diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0067-KVM-SVM-Reserve-ASID-range-for-SEV-guest.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0067-KVM-SVM-Reserve-ASID-range-for-SEV-guest.patch | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0067-KVM-SVM-Reserve-ASID-range-for-SEV-guest.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0067-KVM-SVM-Reserve-ASID-range-for-SEV-guest.patch new file mode 100644 index 00000000..906fdc79 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0067-KVM-SVM-Reserve-ASID-range-for-SEV-guest.patch @@ -0,0 +1,56 @@ +From 30b685840d3edf4a1e0750c0f0f88acf0d2e1629 Mon Sep 17 00:00:00 2001 +From: Brijesh Singh <brijesh.singh@amd.com> +Date: Mon, 4 Dec 2017 10:57:32 -0600 +Subject: [PATCH 67/95] KVM: SVM: Reserve ASID range for SEV guest +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +A SEV-enabled guest must use ASIDs from the defined subset, while non-SEV +guests can use the remaining ASID range. The range of allowed SEV guest +ASIDs is [1 - CPUID_8000_001F[ECX][31:0]]. + +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 +Improvements-by: Borislav Petkov <bp@suse.de> +Signed-off-by: Brijesh Singh <brijesh.singh@amd.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 69b5ce2..77914701 100644 +--- a/arch/x86/kvm/svm.c ++++ b/arch/x86/kvm/svm.c +@@ -333,6 +333,8 @@ enum { + + #define VMCB_AVIC_APIC_BAR_MASK 0xFFFFFFFFFF000ULL + ++static unsigned int max_sev_asid; ++ + static inline void mark_all_dirty(struct vmcb *vmcb) + { + vmcb->control.clean = 0; +@@ -798,7 +800,7 @@ 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; ++ sd->min_asid = max_sev_asid + 1; + + gdt = get_current_gdt_rw(); + sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS); +-- +2.7.4 + |