diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0062-KVM-SVM-Prepare-to-reserve-asid-for-SEV-guest.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0062-KVM-SVM-Prepare-to-reserve-asid-for-SEV-guest.patch | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0062-KVM-SVM-Prepare-to-reserve-asid-for-SEV-guest.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0062-KVM-SVM-Prepare-to-reserve-asid-for-SEV-guest.patch new file mode 100644 index 00000000..c1501a41 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0062-KVM-SVM-Prepare-to-reserve-asid-for-SEV-guest.patch @@ -0,0 +1,62 @@ +From 0b7dc18d9169d47409271489c9fab44495ccf63d Mon Sep 17 00:00:00 2001 +From: Brijesh Singh <brijesh.singh@amd.com> +Date: Mon, 4 Dec 2017 10:57:25 -0600 +Subject: [PATCH 62/95] KVM: SVM: Prepare to reserve asid for SEV guest +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Currently, ASID allocation start at 1. Add a svm_vcpu_data.min_asid +which allows supplying a dynamic start ASID. + +Cc: Thomas Gleixner <tglx@linutronix.de> +Cc: Ingo Molnar <mingo@redhat.com> +Cc: "H. Peter Anvin" <hpa@zytor.com> +Cc: Paolo Bonzini <pbonzini@redhat.com> +Cc: "Radim Krčmář" <rkrcmar@redhat.com> +Cc: Joerg Roedel <joro@8bytes.org> +Cc: Borislav Petkov <bp@suse.de> +Cc: Tom Lendacky <thomas.lendacky@amd.com> +Cc: x86@kernel.org +Cc: kvm@vger.kernel.org +Cc: linux-kernel@vger.kernel.org +Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> +Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> +Reviewed-by: Borislav Petkov <bp@suse.de> +Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com> +--- + arch/x86/kvm/svm.c | 4 +++- + 1 file changed, 3 insertions(+), 1 deletion(-) + +diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c +index 3c637b97..abc6cd8 100644 +--- a/arch/x86/kvm/svm.c ++++ b/arch/x86/kvm/svm.c +@@ -539,6 +539,7 @@ 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; +@@ -797,6 +798,7 @@ 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; + + gdt = get_current_gdt_rw(); + sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS); +@@ -2139,7 +2141,7 @@ 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; + } + +-- +2.7.4 + |