From: shuo.a.liu@intel.com
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"H . Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Sean Christopherson <sean.j.christopherson@intel.com>,
Yu Wang <yu1.wang@intel.com>,
Reinette Chatre <reinette.chatre@intel.com>,
x86@kernel.org, Shuo Liu <shuo.a.liu@intel.com>,
Yakui Zhao <yakui.zhao@intel.com>,
Zhi Wang <zhi.a.wang@intel.com>,
Dave Hansen <dave.hansen@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Fengwei Yin <fengwei.yin@intel.com>,
Zhenyu Wang <zhenyuw@linux.intel.com>
Subject: [PATCH 02/17] x86/acrn: Introduce acrn_{setup, remove}_intr_handler()
Date: Tue, 25 Aug 2020 10:45:02 +0800 [thread overview]
Message-ID: <20200825024516.16766-3-shuo.a.liu@intel.com> (raw)
In-Reply-To: <20200825024516.16766-1-shuo.a.liu@intel.com>
From: Shuo Liu <shuo.a.liu@intel.com>
The ACRN Hypervisor builds an I/O request when a trapped I/O access
happens in User VM. Then, ACRN Hypervisor issues an upcall by sending
a notification interrupt to the Service VM. HSM in the Service VM needs
to hook the notification interrupt to handle I/O requests.
Notification interrupts from ACRN Hypervisor are already supported and
a, currently uninitialized, callback called.
Export two APIs for HSM to setup/remove its callback.
Originally-by: Yakui Zhao <yakui.zhao@intel.com>
Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Fengwei Yin <fengwei.yin@intel.com>
Cc: Zhi Wang <zhi.a.wang@intel.com>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Yu Wang <yu1.wang@intel.com>
Cc: Reinette Chatre <reinette.chatre@intel.com>
---
arch/x86/include/asm/acrn.h | 8 ++++++++
arch/x86/kernel/cpu/acrn.c | 19 +++++++++++++++++++
2 files changed, 27 insertions(+)
create mode 100644 arch/x86/include/asm/acrn.h
diff --git a/arch/x86/include/asm/acrn.h b/arch/x86/include/asm/acrn.h
new file mode 100644
index 000000000000..ff259b69cde7
--- /dev/null
+++ b/arch/x86/include/asm/acrn.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_ACRN_H
+#define _ASM_X86_ACRN_H
+
+void acrn_setup_intr_handler(void (*handler)(void));
+void acrn_remove_intr_handler(void);
+
+#endif /* _ASM_X86_ACRN_H */
diff --git a/arch/x86/kernel/cpu/acrn.c b/arch/x86/kernel/cpu/acrn.c
index 0b2c03943ac6..bd1d7e759a0f 100644
--- a/arch/x86/kernel/cpu/acrn.c
+++ b/arch/x86/kernel/cpu/acrn.c
@@ -9,7 +9,11 @@
*
*/
+#define pr_fmt(fmt) "acrn: " fmt
+
#include <linux/interrupt.h>
+
+#include <asm/acrn.h>
#include <asm/apic.h>
#include <asm/cpufeatures.h>
#include <asm/desc.h>
@@ -55,6 +59,21 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_acrn_hv_callback)
set_irq_regs(old_regs);
}
+void acrn_setup_intr_handler(void (*handler)(void))
+{
+ if (acrn_intr_handler)
+ pr_warn("Overwrite the acrn_intr_handler.\n");
+
+ acrn_intr_handler = handler;
+}
+EXPORT_SYMBOL_GPL(acrn_setup_intr_handler);
+
+void acrn_remove_intr_handler(void)
+{
+ acrn_intr_handler = NULL;
+}
+EXPORT_SYMBOL_GPL(acrn_remove_intr_handler);
+
const __initconst struct hypervisor_x86 x86_hyper_acrn = {
.name = "ACRN",
.detect = acrn_detect,
--
2.28.0
next prev parent reply other threads:[~2020-08-25 2:50 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-25 2:45 [PATCH 00/17] HSM driver for ACRN hypervisor shuo.a.liu
2020-08-25 2:45 ` [PATCH 01/17] docs: acrn: Introduce ACRN shuo.a.liu
2020-08-25 2:45 ` shuo.a.liu [this message]
2020-08-25 2:45 ` [PATCH 03/17] x86/acrn: Introduce an API to check if a VM is privileged shuo.a.liu
2020-08-25 2:45 ` [PATCH 04/17] x86/acrn: Introduce hypercall interfaces shuo.a.liu
2020-08-25 2:45 ` [PATCH 05/17] virt: acrn: Introduce ACRN HSM basic driver shuo.a.liu
2020-08-28 10:25 ` Greg Kroah-Hartman
2020-08-29 10:46 ` Shuo A Liu
2020-08-29 16:12 ` Dave Hansen
2020-08-30 8:16 ` Shuo A Liu
2020-08-25 2:45 ` [PATCH 06/17] virt: acrn: Introduce VM management interfaces shuo.a.liu
2020-08-28 10:27 ` Greg Kroah-Hartman
2020-08-29 10:55 ` Shuo A Liu
2020-08-28 10:27 ` Greg Kroah-Hartman
2020-08-29 11:04 ` Shuo A Liu
2020-08-30 7:23 ` Greg Kroah-Hartman
2020-08-31 6:25 ` Shuo A Liu
2020-08-25 2:45 ` [PATCH 07/17] virt: acrn: Introduce an ioctl to set vCPU registers state shuo.a.liu
2020-08-25 2:45 ` [PATCH 08/17] virt: acrn: Introduce EPT mapping management shuo.a.liu
2020-08-25 2:45 ` [PATCH 09/17] virt: acrn: Introduce I/O request management shuo.a.liu
2020-08-25 2:45 ` [PATCH 10/17] virt: acrn: Introduce PCI configuration space PIO accesses combiner shuo.a.liu
2020-08-25 2:45 ` [PATCH 11/17] virt: acrn: Introduce interfaces for PCI device passthrough shuo.a.liu
2020-08-25 2:45 ` [PATCH 12/17] virt: acrn: Introduce interrupt injection interfaces shuo.a.liu
2020-08-25 2:45 ` [PATCH 13/17] virt: acrn: Introduce interfaces to query C-states and P-states allowed by hypervisor shuo.a.liu
2020-08-25 2:45 ` [PATCH 14/17] virt: acrn: Introduce I/O ranges operation interfaces shuo.a.liu
2020-08-25 2:45 ` [PATCH 15/17] virt: acrn: Introduce ioeventfd shuo.a.liu
2020-08-25 2:45 ` [PATCH 16/17] virt: acrn: Introduce irqfd shuo.a.liu
2020-08-25 2:45 ` [PATCH 17/17] virt: acrn: Introduce an interface for Service VM to control vCPU shuo.a.liu
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