/* * fbif.h -- Xen virtual frame buffer device * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to * deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Copyright (C) 2005 Anthony Liguori * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster */ #ifndef __XEN_PUBLIC_IO_FBIF_H__ #define __XEN_PUBLIC_IO_FBIF_H__ /* Out events (frontend -> backend) */ /* * Out events may be sent only when requested by backend, and receipt * of an unknown out event is an error. */ /* Event type 1 currently not used */ /* * Framebuffer update notification event * Capable frontend sets feature-update in xenstore. * Backend requests it by setting request-update in xenstore. */ #define XENFB_TYPE_UPDATE 2 struct xenfb_update { uint8_t type; /* XENFB_TYPE_UPDATE */ int32_t x; /* source x */ int32_t y; /* source y */ int32_t width; /* rect width */ int32_t height; /* rect height */ }; /* * Framebuffer resize notification event * Capable backend sets feature-resize in xenstore. */ #define XENFB_TYPE_RESIZE 3 struct xenfb_resize { uint8_t type; /* XENFB_TYPE_RESIZE */ int32_t width; /* width in pixels */ int32_t height; /* height in pixels */ int32_t stride; /* stride in bytes */ int32_t depth; /* depth in bits */ int32_t offset; /* start offset within framebuffer */ }; #define XENFB_OUT_EVENT_SIZE 40 union xenfb_out_event { uint8_t type; struct xenfb_update update; struct xenfb_resize resize; char pad[XENFB_OUT_EVENT_SIZE]; }; /* In events (backend -> frontend) */ /* * Frontends should ignore unknown in events. * No in events currently defined. */ #define XENFB_IN_EVENT_SIZE 40 union xenfb_in_event { uint8_t type; char pad[XENFB_IN_EVENT_SIZE]; }; /* shared page */ #define XENFB_IN_RING_SIZE 1024 #define XENFB_IN_RING_LEN (XENFB_IN_RING_SIZE / XENFB_IN_EVENT_SIZE) #define XENFB_IN_RING_OFFS 1024 #define XENFB_IN_RING(page) \ ((union xenfb_in_event *)((char *)(page) + XENFB_IN_RING_OFFS)) #define XENFB_IN_RING_REF(page, idx) \ (XENFB_IN_RING((page))[(idx) % XENFB_IN_RING_LEN]) #define XENFB_OUT_RING_SIZE 2048 #define XENFB_OUT_RING_LEN (XENFB_OUT_RING_SIZE / XENFB_OUT_EVENT_SIZE) #define XENFB_OUT_RING_OFFS (XENFB_IN_RING_OFFS + XENFB_IN_RING_SIZE) #define XENFB_OUT_RING(page) \ ((union xenfb_out_event *)((char *)(page) + XENFB_OUT_RING_OFFS)) #define XENFB_OUT_RING_REF(page, idx) \ (XENFB_OUT_RING((page))[(idx) % XENFB_OUT_RING_LEN]) struct xenfb_page { uint32_t in_cons, in_prod; uint32_t out_cons, out_prod; int32_t width; /* width of the framebuffer (in pixels) */ int32_t height; /* height of the framebuffer (in pixels) */ uint32_t line_length; /* length of a row of pixels (in bytes) */ uint32_t mem_length; /* length of the framebuffer (in bytes) */ uint8_t depth; /* depth of a pixel (in bits) */ /* * Framebuffer page directory * * Each directory page holds PAGE_SIZE / sizeof(*pd) * framebuffer pages, and can thus map up to PAGE_SIZE * * PAGE_SIZE / sizeof(*pd) bytes. With PAGE_SIZE == 4096 and * sizeof(unsigned long) == 4/8, that's 4 Megs 32 bit and 2 * Megs 64 bit. 256 directories give enough room for a 512 * Meg framebuffer with a max resolution of 12,800x10,240. * Should be enough for a while with room leftover for * expansion. */ unsigned long pd[256]; }; /* * Wart: xenkbd needs to know default resolution. Put it here until a * better solution is found, but don't leak it to the backend. */ #ifdef __KERNEL__ #define XENFB_WIDTH 800 #define XENFB_HEIGHT 600 #define XENFB_DEPTH 32 #endif #endif 37cdfe03a982ef4543c6b'>6ee04f275c4236a9324793df05ba07806cd0584e parent36fd4f0249f8cb445835acb7c6937a0ffa2b5f14 (diff)
x86/fpu: Stop saving and restoring CR0.TS in fpu__init_check_bugs()
fpu__init_check_bugs() runs long after the early FPU init, so CR0.TS will be clear by the time it runs. The save-and-restore dance would have been unnecessary anyway, though, as kernel_fpu_begin() would have been good enough. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com> Cc: Rik van Riel <riel@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: kvm list <kvm@vger.kernel.org> Link: http://lkml.kernel.org/r/76d1f1eacb5caead98197d1eb50ac6110ab20c6a.1477951965.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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