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Mon, 22 Aug 2016 23:27:51 +0000 Subject: [RFC PATCH v1 19/28] KVM: SVM: prepare to reserve asid for SEV guest From: Brijesh Singh To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Date: Mon, 22 Aug 2016 19:27:45 -0400 Message-ID: <147190846546.9523.8365293594479732082.stgit@brijesh-build-machine> In-Reply-To: <147190820782.9523.4967724730957229273.stgit@brijesh-build-machine> References: <147190820782.9523.4967724730957229273.stgit@brijesh-build-machine> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Originating-IP: [165.204.77.1] X-ClientProxiedBy: BN6PR08CA0051.namprd08.prod.outlook.com (10.172.144.13) To BY2PR12MB0661.namprd12.prod.outlook.com (10.163.113.150) X-MS-Office365-Filtering-Correlation-Id: 12cae601-b49c-46c1-c696-08d3cae3f268 X-Microsoft-Exchange-Diagnostics: 1; BY2PR12MB0661; 2:d19h+OxrCzQ11BvTSf5M/8VPr4ifLgPdgA2fZZGtgPSH0W7KMrujWV2Z5EjWP//Nf+Xj61eBi1EnUPKQ206kbEKvCqN+AmBBtZ8up0dMrWF97pRgrl+00lllcJZUpnUopmLS+Hy/aqhMEwm0brqEkOwgI3G0FZRO9pDo33hyv948d0sP0WUbBBJ8VmdY6XPV; 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Signed-off-by: Brijesh Singh Reviewed-by: Paolo Bonzini --- arch/x86/kvm/svm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 211be94..f010b23 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -470,6 +470,7 @@ struct svm_cpu_data { u64 asid_generation; u32 max_asid; u32 next_asid; + u32 min_asid; struct kvm_ldttss_desc *tss_desc; struct page *save_area; @@ -726,6 +727,7 @@ static int svm_hardware_enable(void) sd->asid_generation = 1; sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1; sd->next_asid = sd->max_asid + 1; + sd->min_asid = 1; native_store_gdt(&gdt_descr); gdt = (struct desc_struct *)gdt_descr.address; @@ -1887,7 +1889,7 @@ static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd) { if (sd->next_asid > sd->max_asid) { ++sd->asid_generation; - sd->next_asid = 1; + sd->next_asid = sd->min_asid; svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID; }