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/macmodes.h | 71 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 drivers/video/fbdev/macmodes.h (limited to 'drivers/video/fbdev/macmodes.h') diff --git a/drivers/video/fbdev/macmodes.h b/drivers/video/fbdev/macmodes.h new file mode 100644 index 000000000..b86ba08aa --- /dev/null +++ b/drivers/video/fbdev/macmodes.h @@ -0,0 +1,71 @@ +/* + * linux/drivers/video/macmodes.h -- Standard MacOS video modes + * + * Copyright (C) 1998 Geert Uytterhoeven + * + * 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. + */ + +#ifndef _VIDEO_MACMODES_H +#define _VIDEO_MACMODES_H + + /* + * Video mode values. + * These are supposed to be the same as the values that Apple uses in + * MacOS. + */ + +#define VMODE_NVRAM 0 +#define VMODE_512_384_60I 1 /* 512x384, 60Hz interlaced (NTSC) */ +#define VMODE_512_384_60 2 /* 512x384, 60Hz */ +#define VMODE_640_480_50I 3 /* 640x480, 50Hz interlaced (PAL) */ +#define VMODE_640_480_60I 4 /* 640x480, 60Hz interlaced (NTSC) */ +#define VMODE_640_480_60 5 /* 640x480, 60Hz (VGA) */ +#define VMODE_640_480_67 6 /* 640x480, 67Hz */ +#define VMODE_640_870_75P 7 /* 640x870, 75Hz (portrait) */ +#define VMODE_768_576_50I 8 /* 768x576, 50Hz (PAL full frame) */ +#define VMODE_800_600_56 9 /* 800x600, 56Hz */ +#define VMODE_800_600_60 10 /* 800x600, 60Hz */ +#define VMODE_800_600_72 11 /* 800x600, 72Hz */ +#define VMODE_800_600_75 12 /* 800x600, 75Hz */ +#define VMODE_832_624_75 13 /* 832x624, 75Hz */ +#define VMODE_1024_768_60 14 /* 1024x768, 60Hz */ +#define VMODE_1024_768_70 15 /* 1024x768, 70Hz (or 72Hz?) */ +#define VMODE_1024_768_75V 16 /* 1024x768, 75Hz (VESA) */ +#define VMODE_1024_768_75 17 /* 1024x768, 75Hz */ +#define VMODE_1152_870_75 18 /* 1152x870, 75Hz */ +#define VMODE_1280_960_75 19 /* 1280x960, 75Hz */ +#define VMODE_1280_1024_75 20 /* 1280x1024, 75Hz */ +#define VMODE_1152_768_60 21 /* 1152x768, 60Hz Titanium PowerBook */ +#define VMODE_1600_1024_60 22 /* 1600x1024, 60Hz 22" Cinema Display */ +#define VMODE_MAX 22 +#define VMODE_CHOOSE 99 + +#define CMODE_NVRAM -1 +#define CMODE_CHOOSE -2 +#define CMODE_8 0 /* 8 bits/pixel */ +#define CMODE_16 1 /* 16 (actually 15) bits/pixel */ +#define CMODE_32 2 /* 32 (actually 24) bits/pixel */ + + +extern int mac_vmode_to_var(int vmode, int cmode, + struct fb_var_screeninfo *var); +extern int mac_var_to_vmode(const struct fb_var_screeninfo *var, int *vmode, + int *cmode); +extern int mac_map_monitor_sense(int sense); +extern int mac_find_mode(struct fb_var_screeninfo *var, + struct fb_info *info, + const char *mode_option, + unsigned int default_bpp); + + + /* + * Addresses in NVRAM where video mode and pixel size are stored. + */ + +#define NV_VMODE 0x140f +#define NV_CMODE 0x1410 + +#endif /* _VIDEO_MACMODES_H */ -- cgit v1.3.1