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Message-ID: <20231116152756.4250-13-yi-de.wu@mediatek.com>
Date: Thu, 16 Nov 2023 23:27:52 +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>,
Will Deacon <will@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
CC: Arnd Bergmann <arnd@...db.de>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.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 v7 12/16] 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 6c4179568a1b..ca503be01aa3 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 cab6468948e3..78b5e22604c3 100644
--- a/arch/arm64/geniezone/vm.c
+++ b/arch/arm64/geniezone/vm.c
@@ -133,6 +133,15 @@ 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
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