search for: cpu_swapg

...u_write_cr3 = { 0x0f, 0x22, 0xdf }, // mov %rdi, %cr3 > .irq_restore_fl = { 0x57, 0x9d }, // push %rdi; popfq > .cpu_wbinvd = { 0x0f, 0x09 }, // wbinvd > @@ -50,19 +45,11 @@ static const struct patch_xxl patch_data_xxl = { > 0x48, 0x0f, 0x07 }, // swapgs; sysretq > .cpu_swapgs = { 0x0f, 0x01, 0xf8 }, // swapgs > .mov64 = { 0x48, 0x89, 0xf8 }, // mov %rdi, %rax > -# else > - .mmu_write_cr3 = { 0x0f, 0x22, 0xd8 }, // mov %eax, %cr3 > - .irq_restore_fl = { 0x50, 0x9d }, // push %eax; popf > - .cpu_iret = { 0xcf }, // iret > -# endif I was lookin...

...u_write_cr3 = { 0x0f, 0x22, 0xdf }, // mov %rdi, %cr3 > .irq_restore_fl = { 0x57, 0x9d }, // push %rdi; popfq > .cpu_wbinvd = { 0x0f, 0x09 }, // wbinvd > @@ -50,19 +45,11 @@ static const struct patch_xxl patch_data_xxl = { > 0x48, 0x0f, 0x07 }, // swapgs; sysretq > .cpu_swapgs = { 0x0f, 0x01, 0xf8 }, // swapgs > .mov64 = { 0x48, 0x89, 0xf8 }, // mov %rdi, %rax > -# else > - .mmu_write_cr3 = { 0x0f, 0x22, 0xd8 }, // mov %eax, %cr3 > - .irq_restore_fl = { 0x50, 0x9d }, // push %eax; popf > - .cpu_iret = { 0xcf }, // iret > -# endif I was lookin...

The long term plan has been to replace Xen PV guests by PVH. The first victim of that plan are now 32-bit PV guests, as those are used only rather seldom these days. Xen on x86 requires 64-bit support and with Grub2 now supporting PVH officially since version 2.04 there is no need to keep 32-bit PV guest support alive in the Linux kernel. Additionally Meltdown mitigation is not available in the

...x22, 0xdf }, // mov %rdi, %cr3 >> .irq_restore_fl = { 0x57, 0x9d }, // push %rdi; popfq >> .cpu_wbinvd = { 0x0f, 0x09 }, // wbinvd >> @@ -50,19 +45,11 @@ static const struct patch_xxl patch_data_xxl = { >> 0x48, 0x0f, 0x07 }, // swapgs; sysretq >> .cpu_swapgs = { 0x0f, 0x01, 0xf8 }, // swapgs >> .mov64 = { 0x48, 0x89, 0xf8 }, // mov %rdi, %rax >> -# else >> - .mmu_write_cr3 = { 0x0f, 0x22, 0xd8 }, // mov %eax, %cr3 >> - .irq_restore_fl = { 0x50, 0x9d }, // push %eax; popf >> - .cpu_iret = { 0xcf }, // iret >&g...

...virt_patch.c @@ -26,14 +26,10 @@ struct patch_xxl { const unsigned char mmu_read_cr3[3]; const unsigned char mmu_write_cr3[3]; const unsigned char irq_restore_fl[2]; -# ifdef CONFIG_X86_64 const unsigned char cpu_wbinvd[2]; const unsigned char cpu_usergs_sysret64[6]; const unsigned char cpu_swapgs[3]; const unsigned char mov64[3]; -# else - const unsigned char cpu_iret[1]; -# endif }; static const struct patch_xxl patch_data_xxl = { @@ -42,7 +38,6 @@ static const struct patch_xxl patch_data_xxl = { .irq_save_fl = { 0x9c, 0x58 }, // pushf; pop %[re]ax .mmu_read_cr2 = { 0x0f, 0x20...

...virt_patch.c @@ -26,14 +26,10 @@ struct patch_xxl { const unsigned char mmu_read_cr3[3]; const unsigned char mmu_write_cr3[3]; const unsigned char irq_restore_fl[2]; -# ifdef CONFIG_X86_64 const unsigned char cpu_wbinvd[2]; const unsigned char cpu_usergs_sysret64[6]; const unsigned char cpu_swapgs[3]; const unsigned char mov64[3]; -# else - const unsigned char cpu_iret[1]; -# endif }; static const struct patch_xxl patch_data_xxl = { @@ -42,7 +38,6 @@ static const struct patch_xxl patch_data_xxl = { .irq_save_fl = { 0x9c, 0x58 }, // pushf; pop %[re]ax .mmu_read_cr2 = { 0x0f, 0x20...

The long term plan has been to replace Xen PV guests by PVH. The first victim of that plan are now 32-bit PV guests, as those are used only rather seldom these days. Xen on x86 requires 64-bit support and with Grub2 now supporting PVH officially since version 2.04 there is no need to keep 32-bit PV guest support alive in the Linux kernel. Additionally Meltdown mitigation is not available in the

The long term plan has been to replace Xen PV guests by PVH. The first victim of that plan are now 32-bit PV guests, as those are used only rather seldom these days. Xen on x86 requires 64-bit support and with Grub2 now supporting PVH officially since version 2.04 there is no need to keep 32-bit PV guest support alive in the Linux kernel. Additionally Meltdown mitigation is not available in the

A lot of cleanup after removal of 32-bit Xen PV guest support in paravirt code. Changes in V4: - dropped patches 1-3, as already committed - addressed comments to V3 - added new patches 5+6 Changes in V3: - addressed comments to V2 - split patch 1 into 2 patches - new patches 3 and 7 Changes in V2: - rebase to 5.8 kernel - addressed comments to V1 - new patches 3 and 4 Juergen Gross (6):