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[PULL 28/92] i386/cpu: Clear FEAT_XSAVE_COMP_{LO, HI} when XSAVE is not
From: |
Paolo Bonzini |
Subject: |
[PULL 28/92] i386/cpu: Clear FEAT_XSAVE_COMP_{LO, HI} when XSAVE is not available |
Date: |
Thu, 24 Sep 2020 05:22:10 -0400 |
From: Xiaoyao Li <xiaoyao.li@intel.com>
Per Intel SDM vol 1, 13.2, if CPUID.1:ECX.XSAVE[bit 26] is 0, the
processor provides no further enumeration through CPUID function 0DH.
QEMU does not do this for "-cpu host,-xsave".
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-Id: <20200716082019.215316-2-xiaoyao.li@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
target/i386/cpu.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 23e9a17a04..7eb708bedb 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -6268,6 +6268,8 @@ static void x86_cpu_enable_xsave_components(X86CPU *cpu)
uint64_t mask;
if (!(env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE)) {
+ env->features[FEAT_XSAVE_COMP_LO] = 0;
+ env->features[FEAT_XSAVE_COMP_HI] = 0;
return;
}
--
2.26.2
- [PULL 10/92] memory: Convert IOMMUMemoryRegionClass doc comment to kernel-doc, (continued)
- [PULL 10/92] memory: Convert IOMMUMemoryRegionClass doc comment to kernel-doc, Paolo Bonzini, 2020/09/24
- [PULL 15/92] numa: remove fixup numa_state->num_nodes to MAX_NODES, Paolo Bonzini, 2020/09/24
- [PULL 12/92] acpi: i386: Move VMBus DSDT entry to SB, Paolo Bonzini, 2020/09/24
- [PULL 11/92] vhost-scsi: support inflight io track, Paolo Bonzini, 2020/09/24
- [PULL 14/92] doc: Cleanup "'-mem-path' fallback to RAM" deprecation text, Paolo Bonzini, 2020/09/24
- [PULL 13/92] numa: drop support for '-numa node' (without memory specified), Paolo Bonzini, 2020/09/24
- [PULL 17/92] hw/char/serial: Remove TYPE_SERIAL_IO, Paolo Bonzini, 2020/09/24
- [PULL 16/92] hw/mips/mipssim: Use MMIO serial device on fake ISA I/O, Paolo Bonzini, 2020/09/24
- [PULL 20/92] hw/char/serial: Replace commented DPRINTF() by trace event, Paolo Bonzini, 2020/09/24
- [PULL 19/92] hw/char/serial: Assert serial_ioport_read/write offset fits 8 bytes, Paolo Bonzini, 2020/09/24
- [PULL 28/92] i386/cpu: Clear FEAT_XSAVE_COMP_{LO, HI} when XSAVE is not available,
Paolo Bonzini <=
- [PULL 23/92] hw/char/serial: Make 'wakeup' property boolean, Paolo Bonzini, 2020/09/24
- [PULL 21/92] hw/char/serial: Remove old DEBUG_SERIAL commented code, Paolo Bonzini, 2020/09/24
- [PULL 25/92] scsi-generic: Fix HM-zoned device scan, Paolo Bonzini, 2020/09/24
- [PULL 27/92] hw: megasas: consider 'iov_count=0' is an error in megasas_map_sgl, Paolo Bonzini, 2020/09/24
- [PULL 18/92] configure: rename QEMU_GA_MSI_ENABLED to CONFIG_QGA_MSI, Paolo Bonzini, 2020/09/24
- [PULL 29/92] meson: move libudev test, Paolo Bonzini, 2020/09/24
- [PULL 31/92] meson: extend libmpathpersist test for static linking, Paolo Bonzini, 2020/09/24
- [PULL 22/92] hw/char/serial: Rename I/O read/write trace events, Paolo Bonzini, 2020/09/24
- [PULL 30/92] meson: move libmpathpersist test, Paolo Bonzini, 2020/09/24
- [PULL 33/92] configure: fix --meson=/path/to/meson, Paolo Bonzini, 2020/09/24