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From a2765b13bbe4a4d5978cd25f451b35dbb137ab6e Mon Sep 17 00:00:00 2001
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From: "plai@redhat.com" <plai@redhat.com>
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Date: Tue, 26 Nov 2019 19:36:49 +0000
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Subject: [PATCH 05/11] x86/cpu: Enable MOVDIRI cpu feature
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RH-Author: plai@redhat.com
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Message-id: <1574797015-32564-2-git-send-email-plai@redhat.com>
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Patchwork-id: 92696
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O-Subject: [RHEL8.2 qemu-kvm PATCH 1/7] x86/cpu: Enable MOVDIRI cpu feature
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Bugzilla: 1634827
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RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
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RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
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RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
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From: Liu Jingqi <jingqi.liu@intel.com>
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MOVDIRI moves doubleword or quadword from register to memory through
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direct store which is implemented by using write combining (WC) for
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writing data directly into memory without caching the data.
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The bit definition:
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CPUID.(EAX=7,ECX=0):ECX[bit 27] MOVDIRI
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The release document ref below link:
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https://software.intel.com/sites/default/files/managed/c5/15/\
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architecture-instruction-set-extensions-programming-reference.pdf
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Cc: Xu Tao <tao3.xu@intel.com>
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Signed-off-by: Liu Jingqi <jingqi.liu@intel.com>
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Message-Id: <1541488407-17045-2-git-send-email-jingqi.liu@intel.com>
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Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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(cherry picked from commit 24261de4916596d8ab5f5fee67e9e7a19e8325a5)
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Signed-off-by: Paul Lai <plai@redhat.com>
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Resolved Conflicts:
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target/i386/cpu.c
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target/i386/cpu.h
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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target/i386/cpu.c | 2 +-
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target/i386/cpu.h | 1 +
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2 files changed, 2 insertions(+), 1 deletion(-)
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diff --git a/target/i386/cpu.c b/target/i386/cpu.c
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index ef6b958..f2ab558 100644
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--- a/target/i386/cpu.c
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+++ b/target/i386/cpu.c
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@@ -1021,7 +1021,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
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"avx512bitalg", NULL, "avx512-vpopcntdq", NULL,
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"la57", NULL, NULL, NULL,
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NULL, NULL, "rdpid", NULL,
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- NULL, "cldemote", NULL, NULL,
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+ NULL, "cldemote", NULL, "movdiri",
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NULL, NULL, NULL, NULL,
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},
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.cpuid = {
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diff --git a/target/i386/cpu.h b/target/i386/cpu.h
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index 8d8814e..6ba0b1e 100644
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--- a/target/i386/cpu.h
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+++ b/target/i386/cpu.h
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@@ -718,6 +718,7 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS];
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#define CPUID_7_0_ECX_LA57 (1U << 16)
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#define CPUID_7_0_ECX_RDPID (1U << 22)
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#define CPUID_7_0_ECX_CLDEMOTE (1U << 25) /* CLDEMOTE Instruction */
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+#define CPUID_7_0_ECX_MOVDIRI (1U << 27) /* MOVDIRI Instruction */
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#define CPUID_7_0_EDX_AVX512_4VNNIW (1U << 2) /* AVX512 Neural Network Instructions */
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#define CPUID_7_0_EDX_AVX512_4FMAPS (1U << 3) /* AVX512 Multiply Accumulation Single Precision */
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--
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1.8.3.1
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