# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1202410632 0
# Node ID 8e4cd0658c4152a02576892e895e63772bd9df1c
# Parent 5e08872c24f791921be8bbea3419a8e85da22148
vmx realmode: Add REP MOVS handler.
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
xen/arch/x86/hvm/vmx/realmode.c | 53 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 53 insertions(+)
diff -r 5e08872c24f7 -r 8e4cd0658c41 xen/arch/x86/hvm/vmx/realmode.c
--- a/xen/arch/x86/hvm/vmx/realmode.c Thu Feb 07 18:56:47 2008 +0000
+++ b/xen/arch/x86/hvm/vmx/realmode.c Thu Feb 07 18:57:12 2008 +0000
@@ -13,6 +13,7 @@
#include <xen/init.h>
#include <xen/lib.h>
#include <xen/sched.h>
+#include <xen/paging.h>
#include <asm/event.h>
#include <asm/hvm/hvm.h>
#include <asm/hvm/support.h>
@@ -313,6 +314,57 @@ realmode_rep_outs(
return X86EMUL_OKAY;
}
+static int
+realmode_rep_movs(
+ enum x86_segment src_seg,
+ unsigned long src_offset,
+ enum x86_segment dst_seg,
+ unsigned long dst_offset,
+ unsigned int bytes_per_rep,
+ unsigned long *reps,
+ struct x86_emulate_ctxt *ctxt)
+{
+ struct realmode_emulate_ctxt *rm_ctxt =
+ container_of(ctxt, struct realmode_emulate_ctxt, ctxt);
+ struct vcpu *curr = current;
+ uint32_t saddr = virtual_to_linear(src_seg, src_offset, rm_ctxt);
+ uint32_t daddr = virtual_to_linear(dst_seg, dst_offset, rm_ctxt);
+ p2m_type_t p2mt;
+
+ if ( (curr->arch.hvm_vcpu.guest_cr[0] & X86_CR0_PE) ||
+ curr->arch.hvm_vmx.real_mode_io_in_progress )
+ return X86EMUL_UNHANDLEABLE;
+
+ mfn_x(gfn_to_mfn_current(saddr >> PAGE_SHIFT, &p2mt));
+ if ( !p2m_is_ram(p2mt) )
+ {
+ if ( !curr->arch.hvm_vmx.real_mode_io_completed )
+ {
+ curr->arch.hvm_vmx.real_mode_io_in_progress = 1;
+ send_mmio_req(IOREQ_TYPE_COPY, saddr, *reps, bytes_per_rep,
+ daddr, IOREQ_READ,
+ !!(ctxt->regs->eflags & X86_EFLAGS_DF), 1);
+ }
+
+ if ( !curr->arch.hvm_vmx.real_mode_io_completed )
+ return X86EMUL_RETRY;
+
+ curr->arch.hvm_vmx.real_mode_io_completed = 0;
+ }
+ else
+ {
+ mfn_x(gfn_to_mfn_current(daddr >> PAGE_SHIFT, &p2mt));
+ if ( p2m_is_ram(p2mt) )
+ return X86EMUL_UNHANDLEABLE;
+ curr->arch.hvm_vmx.real_mode_io_in_progress = 1;
+ send_mmio_req(IOREQ_TYPE_COPY, daddr, *reps, bytes_per_rep,
+ saddr, IOREQ_WRITE,
+ !!(ctxt->regs->eflags & X86_EFLAGS_DF), 1);
+ }
+
+ return X86EMUL_OKAY;
+}
+
static int
realmode_read_segment(
enum x86_segment seg,
@@ -600,6 +652,7 @@ static struct x86_emulate_ops realmode_e
.cmpxchg = realmode_emulate_cmpxchg,
.rep_ins = realmode_rep_ins,
.rep_outs = realmode_rep_outs,
+ .rep_movs = realmode_rep_movs,
.read_segment = realmode_read_segment,
.write_segment = realmode_write_segment,
.read_io = realmode_read_io,
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