From f74a6d9a2c427b6656bc93eacfa6d329ba54d611 Mon Sep 17 00:00:00 2001 From: Zhao Yakui Date: Wed, 20 Feb 2019 12:07:44 +0800 Subject: [PATCH] drm/i915/gvt: Refine the snapshort range of I915 MCHBAR to optimize gvt-g boot time Currently it will take the snapshot of the MCHBAR registers for gvt-g initialization so that it can be used for guest vgpu. And it will cover from 0x140000 to 0x17ffff. In fact based on the HW spec most of them are meanlingless and some time is wasted to read these register. Only the range of 0x144000 to 0x147fff contains the valid definition. So the range of capturing I915 MCHBAR register is refined, which helps to optimize the gvt-g boot time. V1->V2: Move the register definition into reg.h Signed-off-by: Zhao Yakui Acked-by: Zhenyu Wang Signed-off-by: Zhenyu Wang --- drivers/gpu/drm/i915/gvt/handlers.c | 2 +- drivers/gpu/drm/i915/gvt/reg.h | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c index 9c106e47e640a..65ee8ed0e2061 100644 --- a/drivers/gpu/drm/i915/gvt/handlers.c +++ b/drivers/gpu/drm/i915/gvt/handlers.c @@ -3264,7 +3264,7 @@ void intel_gvt_clean_mmio_info(struct intel_gvt *gvt) /* Special MMIO blocks. */ static struct gvt_mmio_block mmio_blocks[] = { {D_SKL_PLUS, _MMIO(CSR_MMIO_START_RANGE), 0x3000, NULL, NULL}, - {D_ALL, _MMIO(MCHBAR_MIRROR_BASE_SNB), 0x40000, NULL, NULL}, + {D_ALL, MCHBAR_MIRROR_REG_BASE, 0x4000, NULL, NULL}, {D_ALL, _MMIO(VGT_PVINFO_PAGE), VGT_PVINFO_SIZE, pvinfo_mmio_read, pvinfo_mmio_write}, {D_ALL, LGC_PALETTE(PIPE_A, 0), 1024, NULL, NULL}, diff --git a/drivers/gpu/drm/i915/gvt/reg.h b/drivers/gpu/drm/i915/gvt/reg.h index 428d252344f1e..56cff20eba449 100644 --- a/drivers/gpu/drm/i915/gvt/reg.h +++ b/drivers/gpu/drm/i915/gvt/reg.h @@ -95,4 +95,7 @@ #define RING_GFX_MODE(base) _MMIO((base) + 0x29c) #define VF_GUARDBAND _MMIO(0x83a4) +/* define the effective range of MCHBAR register on Sandybridge+ */ +#define MCHBAR_MIRROR_REG_BASE _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x4000) + #endif -- 2.39.5