17 lines
753 B
Diff
17 lines
753 B
Diff
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Index: xen-4.18.0-testing/xen/arch/x86/hvm/stdvga.c
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===================================================================
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--- xen-4.18.0-testing.orig/xen/arch/x86/hvm/stdvga.c
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+++ xen-4.18.0-testing/xen/arch/x86/hvm/stdvga.c
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@@ -165,7 +165,10 @@ static int stdvga_outb(uint64_t addr, ui
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/* When in standard vga mode, emulate here all writes to the vram buffer
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* so we can immediately satisfy reads without waiting for qemu. */
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- s->stdvga = (s->sr[7] == 0x00);
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+ s->stdvga =
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+ (s->sr[7] == 0x00) && /* standard vga mode */
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+ (s->gr[6] == 0x05); /* misc graphics register w/ MemoryMapSelect=1
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+ * 0xa0000-0xaffff (64k region), AlphaDis=1 */
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if ( !prev_stdvga && s->stdvga )
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{
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