netdev - [PATCH v8 13/20] virt: geniezone: Add dtb config support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Thu, 28 Dec 2023 18:51:40 +0800
From: Yi-De Wu <yi-de.wu@...iatek.com>
To: Yingshiuan Pan <yingshiuan.pan@...iatek.com>, Ze-Yu Wang
	<ze-yu.wang@...iatek.com>, Yi-De Wu <yi-de.wu@...iatek.com>, Rob Herring
	<robh+dt@...nel.org>, Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
	Jonathan Corbet <corbet@....net>, Catalin Marinas <catalin.marinas@....com>,
	Wihl Deacon <will@...nel.org>, Steven Rostedt <rostedt@...dmis.org>, "Masami
 Hiramatsu" <mhiramat@...nel.org>, Mathieu Desnoyers
	<mathieu.desnoyers@...icios.com>, Richard Cochran <richardcochran@...il.com>,
	Matthias Brugger <matthias.bgg@...il.com>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-doc@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-trace-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
	<linux-mediatek@...ts.infradead.org>, David Bradil <dbrazdil@...gle.com>,
	Trilok Soni <quic_tsoni@...cinc.com>, Jade Shih <jades.shih@...iatek.com>,
	Ivan Tseng <ivan.tseng@...iatek.com>, My Chuang <my.chuang@...iatek.com>,
	Shawn Hsiao <shawn.hsiao@...iatek.com>, PeiLun Suei
	<peilun.suei@...iatek.com>, Liju Chen <liju-clr.chen@...iatek.com>, "Willix
 Yeh" <chi-shen.yeh@...iatek.com>, Kevenny Hsieh <kevenny.hsieh@...iatek.com>
Subject: [PATCH v8 13/20] virt: geniezone: Add dtb config support

From: "Jerry Wang" <ze-yu.wang@...iatek.com>

Hypervisor might need to know the accurate address and size of dtb
passed from userspace. And then hypervisor would parse the dtb and get
vm information.

Signed-off-by: Jerry Wang <ze-yu.wang@...iatek.com>
Signed-off-by: Liju-clr Chen <liju-clr.chen@...iatek.com>
Signed-off-by: Yi-De Wu <yi-de.wu@...iatek.com>
---
 arch/arm64/geniezone/gzvm_arch_common.h |  2 ++
 arch/arm64/geniezone/vm.c               |  9 +++++++++
 drivers/virt/geniezone/gzvm_vm.c        | 10 ++++++++++
 include/linux/gzvm_drv.h                |  1 +
 include/uapi/linux/gzvm.h               | 14 ++++++++++++++
 5 files changed, 36 insertions(+)

diff --git a/arch/arm64/geniezone/gzvm_arch_common.h b/arch/arm64/geniezone/gzvm_arch_common.h
index 8d1406beeaed..afb91713fc45 100644
--- a/arch/arm64/geniezone/gzvm_arch_common.h
+++ b/arch/arm64/geniezone/gzvm_arch_common.h
@@ -23,6 +23,7 @@ enum {
 	GZVM_FUNC_ENABLE_CAP = 13,
 	GZVM_FUNC_INFORM_EXIT = 14,
 	GZVM_FUNC_MEMREGION_PURPOSE = 15,
+	GZVM_FUNC_SET_DTB_CONFIG = 16,
 	NR_GZVM_FUNC,
 };
 
@@ -46,6 +47,7 @@ enum {
 #define MT_HVC_GZVM_ENABLE_CAP		GZVM_HCALL_ID(GZVM_FUNC_ENABLE_CAP)
 #define MT_HVC_GZVM_INFORM_EXIT		GZVM_HCALL_ID(GZVM_FUNC_INFORM_EXIT)
 #define MT_HVC_GZVM_MEMREGION_PURPOSE	GZVM_HCALL_ID(GZVM_FUNC_MEMREGION_PURPOSE)
+#define MT_HVC_GZVM_SET_DTB_CONFIG	GZVM_HCALL_ID(GZVM_FUNC_SET_DTB_CONFIG)
 
 #define GIC_V3_NR_LRS			16
 
diff --git a/arch/arm64/geniezone/vm.c b/arch/arm64/geniezone/vm.c
index 210f7569d7cc..4ca2ec43b37c 100644
--- a/arch/arm64/geniezone/vm.c
+++ b/arch/arm64/geniezone/vm.c
@@ -140,6 +140,15 @@ int gzvm_arch_memregion_purpose(struct gzvm *gzvm,
 				    mem->flags, 0, 0, 0, &res);
 }
 
+int gzvm_arch_set_dtb_config(struct gzvm *gzvm, struct gzvm_dtb_config *cfg)
+{
+	struct arm_smccc_res res;
+
+	return gzvm_hypcall_wrapper(MT_HVC_GZVM_SET_DTB_CONFIG, gzvm->vm_id,
+				    cfg->dtb_addr, cfg->dtb_size, 0, 0, 0, 0,
+				    &res);
+}
+
 static int gzvm_vm_arch_enable_cap(struct gzvm *gzvm,
 				   struct gzvm_enable_cap *cap,
 				   struct arm_smccc_res *res)
diff --git a/drivers/virt/geniezone/gzvm_vm.c b/drivers/virt/geniezone/gzvm_vm.c
index 4134605cbf7d..538549ef405c 100644
--- a/drivers/virt/geniezone/gzvm_vm.c
+++ b/drivers/virt/geniezone/gzvm_vm.c
@@ -250,6 +250,16 @@ static long gzvm_vm_ioctl(struct file *filp, unsigned int ioctl,
 		ret = gzvm_vm_ioctl_enable_cap(gzvm, &cap, argp);
 		break;
 	}
+	case GZVM_SET_DTB_CONFIG: {
+		struct gzvm_dtb_config cfg;
+
+		if (copy_from_user(&cfg, argp, sizeof(cfg))) {
+			ret = -EFAULT;
+			goto out;
+		}
+		ret = gzvm_arch_set_dtb_config(gzvm, &cfg);
+		break;
+	}
 	default:
 		ret = -ENOTTY;
 	}
diff --git a/include/linux/gzvm_drv.h b/include/linux/gzvm_drv.h
index d35ca179b688..43d85dc5d7c0 100644
--- a/include/linux/gzvm_drv.h
+++ b/include/linux/gzvm_drv.h
@@ -154,6 +154,7 @@ void gzvm_vm_irqfd_release(struct gzvm *gzvm);
 
 int gzvm_arch_memregion_purpose(struct gzvm *gzvm,
 				struct gzvm_userspace_memory_region *mem);
+int gzvm_arch_set_dtb_config(struct gzvm *gzvm, struct gzvm_dtb_config *args);
 
 int gzvm_init_ioeventfd(struct gzvm *gzvm);
 int gzvm_ioeventfd(struct gzvm *gzvm, struct gzvm_ioeventfd *args);
diff --git a/include/uapi/linux/gzvm.h b/include/uapi/linux/gzvm.h
index ef433e311fa7..f4f04403d5b3 100644
--- a/include/uapi/linux/gzvm.h
+++ b/include/uapi/linux/gzvm.h
@@ -360,4 +360,18 @@ struct gzvm_ioeventfd {
 
 #define GZVM_IOEVENTFD	_IOW(GZVM_IOC_MAGIC, 0x79, struct gzvm_ioeventfd)
 
+/**
+ * struct gzvm_dtb_config: store address and size of dtb passed from userspace
+ *
+ * @dtb_addr: dtb address set by VMM (guset memory)
+ * @dtb_size: dtb size
+ */
+struct gzvm_dtb_config {
+	__u64 dtb_addr;
+	__u64 dtb_size;
+};
+
+#define GZVM_SET_DTB_CONFIG       _IOW(GZVM_IOC_MAGIC, 0xff, \
+				       struct gzvm_dtb_config)
+
 #endif /* __GZVM_H__ */
-- 
2.18.0