From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Peter Zijlstra <peterz@infradead.org>,
Andy Lutomirski <luto@kernel.org>,
Hans de Goede <hdegoede@redhat.com>,
Mark Gross <mgross@linux.intel.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>
Cc: Peter H Anvin <hpa@zytor.com>,
Dave Hansen <dave.hansen@intel.com>,
Tony Luck <tony.luck@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Andi Kleen <ak@linux.intel.com>,
Kirill Shutemov <kirill.shutemov@linux.intel.com>,
Sean Christopherson <seanjc@google.com>,
Kuppuswamy Sathyanarayanan <knsathya@kernel.org>,
x86@kernel.org, linux-kernel@vger.kernel.org,
platform-driver-x86@vger.kernel.org, bpf@vger.kernel.org,
netdev@vger.kernel.org
Subject: [PATCH v2 3/6] x86/tdx: Add SetupEventNotifyInterrupt TDX hypercall support
Date: Wed, 7 Jul 2021 13:42:46 -0700 [thread overview]
Message-ID: <20210707204249.3046665-4-sathyanarayanan.kuppuswamy@linux.intel.com> (raw)
In-Reply-To: <20210707204249.3046665-1-sathyanarayanan.kuppuswamy@linux.intel.com>
SetupEventNotifyInterrupt TDX hypercall is used by guest TD to specify
which interrupt vector to use as an event-notify vector to the VMM.
Such registered vector is also used by Host VMM to notify about
completion of GetQuote requests to the Guest TD.
Add tdx_hcall_set_notify_intr() helper function to implement the
SetupEventNotifyInterrupt hypercall.
This will be used by the TD quote driver.
Details about the SetupEventNotifyInterrupt TDVMCALL can be found in
TDX Guest-Host Communication Interface (GHCI) Specification, sec 3.5
"TDG.VP.VMCALL<SetupEventNotifyInterrupt>".
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---
arch/x86/kernel/tdx.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/arch/x86/kernel/tdx.c b/arch/x86/kernel/tdx.c
index eb3a90051604..fcb0ed70ea19 100644
--- a/arch/x86/kernel/tdx.c
+++ b/arch/x86/kernel/tdx.c
@@ -29,6 +29,7 @@
/* TDX hypercall Leaf IDs */
#define TDVMCALL_MAP_GPA 0x10001
#define TDVMCALL_GET_QUOTE 0x10002
+#define TDVMCALL_SETUP_NOTIFY_INTR 0x10004
/* TDX Module call error codes */
#define TDX_PAGE_ALREADY_ACCEPTED 0x8000000000000001
@@ -202,6 +203,30 @@ int tdx_hcall_get_quote(u64 data)
}
EXPORT_SYMBOL_GPL(tdx_hcall_get_quote);
+/*
+ * tdx_hcall_set_notify_intr() - Setup Event Notify Interrupt Vector.
+ *
+ * @vector : Vector address to be used for notification.
+ *
+ * return 0 on success or failure error number.
+ */
+int tdx_hcall_set_notify_intr(u8 vector)
+{
+ u64 ret;
+
+ /* Minimum vector value allowed is 32 */
+ if (vector < 32)
+ return -EINVAL;
+
+ ret = _trace_tdx_hypercall(TDVMCALL_SETUP_NOTIFY_INTR, vector, 0, 0, 0,
+ NULL);
+
+ if (ret == TDCALL_INVALID_OPERAND)
+ return -EINVAL;
+
+ return 0;
+}
+
static void tdg_get_info(void)
{
u64 ret;
--
2.25.1
next prev parent reply other threads:[~2021-07-07 20:43 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-07 20:42 [PATCH v2 0/6] Add TDX Guest Support (Attestation support) Kuppuswamy Sathyanarayanan
2021-07-07 20:42 ` [PATCH v2 1/6] x86/tdx: Add TDREPORT TDX Module call support Kuppuswamy Sathyanarayanan
2021-07-08 8:16 ` Xiaoyao Li
2021-07-08 14:07 ` Kuppuswamy, Sathyanarayanan
2021-07-08 14:20 ` Hans de Goede
2021-07-08 17:06 ` Kuppuswamy, Sathyanarayanan
2021-07-07 20:42 ` [PATCH v2 2/6] x86/tdx: Add GetQuote TDX hypercall support Kuppuswamy Sathyanarayanan
2021-07-07 20:42 ` Kuppuswamy Sathyanarayanan [this message]
2021-07-07 20:42 ` [PATCH v2 4/6] x86/tdx: Add TDX Guest event notify interrupt vector support Kuppuswamy Sathyanarayanan
2021-07-07 20:42 ` [PATCH v2 5/6] platform/x86: intel_tdx_attest: Add TDX Guest attestation interface driver Kuppuswamy Sathyanarayanan
2021-07-08 22:21 ` Andy Lutomirski
2021-07-08 22:35 ` Dave Hansen
2021-07-09 0:38 ` Andi Kleen
2021-07-13 0:33 ` Kuppuswamy, Sathyanarayanan
2021-07-13 0:44 ` Dave Hansen
2021-07-08 23:34 ` Kuppuswamy, Sathyanarayanan
2021-07-08 23:36 ` Dan Williams
2021-07-08 23:57 ` Kuppuswamy, Sathyanarayanan
2021-07-09 0:20 ` Dan Williams
2021-07-09 0:36 ` Andi Kleen
2021-07-09 1:37 ` Dan Williams
2021-07-09 1:44 ` Andi Kleen
2021-07-09 2:04 ` Dan Williams
2021-07-09 2:43 ` Kuppuswamy, Sathyanarayanan
2021-07-07 20:42 ` [PATCH v2 6/6] tools/tdx: Add a sample attestation user app Kuppuswamy Sathyanarayanan
2021-07-15 8:36 ` Mian Yousaf Kaukab
2021-07-15 15:19 ` Kuppuswamy, Sathyanarayanan
2022-03-30 22:17 [PATCH v2 0/6] Add TDX Guest Attestation support Kuppuswamy Sathyanarayanan
2022-03-30 22:18 ` [PATCH v2 3/6] x86/tdx: Add SetupEventNotifyInterrupt TDX hypercall support Kuppuswamy Sathyanarayanan
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