From: isaku.yamahata@intel.com
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H . Peter Anvin" <hpa@zytor.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
erdemaktas@google.com, Connor Kuehl <ckuehl@redhat.com>,
Sean Christopherson <seanjc@google.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com,
Xiaoyao Li <xiaoyao.li@intel.com>
Subject: [RFC PATCH v3 05/59] KVM: TDX: add a helper function for kvm to call seamcall
Date: Wed, 24 Nov 2021 16:19:48 -0800 [thread overview]
Message-ID: <d089468157dddab3e231a4d757aa1770b380224d.1637799475.git.isaku.yamahata@intel.com> (raw)
In-Reply-To: <cover.1637799475.git.isaku.yamahata@intel.com>
From: Isaku Yamahata <isaku.yamahata@intel.com>
Add a helper function for kvm to call seamcall and a helper macro to check
its return value. The later patches will use them.
Co-developed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
---
arch/x86/kvm/vmx/seamcall.h | 113 ++++++++++++++++++++++++++++++++++++
1 file changed, 113 insertions(+)
create mode 100644 arch/x86/kvm/vmx/seamcall.h
diff --git a/arch/x86/kvm/vmx/seamcall.h b/arch/x86/kvm/vmx/seamcall.h
new file mode 100644
index 000000000000..f27e9d27137d
--- /dev/null
+++ b/arch/x86/kvm/vmx/seamcall.h
@@ -0,0 +1,113 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __KVM_VMX_SEAMCALL_H
+#define __KVM_VMX_SEAMCALL_H
+
+#include <asm/asm.h>
+
+#ifdef CONFIG_INTEL_TDX_HOST
+
+#ifdef __ASSEMBLER__
+
+.macro seamcall
+ .byte 0x66, 0x0f, 0x01, 0xcf
+.endm
+
+#else
+
+/*
+ * TDX extended return:
+ * Some of The "TDX module" SEAMCALLs return extended values (which are function
+ * leaf specific) in registers in addition to the completion status code in
+ %rax.
+ */
+struct tdx_ex_ret {
+ union {
+ struct {
+ u64 rcx;
+ u64 rdx;
+ u64 r8;
+ u64 r9;
+ u64 r10;
+ u64 r11;
+ } regs;
+ /* TDH_MNG_INIT returns CPUID info on error. */
+ struct {
+ u32 leaf;
+ u32 subleaf;
+ } mng_init;
+ /* Functions that walk SEPT */
+ struct {
+ u64 septe;
+ struct {
+ u64 level :3;
+ u64 sept_reserved_0 :5;
+ u64 state :8;
+ u64 sept_reserved_1 :48;
+ };
+ } sept_walk;
+ /* TDH_MNG_{RD,WR} return the field value. */
+ struct {
+ u64 field_val;
+ } mng_rdwr;
+ /* TDH_MEM_{RD,WR} return the error info and value. */
+ struct {
+ u64 ext_err_info_1;
+ u64 ext_err_info_2;
+ u64 mem_val;
+ } mem_rdwr;
+ /* TDH_PHYMEM_PAGE_RDMD and TDH_PHYMEM_PAGE_RECLAIM return page metadata. */
+ struct {
+ u64 page_type;
+ u64 owner;
+ u64 page_size;
+ } phymem_page_md;
+ };
+};
+
+static inline u64 seamcall(u64 op, u64 rcx, u64 rdx, u64 r8, u64 r9, u64 r10,
+ struct tdx_ex_ret *ex)
+{
+ register unsigned long r8_in asm("r8");
+ register unsigned long r9_in asm("r9");
+ register unsigned long r10_in asm("r10");
+ register unsigned long r8_out asm("r8");
+ register unsigned long r9_out asm("r9");
+ register unsigned long r10_out asm("r10");
+ register unsigned long r11_out asm("r11");
+ struct tdx_ex_ret dummy;
+ u64 ret;
+
+ if (!ex)
+ /* The following inline assembly requires non-NULL ex. */
+ ex = &dummy;
+
+ /*
+ * Because the TDX module is known to be already initialized, seamcall
+ * instruction should always succeed without exceptions. Don't check
+ * the instruction error with CF=1 for the availability of the TDX
+ * module.
+ */
+ r8_in = r8;
+ r9_in = r9;
+ r10_in = r10;
+ asm volatile (
+ ".byte 0x66, 0x0f, 0x01, 0xcf\n\t" /* seamcall instruction */
+ : ASM_CALL_CONSTRAINT, "=a"(ret),
+ "=c"(ex->regs.rcx), "=d"(ex->regs.rdx),
+ "=r"(r8_out), "=r"(r9_out), "=r"(r10_out), "=r"(r11_out)
+ : "a"(op), "c"(rcx), "d"(rdx),
+ "r"(r8_in), "r"(r9_in), "r"(r10_in)
+ : "cc", "memory");
+ ex->regs.r8 = r8_out;
+ ex->regs.r9 = r9_out;
+ ex->regs.r10 = r10_out;
+ ex->regs.r11 = r11_out;
+
+ return ret;
+}
+
+#endif /* !__ASSEMBLER__ */
+
+#endif /* CONFIG_INTEL_TDX_HOST */
+
+#endif /* __KVM_VMX_SEAMCALL_H */
--
2.25.1
next prev parent reply other threads:[~2021-11-25 0:21 UTC|newest]
Thread overview: 123+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-25 0:19 [RFC PATCH v3 00/59] KVM: X86: TDX support isaku.yamahata
2021-11-25 0:19 ` [RFC PATCH v3 01/59] x86/mktme: move out MKTME related constatnts/macro to msr-index.h isaku.yamahata
2021-11-25 0:19 ` [RFC PATCH v3 02/59] x86/mtrr: mask out keyid bits from variable mtrr mask register isaku.yamahata
2021-11-25 0:19 ` [RFC PATCH v3 03/59] KVM: TDX: Define TDX architectural definitions isaku.yamahata
2021-11-25 0:19 ` [RFC PATCH v3 04/59] KVM: TDX: Add TDX "architectural" error codes isaku.yamahata
2021-11-25 0:19 ` isaku.yamahata [this message]
2021-11-25 0:19 ` [RFC PATCH v3 06/59] KVM: TDX: Add C wrapper functions for TDX SEAMCALLs isaku.yamahata
2021-11-25 0:19 ` [RFC PATCH v3 07/59] KVM: TDX: Add helper functions to print TDX SEAMCALL error isaku.yamahata
2021-11-25 0:19 ` [RFC PATCH v3 08/59] KVM: Export kvm_io_bus_read for use by TDX for PV MMIO isaku.yamahata
2021-11-25 17:14 ` Thomas Gleixner
2021-11-25 0:19 ` [RFC PATCH v3 09/59] KVM: Enable hardware before doing arch VM initialization isaku.yamahata
2021-11-25 19:02 ` Thomas Gleixner
2021-11-25 0:19 ` [RFC PATCH v3 10/59] KVM: x86: Split core of hypercall emulation to helper function isaku.yamahata
2021-11-25 0:19 ` [RFC PATCH v3 11/59] KVM: x86: Export kvm_mmio tracepoint for use by TDX for PV MMIO isaku.yamahata
2021-11-25 0:19 ` [RFC PATCH v3 12/59] KVM: x86/mmu: Zap only leaf SPTEs for deleted/moved memslot by default isaku.yamahata
2021-11-25 19:04 ` Thomas Gleixner
2021-11-25 0:19 ` [RFC PATCH v3 13/59] KVM: Add max_vcpus field in common 'struct kvm' isaku.yamahata
2021-11-25 19:06 ` Thomas Gleixner
2021-11-25 0:19 ` [RFC PATCH v3 14/59] KVM: x86: Add vm_type to differentiate legacy VMs from protected VMs isaku.yamahata
2021-11-25 19:08 ` Thomas Gleixner
2021-11-29 17:35 ` Sean Christopherson
2021-12-01 19:37 ` Isaku Yamahata
2021-12-03 16:14 ` Sean Christopherson
2021-11-25 0:19 ` [RFC PATCH v3 15/59] KVM: x86: Introduce "protected guest" concept and block disallowed ioctls isaku.yamahata
2021-11-25 19:26 ` Thomas Gleixner
2021-11-25 0:19 ` [RFC PATCH v3 16/59] KVM: x86: Add per-VM flag to disable direct IRQ injection isaku.yamahata
2021-11-25 19:31 ` Thomas Gleixner
2021-11-29 2:49 ` Lai Jiangshan
2021-11-25 0:20 ` [RFC PATCH v3 17/59] KVM: x86: Add flag to disallow #MC injection / KVM_X86_SETUP_MCE isaku.yamahata
2021-11-25 19:33 ` Thomas Gleixner
2021-11-25 0:20 ` [RFC PATCH v3 18/59] KVM: x86: Add flag to mark TSC as immutable (for TDX) isaku.yamahata
2021-11-25 19:40 ` Thomas Gleixner
2021-11-29 18:05 ` Sean Christopherson
2021-11-25 0:20 ` [RFC PATCH v3 19/59] KVM: Add per-VM flag to mark read-only memory as unsupported isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 20/59] KVM: Add per-VM flag to disable dirty logging of memslots for TDs isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 21/59] KVM: x86: Add per-VM flag to disable in-kernel I/O APIC and level routes isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 22/59] KVM: x86: add per-VM flags to disable SMI/INIT/SIPI isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 23/59] KVM: x86: Allow host-initiated WRMSR to set X2APIC regardless of CPUID isaku.yamahata
2021-11-25 19:41 ` Thomas Gleixner
2021-11-26 8:18 ` Paolo Bonzini
2021-11-29 21:21 ` Sean Christopherson
2021-11-25 0:20 ` [RFC PATCH v3 24/59] KVM: x86: Add kvm_x86_ops .cache_gprs() and .flush_gprs() isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 25/59] KVM: x86: Add support for vCPU and device-scoped KVM_MEMORY_ENCRYPT_OP isaku.yamahata
2021-11-25 19:42 ` Thomas Gleixner
2021-11-25 0:20 ` [RFC PATCH v3 26/59] KVM: x86: Introduce vm_teardown() hook in kvm_arch_vm_destroy() isaku.yamahata
2021-11-25 19:46 ` Thomas Gleixner
2021-11-25 20:54 ` Paolo Bonzini
2021-11-25 21:11 ` Thomas Gleixner
2021-11-29 18:16 ` Sean Christopherson
2021-11-25 0:20 ` [RFC PATCH v3 27/59] KVM: x86: Add a switch_db_regs flag to handle TDX's auto-switched behavior isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 28/59] KVM: x86: Check for pending APICv interrupt in kvm_vcpu_has_events() isaku.yamahata
2021-11-25 20:50 ` Paolo Bonzini
2021-11-29 19:20 ` Sean Christopherson
2021-11-25 0:20 ` [RFC PATCH v3 29/59] KVM: x86: Add option to force LAPIC expiration wait isaku.yamahata
2021-11-25 19:53 ` Thomas Gleixner
2021-11-25 0:20 ` [RFC PATCH v3 30/59] KVM: x86: Add guest_supported_xss placholder isaku.yamahata
2021-11-25 19:55 ` Thomas Gleixner
2021-11-25 0:20 ` [RFC PATCH v3 31/59] KVM: x86: Add infrastructure for stolen GPA bits isaku.yamahata
2021-11-25 20:00 ` Thomas Gleixner
2021-11-25 0:20 ` [RFC PATCH v3 32/59] KVM: x86/mmu: Explicitly check for MMIO spte in fast page fault isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 33/59] KVM: x86/mmu: Ignore bits 63 and 62 when checking for "present" SPTEs isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 34/59] KVM: x86/mmu: Allow non-zero init value for shadow PTE isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 35/59] KVM: x86/mmu: Return old SPTE from mmu_spte_clear_track_bits() isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 36/59] KVM: x86/mmu: Frame in support for private/inaccessible shadow pages isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 37/59] KVM: x86/mmu: Introduce kvm_mmu_map_tdp_page() for use by TDX isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 38/59] KVM: x86/mmu: Allow per-VM override of the TDP max page level isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 39/59] KVM: VMX: Modify NMI and INTR handlers to take intr_info as param isaku.yamahata
2021-11-25 20:06 ` Thomas Gleixner
2021-11-25 0:20 ` [RFC PATCH v3 40/59] KVM: VMX: Move NMI/exception handler to common helper isaku.yamahata
2021-11-25 20:06 ` Thomas Gleixner
2021-11-25 0:20 ` [RFC PATCH v3 41/59] KVM: VMX: Split out guts of EPT violation to common/exposed function isaku.yamahata
2021-11-25 20:07 ` Thomas Gleixner
2021-11-25 0:20 ` [RFC PATCH v3 42/59] KVM: VMX: Define EPT Violation architectural bits isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 43/59] KVM: VMX: Define VMCS encodings for shared EPT pointer isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 44/59] KVM: VMX: Add 'main.c' to wrap VMX and TDX isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 45/59] KVM: VMX: Move setting of EPT MMU masks to common VT-x code isaku.yamahata
2021-11-25 20:08 ` Thomas Gleixner
2021-11-25 0:20 ` [RFC PATCH v3 46/59] KVM: VMX: Move register caching logic to common code isaku.yamahata
2021-11-25 20:11 ` Thomas Gleixner
2021-11-25 20:17 ` Paolo Bonzini
2021-11-29 18:23 ` Sean Christopherson
2021-11-29 18:28 ` Paolo Bonzini
2021-11-25 0:20 ` [RFC PATCH v3 47/59] KVM: TDX: Define TDCALL exit reason isaku.yamahata
2021-11-25 20:19 ` Thomas Gleixner
2021-11-29 18:36 ` Sean Christopherson
2021-11-25 0:20 ` [RFC PATCH v3 48/59] KVM: TDX: Stub in tdx.h with structs, accessors, and VMCS helpers isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 49/59] KVM: VMX: Add macro framework to read/write VMCS for VMs and TDs isaku.yamahata
2021-11-25 20:24 ` Thomas Gleixner
2021-11-25 0:20 ` [RFC PATCH v3 50/59] KVM: VMX: Move AR_BYTES encoder/decoder helpers to common.h isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 51/59] KVM: VMX: MOVE GDT and IDT accessors to common code isaku.yamahata
2021-11-25 20:25 ` Thomas Gleixner
2021-11-25 0:20 ` [RFC PATCH v3 52/59] KVM: VMX: Move .get_interrupt_shadow() implementation to common VMX code isaku.yamahata
2021-11-25 20:26 ` Thomas Gleixner
2021-11-25 0:20 ` [RFC PATCH v3 53/59] KVM: x86: Add a helper function to restore 4 host MSRs on exit to user space isaku.yamahata
2021-11-25 20:34 ` Thomas Gleixner
2021-11-26 9:19 ` Chao Gao
2021-11-26 9:40 ` Paolo Bonzini
2021-11-29 7:08 ` Lai Jiangshan
2021-11-29 9:26 ` Chao Gao
2021-11-30 4:58 ` Lai Jiangshan
2021-11-30 8:19 ` Chao Gao
2021-11-30 11:18 ` Lai Jiangshan
2021-11-25 0:20 ` [RFC PATCH v3 54/59] KVM: X86: Introduce initial_tsc_khz in struct kvm_arch isaku.yamahata
2021-11-25 20:48 ` Paolo Bonzini
2021-11-25 21:05 ` Thomas Gleixner
2021-11-25 22:13 ` Paolo Bonzini
2021-11-25 22:59 ` Thomas Gleixner
2021-11-25 23:26 ` Thomas Gleixner
2021-11-26 7:56 ` Paolo Bonzini
2021-11-29 23:38 ` Sean Christopherson
2021-11-25 0:20 ` [RFC PATCH v3 55/59] KVM: TDX: Add "basic" support for building and running Trust Domains isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 56/59] KVM: TDX: Protect private mapping related SEAMCALLs with spinlock isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 57/59] KVM, x86/mmu: Support TDX private mapping for TDP MMU isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 58/59] KVM: TDX: exit to user space on GET_QUOTE, SETUP_EVENT_NOTIFY_INTERRUPT isaku.yamahata
2021-11-25 0:20 ` [RFC PATCH v3 59/59] Documentation/virtual/kvm: Add Trust Domain Extensions(TDX) isaku.yamahata
2021-11-25 2:12 ` [RFC PATCH v3 00/59] KVM: X86: TDX support Xiaoyao Li
2021-11-30 18:51 ` Sean Christopherson
2021-12-01 13:22 ` Kai Huang
2021-12-01 19:08 ` Isaku Yamahata
2021-12-01 19:32 ` Sean Christopherson
2021-12-01 20:28 ` Kai Huang
2021-12-01 15:05 ` Paolo Bonzini
2021-12-01 20:16 ` Kai Huang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=d089468157dddab3e231a4d757aa1770b380224d.1637799475.git.isaku.yamahata@intel.com \
--to=isaku.yamahata@intel.com \
--cc=bp@alien8.de \
--cc=ckuehl@redhat.com \
--cc=erdemaktas@google.com \
--cc=hpa@zytor.com \
--cc=isaku.yamahata@gmail.com \
--cc=jmattson@google.com \
--cc=joro@8bytes.org \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=pbonzini@redhat.com \
--cc=seanjc@google.com \
--cc=tglx@linutronix.de \
--cc=vkuznets@redhat.com \
--cc=wanpengli@tencent.com \
--cc=xiaoyao.li@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).