From: yakui.zhao@intel.com (Zhao Yakui)
Subject: [RFC PATCH 03/15] x86/acrn: Add hypercall for ACRN guest
Date: Fri, 16 Aug 2019 10:25:44 +0800 [thread overview]
Message-ID: <1565922356-4488-4-git-send-email-yakui.zhao@intel.com> (raw)
In-Reply-To: <1565922356-4488-1-git-send-email-yakui.zhao@intel.com>
When ACRN hypervisor is detected, the hypercall is needed so that the
ACRN guest can query/config some settings. For example: it can be used
to query the resources in hypervisor and manage the CPU/memory/device/
interrupt for guest operating system.
On x86 it is implemented with the VMCALL instruction.
Co-developed-by: Jason Chen CJ <jason.cj.chen at intel.com>
Signed-off-by: Jason Chen CJ <jason.cj.chen at intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao at intel.com>
---
arch/x86/include/asm/acrn.h | 54 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/arch/x86/include/asm/acrn.h b/arch/x86/include/asm/acrn.h
index 857e6244..ab97c3d 100644
--- a/arch/x86/include/asm/acrn.h
+++ b/arch/x86/include/asm/acrn.h
@@ -11,4 +11,58 @@ extern void acrn_hv_vector_handler(struct pt_regs *regs);
extern void acrn_setup_intr_irq(void (*handler)(void));
extern void acrn_remove_intr_irq(void);
+
+/*
+ * Hypercalls for ACRN guest
+ *
+ * Hypercall number is passed in R8 register.
+ * Up to 2 arguments are passed in RDI, RSI.
+ * Return value will be placed in RAX.
+ */
+static inline long acrn_hypercall0(unsigned long hcall_id)
+{
+ long result;
+
+ /* the hypercall is implemented with the VMCALL instruction.
+ * volatile qualifier is added to avoid that it is dropped
+ * because of compiler optimization.
+ */
+ asm volatile("movq %[hcall_id], %%r8\n\t"
+ "vmcall\n\t"
+ : "=a" (result)
+ : [hcall_id] "g" (hcall_id)
+ : "r8");
+
+ return result;
+}
+
+static inline long acrn_hypercall1(unsigned long hcall_id,
+ unsigned long param1)
+{
+ long result;
+
+ asm volatile("movq %[hcall_id], %%r8\n\t"
+ "vmcall\n\t"
+ : "=a" (result)
+ : [hcall_id] "g" (hcall_id), "D" (param1)
+ : "r8");
+
+ return result;
+}
+
+static inline long acrn_hypercall2(unsigned long hcall_id,
+ unsigned long param1,
+ unsigned long param2)
+{
+ long result;
+
+ asm volatile("movq %[hcall_id], %%r8\n\t"
+ "vmcall\n\t"
+ : "=a" (result)
+ : [hcall_id] "g" (hcall_id), "D" (param1), "S" (param2)
+ : "r8");
+
+ return result;
+}
+
#endif /* _ASM_X86_ACRN_H */
--
2.7.4
next prev parent reply other threads:[~2019-08-16 2:25 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-16 2:25 [RFC PATCH 00/15] acrn: add the ACRN driver module Zhao Yakui
2019-08-16 2:25 ` [RFC PATCH 01/15] x86/acrn: Report X2APIC for ACRN guest Zhao Yakui
2019-08-16 2:25 ` [RFC PATCH 02/15] x86/acrn: Add two APIs to add/remove driver-specific upcall ISR handler Zhao Yakui
2019-08-16 2:25 ` Zhao Yakui [this message]
2019-08-16 2:25 ` [RFC PATCH 04/15] drivers/acrn: add the basic framework of acrn char device driver Zhao Yakui
2019-08-16 7:05 ` Greg KH
2019-08-19 4:02 ` Zhao, Yakui
2019-08-19 5:26 ` Greg KH
2019-08-16 11:28 ` Dan Carpenter
2019-08-16 2:25 ` [RFC PATCH 05/15] drivers/acrn: add driver-specific hypercall for ACRN_HSM Zhao Yakui
2019-08-16 2:25 ` [RFC PATCH 06/15] drivers/acrn: add the support of querying ACRN api version Zhao Yakui
2019-08-16 2:25 ` [RFC PATCH 07/15] drivers/acrn: add acrn vm/vcpu management for ACRN_HSM char device Zhao Yakui
2019-08-16 2:25 ` [RFC PATCH 08/15] drivers/acrn: add VM memory management for ACRN " Zhao Yakui
2019-08-16 12:58 ` Dan Carpenter
2019-08-19 5:32 ` Zhao, Yakui
2019-08-19 7:39 ` Dan Carpenter
2019-08-19 7:46 ` Borislav Petkov
2019-08-20 2:25 ` Zhao, Yakui
2019-08-16 2:25 ` [RFC PATCH 09/15] drivers/acrn: add passthrough device support Zhao Yakui
2019-08-16 13:05 ` Dan Carpenter
2019-09-02 0:18 ` Zhao, Yakui
2019-08-16 2:25 ` [RFC PATCH 10/15] drivers/acrn: add interrupt injection support Zhao Yakui
2019-08-16 13:12 ` Dan Carpenter
2019-08-19 4:59 ` Zhao, Yakui
2019-08-16 2:25 ` [RFC PATCH 11/15] drivers/acrn: add the support of handling emulated ioreq Zhao Yakui
2019-08-16 13:39 ` Dan Carpenter
2019-08-19 4:54 ` Zhao, Yakui
2019-08-16 2:25 ` [RFC PATCH 12/15] drivers/acrn: add driver-specific IRQ handle to dispatch IO_REQ request Zhao Yakui
2019-08-16 2:25 ` [RFC PATCH 13/15] drivers/acrn: add service to obtain Power data transition Zhao Yakui
2019-08-16 2:25 ` [RFC PATCH 14/15] drivers/acrn: add the support of irqfd and eventfd Zhao Yakui
2019-08-16 2:25 ` [RFC PATCH 15/15] drivers/acrn: add the support of offline SOS cpu Zhao Yakui
2019-08-19 10:34 ` Dan Carpenter
2019-08-20 2:23 ` Zhao, Yakui
2019-08-16 6:39 ` [RFC PATCH 00/15] acrn: add the ACRN driver module Borislav Petkov
2019-08-16 7:03 ` Greg KH
2019-08-19 2:39 ` Zhao, Yakui
2019-08-19 5:25 ` Greg KH
2019-08-19 1:44 ` Zhao, Yakui
2019-08-19 5:25 ` Greg KH
2019-08-19 5:39 ` Zhao, Yakui
2019-08-19 6:18 ` Borislav Petkov
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