From 5e0b3f3b27731f660612249b74b520f1bce6c198 Mon Sep 17 00:00:00 2001 From: Xiong Zhang Date: Mon, 27 May 2019 13:45:50 +0800 Subject: [PATCH] drm/i915/gvt: refine ggtt range validation The vgpu ggtt range should be in vgpu aperture or hidden range. This patch enforce begin and end address check and guarantee both of them are in the valid range. For size=0, it will regress to vgpu_gmadr_is_valid(), will refine this usage in a later fix. Fixes: 2707e4446688 ("drm/i915/gvt: vGPU graphics memory virtualization") Reviewed-by: Zhenyu Wang Signed-off-by: Xiong Zhang Signed-off-by: Zhenyu Wang --- drivers/gpu/drm/i915/gvt/gtt.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c index f3a75bb9ec27..d767c45a57e2 100644 --- a/drivers/gpu/drm/i915/gvt/gtt.c +++ b/drivers/gpu/drm/i915/gvt/gtt.c @@ -53,13 +53,19 @@ static int preallocated_oos_pages = 8192; */ bool intel_gvt_ggtt_validate_range(struct intel_vgpu *vgpu, u64 addr, u32 size) { - if ((!vgpu_gmadr_is_valid(vgpu, addr)) || (size - && !vgpu_gmadr_is_valid(vgpu, addr + size - 1))) { - gvt_vgpu_err("invalid range gmadr 0x%llx size 0x%x\n", - addr, size); - return false; - } - return true; + if (size == 0) + return vgpu_gmadr_is_valid(vgpu, addr); + + if (vgpu_gmadr_is_aperture(vgpu, addr) && + vgpu_gmadr_is_aperture(vgpu, addr + size - 1)) + return true; + else if (vgpu_gmadr_is_hidden(vgpu, addr) && + vgpu_gmadr_is_hidden(vgpu, addr + size - 1)) + return true; + + gvt_dbg_mm("Invalid ggtt range at 0x%llx, size: 0x%x\n", + addr, size); + return false; } /* translate a guest gmadr to host gmadr */ -- 2.30.2