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SUSE:SLE-12-SP4:GA
qemu-linux-user.29142
0350-sm501-Fix-hardware-cursor.patch
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File 0350-sm501-Fix-hardware-cursor.patch of Package qemu-linux-user.29142
From: BALATON Zoltan <balaton@eik.bme.hu> Date: Fri, 21 Apr 2017 17:18:09 +0200 Subject: sm501: Fix hardware cursor Git-commit: 6a2a5aae02b9a0b53807b9ad91f15cd4988781f9 References: bsc#1172385, CVE-2020-12829 Rework HWC handling to simplify it and fix cursor not updating on screen as needed. Previously cursor was not updated because checking for changes in a line overrode the update flag set for the cursor but fixing this is not enough because the cursor should also be updated if its shape or location changes. Introduce hwc_invalidate() function to handle that similar to other display controller models. Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Aurelien Jarno <aurelien@aurel32.net> Message-id: 6970a5e9868b7246656c1d02038dc5d5fa369507.1492787889.git.balaton@eik.bme.hu Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Bruce Rogers <brogers@suse.com> --- hw/display/sm501.c | 191 ++++++++++++++++++++---------------- hw/display/sm501_template.h | 23 ++--- 2 files changed, 117 insertions(+), 97 deletions(-) diff --git a/hw/display/sm501.c b/hw/display/sm501.c index 5f710121085ff8d1ed9d991621aa..4ec4e2e152d63f26be4e9d195661 100644 --- a/hw/display/sm501.c +++ b/hw/display/sm501.c @@ -548,6 +548,24 @@ static uint32_t get_local_mem_size_index(uint32_t size) return index; } +static inline int get_width(SM501State *s, int crt) +{ + int width = crt ? s->dc_crt_h_total : s->dc_panel_h_total; + return (width & 0x00000FFF) + 1; +} + +static inline int get_height(SM501State *s, int crt) +{ + int height = crt ? s->dc_crt_v_total : s->dc_panel_v_total; + return (height & 0x00000FFF) + 1; +} + +static inline int get_bpp(SM501State *s, int crt) +{ + int bpp = crt ? s->dc_crt_control : s->dc_panel_control; + return 1 << (bpp & 3); +} + /** * Check the availability of hardware cursor. * @param crt 0 for PANEL, 1 for CRT. @@ -562,10 +580,10 @@ static inline int is_hwc_enabled(SM501State *state, int crt) * Get the address which holds cursor pattern data. * @param crt 0 for PANEL, 1 for CRT. */ -static inline uint32_t get_hwc_address(SM501State *state, int crt) +static inline uint8_t *get_hwc_address(SM501State *state, int crt) { uint32_t addr = crt ? state->dc_crt_hwc_addr : state->dc_panel_hwc_addr; - return (addr & 0x03FFFFF0)/* >> 4*/; + return state->local_mem + (addr & 0x03FFFFF0); } /** @@ -591,50 +609,48 @@ static inline uint32_t get_hwc_x(SM501State *state, int crt) } /** - * Get the cursor position in x coordinate. + * Get the hardware cursor palette. * @param crt 0 for PANEL, 1 for CRT. - * @param index 0, 1, 2 or 3 which specifies color of corsor dot. + * @param palette pointer to a [3 * 3] array to store color values in */ -static inline uint16_t get_hwc_color(SM501State *state, int crt, int index) +static inline void get_hwc_palette(SM501State *state, int crt, uint8_t *palette) { - uint32_t color_reg = 0; - uint16_t color_565 = 0; - - if (index == 0) { - return 0; - } - - switch (index) { - case 1: - case 2: - color_reg = crt ? state->dc_crt_hwc_color_1_2 - : state->dc_panel_hwc_color_1_2; - break; - case 3: - color_reg = crt ? state->dc_crt_hwc_color_3 - : state->dc_panel_hwc_color_3; - break; - default: - printf("invalid hw cursor color.\n"); - abort(); - } + int i; + uint32_t color_reg; + uint16_t rgb565; + + for (i = 0; i < 3; i++) { + if (i + 1 == 3) { + color_reg = crt ? state->dc_crt_hwc_color_3 + : state->dc_panel_hwc_color_3; + } else { + color_reg = crt ? state->dc_crt_hwc_color_1_2 + : state->dc_panel_hwc_color_1_2; + } - switch (index) { - case 1: - case 3: - color_565 = (uint16_t)(color_reg & 0xFFFF); - break; - case 2: - color_565 = (uint16_t)((color_reg >> 16) & 0xFFFF); - break; + if (i + 1 == 2) { + rgb565 = (color_reg >> 16) & 0xFFFF; + } else { + rgb565 = color_reg & 0xFFFF; + } + palette[i * 3 + 0] = (rgb565 << 3) & 0xf8; /* red */ + palette[i * 3 + 1] = (rgb565 >> 3) & 0xfc; /* green */ + palette[i * 3 + 2] = (rgb565 >> 8) & 0xf8; /* blue */ } - return color_565; } -static int within_hwc_y_range(SM501State *state, int y, int crt) +static inline void hwc_invalidate(SM501State *s, int crt) { - int hwc_y = get_hwc_y(state, crt); - return (hwc_y <= y && y < hwc_y + SM501_HWC_HEIGHT); + int w = get_width(s, crt); + int h = get_height(s, crt); + int bpp = get_bpp(s, crt); + int start = get_hwc_y(s, crt); + int end = MIN(h, start + SM501_HWC_HEIGHT) + 1; + + start *= w * bpp; + end *= w * bpp; + + memory_region_set_dirty(&s->local_mem_region, start, end - start); } static void sm501_2d_operation(SM501State * s) @@ -1009,11 +1025,19 @@ static void sm501_disp_ctrl_write(void *opaque, hwaddr addr, break; case SM501_DC_PANEL_HWC_ADDR: - s->dc_panel_hwc_addr = value & 0x8FFFFFF0; - break; + value &= 0x8FFFFFF0; + if (value != s->dc_panel_hwc_addr) { + hwc_invalidate(s, 0); + s->dc_panel_hwc_addr = value; + } + break; case SM501_DC_PANEL_HWC_LOC: - s->dc_panel_hwc_location = value & 0x0FFF0FFF; - break; + value &= 0x0FFF0FFF; + if (value != s->dc_panel_hwc_location) { + hwc_invalidate(s, 0); + s->dc_panel_hwc_location = value; + } + break; case SM501_DC_PANEL_HWC_COLOR_1_2: s->dc_panel_hwc_color_1_2 = value; break; @@ -1044,11 +1068,19 @@ static void sm501_disp_ctrl_write(void *opaque, hwaddr addr, break; case SM501_DC_CRT_HWC_ADDR: - s->dc_crt_hwc_addr = value & 0x8FFFFFF0; - break; + value &= 0x8FFFFFF0; + if (value != s->dc_crt_hwc_addr) { + hwc_invalidate(s, 1); + s->dc_crt_hwc_addr = value; + } + break; case SM501_DC_CRT_HWC_LOC: - s->dc_crt_hwc_location = value & 0x0FFF0FFF; - break; + value &= 0x0FFF0FFF; + if (value != s->dc_crt_hwc_location) { + hwc_invalidate(s, 1); + s->dc_crt_hwc_location = value; + } + break; case SM501_DC_CRT_HWC_COLOR_1_2: s->dc_crt_hwc_color_1_2 = value; break; @@ -1170,8 +1202,9 @@ static const MemoryRegionOps sm501_2d_engine_ops = { typedef void draw_line_func(uint8_t *d, const uint8_t *s, int width, const uint32_t *pal); -typedef void draw_hwc_line_func(SM501State * s, int crt, uint8_t * palette, - int c_y, uint8_t *d, int width); +typedef void draw_hwc_line_func(uint8_t *d, const uint8_t *s, + int width, const uint8_t *palette, + int c_x, int c_y); #define DEPTH 8 #include "sm501_template.h" @@ -1259,12 +1292,11 @@ static inline int get_depth_index(DisplaySurface *surface) static void sm501_draw_crt(SM501State * s) { DisplaySurface *surface = qemu_console_surface(s->con); - int y; - int width = (s->dc_crt_h_total & 0x00000FFF) + 1; - int height = (s->dc_crt_v_total & 0x00000FFF) + 1; - - uint8_t * src = s->local_mem; - int src_bpp = 0; + int y, c_x = 0, c_y = 0; + uint8_t *hwc_src = NULL, *src = s->local_mem; + int width = get_width(s, 1); + int height = get_height(s, 1); + int src_bpp = get_bpp(s, 1); int dst_bpp = surface_bytes_per_pixel(surface); uint32_t * palette = (uint32_t *)&s->dc_palette[SM501_DC_CRT_PALETTE - SM501_DC_PANEL_PALETTE]; @@ -1279,19 +1311,16 @@ static void sm501_draw_crt(SM501State * s) ram_addr_t offset = 0; /* choose draw_line function */ - switch (s->dc_crt_control & 3) { - case SM501_DC_CRT_CONTROL_8BPP: - src_bpp = 1; - draw_line = draw_line8_funcs[ds_depth_index]; - break; - case SM501_DC_CRT_CONTROL_16BPP: - src_bpp = 2; - draw_line = draw_line16_funcs[ds_depth_index]; - break; - case SM501_DC_CRT_CONTROL_32BPP: - src_bpp = 4; - draw_line = draw_line32_funcs[ds_depth_index]; - break; + switch (src_bpp) { + case 1: + draw_line = draw_line8_funcs[ds_depth_index]; + break; + case 2: + draw_line = draw_line16_funcs[ds_depth_index]; + break; + case 4: + draw_line = draw_line32_funcs[ds_depth_index]; + break; default: printf("sm501 draw crt : invalid DC_CRT_CONTROL=%x.\n", s->dc_crt_control); @@ -1301,18 +1330,12 @@ static void sm501_draw_crt(SM501State * s) /* set up to draw hardware cursor */ if (is_hwc_enabled(s, 1)) { - int i; - - /* get cursor palette */ - for (i = 0; i < 3; i++) { - uint16_t rgb565 = get_hwc_color(s, 1, i + 1); - hwc_palette[i * 3 + 0] = (rgb565 & 0xf800) >> 8; /* red */ - hwc_palette[i * 3 + 1] = (rgb565 & 0x07e0) >> 3; /* green */ - hwc_palette[i * 3 + 2] = (rgb565 & 0x001f) << 3; /* blue */ - } - /* choose cursor draw line function */ draw_hwc_line = draw_hwc_line_funcs[ds_depth_index]; + hwc_src = get_hwc_address(s, 1); + c_x = get_hwc_x(s, 1); + c_y = get_hwc_y(s, 1); + get_hwc_palette(s, 1, hwc_palette); } /* adjust console size */ @@ -1327,14 +1350,16 @@ static void sm501_draw_crt(SM501State * s) /* draw each line according to conditions */ memory_region_sync_dirty_bitmap(&s->local_mem_region); for (y = 0; y < height; y++) { - int update_hwc = draw_hwc_line ? within_hwc_y_range(s, y, 1) : 0; - int update = full_update || update_hwc; + int update, update_hwc; ram_addr_t page0 = offset; ram_addr_t page1 = offset + width * src_bpp - 1; - /* check dirty flags for each line */ - update = memory_region_get_dirty(&s->local_mem_region, page0, - page1 - page0, DIRTY_MEMORY_VGA); + /* check if hardware cursor is enabled and we're within its range */ + update_hwc = draw_hwc_line && c_y <= y && y < c_y + SM501_HWC_HEIGHT; + update = full_update || update_hwc; + /* check dirty flags for each line */ + update |= memory_region_get_dirty(&s->local_mem_region, page0, + page1 - page0, DIRTY_MEMORY_VGA); /* draw line and change status */ if (update) { @@ -1346,7 +1371,7 @@ static void sm501_draw_crt(SM501State * s) /* draw haredware cursor */ if (update_hwc) { - draw_hwc_line(s, 1, hwc_palette, y - get_hwc_y(s, 1), d, width); + draw_hwc_line(d, hwc_src, width, hwc_palette, c_x, y - c_y); } if (y_start < 0) diff --git a/hw/display/sm501_template.h b/hw/display/sm501_template.h index f33e499be429d91ee412e3abc711..82e2b779f92cf987afb80e2b19a9 100644 --- a/hw/display/sm501_template.h +++ b/hw/display/sm501_template.h @@ -99,29 +99,24 @@ static void glue(draw_line32_, PIXEL_NAME)( /** * Draw hardware cursor image on the given line. */ -static void glue(draw_hwc_line_, PIXEL_NAME)(SM501State * s, int crt, - uint8_t * palette, int c_y, uint8_t *d, int width) +static void glue(draw_hwc_line_, PIXEL_NAME)(uint8_t *d, const uint8_t *s, + int width, const uint8_t *palette, int c_x, int c_y) { - int x, i; + int i; uint8_t bitset = 0; - /* get hardware cursor pattern */ - uint32_t cursor_addr = get_hwc_address(s, crt); - assert(0 <= c_y && c_y < SM501_HWC_HEIGHT); - cursor_addr += 64 * c_y / 4; /* 4 pixels per byte */ - cursor_addr += s->base; - /* get cursor position */ - x = get_hwc_x(s, crt); - d += x * BPP; + assert(0 <= c_y && c_y < SM501_HWC_HEIGHT); + s += SM501_HWC_WIDTH * c_y / 4; /* 4 pixels per byte */ + d += c_x * BPP; - for (i = 0; i < SM501_HWC_WIDTH && x + i < width; i++) { + for (i = 0; i < SM501_HWC_WIDTH && c_x + i < width; i++) { uint8_t v; /* get pixel value */ if (i % 4 == 0) { - bitset = ldub_phys(&address_space_memory, cursor_addr); - cursor_addr++; + bitset = ldub_p(s); + s++; } v = bitset & 3; bitset >>= 2;
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