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-rw-r--r--sys-kernel/linux-image-redcore-lts-legacy/files/4.19-revert_52918ed5fcf05d97d257f4131e19479da18f5d16.patch91
-rw-r--r--sys-kernel/linux-image-redcore-lts-legacy/linux-image-redcore-lts-legacy-4.19.108-r2.ebuild (renamed from sys-kernel/linux-image-redcore-lts-legacy/linux-image-redcore-lts-legacy-4.19.108-r1.ebuild)3
-rw-r--r--sys-kernel/linux-sources-redcore-lts-legacy/files/4.19-revert_52918ed5fcf05d97d257f4131e19479da18f5d16.patch91
-rw-r--r--sys-kernel/linux-sources-redcore-lts-legacy/linux-sources-redcore-lts-legacy-4.19.108-r2.ebuild (renamed from sys-kernel/linux-sources-redcore-lts-legacy/linux-sources-redcore-lts-legacy-4.19.108-r1.ebuild)3
4 files changed, 186 insertions, 2 deletions
diff --git a/sys-kernel/linux-image-redcore-lts-legacy/files/4.19-revert_52918ed5fcf05d97d257f4131e19479da18f5d16.patch b/sys-kernel/linux-image-redcore-lts-legacy/files/4.19-revert_52918ed5fcf05d97d257f4131e19479da18f5d16.patch
new file mode 100644
index 00000000..d64d8efb
--- /dev/null
+++ b/sys-kernel/linux-image-redcore-lts-legacy/files/4.19-revert_52918ed5fcf05d97d257f4131e19479da18f5d16.patch
@@ -0,0 +1,91 @@
+From a4e761c9f63ae12c5e2fc586b77082fd07e54212 Mon Sep 17 00:00:00 2001
+From: Tom Lendacky <thomas.lendacky@amd.com>
+Date: Thu, 9 Jan 2020 17:42:16 -0600
+Subject: KVM: SVM: Override default MMIO mask if memory encryption is enabled
+
+commit 52918ed5fcf05d97d257f4131e19479da18f5d16 upstream.
+
+The KVM MMIO support uses bit 51 as the reserved bit to cause nested page
+faults when a guest performs MMIO. The AMD memory encryption support uses
+a CPUID function to define the encryption bit position. Given this, it is
+possible that these bits can conflict.
+
+Use svm_hardware_setup() to override the MMIO mask if memory encryption
+support is enabled. Various checks are performed to ensure that the mask
+is properly defined and rsvd_bits() is used to generate the new mask (as
+was done prior to the change that necessitated this patch).
+
+Fixes: 28a1f3ac1d0c ("kvm: x86: Set highest physical address bits in non-present/reserved SPTEs")
+Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com>
+Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
+Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
+Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ arch/x86/kvm/svm.c | 43 +++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 43 insertions(+)
+
+diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
+index 0219693bf08e..3f0565e1a7a8 100644
+--- a/arch/x86/kvm/svm.c
++++ b/arch/x86/kvm/svm.c
+@@ -1298,6 +1298,47 @@ static void shrink_ple_window(struct kvm_vcpu *vcpu)
+ control->pause_filter_count, old);
+ }
+
++/*
++ * The default MMIO mask is a single bit (excluding the present bit),
++ * which could conflict with the memory encryption bit. Check for
++ * memory encryption support and override the default MMIO mask if
++ * memory encryption is enabled.
++ */
++static __init void svm_adjust_mmio_mask(void)
++{
++ unsigned int enc_bit, mask_bit;
++ u64 msr, mask;
++
++ /* If there is no memory encryption support, use existing mask */
++ if (cpuid_eax(0x80000000) < 0x8000001f)
++ return;
++
++ /* If memory encryption is not enabled, use existing mask */
++ rdmsrl(MSR_K8_SYSCFG, msr);
++ if (!(msr & MSR_K8_SYSCFG_MEM_ENCRYPT))
++ return;
++
++ enc_bit = cpuid_ebx(0x8000001f) & 0x3f;
++ mask_bit = boot_cpu_data.x86_phys_bits;
++
++ /* Increment the mask bit if it is the same as the encryption bit */
++ if (enc_bit == mask_bit)
++ mask_bit++;
++
++ /*
++ * If the mask bit location is below 52, then some bits above the
++ * physical addressing limit will always be reserved, so use the
++ * rsvd_bits() function to generate the mask. This mask, along with
++ * the present bit, will be used to generate a page fault with
++ * PFER.RSV = 1.
++ *
++ * If the mask bit location is 52 (or above), then clear the mask.
++ */
++ mask = (mask_bit < 52) ? rsvd_bits(mask_bit, 51) | PT_PRESENT_MASK : 0;
++
++ kvm_mmu_set_mmio_spte_mask(mask, PT_WRITABLE_MASK | PT_USER_MASK);
++}
++
+ static __init int svm_hardware_setup(void)
+ {
+ int cpu;
+@@ -1352,6 +1393,8 @@ static __init int svm_hardware_setup(void)
+ }
+ }
+
++ svm_adjust_mmio_mask();
++
+ for_each_possible_cpu(cpu) {
+ r = svm_cpu_init(cpu);
+ if (r)
+--
+cgit 1.2-0.3.lf.el7
+
diff --git a/sys-kernel/linux-image-redcore-lts-legacy/linux-image-redcore-lts-legacy-4.19.108-r1.ebuild b/sys-kernel/linux-image-redcore-lts-legacy/linux-image-redcore-lts-legacy-4.19.108-r2.ebuild
index 69ef52ee..325575ec 100644
--- a/sys-kernel/linux-image-redcore-lts-legacy/linux-image-redcore-lts-legacy-4.19.108-r1.ebuild
+++ b/sys-kernel/linux-image-redcore-lts-legacy/linux-image-redcore-lts-legacy-4.19.108-r2.ebuild
@@ -5,7 +5,7 @@ EAPI=6
inherit eutils
-EXTRAVERSION="redcore-lts-legacy-r1"
+EXTRAVERSION="redcore-lts-legacy-r2"
KV_FULL="${PV}-${EXTRAVERSION}"
KV_MAJOR="4.19"
@@ -40,6 +40,7 @@ PATCHES=(
"${FILESDIR}"/"${KV_MAJOR}"-mute-pps_state_mismatch.patch
"${FILESDIR}"/"${KV_MAJOR}"-nouveau-pascal-backlight.patch
"${FILESDIR}"/"${KV_MAJOR}"-radeon_dp_aux_transfer_native-no-ratelimited_debug.patch
+ "${FILESDIR}"/"${KV_MAJOR}"-revert_52918ed5fcf05d97d257f4131e19479da18f5d16.patch
"${FILESDIR}"/"${KV_MAJOR}"-linux-hardened.patch
"${FILESDIR}"/"${KV_MAJOR}"-uksm-linux-hardened.patch
"${FILESDIR}"/"${KV_MAJOR}"-0001-MultiQueue-Skiplist-Scheduler-version-v0.180-linux-hardened.patch
diff --git a/sys-kernel/linux-sources-redcore-lts-legacy/files/4.19-revert_52918ed5fcf05d97d257f4131e19479da18f5d16.patch b/sys-kernel/linux-sources-redcore-lts-legacy/files/4.19-revert_52918ed5fcf05d97d257f4131e19479da18f5d16.patch
new file mode 100644
index 00000000..d64d8efb
--- /dev/null
+++ b/sys-kernel/linux-sources-redcore-lts-legacy/files/4.19-revert_52918ed5fcf05d97d257f4131e19479da18f5d16.patch
@@ -0,0 +1,91 @@
+From a4e761c9f63ae12c5e2fc586b77082fd07e54212 Mon Sep 17 00:00:00 2001
+From: Tom Lendacky <thomas.lendacky@amd.com>
+Date: Thu, 9 Jan 2020 17:42:16 -0600
+Subject: KVM: SVM: Override default MMIO mask if memory encryption is enabled
+
+commit 52918ed5fcf05d97d257f4131e19479da18f5d16 upstream.
+
+The KVM MMIO support uses bit 51 as the reserved bit to cause nested page
+faults when a guest performs MMIO. The AMD memory encryption support uses
+a CPUID function to define the encryption bit position. Given this, it is
+possible that these bits can conflict.
+
+Use svm_hardware_setup() to override the MMIO mask if memory encryption
+support is enabled. Various checks are performed to ensure that the mask
+is properly defined and rsvd_bits() is used to generate the new mask (as
+was done prior to the change that necessitated this patch).
+
+Fixes: 28a1f3ac1d0c ("kvm: x86: Set highest physical address bits in non-present/reserved SPTEs")
+Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com>
+Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
+Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
+Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ arch/x86/kvm/svm.c | 43 +++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 43 insertions(+)
+
+diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
+index 0219693bf08e..3f0565e1a7a8 100644
+--- a/arch/x86/kvm/svm.c
++++ b/arch/x86/kvm/svm.c
+@@ -1298,6 +1298,47 @@ static void shrink_ple_window(struct kvm_vcpu *vcpu)
+ control->pause_filter_count, old);
+ }
+
++/*
++ * The default MMIO mask is a single bit (excluding the present bit),
++ * which could conflict with the memory encryption bit. Check for
++ * memory encryption support and override the default MMIO mask if
++ * memory encryption is enabled.
++ */
++static __init void svm_adjust_mmio_mask(void)
++{
++ unsigned int enc_bit, mask_bit;
++ u64 msr, mask;
++
++ /* If there is no memory encryption support, use existing mask */
++ if (cpuid_eax(0x80000000) < 0x8000001f)
++ return;
++
++ /* If memory encryption is not enabled, use existing mask */
++ rdmsrl(MSR_K8_SYSCFG, msr);
++ if (!(msr & MSR_K8_SYSCFG_MEM_ENCRYPT))
++ return;
++
++ enc_bit = cpuid_ebx(0x8000001f) & 0x3f;
++ mask_bit = boot_cpu_data.x86_phys_bits;
++
++ /* Increment the mask bit if it is the same as the encryption bit */
++ if (enc_bit == mask_bit)
++ mask_bit++;
++
++ /*
++ * If the mask bit location is below 52, then some bits above the
++ * physical addressing limit will always be reserved, so use the
++ * rsvd_bits() function to generate the mask. This mask, along with
++ * the present bit, will be used to generate a page fault with
++ * PFER.RSV = 1.
++ *
++ * If the mask bit location is 52 (or above), then clear the mask.
++ */
++ mask = (mask_bit < 52) ? rsvd_bits(mask_bit, 51) | PT_PRESENT_MASK : 0;
++
++ kvm_mmu_set_mmio_spte_mask(mask, PT_WRITABLE_MASK | PT_USER_MASK);
++}
++
+ static __init int svm_hardware_setup(void)
+ {
+ int cpu;
+@@ -1352,6 +1393,8 @@ static __init int svm_hardware_setup(void)
+ }
+ }
+
++ svm_adjust_mmio_mask();
++
+ for_each_possible_cpu(cpu) {
+ r = svm_cpu_init(cpu);
+ if (r)
+--
+cgit 1.2-0.3.lf.el7
+
diff --git a/sys-kernel/linux-sources-redcore-lts-legacy/linux-sources-redcore-lts-legacy-4.19.108-r1.ebuild b/sys-kernel/linux-sources-redcore-lts-legacy/linux-sources-redcore-lts-legacy-4.19.108-r2.ebuild
index 596521ba..0488a05a 100644
--- a/sys-kernel/linux-sources-redcore-lts-legacy/linux-sources-redcore-lts-legacy-4.19.108-r1.ebuild
+++ b/sys-kernel/linux-sources-redcore-lts-legacy/linux-sources-redcore-lts-legacy-4.19.108-r2.ebuild
@@ -5,7 +5,7 @@ EAPI=6
inherit eutils
-EXTRAVERSION="redcore-lts-legacy-r1"
+EXTRAVERSION="redcore-lts-legacy-r2"
KV_FULL="${PV}-${EXTRAVERSION}"
KV_MAJOR="4.19"
@@ -34,6 +34,7 @@ PATCHES=(
"${FILESDIR}"/"${KV_MAJOR}"-mute-pps_state_mismatch.patch
"${FILESDIR}"/"${KV_MAJOR}"-nouveau-pascal-backlight.patch
"${FILESDIR}"/"${KV_MAJOR}"-radeon_dp_aux_transfer_native-no-ratelimited_debug.patch
+ "${FILESDIR}"/"${KV_MAJOR}"-revert_52918ed5fcf05d97d257f4131e19479da18f5d16.patch
"${FILESDIR}"/"${KV_MAJOR}"-linux-hardened.patch
"${FILESDIR}"/"${KV_MAJOR}"-uksm-linux-hardened.patch
"${FILESDIR}"/"${KV_MAJOR}"-0001-MultiQueue-Skiplist-Scheduler-version-v0.180-linux-hardened.patch
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 09:46:47 +0000