164] KVM: x86: Add callback to let modules decide over some supported cpuid bits
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From: Greg KH on 1 Jul 2010 17:00 2.6.33-stable review patch. If anyone has any objections, please let me know. ------------------ From: Joerg Roedel <joerg.roedel(a)amd.com> This patch adds the get_supported_cpuid callback to kvm_x86_ops. It will be used in do_cpuid_ent to delegate the decission about some supported cpuid bits to the architecture modules. Cc: stable(a)kernel.org Signed-off-by: Joerg Roedel <joerg.roedel(a)amd.com> Signed-off-by: Avi Kivity <avi(a)redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de> (cherry picked from commit d4330ef2fb2236a1e3a176f0f68360f4c0a8661b) --- arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/kvm/svm.c | 5 +++++ arch/x86/kvm/vmx.c | 5 +++++ arch/x86/kvm/x86.c | 3 +++ 4 files changed, 15 insertions(+) --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -533,6 +533,8 @@ struct kvm_x86_ops { u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); bool (*gb_page_enable)(void); + void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); + const struct trace_print_flags *exit_reasons_str; }; --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -2885,6 +2885,10 @@ static u64 svm_get_mt_mask(struct kvm_vc return 0; } +static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) +{ +} + static const struct trace_print_flags svm_exit_reasons_str[] = { { SVM_EXIT_READ_CR0, "read_cr0" }, { SVM_EXIT_READ_CR3, "read_cr3" }, @@ -3009,6 +3013,7 @@ static struct kvm_x86_ops svm_x86_ops = .exit_reasons_str = svm_exit_reasons_str, .gb_page_enable = svm_gb_page_enable, + .set_supported_cpuid = svm_set_supported_cpuid, }; static int __init svm_init(void) --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -3993,6 +3993,10 @@ static bool vmx_gb_page_enable(void) return false; } +static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) +{ +} + static struct kvm_x86_ops vmx_x86_ops = { .cpu_has_kvm_support = cpu_has_kvm_support, .disabled_by_bios = vmx_disabled_by_bios, @@ -4057,6 +4061,7 @@ static struct kvm_x86_ops vmx_x86_ops = .exit_reasons_str = vmx_exit_reasons_str, .gb_page_enable = vmx_gb_page_enable, + .set_supported_cpuid = vmx_set_supported_cpuid, }; static int __init vmx_init(void) --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1688,6 +1688,9 @@ static void do_cpuid_ent(struct kvm_cpui entry->ecx &= kvm_supported_word6_x86_features; break; } + + kvm_x86_ops->set_supported_cpuid(function, entry); + put_cpu(); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |