From: Brijesh Singh <brijesh.singh@amd.com>
To: <x86@kernel.org>, <linux-kernel@vger.kernel.org>,
<kvm@vger.kernel.org>, <linux-efi@vger.kernel.org>,
<platform-driver-x86@vger.kernel.org>,
<linux-coco@lists.linux.dev>, <linux-mm@kvack.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Joerg Roedel <jroedel@suse.de>,
Tom Lendacky <thomas.lendacky@amd.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Ard Biesheuvel <ardb@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
"Vitaly Kuznetsov" <vkuznets@redhat.com>,
Jim Mattson <jmattson@google.com>,
"Andy Lutomirski" <luto@kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
Sergio Lopez <slp@redhat.com>, Peter Gonda <pgonda@google.com>,
"Peter Zijlstra" <peterz@infradead.org>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
David Rientjes <rientjes@google.com>,
Dov Murik <dovmurik@linux.ibm.com>,
Tobin Feldman-Fitzthum <tobin@ibm.com>,
Borislav Petkov <bp@alien8.de>,
Michael Roth <michael.roth@amd.com>,
Vlastimil Babka <vbabka@suse.cz>,
"Kirill A . Shutemov" <kirill@shutemov.name>,
Andi Kleen <ak@linux.intel.com>,
"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
<brijesh.ksingh@gmail.com>, <tony.luck@intel.com>,
<marcorr@google.com>,
<sathyanarayanan.kuppuswamy@linux.intel.com>,
Venu Busireddy <venu.busireddy@oracle.com>,
Brijesh Singh <brijesh.singh@amd.com>
Subject: [PATCH v10 30/45] KVM: x86: Move lookup of indexed CPUID leafs to helper
Date: Wed, 9 Feb 2022 12:10:24 -0600 [thread overview]
Message-ID: <20220209181039.1262882-31-brijesh.singh@amd.com> (raw)
In-Reply-To: <20220209181039.1262882-1-brijesh.singh@amd.com>
From: Michael Roth <michael.roth@amd.com>
Determining which CPUID leafs have significant ECX/index values is
also needed by guest kernel code when doing SEV-SNP-validated CPUID
lookups. Move this to common code to keep future updates in sync.
Reviewed-by: Venu Busireddy <venu.busireddy@oracle.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
arch/x86/include/asm/cpuid.h | 34 ++++++++++++++++++++++++++++++++++
arch/x86/kvm/cpuid.c | 19 ++-----------------
2 files changed, 36 insertions(+), 17 deletions(-)
create mode 100644 arch/x86/include/asm/cpuid.h
diff --git a/arch/x86/include/asm/cpuid.h b/arch/x86/include/asm/cpuid.h
new file mode 100644
index 000000000000..70b2db18165e
--- /dev/null
+++ b/arch/x86/include/asm/cpuid.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * CPUID-related helpers/definitions
+ *
+ * Derived from arch/x86/kvm/cpuid.c
+ */
+
+#ifndef _ASM_X86_CPUID_H
+#define _ASM_X86_CPUID_H
+
+static __always_inline bool cpuid_function_is_indexed(u32 function)
+{
+ switch (function) {
+ case 4:
+ case 7:
+ case 0xb:
+ case 0xd:
+ case 0xf:
+ case 0x10:
+ case 0x12:
+ case 0x14:
+ case 0x17:
+ case 0x18:
+ case 0x1d:
+ case 0x1e:
+ case 0x1f:
+ case 0x8000001d:
+ return true;
+ }
+
+ return false;
+}
+
+#endif /* _ASM_X86_CPUID_H */
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 868fc9526e5a..18a20434759b 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -19,6 +19,7 @@
#include <asm/user.h>
#include <asm/fpu/xstate.h>
#include <asm/sgx.h>
+#include <asm/cpuid.h>
#include "cpuid.h"
#include "lapic.h"
#include "mmu.h"
@@ -719,24 +720,8 @@ static struct kvm_cpuid_entry2 *do_host_cpuid(struct kvm_cpuid_array *array,
cpuid_count(entry->function, entry->index,
&entry->eax, &entry->ebx, &entry->ecx, &entry->edx);
- switch (function) {
- case 4:
- case 7:
- case 0xb:
- case 0xd:
- case 0xf:
- case 0x10:
- case 0x12:
- case 0x14:
- case 0x17:
- case 0x18:
- case 0x1d:
- case 0x1e:
- case 0x1f:
- case 0x8000001d:
+ if (cpuid_function_is_indexed(function))
entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
- break;
- }
return entry;
}
--
2.25.1
next prev parent reply other threads:[~2022-02-09 18:12 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-09 18:09 [PATCH v10 00/45] Add AMD Secure Nested Paging (SEV-SNP) Guest Support Brijesh Singh
2022-02-09 18:09 ` [PATCH v10 01/45] KVM: SVM: Define sev_features and vmpl field in the VMSA Brijesh Singh
2022-02-09 18:09 ` [PATCH v10 02/45] KVM: SVM: Create a separate mapping for the SEV-ES save area Brijesh Singh
2022-02-09 18:09 ` [PATCH v10 03/45] KVM: SVM: Create a separate mapping for the GHCB " Brijesh Singh
2022-02-09 18:09 ` [PATCH v10 04/45] KVM: SVM: Update the SEV-ES save area mapping Brijesh Singh
2022-02-09 18:09 ` [PATCH v10 05/45] x86/boot: Introduce helpers for MSR reads/writes Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 06/45] x86/boot: Use MSR read/write helpers instead of inline assembly Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 07/45] x86/compressed/64: Detect/setup SEV/SME features earlier in boot Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 08/45] x86/sev: " Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 09/45] x86/mm: Extend cc_attr to include AMD SEV-SNP Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 10/45] x86/sev: Define the Linux specific guest termination reasons Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 11/45] x86/sev: Save the negotiated GHCB version Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 12/45] x86/sev: Check SEV-SNP features support Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 13/45] x86/sev: Add a helper for the PVALIDATE instruction Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 14/45] x86/sev: Check the vmpl level Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 15/45] x86/compressed: Add helper for validating pages in the decompression stage Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 16/45] x86/compressed: Register GHCB memory when SEV-SNP is active Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 17/45] x86/sev: " Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 18/45] x86/sev: Add helper for validating pages in early enc attribute changes Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 19/45] x86/kernel: Make the .bss..decrypted section shared in RMP table Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 20/45] x86/kernel: Validate ROM memory before accessing when SEV-SNP is active Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 21/45] x86/mm: Add support to validate memory when changing C-bit Brijesh Singh
2022-02-10 16:48 ` Borislav Petkov
2022-02-11 14:55 ` Borislav Petkov
2022-02-11 17:27 ` Brijesh Singh
2022-02-13 12:15 ` Borislav Petkov
2022-02-13 14:50 ` Tom Lendacky
2022-02-13 17:21 ` Borislav Petkov
2022-02-15 12:43 ` Kirill A. Shutemov
2022-02-15 12:54 ` Borislav Petkov
2022-02-15 13:15 ` Kirill A. Shutemov
2022-02-15 14:41 ` Borislav Petkov
2022-02-16 13:32 ` Borislav Petkov
2022-02-09 18:10 ` [PATCH v10 22/45] x86/sev: Use SEV-SNP AP creation to start secondary CPUs Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 23/45] x86/head/64: Re-enable stack protection Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 24/45] x86/compressed/acpi: Move EFI detection to helper Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 25/45] x86/compressed/acpi: Move EFI system table lookup " Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 26/45] x86/compressed/acpi: Move EFI config " Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 27/45] x86/compressed/acpi: Move EFI vendor " Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 28/45] x86/compressed/acpi: Move EFI kexec handling into common code Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 29/45] x86/boot: Add Confidential Computing type to setup_data Brijesh Singh
2022-02-09 18:10 ` Brijesh Singh [this message]
2022-02-09 18:10 ` [PATCH v10 31/45] x86/sev: Move MSR-based VMGEXITs for CPUID to helper Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 32/45] x86/compressed/64: Add support for SEV-SNP CPUID table in #VC handlers Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 33/45] x86/boot: Add a pointer to Confidential Computing blob in bootparams Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 34/45] x86/compressed: Add SEV-SNP feature detection/setup Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 35/45] x86/compressed: Use firmware-validated CPUID leaves for SEV-SNP guests Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 36/45] x86/compressed: Export and rename add_identity_map() Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 37/45] x86/compressed/64: Add identity mapping for Confidential Computing blob Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 38/45] x86/sev: Add SEV-SNP feature detection/setup Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 39/45] x86/sev: Use firmware-validated CPUID for SEV-SNP guests Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 40/45] x86/sev: Provide support for SNP guest request NAEs Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 41/45] x86/sev: Register SEV-SNP guest request platform device Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 42/45] virt: Add SEV-SNP guest driver Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 43/45] virt: sevguest: Add support to derive key Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 44/45] virt: sevguest: Add support to get extended report Brijesh Singh
2022-02-09 18:10 ` [PATCH v10 45/45] virt: sevguest: Add documentation for SEV-SNP CPUID Enforcement Brijesh Singh
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