search for: gate_struct

...asm volatile("lldt %w0"::"r" (0)) +/* the cpu gdt accessor */ +#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) /* * This is the ldt that every process will get unless we need @@ -28,8 +27,6 @@ extern struct desc_struct default_ldt[]; extern struct gate_struct idt_table[]; extern struct desc_ptr cpu_gdt_descr[]; -/* the cpu gdt accessor */ -#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) static inline void _set_gate(void *adr, unsigned type, unsigned long func, unsigned dpl, unsigned ist) { @@ -115,7 +112,35 @@ static...

...asm volatile("lldt %w0"::"r" (0)) +/* the cpu gdt accessor */ +#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) /* * This is the ldt that every process will get unless we need @@ -28,8 +27,6 @@ extern struct desc_struct default_ldt[]; extern struct gate_struct idt_table[]; extern struct desc_ptr cpu_gdt_descr[]; -/* the cpu gdt accessor */ -#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) static inline void _set_gate(void *adr, unsigned type, unsigned long func, unsigned dpl, unsigned ist) { @@ -115,7 +112,35 @@ static...

...f7e7099af595 100644 --- a/arch/x86/include/asm/desc_defs.h +++ b/arch/x86/include/asm/desc_defs.h @@ -74,6 +74,13 @@ struct idt_bits { p : 1; } __attribute__((packed)); +struct idt_data { + unsigned int vector; + unsigned int segment; + struct idt_bits bits; + const void *addr; +}; + struct gate_struct { u16 offset_low; u16 segment; diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c index 367eb6a593dd..d3f0c8133300 100644 --- a/arch/x86/kernel/idt.c +++ b/arch/x86/kernel/idt.c @@ -11,13 +11,6 @@ #include <asm/desc.h> #include <asm/hw_irq.h> -struct idt_data { - unsig...

Hi, this is a series of patches that unify the struct desc_struct and friends across x86_64 and i386. As usual, it provides paravirt capabilities as a side-effect for x86_64. I consider the main goal, namely, of unifying the desc_struct, an ongoing effort, being this the beginning. A lot of old code has to be touched to accomplish that. I don't consider this patch ready for inclusion.

Hi, this is a series of patches that unify the struct desc_struct and friends across x86_64 and i386. As usual, it provides paravirt capabilities as a side-effect for x86_64. I consider the main goal, namely, of unifying the desc_struct, an ongoing effort, being this the beginning. A lot of old code has to be touched to accomplish that. I don't consider this patch ready for inclusion.

...st_info *linfo, u64 addr, const void *b, + unsigned bytes) +{ + if (addr + bytes < addr + || !lguest_address_ok(linfo, addr+bytes) + || copy_to_user((void __user *)addr, b, bytes) != 0) + kill_guest(linfo, "bad write address %llx len %u", addr, bytes); +} + +static struct gate_struct *get_idt_table(void) +{ + struct desc_ptr idt; + + asm("sidt %0":"=m" (idt)); + return (void *)idt.address; +} + +static int emulate_insn(struct lguest_vcpu *vcpu) +{ + u8 insn; + unsigned int insnlen = 0, in = 0, shift = 0; + unsigned long physaddr = guest_pa(vcpu->guest, vc...

...st_info *linfo, u64 addr, const void *b, + unsigned bytes) +{ + if (addr + bytes < addr + || !lguest_address_ok(linfo, addr+bytes) + || copy_to_user((void __user *)addr, b, bytes) != 0) + kill_guest(linfo, "bad write address %llx len %u", addr, bytes); +} + +static struct gate_struct *get_idt_table(void) +{ + struct desc_ptr idt; + + asm("sidt %0":"=m" (idt)); + return (void *)idt.address; +} + +static int emulate_insn(struct lguest_vcpu *vcpu) +{ + u8 insn; + unsigned int insnlen = 0, in = 0, shift = 0; + unsigned long physaddr = guest_pa(vcpu->guest, vc...

...asm volatile("lldt %w0"::"r" (0)) +/* the cpu gdt accessor */ +#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) /* * This is the ldt that every process will get unless we need @@ -28,8 +27,6 @@ extern struct desc_struct default_ldt[]; extern struct gate_struct idt_table[]; extern struct desc_ptr cpu_gdt_descr[]; -/* the cpu gdt accessor */ -#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) static inline void _set_gate(void *adr, unsigned type, unsigned long func, unsigned dpl, unsigned ist) { @@ -115,7 +112,19 @@ static...

...asm volatile("lldt %w0"::"r" (0)) +/* the cpu gdt accessor */ +#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) /* * This is the ldt that every process will get unless we need @@ -28,8 +27,6 @@ extern struct desc_struct default_ldt[]; extern struct gate_struct idt_table[]; extern struct desc_ptr cpu_gdt_descr[]; -/* the cpu gdt accessor */ -#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) static inline void _set_gate(void *adr, unsigned type, unsigned long func, unsigned dpl, unsigned ist) { @@ -115,7 +112,19 @@ static...

From: Joerg Roedel <jroedel at suse.de> Hi, here is the fourth version of the SEV-ES Guest Support patches. I addressed the review comments sent to me for the previous version and rebased the code v5.8-rc5. The biggest change in this version is the IST handling code for the #VC handler. I adapted the entry code for the #VC handler to the big pile of entry code changes merged into

From: Joerg Roedel <jroedel at suse.de> Hi, here is the fourth version of the SEV-ES Guest Support patches. I addressed the review comments sent to me for the previous version and rebased the code v5.8-rc5. The biggest change in this version is the IST handling code for the #VC handler. I adapted the entry code for the #VC handler to the big pile of entry code changes merged into

From: Joerg Roedel <jroedel at suse.de> Hi, here is a new version of the SEV-ES Guest Support patches for x86. The previous versions can be found as a linked list starting here: https://lore.kernel.org/lkml/20200824085511.7553-1-joro at 8bytes.org/ I updated the patch-set based on ther review comments I got and the discussions around it. Another important change is that the early IDT

From: Joerg Roedel <jroedel at suse.de> Hi, here is a new version of the SEV-ES Guest Support patches for x86. The previous versions can be found as a linked list starting here: https://lore.kernel.org/lkml/20200824085511.7553-1-joro at 8bytes.org/ I updated the patch-set based on ther review comments I got and the discussions around it. Another important change is that the early IDT

Hi, here is the next version of changes to enable Linux to run as an SEV-ES guest. The code was rebased to v5.7-rc3 and got a fair number of changes since the last version. What is SEV-ES ============== SEV-ES is an acronym for 'Secure Encrypted Virtualization - Encrypted State' and means a hardware feature of AMD processors which hides the register state of VCPUs to the hypervisor by

Hi, here is the next version of changes to enable Linux to run as an SEV-ES guest. The code was rebased to v5.7-rc3 and got a fair number of changes since the last version. What is SEV-ES ============== SEV-ES is an acronym for 'Secure Encrypted Virtualization - Encrypted State' and means a hardware feature of AMD processors which hides the register state of VCPUs to the hypervisor by

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths