qemu/include
Roman Bolshakov 5009ef22c6 i386: hvf: Don't duplicate register reset
hvf_reset_vcpu() duplicates actions performed by x86_cpu_reset(). The
difference is that hvf_reset_vcpu() stores initial values directly to
VMCS while x86_cpu_reset() stores it in CPUX86State and then
cpu_synchronize_all_post_init() or cpu_synchronize_all_post_reset()
flushes CPUX86State into VMCS. That makes hvf_reset_vcpu() a kind of
no-op.

Here's the trace of CPU state modifications during VM start:
  hvf_reset_vcpu (resets VMCS)
  cpu_synchronize_all_post_init (overwrites VMCS fields written by
                                 hvf_reset_vcpu())
  cpu_synchronize_all_states
  hvf_reset_vcpu (resets VMCS)
  cpu_synchronize_all_post_reset (overwrites VMCS fields written by
                                  hvf_reset_vcpu())

General purpose registers, system registers, segment descriptors, flags
and IP are set by hvf_put_segments() in post-init and post-reset,
therefore it's safe to remove them from hvf_reset_vcpu().

PDPTE initialization can be dropped because Intel SDM (26.3.1.6 Checks
on Guest Page-Directory-Pointer-Table Entries) doesn't require PDPTE to
be clear unless PAE is used: "A VM entry to a guest that does not use
PAE paging does not check the validity of any PDPTEs."
And if PAE is used, PDPTE's are initialized from CR3 in macvm_set_cr0().

Cc: Cameron Esfahani <dirty@apple.com>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Message-Id: <20200630102824.77604-8-r.bolshakov@yadro.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-07-10 18:02:19 -04:00
..
authz Include generated QAPI headers less 2019-08-16 13:31:51 +02:00
block nbd: Use ERRP_GUARD() 2020-07-10 15:18:09 +02:00
chardev chardev: Use QEMUChrEvent enum in IOEventHandler typedef 2020-01-08 11:15:35 +01:00
crypto firmware (and crypto) patches 2020-07-09 20:01:43 +01:00
disas disas: include an optional note for the start of disassembly 2020-05-15 15:25:16 +01:00
exec virtio,acpi: features, fixes, cleanups. 2020-07-07 17:37:44 +01:00
fpu softfloat,m68k: disable floatx80_invalid_encoding() for m68k 2020-07-06 21:41:52 +02:00
hw qdev: Make functions taking Error ** return bool, not void 2020-07-10 15:18:08 +02:00
io io/task: Move 'qom/object.h' header to source 2020-06-10 12:09:37 -04:00
libdecnumber include: Make headers more self-contained 2019-08-16 13:31:51 +02:00
migration migration/colo: Use ram_block_discard_disable() 2020-07-02 05:54:59 -04:00
monitor hmp: Implement qom-get HMP command 2020-06-01 18:44:27 +01:00
net vhost-vdpa: introduce vhost-vdpa net client 2020-07-07 07:59:51 -04:00
qapi scripts: Coccinelle script to use ERRP_GUARD() 2020-07-10 15:18:09 +02:00
qemu coverity: provide Coverity-friendly MIN_CONST and MAX_CONST 2020-07-10 18:02:18 -04:00
qom qom: Introduce object_property_try_add_child() 2020-07-10 18:02:16 -04:00
scsi scsi: explicitly list guest-recoverable sense codes 2019-07-15 11:20:42 +02:00
standard-headers Linux headers: update 2020-06-18 12:13:36 +02:00
sysemu i386: hvf: Don't duplicate register reset 2020-07-10 18:02:19 -04:00
tcg tcg: call qemu_spin_destroy for tb->jmp_lock 2020-06-16 14:49:05 +01:00
ui ui/win32-kbd-hook: handle AltGr in a hook procedure 2020-05-19 09:06:44 +02:00
user linux-user: Include trace-root.h in syscall-trace.h 2020-01-15 15:13:09 -10:00
elf.h target/arm/arch_dump: Add SVE notes 2020-01-23 15:34:04 +00:00
glib-compat.h glib: bump min required glib library version to 2.48 2019-08-22 10:46:34 +01:00
qemu-common.h Update copyright date for user-facing copyright strings 2020-03-22 11:16:21 +00:00
qemu-io.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
trace-tcg.h trace: get rid of generated-events.h/generated-events.c 2016-10-12 09:54:52 +02:00