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import qemu-kvm-4.2.0-60.module+el8.5.0+14545+9e40c7b1.2

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CentOS Sources 2022-04-26 09:54:14 -04:00 committed by Stepan Oksanichenko
parent 4cda9e4498
commit 03df4f4cb3
8 changed files with 1107 additions and 1 deletions
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47
SOURCES/kvm-target-i386-Clarify-the-padding-requirements-of-X86X.patch Normal file
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@ -0,0 +1,47 @@
From 4da53939a51a5a834fae3fb8687603598d811269 Mon Sep 17 00:00:00 2001
From: David Edmondson <david.edmondson@oracle.com>
Date: Mon, 5 Jul 2021 11:46:27 +0100
Subject: [PATCH 3/7] target/i386: Clarify the padding requirements of
X86XSaveArea
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-MergeRequest: 113: non-av 8.5z: Fix XSAVE on newer CPUs
RH-Commit: [3/7] 789cb79b4ae08bd78479b0399821adba67139c76
RH-Bugzilla: 2065239
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Bandan Das <None>
Replace the hard-coded size of offsets or structure elements with
defined constants or sizeof().
Signed-off-by: David Edmondson <david.edmondson@oracle.com>
Message-Id: <20210705104632.2902400-4-david.edmondson@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit fde74821006472f40fee9a094e6da86cd39b5623)
---
target/i386/cpu.h | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 7c81d4bd6d..d586b5508d 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1296,7 +1296,13 @@ typedef struct X86XSaveArea {
/* AVX State: */
XSaveAVX avx_state;
- uint8_t padding[960 - 576 - sizeof(XSaveAVX)];
+
+ /* Ensure that XSaveBNDREG is properly aligned. */
+ uint8_t padding[XSAVE_BNDREG_OFFSET
+ - sizeof(X86LegacyXSaveArea)
+ - sizeof(X86XSaveHeader)
+ - sizeof(XSaveAVX)];
+
/* MPX State: */
XSaveBNDREG bndreg_state;
XSaveBNDCSR bndcsr_state;
--
2.27.0

118
SOURCES/kvm-target-i386-Consolidate-the-X86XSaveArea-offset-chec.patch Normal file
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@ -0,0 +1,118 @@
From 007e162cc8332faa132568656e0defc509ba658c Mon Sep 17 00:00:00 2001
From: David Edmondson <david.edmondson@oracle.com>
Date: Mon, 5 Jul 2021 11:46:26 +0100
Subject: [PATCH 2/7] target/i386: Consolidate the X86XSaveArea offset checks
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-MergeRequest: 113: non-av 8.5z: Fix XSAVE on newer CPUs
RH-Commit: [2/7] 308e45b88a5e8501947466d4cf11d1ae0a68e0d8
RH-Bugzilla: 2065239
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Bandan Das <None>
Rather than having similar but different checks in cpu.h and kvm.c,
move them all to cpu.h.
Message-Id: <20210705104632.2902400-3-david.edmondson@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 436463b84b75fad6ff962e45a2220a7d1d17557e)
---
target/i386/cpu.h | 22 +++++++++++++++-------
target/i386/kvm.c | 39 ---------------------------------------
2 files changed, 15 insertions(+), 46 deletions(-)
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 1fac5170a6..7c81d4bd6d 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1308,21 +1308,29 @@ typedef struct X86XSaveArea {
XSavePKRU pkru_state;
} X86XSaveArea;
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, avx_state) != XSAVE_AVX_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSaveAVX) != 0x100);
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, bndreg_state) != XSAVE_BNDREG_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSaveBNDREG) != 0x40);
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, bndcsr_state) != XSAVE_BNDCSR_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSaveBNDCSR) != 0x40);
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, opmask_state) != XSAVE_OPMASK_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSaveOpmask) != 0x40);
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, zmm_hi256_state) != XSAVE_ZMM_HI256_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSaveZMM_Hi256) != 0x200);
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, hi16_zmm_state) != XSAVE_HI16_ZMM_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSaveHi16_ZMM) != 0x400);
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, pkru_state) != XSAVE_PKRU_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSavePKRU) != 0x8);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, legacy.fcw) != XSAVE_FCW_FSW_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, legacy.ftw) != XSAVE_FTW_FOP_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, legacy.fpip) != XSAVE_CWD_RIP_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, legacy.fpdp) != XSAVE_CWD_RDP_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, legacy.mxcsr) != XSAVE_MXCSR_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, legacy.fpregs) != XSAVE_ST_SPACE_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, legacy.xmm_regs) != XSAVE_XMM_SPACE_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, avx_state) != XSAVE_AVX_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, bndreg_state) != XSAVE_BNDREG_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, bndcsr_state) != XSAVE_BNDCSR_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, opmask_state) != XSAVE_OPMASK_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, zmm_hi256_state) != XSAVE_ZMM_HI256_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, hi16_zmm_state) != XSAVE_HI16_ZMM_OFFSET);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, pkru_state) != XSAVE_PKRU_OFFSET);
+
typedef enum TPRAccess {
TPR_ACCESS_READ,
TPR_ACCESS_WRITE,
diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index f5c17e0028..215487b17d 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -2350,45 +2350,6 @@ static int kvm_put_fpu(X86CPU *cpu)
return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_FPU, &fpu);
}
-#define XSAVE_FCW_FSW 0
-#define XSAVE_FTW_FOP 1
-#define XSAVE_CWD_RIP 2
-#define XSAVE_CWD_RDP 4
-#define XSAVE_MXCSR 6
-#define XSAVE_ST_SPACE 8
-#define XSAVE_XMM_SPACE 40
-#define XSAVE_XSTATE_BV 128
-#define XSAVE_YMMH_SPACE 144
-#define XSAVE_BNDREGS 240
-#define XSAVE_BNDCSR 256
-#define XSAVE_OPMASK 272
-#define XSAVE_ZMM_Hi256 288
-#define XSAVE_Hi16_ZMM 416
-#define XSAVE_PKRU 672
-
-#define XSAVE_BYTE_OFFSET(word_offset) \
- ((word_offset) * sizeof_field(struct kvm_xsave, region[0]))
-
-#define ASSERT_OFFSET(word_offset, field) \
- QEMU_BUILD_BUG_ON(XSAVE_BYTE_OFFSET(word_offset) != \
- offsetof(X86XSaveArea, field))
-
-ASSERT_OFFSET(XSAVE_FCW_FSW, legacy.fcw);
-ASSERT_OFFSET(XSAVE_FTW_FOP, legacy.ftw);
-ASSERT_OFFSET(XSAVE_CWD_RIP, legacy.fpip);
-ASSERT_OFFSET(XSAVE_CWD_RDP, legacy.fpdp);
-ASSERT_OFFSET(XSAVE_MXCSR, legacy.mxcsr);
-ASSERT_OFFSET(XSAVE_ST_SPACE, legacy.fpregs);
-ASSERT_OFFSET(XSAVE_XMM_SPACE, legacy.xmm_regs);
-ASSERT_OFFSET(XSAVE_XSTATE_BV, header.xstate_bv);
-ASSERT_OFFSET(XSAVE_YMMH_SPACE, avx_state);
-ASSERT_OFFSET(XSAVE_BNDREGS, bndreg_state);
-ASSERT_OFFSET(XSAVE_BNDCSR, bndcsr_state);
-ASSERT_OFFSET(XSAVE_OPMASK, opmask_state);
-ASSERT_OFFSET(XSAVE_ZMM_Hi256, zmm_hi256_state);
-ASSERT_OFFSET(XSAVE_Hi16_ZMM, hi16_zmm_state);
-ASSERT_OFFSET(XSAVE_PKRU, pkru_state);
-
static int kvm_put_xsave(X86CPU *cpu)
{
CPUX86State *env = &cpu->env;
--
2.27.0

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SOURCES/kvm-target-i386-Declare-constants-for-XSAVE-offsets.patch Normal file
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@ -0,0 +1,82 @@
From 2d657f560ad94d6a2459d6318d2d0a6847e6bba4 Mon Sep 17 00:00:00 2001
From: David Edmondson <david.edmondson@oracle.com>
Date: Mon, 5 Jul 2021 11:46:25 +0100
Subject: [PATCH 1/7] target/i386: Declare constants for XSAVE offsets
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-MergeRequest: 113: non-av 8.5z: Fix XSAVE on newer CPUs
RH-Commit: [1/7] 85ec92995a1f2488dea8f2c3b527b1b42f1ed882
RH-Bugzilla: 2065239
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Bandan Das <None>
Declare and use manifest constants for the XSAVE state component
offsets.
Signed-off-by: David Edmondson <david.edmondson@oracle.com>
Message-Id: <20210705104632.2902400-2-david.edmondson@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit ac7b7cae4e8598359a2a7557899904c9563a776a)
(cherry picked from commit 2644e6189fdf2ae5f19b5ac8cc2939e0d4e4c92f)
---
target/i386/cpu.h | 30 +++++++++++++++++++++++-------
1 file changed, 23 insertions(+), 7 deletions(-)
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 7a3aa40201..1fac5170a6 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1272,6 +1272,22 @@ typedef struct XSavePKRU {
uint32_t padding;
} XSavePKRU;
+#define XSAVE_FCW_FSW_OFFSET 0x000
+#define XSAVE_FTW_FOP_OFFSET 0x004
+#define XSAVE_CWD_RIP_OFFSET 0x008
+#define XSAVE_CWD_RDP_OFFSET 0x010
+#define XSAVE_MXCSR_OFFSET 0x018
+#define XSAVE_ST_SPACE_OFFSET 0x020
+#define XSAVE_XMM_SPACE_OFFSET 0x0a0
+#define XSAVE_XSTATE_BV_OFFSET 0x200
+#define XSAVE_AVX_OFFSET 0x240
+#define XSAVE_BNDREG_OFFSET 0x3c0
+#define XSAVE_BNDCSR_OFFSET 0x400
+#define XSAVE_OPMASK_OFFSET 0x440
+#define XSAVE_ZMM_HI256_OFFSET 0x480
+#define XSAVE_HI16_ZMM_OFFSET 0x680
+#define XSAVE_PKRU_OFFSET 0xa80
+
typedef struct X86XSaveArea {
X86LegacyXSaveArea legacy;
X86XSaveHeader header;
@@ -1292,19 +1308,19 @@ typedef struct X86XSaveArea {
XSavePKRU pkru_state;
} X86XSaveArea;
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, avx_state) != 0x240);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, avx_state) != XSAVE_AVX_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSaveAVX) != 0x100);
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, bndreg_state) != 0x3c0);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, bndreg_state) != XSAVE_BNDREG_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSaveBNDREG) != 0x40);
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, bndcsr_state) != 0x400);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, bndcsr_state) != XSAVE_BNDCSR_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSaveBNDCSR) != 0x40);
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, opmask_state) != 0x440);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, opmask_state) != XSAVE_OPMASK_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSaveOpmask) != 0x40);
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, zmm_hi256_state) != 0x480);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, zmm_hi256_state) != XSAVE_ZMM_HI256_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSaveZMM_Hi256) != 0x200);
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, hi16_zmm_state) != 0x680);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, hi16_zmm_state) != XSAVE_HI16_ZMM_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSaveHi16_ZMM) != 0x400);
-QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, pkru_state) != 0xA80);
+QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, pkru_state) != XSAVE_PKRU_OFFSET);
QEMU_BUILD_BUG_ON(sizeof(XSavePKRU) != 0x8);
typedef enum TPRAccess {
--
2.27.0

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SOURCES/kvm-target-i386-Make-x86_ext_save_areas-visible-outside-.patch Normal file
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@ -0,0 +1,67 @@
From ea372e888f6fec3a34fb23975538fbdc9f14e3c6 Mon Sep 17 00:00:00 2001
From: David Edmondson <david.edmondson@oracle.com>
Date: Mon, 5 Jul 2021 11:46:29 +0100
Subject: [PATCH 5/7] target/i386: Make x86_ext_save_areas visible outside
cpu.c
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-MergeRequest: 113: non-av 8.5z: Fix XSAVE on newer CPUs
RH-Commit: [5/7] a643aa829daf4b985db081fc7cd9907331e4fb3f
RH-Bugzilla: 2065239
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Bandan Das <None>
Provide visibility of the x86_ext_save_areas array and associated type
outside of cpu.c.
Signed-off-by: David Edmondson <david.edmondson@oracle.com>
Message-Id: <20210705104632.2902400-6-david.edmondson@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 5aa10ab1a08e4123dee214a2f854909efb07b45b)
---
target/i386/cpu.c | 7 +------
target/i386/cpu.h | 9 +++++++++
2 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index d5b0d4b7f0..a030030299 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1504,12 +1504,7 @@ static const X86RegisterInfo32 x86_reg_info_32[CPU_NB_REGS32] = {
};
#undef REGISTER
-typedef struct ExtSaveArea {
- uint32_t feature, bits;
- uint32_t offset, size;
-} ExtSaveArea;
-
-static const ExtSaveArea x86_ext_save_areas[] = {
+const ExtSaveArea x86_ext_save_areas[XSAVE_STATE_AREA_COUNT] = {
[XSTATE_FP_BIT] = {
/* x87 FP state component is always enabled if XSAVE is supported */
.feature = FEAT_1_ECX, .bits = CPUID_EXT_XSAVE,
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 8daa83a6a3..cff2914203 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1337,6 +1337,15 @@ QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, zmm_hi256_state) != XSAVE_ZMM_HI256_OFF
QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, hi16_zmm_state) != XSAVE_HI16_ZMM_OFFSET);
QEMU_BUILD_BUG_ON(offsetof(X86XSaveArea, pkru_state) != XSAVE_PKRU_OFFSET);
+typedef struct ExtSaveArea {
+ uint32_t feature, bits;
+ uint32_t offset, size;
+} ExtSaveArea;
+
+#define XSAVE_STATE_AREA_COUNT (XSTATE_PKRU_BIT + 1)
+
+extern const ExtSaveArea x86_ext_save_areas[XSAVE_STATE_AREA_COUNT];
+
typedef enum TPRAccess {
TPR_ACCESS_READ,
TPR_ACCESS_WRITE,
--
2.27.0

341
SOURCES/kvm-target-i386-Observe-XSAVE-state-area-offsets.patch Normal file
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@ -0,0 +1,341 @@
From d6f29071cce7c162df253a8fbfd6de691be5fff9 Mon Sep 17 00:00:00 2001
From: David Edmondson <david.edmondson@oracle.com>
Date: Mon, 5 Jul 2021 11:46:30 +0100
Subject: [PATCH 6/7] target/i386: Observe XSAVE state area offsets
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-MergeRequest: 113: non-av 8.5z: Fix XSAVE on newer CPUs
RH-Commit: [6/7] 3741a121957cd10e4d160da22c056ff81b6bc62f
RH-Bugzilla: 2065239
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Bandan Das <None>
Rather than relying on the X86XSaveArea structure definition directly,
the routines that manipulate the XSAVE state area should observe the
offsets declared in the x86_ext_save_areas array.
Currently the offsets declared in the array are derived from the
structure definition, resulting in no functional change.
Signed-off-by: David Edmondson <david.edmondson@oracle.com>
Message-Id: <20210705104632.2902400-7-david.edmondson@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 3568987f78faff90829ea6c885bbdd5b083dc86c)
---
target/i386/xsave_helper.c | 262 ++++++++++++++++++++++++++++---------
1 file changed, 200 insertions(+), 62 deletions(-)
diff --git a/target/i386/xsave_helper.c b/target/i386/xsave_helper.c
index b16c6ac0fe..ac61a96344 100644
--- a/target/i386/xsave_helper.c
+++ b/target/i386/xsave_helper.c
@@ -9,13 +9,20 @@
void x86_cpu_xsave_all_areas(X86CPU *cpu, void *buf, uint32_t buflen)
{
CPUX86State *env = &cpu->env;
- X86XSaveArea *xsave = buf;
- uint16_t cwd, swd, twd;
+ const ExtSaveArea *e, *f;
int i;
- assert(buflen >= sizeof(*xsave));
+ X86LegacyXSaveArea *legacy;
+ X86XSaveHeader *header;
+ uint16_t cwd, swd, twd;
+
+ memset(buf, 0, buflen);
+
+ e = &x86_ext_save_areas[XSTATE_FP_BIT];
+
+ legacy = buf + e->offset;
+ header = buf + e->offset + sizeof(*legacy);
- memset(xsave, 0, buflen);
twd = 0;
swd = env->fpus & ~(7 << 11);
swd |= (env->fpstt & 7) << 11;
@@ -23,91 +30,222 @@ void x86_cpu_xsave_all_areas(X86CPU *cpu, void *buf, uint32_t buflen)
for (i = 0; i < 8; ++i) {
twd |= (!env->fptags[i]) << i;
}
- xsave->legacy.fcw = cwd;
- xsave->legacy.fsw = swd;
- xsave->legacy.ftw = twd;
- xsave->legacy.fpop = env->fpop;
- xsave->legacy.fpip = env->fpip;
- xsave->legacy.fpdp = env->fpdp;
- memcpy(&xsave->legacy.fpregs, env->fpregs,
- sizeof env->fpregs);
- xsave->legacy.mxcsr = env->mxcsr;
- xsave->header.xstate_bv = env->xstate_bv;
- memcpy(&xsave->bndreg_state.bnd_regs, env->bnd_regs,
- sizeof env->bnd_regs);
- xsave->bndcsr_state.bndcsr = env->bndcs_regs;
- memcpy(&xsave->opmask_state.opmask_regs, env->opmask_regs,
- sizeof env->opmask_regs);
+ legacy->fcw = cwd;
+ legacy->fsw = swd;
+ legacy->ftw = twd;
+ legacy->fpop = env->fpop;
+ legacy->fpip = env->fpip;
+ legacy->fpdp = env->fpdp;
+ memcpy(&legacy->fpregs, env->fpregs,
+ sizeof(env->fpregs));
+ legacy->mxcsr = env->mxcsr;
for (i = 0; i < CPU_NB_REGS; i++) {
- uint8_t *xmm = xsave->legacy.xmm_regs[i];
- uint8_t *ymmh = xsave->avx_state.ymmh[i];
- uint8_t *zmmh = xsave->zmm_hi256_state.zmm_hi256[i];
+ uint8_t *xmm = legacy->xmm_regs[i];
+
stq_p(xmm, env->xmm_regs[i].ZMM_Q(0));
- stq_p(xmm+8, env->xmm_regs[i].ZMM_Q(1));
- stq_p(ymmh, env->xmm_regs[i].ZMM_Q(2));
- stq_p(ymmh+8, env->xmm_regs[i].ZMM_Q(3));
- stq_p(zmmh, env->xmm_regs[i].ZMM_Q(4));
- stq_p(zmmh+8, env->xmm_regs[i].ZMM_Q(5));
- stq_p(zmmh+16, env->xmm_regs[i].ZMM_Q(6));
- stq_p(zmmh+24, env->xmm_regs[i].ZMM_Q(7));
+ stq_p(xmm + 8, env->xmm_regs[i].ZMM_Q(1));
+ }
+
+ header->xstate_bv = env->xstate_bv;
+
+ e = &x86_ext_save_areas[XSTATE_YMM_BIT];
+ if (e->size && e->offset) {
+ XSaveAVX *avx;
+
+ avx = buf + e->offset;
+
+ for (i = 0; i < CPU_NB_REGS; i++) {
+ uint8_t *ymmh = avx->ymmh[i];
+
+ stq_p(ymmh, env->xmm_regs[i].ZMM_Q(2));
+ stq_p(ymmh + 8, env->xmm_regs[i].ZMM_Q(3));
+ }
+ }
+
+ e = &x86_ext_save_areas[XSTATE_BNDREGS_BIT];
+ if (e->size && e->offset) {
+ XSaveBNDREG *bndreg;
+ XSaveBNDCSR *bndcsr;
+
+ f = &x86_ext_save_areas[XSTATE_BNDCSR_BIT];
+ assert(f->size);
+ assert(f->offset);
+
+ bndreg = buf + e->offset;
+ bndcsr = buf + f->offset;
+
+ memcpy(&bndreg->bnd_regs, env->bnd_regs,
+ sizeof(env->bnd_regs));
+ bndcsr->bndcsr = env->bndcs_regs;
}
+ e = &x86_ext_save_areas[XSTATE_OPMASK_BIT];
+ if (e->size && e->offset) {
+ XSaveOpmask *opmask;
+ XSaveZMM_Hi256 *zmm_hi256;
+#ifdef TARGET_X86_64
+ XSaveHi16_ZMM *hi16_zmm;
+#endif
+
+ f = &x86_ext_save_areas[XSTATE_ZMM_Hi256_BIT];
+ assert(f->size);
+ assert(f->offset);
+
+ opmask = buf + e->offset;
+ zmm_hi256 = buf + f->offset;
+
+ memcpy(&opmask->opmask_regs, env->opmask_regs,
+ sizeof(env->opmask_regs));
+
+ for (i = 0; i < CPU_NB_REGS; i++) {
+ uint8_t *zmmh = zmm_hi256->zmm_hi256[i];
+
+ stq_p(zmmh, env->xmm_regs[i].ZMM_Q(4));
+ stq_p(zmmh + 8, env->xmm_regs[i].ZMM_Q(5));
+ stq_p(zmmh + 16, env->xmm_regs[i].ZMM_Q(6));
+ stq_p(zmmh + 24, env->xmm_regs[i].ZMM_Q(7));
+ }
+
#ifdef TARGET_X86_64
- memcpy(&xsave->hi16_zmm_state.hi16_zmm, &env->xmm_regs[16],
- 16 * sizeof env->xmm_regs[16]);
- memcpy(&xsave->pkru_state, &env->pkru, sizeof env->pkru);
+ f = &x86_ext_save_areas[XSTATE_Hi16_ZMM_BIT];
+ assert(f->size);
+ assert(f->offset);
+
+ hi16_zmm = buf + f->offset;
+
+ memcpy(&hi16_zmm->hi16_zmm, &env->xmm_regs[16],
+ 16 * sizeof(env->xmm_regs[16]));
+#endif
+ }
+
+#ifdef TARGET_X86_64
+ e = &x86_ext_save_areas[XSTATE_PKRU_BIT];
+ if (e->size && e->offset) {
+ XSavePKRU *pkru = buf + e->offset;
+
+ memcpy(pkru, &env->pkru, sizeof(env->pkru));
+ }
#endif
}
void x86_cpu_xrstor_all_areas(X86CPU *cpu, const void *buf, uint32_t buflen)
{
CPUX86State *env = &cpu->env;
- const X86XSaveArea *xsave = buf;
+ const ExtSaveArea *e, *f, *g;
int i;
+
+ const X86LegacyXSaveArea *legacy;
+ const X86XSaveHeader *header;
uint16_t cwd, swd, twd;
- assert(buflen >= sizeof(*xsave));
+ e = &x86_ext_save_areas[XSTATE_FP_BIT];
- cwd = xsave->legacy.fcw;
- swd = xsave->legacy.fsw;
- twd = xsave->legacy.ftw;
- env->fpop = xsave->legacy.fpop;
+ legacy = buf + e->offset;
+ header = buf + e->offset + sizeof(*legacy);
+
+ cwd = legacy->fcw;
+ swd = legacy->fsw;
+ twd = legacy->ftw;
+ env->fpop = legacy->fpop;
env->fpstt = (swd >> 11) & 7;
env->fpus = swd;
env->fpuc = cwd;
for (i = 0; i < 8; ++i) {
env->fptags[i] = !((twd >> i) & 1);
}
- env->fpip = xsave->legacy.fpip;
- env->fpdp = xsave->legacy.fpdp;
- env->mxcsr = xsave->legacy.mxcsr;
- memcpy(env->fpregs, &xsave->legacy.fpregs,
- sizeof env->fpregs);
- env->xstate_bv = xsave->header.xstate_bv;
- memcpy(env->bnd_regs, &xsave->bndreg_state.bnd_regs,
- sizeof env->bnd_regs);
- env->bndcs_regs = xsave->bndcsr_state.bndcsr;
- memcpy(env->opmask_regs, &xsave->opmask_state.opmask_regs,
- sizeof env->opmask_regs);
+ env->fpip = legacy->fpip;
+ env->fpdp = legacy->fpdp;
+ env->mxcsr = legacy->mxcsr;
+ memcpy(env->fpregs, &legacy->fpregs,
+ sizeof(env->fpregs));
for (i = 0; i < CPU_NB_REGS; i++) {
- const uint8_t *xmm = xsave->legacy.xmm_regs[i];
- const uint8_t *ymmh = xsave->avx_state.ymmh[i];
- const uint8_t *zmmh = xsave->zmm_hi256_state.zmm_hi256[i];
+ const uint8_t *xmm = legacy->xmm_regs[i];
+
env->xmm_regs[i].ZMM_Q(0) = ldq_p(xmm);
- env->xmm_regs[i].ZMM_Q(1) = ldq_p(xmm+8);
- env->xmm_regs[i].ZMM_Q(2) = ldq_p(ymmh);
- env->xmm_regs[i].ZMM_Q(3) = ldq_p(ymmh+8);
- env->xmm_regs[i].ZMM_Q(4) = ldq_p(zmmh);
- env->xmm_regs[i].ZMM_Q(5) = ldq_p(zmmh+8);
- env->xmm_regs[i].ZMM_Q(6) = ldq_p(zmmh+16);
- env->xmm_regs[i].ZMM_Q(7) = ldq_p(zmmh+24);
+ env->xmm_regs[i].ZMM_Q(1) = ldq_p(xmm + 8);
+ }
+
+ env->xstate_bv = header->xstate_bv;
+
+ e = &x86_ext_save_areas[XSTATE_YMM_BIT];
+ if (e->size && e->offset) {
+ const XSaveAVX *avx;
+
+ avx = buf + e->offset;
+ for (i = 0; i < CPU_NB_REGS; i++) {
+ const uint8_t *ymmh = avx->ymmh[i];
+
+ env->xmm_regs[i].ZMM_Q(2) = ldq_p(ymmh);
+ env->xmm_regs[i].ZMM_Q(3) = ldq_p(ymmh + 8);
+ }
+ }
+
+ e = &x86_ext_save_areas[XSTATE_BNDREGS_BIT];
+ if (e->size && e->offset) {
+ const XSaveBNDREG *bndreg;
+ const XSaveBNDCSR *bndcsr;
+
+ f = &x86_ext_save_areas[XSTATE_BNDCSR_BIT];
+ assert(f->size);
+ assert(f->offset);
+
+ bndreg = buf + e->offset;
+ bndcsr = buf + f->offset;
+
+ memcpy(env->bnd_regs, &bndreg->bnd_regs,
+ sizeof(env->bnd_regs));
+ env->bndcs_regs = bndcsr->bndcsr;
}
+ e = &x86_ext_save_areas[XSTATE_OPMASK_BIT];
+ if (e->size && e->offset) {
+ const XSaveOpmask *opmask;
+ const XSaveZMM_Hi256 *zmm_hi256;
#ifdef TARGET_X86_64
- memcpy(&env->xmm_regs[16], &xsave->hi16_zmm_state.hi16_zmm,
- 16 * sizeof env->xmm_regs[16]);
- memcpy(&env->pkru, &xsave->pkru_state, sizeof env->pkru);
+ const XSaveHi16_ZMM *hi16_zmm;
+#endif
+
+ f = &x86_ext_save_areas[XSTATE_ZMM_Hi256_BIT];
+ assert(f->size);
+ assert(f->offset);
+
+ g = &x86_ext_save_areas[XSTATE_Hi16_ZMM_BIT];
+ assert(g->size);
+ assert(g->offset);
+
+ opmask = buf + e->offset;
+ zmm_hi256 = buf + f->offset;
+#ifdef TARGET_X86_64
+ hi16_zmm = buf + g->offset;
+#endif
+
+ memcpy(env->opmask_regs, &opmask->opmask_regs,
+ sizeof(env->opmask_regs));
+
+ for (i = 0; i < CPU_NB_REGS; i++) {
+ const uint8_t *zmmh = zmm_hi256->zmm_hi256[i];
+
+ env->xmm_regs[i].ZMM_Q(4) = ldq_p(zmmh);
+ env->xmm_regs[i].ZMM_Q(5) = ldq_p(zmmh + 8);
+ env->xmm_regs[i].ZMM_Q(6) = ldq_p(zmmh + 16);
+ env->xmm_regs[i].ZMM_Q(7) = ldq_p(zmmh + 24);
+ }
+
+#ifdef TARGET_X86_64
+ memcpy(&env->xmm_regs[16], &hi16_zmm->hi16_zmm,
+ 16 * sizeof(env->xmm_regs[16]));
+#endif
+ }
+
+#ifdef TARGET_X86_64
+ e = &x86_ext_save_areas[XSTATE_PKRU_BIT];
+ if (e->size && e->offset) {
+ const XSavePKRU *pkru;
+
+ pkru = buf + e->offset;
+ memcpy(&env->pkru, pkru, sizeof(env->pkru));
+ }
#endif
}
--
2.27.0

213
SOURCES/kvm-target-i386-Pass-buffer-and-length-to-XSAVE-helper.patch Normal file
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@ -0,0 +1,213 @@
From 8a8d1ef278933a3c3a11f8d8c2985e0af71741b4 Mon Sep 17 00:00:00 2001
From: David Edmondson <david.edmondson@oracle.com>
Date: Mon, 5 Jul 2021 11:46:28 +0100
Subject: [PATCH 4/7] target/i386: Pass buffer and length to XSAVE helper
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-MergeRequest: 113: non-av 8.5z: Fix XSAVE on newer CPUs
RH-Commit: [4/7] 77e093a6ed3928b9191b37faad3cb50b4bdd65e3
RH-Bugzilla: 2065239
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Bandan Das <None>
In preparation for removing assumptions about XSAVE area offsets, pass
a buffer pointer and buffer length to the XSAVE helper functions.
Signed-off-by: David Edmondson <david.edmondson@oracle.com>
Message-Id: <20210705104632.2902400-5-david.edmondson@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit c0198c5f87b6db25712672292e01ab710d6ef631)
dgilbert: Manual merge in target/i386/hvf/x86hvf.c
---
target/i386/cpu.h | 5 +++--
target/i386/hvf/hvf.c | 3 ++-
target/i386/hvf/x86hvf.c | 19 ++++++++-----------
target/i386/kvm.c | 13 +++++++------
target/i386/xsave_helper.c | 17 +++++++++--------
5 files changed, 29 insertions(+), 28 deletions(-)
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index d586b5508d..8daa83a6a3 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1626,6 +1626,7 @@ typedef struct CPUX86State {
int64_t user_tsc_khz; /* for sanity check only */
#if defined(CONFIG_KVM) || defined(CONFIG_HVF)
void *xsave_buf;
+ uint32_t xsave_buf_len;
#endif
#if defined(CONFIG_KVM)
struct kvm_nested_state *nested_state;
@@ -2254,8 +2255,8 @@ void x86_cpu_dump_local_apic_state(CPUState *cs, int flags);
/* cpu.c */
bool cpu_is_bsp(X86CPU *cpu);
-void x86_cpu_xrstor_all_areas(X86CPU *cpu, const X86XSaveArea *buf);
-void x86_cpu_xsave_all_areas(X86CPU *cpu, X86XSaveArea *buf);
+void x86_cpu_xrstor_all_areas(X86CPU *cpu, const void *buf, uint32_t buflen);
+void x86_cpu_xsave_all_areas(X86CPU *cpu, void *buf, uint32_t buflen);
void x86_update_hflags(CPUX86State* env);
static inline bool hyperv_feat_enabled(X86CPU *cpu, int feat)
diff --git a/target/i386/hvf/hvf.c b/target/i386/hvf/hvf.c
index d72543dc31..bbede52fb7 100644
--- a/target/i386/hvf/hvf.c
+++ b/target/i386/hvf/hvf.c
@@ -609,7 +609,8 @@ int hvf_init_vcpu(CPUState *cpu)
wvmcs(cpu->hvf_fd, VMCS_TPR_THRESHOLD, 0);
x86cpu = X86_CPU(cpu);
- x86cpu->env.xsave_buf = qemu_memalign(4096, 4096);
+ x86cpu->env.xsave_buf_len = 4096;
+ x86cpu->env.xsave_buf = qemu_memalign(4096, x86cpu->env.xsave_buf_len);
hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_STAR, 1);
hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_LSTAR, 1);
diff --git a/target/i386/hvf/x86hvf.c b/target/i386/hvf/x86hvf.c
index edefe5319a..7be0582f28 100644
--- a/target/i386/hvf/x86hvf.c
+++ b/target/i386/hvf/x86hvf.c
@@ -72,14 +72,12 @@ void hvf_get_segment(SegmentCache *qseg, struct vmx_segment *vmx_seg)
void hvf_put_xsave(CPUState *cpu_state)
{
+ void *xsave = X86_CPU(cpu_state)->env.xsave_buf;
+ uint32_t xsave_len = X86_CPU(cpu_state)->env.xsave_buf_len;
- struct X86XSaveArea *xsave;
+ x86_cpu_xsave_all_areas(X86_CPU(cpu_state), xsave, xsave_len);
- xsave = X86_CPU(cpu_state)->env.xsave_buf;
-
- x86_cpu_xsave_all_areas(X86_CPU(cpu_state), xsave);
-
- if (hv_vcpu_write_fpstate(cpu_state->hvf_fd, (void*)xsave, 4096)) {
+ if (hv_vcpu_write_fpstate(cpu_state->hvf_fd, xsave, xsave_len)) {
abort();
}
}
@@ -157,15 +155,14 @@ void hvf_put_msrs(CPUState *cpu_state)
void hvf_get_xsave(CPUState *cpu_state)
{
- struct X86XSaveArea *xsave;
-
- xsave = X86_CPU(cpu_state)->env.xsave_buf;
+ void *xsave = X86_CPU(cpu_state)->env.xsave_buf;
+ uint32_t xsave_len = X86_CPU(cpu_state)->env.xsave_buf_len;
- if (hv_vcpu_read_fpstate(cpu_state->hvf_fd, (void*)xsave, 4096)) {
+ if (hv_vcpu_read_fpstate(cpu_state->hvf_fd, xsave, xsave_len)) {
abort();
}
- x86_cpu_xrstor_all_areas(X86_CPU(cpu_state), xsave);
+ x86_cpu_xrstor_all_areas(X86_CPU(cpu_state), xsave, xsave_len);
}
void hvf_get_segments(CPUState *cpu_state)
diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 215487b17d..8167587445 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -1826,8 +1826,9 @@ int kvm_arch_init_vcpu(CPUState *cs)
}
if (has_xsave) {
- env->xsave_buf = qemu_memalign(4096, sizeof(struct kvm_xsave));
- memset(env->xsave_buf, 0, sizeof(struct kvm_xsave));
+ env->xsave_buf_len = sizeof(struct kvm_xsave);
+ env->xsave_buf = qemu_memalign(4096, env->xsave_buf_len);
+ memset(env->xsave_buf, 0, env->xsave_buf_len);
}
max_nested_state_len = kvm_max_nested_state_length();
@@ -2353,12 +2354,12 @@ static int kvm_put_fpu(X86CPU *cpu)
static int kvm_put_xsave(X86CPU *cpu)
{
CPUX86State *env = &cpu->env;
- X86XSaveArea *xsave = env->xsave_buf;
+ void *xsave = env->xsave_buf;
if (!has_xsave) {
return kvm_put_fpu(cpu);
}
- x86_cpu_xsave_all_areas(cpu, xsave);
+ x86_cpu_xsave_all_areas(cpu, xsave, env->xsave_buf_len);
return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_XSAVE, xsave);
}
@@ -2977,7 +2978,7 @@ static int kvm_get_fpu(X86CPU *cpu)
static int kvm_get_xsave(X86CPU *cpu)
{
CPUX86State *env = &cpu->env;
- X86XSaveArea *xsave = env->xsave_buf;
+ void *xsave = env->xsave_buf;
int ret;
if (!has_xsave) {
@@ -2988,7 +2989,7 @@ static int kvm_get_xsave(X86CPU *cpu)
if (ret < 0) {
return ret;
}
- x86_cpu_xrstor_all_areas(cpu, xsave);
+ x86_cpu_xrstor_all_areas(cpu, xsave, env->xsave_buf_len);
return 0;
}
diff --git a/target/i386/xsave_helper.c b/target/i386/xsave_helper.c
index 818115e7d2..b16c6ac0fe 100644
--- a/target/i386/xsave_helper.c
+++ b/target/i386/xsave_helper.c
@@ -6,14 +6,16 @@
#include "cpu.h"
-void x86_cpu_xsave_all_areas(X86CPU *cpu, X86XSaveArea *buf)
+void x86_cpu_xsave_all_areas(X86CPU *cpu, void *buf, uint32_t buflen)
{
CPUX86State *env = &cpu->env;
X86XSaveArea *xsave = buf;
-
uint16_t cwd, swd, twd;
int i;
- memset(xsave, 0, sizeof(X86XSaveArea));
+
+ assert(buflen >= sizeof(*xsave));
+
+ memset(xsave, 0, buflen);
twd = 0;
swd = env->fpus & ~(7 << 11);
swd |= (env->fpstt & 7) << 11;
@@ -56,17 +58,17 @@ void x86_cpu_xsave_all_areas(X86CPU *cpu, X86XSaveArea *buf)
16 * sizeof env->xmm_regs[16]);
memcpy(&xsave->pkru_state, &env->pkru, sizeof env->pkru);
#endif
-
}
-void x86_cpu_xrstor_all_areas(X86CPU *cpu, const X86XSaveArea *buf)
+void x86_cpu_xrstor_all_areas(X86CPU *cpu, const void *buf, uint32_t buflen)
{
-
CPUX86State *env = &cpu->env;
const X86XSaveArea *xsave = buf;
-
int i;
uint16_t cwd, swd, twd;
+
+ assert(buflen >= sizeof(*xsave));
+
cwd = xsave->legacy.fcw;
swd = xsave->legacy.fsw;
twd = xsave->legacy.ftw;
@@ -108,5 +110,4 @@ void x86_cpu_xrstor_all_areas(X86CPU *cpu, const X86XSaveArea *buf)
16 * sizeof env->xmm_regs[16]);
memcpy(&env->pkru, &xsave->pkru_state, sizeof env->pkru);
#endif
-
}
--
2.27.0

213
SOURCES/kvm-target-i386-Populate-x86_ext_save_areas-offsets-usin.patch Normal file
View File

@ -0,0 +1,213 @@
From ae580956fc0ed8feb794b6392df59ff5de673565 Mon Sep 17 00:00:00 2001
From: David Edmondson <david.edmondson@oracle.com>
Date: Mon, 5 Jul 2021 11:46:31 +0100
Subject: [PATCH 7/7] target/i386: Populate x86_ext_save_areas offsets using
cpuid where possible
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-MergeRequest: 113: non-av 8.5z: Fix XSAVE on newer CPUs
RH-Commit: [7/7] 145fc1dd5232673e2070423a027cad38fa4c4890
RH-Bugzilla: 2065239
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Bandan Das <None>
Rather than relying on the X86XSaveArea structure definition,
determine the offset of XSAVE state areas using CPUID leaf 0xd where
possible (KVM and HVF).
Signed-off-by: David Edmondson <david.edmondson@oracle.com>
Message-Id: <20210705104632.2902400-8-david.edmondson@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit fea4500841024195ec701713e05b92ebf667f192)
dgilbert: Hairy backport, since we've not got Claudio's cpu
accelerator split
---
target/i386/cpu.c | 65 +++++++++++++++++++++++++++++++++++--------
target/i386/cpu.h | 2 +-
target/i386/hvf/hvf.c | 17 ++++-------
target/i386/kvm.c | 7 +++++
4 files changed, 66 insertions(+), 25 deletions(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index a030030299..c52eae1f0d 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1504,48 +1504,37 @@ static const X86RegisterInfo32 x86_reg_info_32[CPU_NB_REGS32] = {
};
#undef REGISTER
-const ExtSaveArea x86_ext_save_areas[XSAVE_STATE_AREA_COUNT] = {
+ExtSaveArea x86_ext_save_areas[XSAVE_STATE_AREA_COUNT] = {
[XSTATE_FP_BIT] = {
/* x87 FP state component is always enabled if XSAVE is supported */
.feature = FEAT_1_ECX, .bits = CPUID_EXT_XSAVE,
- /* x87 state is in the legacy region of the XSAVE area */
- .offset = 0,
.size = sizeof(X86LegacyXSaveArea) + sizeof(X86XSaveHeader),
},
[XSTATE_SSE_BIT] = {
/* SSE state component is always enabled if XSAVE is supported */
.feature = FEAT_1_ECX, .bits = CPUID_EXT_XSAVE,
- /* SSE state is in the legacy region of the XSAVE area */
- .offset = 0,
.size = sizeof(X86LegacyXSaveArea) + sizeof(X86XSaveHeader),
},
[XSTATE_YMM_BIT] =
{ .feature = FEAT_1_ECX, .bits = CPUID_EXT_AVX,
- .offset = offsetof(X86XSaveArea, avx_state),
.size = sizeof(XSaveAVX) },
[XSTATE_BNDREGS_BIT] =
{ .feature = FEAT_7_0_EBX, .bits = CPUID_7_0_EBX_MPX,
- .offset = offsetof(X86XSaveArea, bndreg_state),
.size = sizeof(XSaveBNDREG) },
[XSTATE_BNDCSR_BIT] =
{ .feature = FEAT_7_0_EBX, .bits = CPUID_7_0_EBX_MPX,
- .offset = offsetof(X86XSaveArea, bndcsr_state),
.size = sizeof(XSaveBNDCSR) },
[XSTATE_OPMASK_BIT] =
{ .feature = FEAT_7_0_EBX, .bits = CPUID_7_0_EBX_AVX512F,
- .offset = offsetof(X86XSaveArea, opmask_state),
.size = sizeof(XSaveOpmask) },
[XSTATE_ZMM_Hi256_BIT] =
{ .feature = FEAT_7_0_EBX, .bits = CPUID_7_0_EBX_AVX512F,
- .offset = offsetof(X86XSaveArea, zmm_hi256_state),
.size = sizeof(XSaveZMM_Hi256) },
[XSTATE_Hi16_ZMM_BIT] =
{ .feature = FEAT_7_0_EBX, .bits = CPUID_7_0_EBX_AVX512F,
- .offset = offsetof(X86XSaveArea, hi16_zmm_state),
.size = sizeof(XSaveHi16_ZMM) },
[XSTATE_PKRU_BIT] =
{ .feature = FEAT_7_0_ECX, .bits = CPUID_7_0_ECX_PKU,
- .offset = offsetof(X86XSaveArea, pkru_state),
.size = sizeof(XSavePKRU) },
};
@@ -5237,6 +5226,52 @@ static void x86_cpu_apply_version_props(X86CPU *cpu, X86CPUModel *model)
assert(vdef->version == version);
}
+static void kvm_cpu_xsave_init(void)
+{
+ static bool first = true;
+ KVMState *s = kvm_state;
+ int i;
+
+ if (!first) {
+ return;
+ }
+ first = false;
+
+ /* x87 and SSE states are in the legacy region of the XSAVE area. */
+ x86_ext_save_areas[XSTATE_FP_BIT].offset = 0;
+ x86_ext_save_areas[XSTATE_SSE_BIT].offset = 0;
+
+ for (i = XSTATE_SSE_BIT + 1; i < XSAVE_STATE_AREA_COUNT; i++) {
+ ExtSaveArea *esa = &x86_ext_save_areas[i];
+
+ if (esa->size) {
+ int sz = kvm_arch_get_supported_cpuid(s, 0xd, i, R_EAX);
+ if (sz != 0) {
+ assert(esa->size == sz);
+ esa->offset = kvm_arch_get_supported_cpuid(s, 0xd, i, R_EBX);
+ }
+ }
+ }
+}
+
+static void tcg_cpu_xsave_init(void)
+{
+#define XO(bit, field) \
+ x86_ext_save_areas[bit].offset = offsetof(X86XSaveArea, field);
+
+ XO(XSTATE_FP_BIT, legacy);
+ XO(XSTATE_SSE_BIT, legacy);
+ XO(XSTATE_YMM_BIT, avx_state);
+ XO(XSTATE_BNDREGS_BIT, bndreg_state);
+ XO(XSTATE_BNDCSR_BIT, bndcsr_state);
+ XO(XSTATE_OPMASK_BIT, opmask_state);
+ XO(XSTATE_ZMM_Hi256_BIT, zmm_hi256_state);
+ XO(XSTATE_Hi16_ZMM_BIT, hi16_zmm_state);
+ XO(XSTATE_PKRU_BIT, pkru_state);
+
+#undef XO
+}
+
/* Load data from X86CPUDefinition into a X86CPU object
*/
static void x86_cpu_load_model(X86CPU *cpu, X86CPUModel *model, Error **errp)
@@ -7147,6 +7182,12 @@ static void x86_cpu_initfn(Object *obj)
if (xcc->model) {
x86_cpu_load_model(cpu, xcc->model, &error_abort);
}
+
+ if (kvm_enabled()) {
+ kvm_cpu_xsave_init();
+ } else if (tcg_enabled()) {
+ tcg_cpu_xsave_init();
+ }
}
static int64_t x86_cpu_get_arch_id(CPUState *cs)
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index cff2914203..53895a97dd 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1344,7 +1344,7 @@ typedef struct ExtSaveArea {
#define XSAVE_STATE_AREA_COUNT (XSTATE_PKRU_BIT + 1)
-extern const ExtSaveArea x86_ext_save_areas[XSAVE_STATE_AREA_COUNT];
+extern ExtSaveArea x86_ext_save_areas[XSAVE_STATE_AREA_COUNT];
typedef enum TPRAccess {
TPR_ACCESS_READ,
diff --git a/target/i386/hvf/hvf.c b/target/i386/hvf/hvf.c
index bbede52fb7..de29137bec 100644
--- a/target/i386/hvf/hvf.c
+++ b/target/i386/hvf/hvf.c
@@ -612,18 +612,11 @@ int hvf_init_vcpu(CPUState *cpu)
x86cpu->env.xsave_buf_len = 4096;
x86cpu->env.xsave_buf = qemu_memalign(4096, x86cpu->env.xsave_buf_len);
- hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_STAR, 1);
- hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_LSTAR, 1);
- hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_CSTAR, 1);
- hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_FMASK, 1);
- hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_FSBASE, 1);
- hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_GSBASE, 1);
- hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_KERNELGSBASE, 1);
- hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_TSC_AUX, 1);
- hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_IA32_TSC, 1);
- hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_IA32_SYSENTER_CS, 1);
- hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_IA32_SYSENTER_EIP, 1);
- hv_vcpu_enable_native_msr(cpu->hvf_fd, MSR_IA32_SYSENTER_ESP, 1);
+ /*
+ * The allocated storage must be large enough for all of the
+ * possible XSAVE state components.
+ */
+ assert(hvf_get_supported_cpuid(0xd, 0, R_ECX) <= x86cpu->env.xsave_buf_len);
return 0;
}
diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 8167587445..548c5e94bb 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -1829,6 +1829,13 @@ int kvm_arch_init_vcpu(CPUState *cs)
env->xsave_buf_len = sizeof(struct kvm_xsave);
env->xsave_buf = qemu_memalign(4096, env->xsave_buf_len);
memset(env->xsave_buf, 0, env->xsave_buf_len);
+
+ /*
+ * The allocated storage must be large enough for all of the
+ * possible XSAVE state components.
+ */
+ assert(kvm_arch_get_supported_cpuid(kvm_state, 0xd, 0, R_ECX)
+ <= env->xsave_buf_len);
}
max_nested_state_len = kvm_max_nested_state_length();
--
2.27.0

27
SPECS/qemu-kvm.spec
View File

@ -67,7 +67,7 @@ Obsoletes: %1-rhev <= %{epoch}:%{version}-%{release}
Summary: QEMU is a machine emulator and virtualizer
Name: qemu-kvm
Version: 4.2.0
Release: 59%{?dist}.2
Release: 60%{?dist}.2
# Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
Epoch: 15
License: GPLv2 and GPLv2+ and CC-BY
@ -1254,6 +1254,20 @@ Patch545: kvm-hw-scsi-scsi-disk-MODE_PAGE_ALLS-not-allowed-in-MODE.patch
Patch546: kvm-e1000-fix-tx-re-entrancy-problem.patch
# For bz#2048627 - CVE-2022-0358 virt:rhel/qemu-kvm: QEMU: virtiofsd: potential privilege escalation via CVE-2018-13405 [rhel-8.5.0.z]
Patch547: kvm-virtiofsd-Drop-membership-of-all-supplementary-group.patch
# For bz#2065239 - KVM Fedora 35 guest x86 programs randomly crash in signal handler [rhel-8.5.0.z]
Patch548: kvm-target-i386-Declare-constants-for-XSAVE-offsets.patch
# For bz#2065239 - KVM Fedora 35 guest x86 programs randomly crash in signal handler [rhel-8.5.0.z]
Patch549: kvm-target-i386-Consolidate-the-X86XSaveArea-offset-chec.patch
# For bz#2065239 - KVM Fedora 35 guest x86 programs randomly crash in signal handler [rhel-8.5.0.z]
Patch550: kvm-target-i386-Clarify-the-padding-requirements-of-X86X.patch
# For bz#2065239 - KVM Fedora 35 guest x86 programs randomly crash in signal handler [rhel-8.5.0.z]
Patch551: kvm-target-i386-Pass-buffer-and-length-to-XSAVE-helper.patch
# For bz#2065239 - KVM Fedora 35 guest x86 programs randomly crash in signal handler [rhel-8.5.0.z]
Patch552: kvm-target-i386-Make-x86_ext_save_areas-visible-outside-.patch
# For bz#2065239 - KVM Fedora 35 guest x86 programs randomly crash in signal handler [rhel-8.5.0.z]
Patch553: kvm-target-i386-Observe-XSAVE-state-area-offsets.patch
# For bz#2065239 - KVM Fedora 35 guest x86 programs randomly crash in signal handler [rhel-8.5.0.z]
Patch554: kvm-target-i386-Populate-x86_ext_save_areas-offsets-usin.patch
BuildRequires: wget
BuildRequires: rpm-build
@ -2202,6 +2216,17 @@ useradd -r -u 107 -g qemu -G kvm -d / -s /sbin/nologin \
%changelog
* Tue Mar 22 2022 Jon Maloy <jmaloy@redhat.com> - 4.2.0-60.el8_5.2
- kvm-target-i386-Declare-constants-for-XSAVE-offsets.patch [bz#2065239]
- kvm-target-i386-Consolidate-the-X86XSaveArea-offset-chec.patch [bz#2065239]
- kvm-target-i386-Clarify-the-padding-requirements-of-X86X.patch [bz#2065239]
- kvm-target-i386-Pass-buffer-and-length-to-XSAVE-helper.patch [bz#2065239]
- kvm-target-i386-Make-x86_ext_save_areas-visible-outside-.patch [bz#2065239]
- kvm-target-i386-Observe-XSAVE-state-area-offsets.patch [bz#2065239]
- kvm-target-i386-Populate-x86_ext_save_areas-offsets-usin.patch [bz#2065239]
- Resolves: bz#2065239
(KVM Fedora 35 guest x86 programs randomly crash in signal handler [rhel-8.5.0.z])
* Tue Feb 08 2022 Jon Maloy <jmaloy@redhat.com> - 4.2.0-59.el8_5.2
- kvm-virtiofsd-Drop-membership-of-all-supplementary-group.patch [bz#2048627]
- Resolves: bz#2048627