From 73c33765f3d879001818cd0719038c78a0c65561 Mon Sep 17 00:00:00 2001
From: Sheng Yang <[EMAIL PROTECTED]>
Date: Fri, 18 Apr 2008 17:15:39 +0800
Subject: [PATCH] kvm: qemu: Enable EPT support for real mode
This patch build a identity page table on the last page of VGA bios, and use
it as the guest page table in nonpaging mode for EPT.
Signed-off-by: Sheng Yang <[EMAIL PROTECTED]>
---
qemu/hw/pc.c | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/qemu/hw/pc.c b/qemu/hw/pc.c
index ae87ab9..dcb98c6 100644
--- a/qemu/hw/pc.c
+++ b/qemu/hw/pc.c
@@ -780,6 +780,9 @@ static void pc_init1(ram_addr_t ram_size, int
vga_ram_size,
int index;
BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
BlockDriverState *fd[MAX_FD];
+#ifdef USE_KVM
+ uint32_t *table_items;
+#endif
if (ram_size >= 0xe0000000 ) {
above_4g_mem_size = ram_size - 0xe0000000;
@@ -857,6 +860,17 @@ static void pc_init1(ram_addr_t ram_size, int
vga_ram_size,
exit(1);
}
+#ifdef USE_KVM
+ if (kvm_allowed) {
+ /* set up identity map for EPT at the last page of VGA BIOS region.
+ * 0xe7 = _PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED |
+ * _PAGE_DIRTY | _PAGE_PSE */
+ table_items = (void *)(phys_ram_base + vga_bios_offset + 0xf000);
+ for (i = 0; i < 1024; i++)
+ table_items[i] = (i << 22) + 0xe7;
+ }
+#endif
+
/* above 4giga memory allocation */
if (above_4g_mem_size > 0) {
ram_addr = qemu_ram_alloc(above_4g_mem_size);
--
1.5.4.5
From 73c33765f3d879001818cd0719038c78a0c65561 Mon Sep 17 00:00:00 2001
From: Sheng Yang <[EMAIL PROTECTED]>
Date: Fri, 18 Apr 2008 17:15:39 +0800
Subject: [PATCH] kvm: qemu: Enable EPT support for real mode
This patch build a identity page table on the last page of VGA bios, and use it
as the guest page table in nonpaging mode for EPT.
Signed-off-by: Sheng Yang <[EMAIL PROTECTED]>
---
qemu/hw/pc.c | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/qemu/hw/pc.c b/qemu/hw/pc.c
index ae87ab9..dcb98c6 100644
--- a/qemu/hw/pc.c
+++ b/qemu/hw/pc.c
@@ -780,6 +780,9 @@ static void pc_init1(ram_addr_t ram_size, int vga_ram_size,
int index;
BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
BlockDriverState *fd[MAX_FD];
+#ifdef USE_KVM
+ uint32_t *table_items;
+#endif
if (ram_size >= 0xe0000000 ) {
above_4g_mem_size = ram_size - 0xe0000000;
@@ -857,6 +860,17 @@ static void pc_init1(ram_addr_t ram_size, int vga_ram_size,
exit(1);
}
+#ifdef USE_KVM
+ if (kvm_allowed) {
+ /* set up identity map for EPT at the last page of VGA BIOS region.
+ * 0xe7 = _PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED |
+ * _PAGE_DIRTY | _PAGE_PSE */
+ table_items = (void *)(phys_ram_base + vga_bios_offset + 0xf000);
+ for (i = 0; i < 1024; i++)
+ table_items[i] = (i << 22) + 0xe7;
+ }
+#endif
+
/* above 4giga memory allocation */
if (above_4g_mem_size > 0) {
ram_addr = qemu_ram_alloc(above_4g_mem_size);
--
1.5.4.5
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