This patch adds all necessary intercept checks for
instructions that access the crX registers.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

This patch adds a callback into kvm_x86_ops so that svm and
vmx code can do intercept checks on emulated instructions.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

This patch adds a flag for the opcoded to tag instruction
which are only recognized in protected mode. The necessary
check is added too.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

This patch adds a check_perm callback for each opcode into
the instruction emulator. This will be used to do all
necessary permission checks on instructions before checking
whether they are intercepted or not.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

This patch prevents the changed CPU state to be written back
when the emulator detected that the instruction was
intercepted by the guest.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

Add intercept codes for instructions defined by SVM as
interceptable.
Signed-off-by: NAvi Kivity <avi@redhat.com>
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

When running in guest mode, certain instructions can be intercepted by
hardware.  This also holds for nested guests running on emulated
virtualization hardware, in particular instructions emulated by kvm
itself.

This patch adds a framework for intercepting instructions.  If an
instruction is marked for interception, and if we're running in guest
mode, a callback is called to check whether an intercept is needed or
not.  The callback is called at three points in time: immediately after
beginning execution, after checking privilge exceptions, and after
checking memory exception.  This suits the different interception points
defined for different instructions and for the various virtualization
instruction sets.

In addition, a new X86EMUL_INTERCEPT is defined, which any callback or
memory access may define, allowing the more complicated intercepts to be
implemented in existing callbacks.
Signed-off-by: NAvi Kivity <avi@redhat.com>
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

Signed-off-by: NAvi Kivity <avi@redhat.com>

Add support for marking an instruction as SSE, switching registers used
to the SSE register file.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Most SIMD instructions use the 66/f2/f3 prefixes to distinguish between
different variants of the same instruction.  Usually the encoding is quite
regular, but in some cases (including non-SIMD instructions) the prefixes
generate very different instructions.  Examples include XCHG/PAUSE,
MOVQ/MOVDQA/MOVDQU, and MOVBE/CRC32.

Allow the emulator to handle these special cases by splitting such opcodes
into groups, with different decode flags and execution functions for different
prefixes.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Needed for emulating fpu instructions.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Currently we store a rep prefix as 1 or 2 depending on whether it is a REPE or
REPNE.  Since sse instructions depend on the prefix value, store it as the
original opcode to simplify things further on.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Since sse instructions can issue 16-byte mmios, we need to support them.  We
can't increase the kvm_run mmio buffer size to 16 bytes without breaking
compatibility, so instead we break the large mmios into two smaller 8-byte
ones.  Since the bus is 64-bit we aren't breaking any atomicity guarantees.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Make room for sse mmio completions.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Needed for coalesced mmio using sse.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Fix race between nmi injection and enabling nmi window in a simpler way.
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

This reverts commit f8636849.

Simpler fix to follow.
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

As Avi recently mentioned, the new standard mechanism for exposing features
is KVM_GET_SUPPORTED_CPUID, not spamming CAPs. For some reason async pf
missed that.

So expose async_pf here.
Signed-off-by: NGlauber Costa <glommer@redhat.com>
CC: Gleb Natapov <gleb@redhat.com>
CC: Avi Kivity <avi@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

Use vmx_set_nmi_mask() instead of open-coding management of
the hardware bit and the software hint (nmi_known_unmasked).

There's a slight change of behaviour when running without
hardware virtual NMI support - we now clear the NMI mask if
NMI delivery faulted in that case as well.  This improves
emulation accuracy.
Signed-off-by: NAvi Kivity <avi@redhat.com>

We use boot_cpu_has now.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

vmx_complete_atomic_exit() cached it for us, so we can use it here.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Only read it if we're going to use it later.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Move the exit reason checks to the front of the function, for early
exit in the common case.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Check for the exit reason first; this allows us, later,
to avoid a VMREAD for VM_EXIT_INTR_INFO_FIELD.
Signed-off-by: NAvi Kivity <avi@redhat.com>

When we haven't injected an interrupt, we don't need to recover
the nmi blocking state (since the guest can't set it by itself).
This allows us to avoid a VMREAD later on.
Signed-off-by: NAvi Kivity <avi@redhat.com>

We may read the cpl quite often in the same vmexit (instruction privilege
check, memory access checks for instruction and operands), so we gain
a bit if we cache the value.
Signed-off-by: NAvi Kivity <avi@redhat.com>

In long mode, vm86 mode is disallowed, so we need not check for
it.  Reading rflags.vm may require a VMREAD, so it is expensive.
Signed-off-by: NAvi Kivity <avi@redhat.com>

If called several times within the same exit, return cached results.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Some rflags bits are owned by the host, not guest, so we need to use
kvm_get_rflags() to strip those bits away or kvm_set_rflags() to add them
back.
Signed-off-by: NAvi Kivity <avi@redhat.com>

This fixes:
alchemy/xxs1500/init.c: In function 'prom_init':
alchemy/xxs1500/init.c:57:17: error: ignoring return value of 'kstrtoul', declared with attribute warn_unused_result
Signed-off-by: NManuel Lauss <manuel.lauss@googlemail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/2340/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Without this, stale Icache or TLB entries may be used.
Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
https://patchwork.linux-mips.org/patch/2318/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

PAGE_SIZE >= 64kb (1 << 16) is too big to be the immediate of the
addiu/daddiu instruction, so, use addu/daddu instruction instead.

The following compiling error is fixed:

AS      arch/mips/power/hibernate.o
arch/mips/power/hibernate.S: Assembler messages:
arch/mips/power/hibernate.S:38: Error: expression out of range
make[2]: *** [arch/mips/power/hibernate.o] Error 1
make[1]: *** [arch/mips/power] Error 2
Reported-by: NRoman Mamedov <rm@romanrm.ru>
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2313/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The code for supporting one-shot mode for the clockevent is already there,
only the feature flag was not set.  Setting the one-shot flag allows the
kernel to run in tickless mode.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2261/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

  MODPOST 356 modules
ERROR: "jz4740_timer_disable_watchdog" [drivers/watchdog/jz4740_wdt.ko] undefine
d!
ERROR: "jz4740_timer_enable_watchdog" [drivers/watchdog/jz4740_wdt.ko] undefined
!
make[1]: *** [__modpost] Error 1
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

  CC      arch/mips/jz4740/dma.o
arch/mips/jz4740/dma.c: In function 'jz4740_dma_chan_irq':
arch/mips/jz4740/dma.c:245:11: error: variable 'status' set but not used [-Werro
r=unused-but-set-variable]
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

  HOSTCC  arch/mips/boot/compressed/calc_vmlinuz_load_addr
arch/mips/boot/compressed/calc_vmlinuz_load_addr.c: In function 'main':
arch/mips/boot/compressed/calc_vmlinuz_load_addr.c:35:2: warning: format '%llx' expects type 'long long unsigned int *', but argument 3 has type 'uint64_t *'
arch/mips/boot/compressed/calc_vmlinuz_load_addr.c:54:2: warning: format '%llx' expects type 'long long unsigned int', but argument 2 has type 'uint64_t'
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

  CC      arch/mips/alchemy/devboards/db1x00/board_setup.o
arch/mips/alchemy/devboards/db1x00/board_setup.c: In function 'board_setup':
arch/mips/alchemy/devboards/db1x00/board_setup.c:130:6: error: variable 'pin_func' set but not used [-Werror=unused-but-set-variable]
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

  CC      arch/mips/sgi-ip27/ip27-hubio.o
arch/mips/sgi-ip27/ip27-hubio.c: In function 'hub_pio_map':
arch/mips/sgi-ip27/ip27-hubio.c:32:20: error: variable 'junk' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>