From 93de2a6a4b91b72607136dd656edf03fb399d27f Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Wed, 23 Sep 2026 09:37:21 -0700 Subject: KVM: SEV: Do cache maintenance on the source VM during intra-host migration Manually perform cache maintenance on the source VM during intra-host migration to ensure no stale data is left in CPU caches after the VM is destroyed. Because the source VM is "converted" to a non-SEV VM, KVM's memory reclaim flows won't trigger cache maintenance, e.g. when all guest memory is reclaimed in response to detaching from the mmu_notifier. Note, relying on the destination VM to do cache maintenance isn't an option as KVM doesn't require identical guest memory configurations, i.e. the source VM may have access to memory that the destination VM does not. Enforcing equivalent memory configurations is infeasible, as it would require a *deep* comparison of memslots, e.g. to verify that not only are the memslot identical, but what the memslots point at is also identical. Fixes: b56639318bb2 ("KVM: SEV: Add support for SEV intra host migration") Cc: stable@vger.kernel.org Reported-by: Stefan Teodorescu Signed-off-by: Sean Christopherson Message-ID: <20260923163721.1584779-3-seanjc@google.com> Signed-off-by: Paolo Bonzini --- drivers/video/fbdev/pxafb.h | 204 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 204 insertions(+) create mode 100644 drivers/video/fbdev/pxafb.h (limited to 'drivers/video/fbdev/pxafb.h') diff --git a/drivers/video/fbdev/pxafb.h b/drivers/video/fbdev/pxafb.h new file mode 100644 index 000000000..86b1e9ab1 --- /dev/null +++ b/drivers/video/fbdev/pxafb.h @@ -0,0 +1,204 @@ +#ifndef __PXAFB_H__ +#define __PXAFB_H__ + +/* + * linux/drivers/video/pxafb.h + * -- Intel PXA250/210 LCD Controller Frame Buffer Device + * + * Copyright (C) 1999 Eric A. Thomas. + * Copyright (C) 2004 Jean-Frederic Clere. + * Copyright (C) 2004 Ian Campbell. + * Copyright (C) 2004 Jeff Lackey. + * Based on sa1100fb.c Copyright (C) 1999 Eric A. Thomas + * which in turn is + * Based on acornfb.c Copyright (C) Russell King. + * + * 2001-08-03: Cliff Brake + * - ported SA1100 code to PXA + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +/* PXA LCD DMA descriptor */ +struct pxafb_dma_descriptor { + unsigned int fdadr; + unsigned int fsadr; + unsigned int fidr; + unsigned int ldcmd; +}; + +enum { + PAL_NONE = -1, + PAL_BASE = 0, + PAL_OV1 = 1, + PAL_OV2 = 2, + PAL_MAX, +}; + +enum { + DMA_BASE = 0, + DMA_UPPER = 0, + DMA_LOWER = 1, + DMA_OV1 = 1, + DMA_OV2_Y = 2, + DMA_OV2_Cb = 3, + DMA_OV2_Cr = 4, + DMA_CURSOR = 5, + DMA_CMD = 6, + DMA_MAX, +}; + +/* maximum palette size - 256 entries, each 4 bytes long */ +#define PALETTE_SIZE (256 * 4) +#define CMD_BUFF_SIZE (1024 * 50) + +/* NOTE: the palette and frame dma descriptors are doubled to allow + * the 2nd set for branch settings (FBRx) + */ +struct pxafb_dma_buff { + unsigned char palette[PAL_MAX * PALETTE_SIZE]; + uint16_t cmd_buff[CMD_BUFF_SIZE]; + struct pxafb_dma_descriptor pal_desc[PAL_MAX * 2]; + struct pxafb_dma_descriptor dma_desc[DMA_MAX * 2]; +}; + +enum { + OVERLAY1, + OVERLAY2, +}; + +enum { + OVERLAY_FORMAT_RGB = 0, + OVERLAY_FORMAT_YUV444_PACKED, + OVERLAY_FORMAT_YUV444_PLANAR, + OVERLAY_FORMAT_YUV422_PLANAR, + OVERLAY_FORMAT_YUV420_PLANAR, +}; + +#define NONSTD_TO_XPOS(x) (((x) >> 0) & 0x3ff) +#define NONSTD_TO_YPOS(x) (((x) >> 10) & 0x3ff) +#define NONSTD_TO_PFOR(x) (((x) >> 20) & 0x7) + +struct pxafb_layer; + +struct pxafb_layer_ops { + void (*enable)(struct pxafb_layer *); + void (*disable)(struct pxafb_layer *); + void (*setup)(struct pxafb_layer *); +}; + +struct pxafb_layer { + struct fb_info fb; + int id; + int registered; + uint32_t usage; + uint32_t control[2]; + + struct pxafb_layer_ops *ops; + + void __iomem *video_mem; + unsigned long video_mem_phys; + size_t video_mem_size; + struct completion branch_done; + + struct pxafb_info *fbi; +}; + +struct pxafb_info { + struct fb_info fb; + struct device *dev; + struct clk *clk; + + void __iomem *mmio_base; + + struct pxafb_dma_buff *dma_buff; + size_t dma_buff_size; + dma_addr_t dma_buff_phys; + dma_addr_t fdadr[DMA_MAX * 2]; + + void __iomem *video_mem; /* virtual address of frame buffer */ + unsigned long video_mem_phys; /* physical address of frame buffer */ + size_t video_mem_size; /* size of the frame buffer */ + u16 * palette_cpu; /* virtual address of palette memory */ + u_int palette_size; + + u_int lccr0; + u_int lccr3; + u_int lccr4; + u_int cmap_inverse:1, + cmap_static:1, + unused:30; + + u_int reg_lccr0; + u_int reg_lccr1; + u_int reg_lccr2; + u_int reg_lccr3; + u_int reg_lccr4; + u_int reg_cmdcr; + + unsigned long hsync_time; + + volatile u_char state; + volatile u_char task_state; + struct mutex ctrlr_lock; + wait_queue_head_t ctrlr_wait; + struct work_struct task; + + struct completion disable_done; + +#ifdef CONFIG_FB_PXA_SMARTPANEL + uint16_t *smart_cmds; + size_t n_smart_cmds; + struct completion command_done; + struct completion refresh_done; + struct task_struct *smart_thread; +#endif + +#ifdef CONFIG_FB_PXA_OVERLAY + struct pxafb_layer overlay[2]; +#endif + +#ifdef CONFIG_CPU_FREQ + struct notifier_block freq_transition; +#endif + + struct regulator *lcd_supply; + bool lcd_supply_enabled; + + void (*lcd_power)(int, struct fb_var_screeninfo *); + void (*backlight_power)(int); + + struct pxafb_mach_info *inf; +}; + +#define TO_INF(ptr,member) container_of(ptr,struct pxafb_info,member) + +/* + * These are the actions for set_ctrlr_state + */ +#define C_DISABLE (0) +#define C_ENABLE (1) +#define C_DISABLE_CLKCHANGE (2) +#define C_ENABLE_CLKCHANGE (3) +#define C_REENABLE (4) +#define C_DISABLE_PM (5) +#define C_ENABLE_PM (6) +#define C_STARTUP (7) + +#define PXA_NAME "PXA" + +/* + * Minimum X and Y resolutions + */ +#define MIN_XRES 64 +#define MIN_YRES 64 + +/* maximum X and Y resolutions - note these are limits from the register + * bits length instead of the real ones + */ +#define MAX_XRES 1024 +#define MAX_YRES 1024 + +#endif /* __PXAFB_H__ */ -- cgit v1.3.1