75 lines
2.4 KiB
Diff
75 lines
2.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Junming Liu <junming.liu@intel.com>
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Date: Fri, 8 Nov 2019 15:45:06 +0000
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Subject: [PATCH] drm/i915/gvt:Expose vgpu bar0 and bar2 information
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Expose vgpu bar0 and bar2 information. In the next design,
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ACRN-DM will need vgpu bar information.
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/sys/kernel/gvt/vmx/vgpu_bar_info expose vgpu bar info.
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If the value is:
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0x00000000de000000 0x0000000001000000
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0x00000000c0000000 0x0000000010000000
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then:
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bar0 start addr: 0x00000000de000000
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bar0 size: 0x0000000001000000
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bar2 start addr: 0x00000000c0000000
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bar2 size: 0x0000000010000000
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Tracked-On: projectacrn/acrn-hypervisor#4005
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Signed-off-by: Junming Liu <junming.liu@intel.com>
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Reviewed-by: Zhao Yakui <yakui.zhao@intel.com>
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Reviewed-by: Liu XinYun <xinyun.liu@intel.com>
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Signed-off-by: Junxiao Chang <junxiao.chang@intel.com>
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---
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drivers/gpu/drm/i915/gvt/acrngt.c | 26 ++++++++++++++++++++++++++
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1 file changed, 26 insertions(+)
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diff --git a/drivers/gpu/drm/i915/gvt/acrngt.c b/drivers/gpu/drm/i915/gvt/acrngt.c
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index 80b4df4e16dd..bdec6b7daa29 100644
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--- a/drivers/gpu/drm/i915/gvt/acrngt.c
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+++ b/drivers/gpu/drm/i915/gvt/acrngt.c
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@@ -415,12 +415,38 @@ static ssize_t acrngt_sysfs_vgpu_id(struct kobject *kobj,
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return 0;
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}
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+static ssize_t acrngt_sysfs_vgpu_bar_info(struct kobject *kobj,
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+ struct kobj_attribute *attr, char *buf)
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+{
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+ u64 bar0_start, bar0_len, bar2_start, bar2_len;
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+ u64 mask;
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+ struct acrngt_hvm_dev *info;
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+ struct intel_vgpu *vgpu;
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+
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+ info = container_of(kobj, struct acrngt_hvm_dev, kobj);
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+ if (!info || !info->vgpu)
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+ return 0;
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+ vgpu = info->vgpu;
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+ mask = ~(0xf);
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+ /* clear last four bits according to PCI spec */
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+ bar0_start = *(u64 *)(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_0) & mask;
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+ bar0_len = vgpu->cfg_space.bar[0].size;
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+ bar2_start = *(u64 *)(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_2) & mask;
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+ bar2_len = vgpu->cfg_space.bar[1].size;
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+ return sprintf(buf, "0x%016llx 0x%016llx\n0x%016llx 0x%016llx\n",
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+ bar0_start, bar0_len, bar2_start, bar2_len);
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+}
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+
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static struct kobj_attribute acrngt_vm_attr =
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__ATTR(vgpu_id, 0440, acrngt_sysfs_vgpu_id, NULL);
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+static struct kobj_attribute acrngt_vgpu_bar_info =
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+__ATTR(vgpu_bar_info, 0440, acrngt_sysfs_vgpu_bar_info, NULL);
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+
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static struct attribute *acrngt_vm_attrs[] = {
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&acrngt_vm_attr.attr,
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+ &acrngt_vgpu_bar_info.attr,
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NULL, /* need to NULL terminate the list of attributes */
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};
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--
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https://clearlinux.org
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