From: Christoph Egger <Christoph.Egger@amd.com>
To: xen-devel@lists.xensource.com
Subject: [PATCH 06/14] Nested Virtualization: CRn & paged real mode
Date: Thu, 5 Aug 2010 17:02:16 +0200 [thread overview]
Message-ID: <201008051702.16950.Christoph.Egger@amd.com> (raw)
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Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
--
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Advanced Micro Devices GmbH
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Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632
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# HG changeset patch
# User cegger
# Date 1280925502 -7200
Allow paged real mode during vmrun emulation.
Emulate cr0 and cr4 when guest does not intercept them.
diff -r 917f9eb07fc3 -r b1a356e5658d xen/arch/x86/hvm/hvm.c
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -54,6 +54,7 @@
#include <asm/hvm/support.h>
#include <asm/hvm/cacheattr.h>
#include <asm/hvm/trace.h>
+#include <asm/hvm/nestedhvm.h>
#include <asm/mtrr.h>
#include <asm/apic.h>
#include <public/sched.h>
@@ -1105,7 +1106,8 @@ int hvm_set_cr0(unsigned long value)
/* ET is reserved and should be always be 1. */
value |= X86_CR0_ET;
- if ( (value & (X86_CR0_PE | X86_CR0_PG)) == X86_CR0_PG )
+ if ( !nestedhvm_vmentry_emulate(v) &&
+ (value & (X86_CR0_PE | X86_CR0_PG)) == X86_CR0_PG )
goto gpf;
if ( (value & X86_CR0_PG) && !(old_value & X86_CR0_PG) )
@@ -1159,7 +1161,7 @@ int hvm_set_cr0(unsigned long value)
}
}
- if ( has_arch_mmios(v->domain) )
+ if ( !nestedhvm_vmentry_emulate(v) && has_arch_mmios(v->domain) )
{
if ( (value & X86_CR0_CD) && !(value & X86_CR0_NW) )
{
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next reply other threads:[~2010-08-05 15:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-05 15:02 Christoph Egger [this message]
2010-08-09 12:40 ` [PATCH 06/14] Nested Virtualization: CRn & paged real mode Tim Deegan
2010-08-11 9:12 ` Christoph Egger
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