search for: init_idt_data

From: Joerg Roedel <jroedel at suse.de> Move these two functions from kernel/idt.c to include/asm/desc.h: * init_idt_data() * idt_init_desc() These functions are needed to setup IDT entries very early and need to be called from head64.c. To be usable this early these functions need to be compiled without instrumentation and the stack-protector feature. These features need to be kept enabled for kernel/idt.c, so head...

...+), 8 deletions(-) diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c index b920f2352df5..367eb6a593dd 100644 --- a/arch/x86/kernel/idt.c +++ b/arch/x86/kernel/idt.c @@ -205,18 +205,24 @@ idt_setup_from_table(gate_desc *idt, const struct idt_data *t, int size, bool sy } } +static void init_idt_data(struct idt_data *data, unsigned int n, + const void *addr) +{ + BUG_ON(n > 0xFF); + + memset(data, 0, sizeof(*data)); + data->vector = n; + data->addr = addr; + data->segment = __KERNEL_CS; + data->bits.type = GATE_INTERRUPT; + data->bits.p = 1; +} + static __init void set_in...

...+), 8 deletions(-) diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c index 34fcc58b81b5..c19773174221 100644 --- a/arch/x86/kernel/idt.c +++ b/arch/x86/kernel/idt.c @@ -205,18 +205,24 @@ idt_setup_from_table(gate_desc *idt, const struct idt_data *t, int size, bool sy } } +static void init_idt_data(struct idt_data *data, unsigned int n, + const void *addr) +{ + BUG_ON(n > 0xFF); + + memset(data, 0, sizeof(*data)); + data->vector = n; + data->addr = addr; + data->segment = __KERNEL_CS; + data->bits.type = GATE_INTERRUPT; + data->bits.p = 1; +} + static __init void set_in...

On Mon, Aug 24, 2020 at 10:54:37AM +0200, Joerg Roedel wrote: > +#ifdef CONFIG_AMD_MEM_ENCRYPT > +static void set_early_idt_handler(gate_desc *idt, int n, void *handler) > +{ > + struct idt_data data; > + gate_desc desc; > + > + init_idt_data(&data, n, handler); > + idt_init_desc(&desc, &data); > + native_write_idt_entry(idt, n, &desc); > +} > +#endif > + > +static struct desc_ptr early_idt_descr __initdata = { > + .size = IDT_TABLE_SIZE - 1, > + .address = 0 /* Needs physical address of idt_tabl...

On Mon, Aug 24, 2020 at 10:54:37AM +0200, Joerg Roedel wrote: > +#ifdef CONFIG_AMD_MEM_ENCRYPT > +static void set_early_idt_handler(gate_desc *idt, int n, void *handler) > +{ > + struct idt_data data; > + gate_desc desc; > + > + init_idt_data(&data, n, handler); > + idt_init_desc(&desc, &data); > + native_write_idt_entry(idt, n, &desc); > +} > +#endif > + > +static struct desc_ptr early_idt_descr __initdata = { > + .size = IDT_TABLE_SIZE - 1, > + .address = 0 /* Needs physical address of idt_tabl...

....h> /* * Manage page tables very early on. @@ -540,10 +541,29 @@ static struct desc_ptr bringup_idt_descr = { .address = 0, /* Set at runtime */ }; +#ifdef CONFIG_AMD_MEM_ENCRYPT +static void set_bringup_idt_handler(int n, void *handler) +{ + struct idt_data data; + gate_desc desc; + + init_idt_data(&data, n, handler); + idt_init_desc(&desc, &data); + native_write_idt_entry(bringup_idt_table, n, &desc); +} +#endif + /* This runs while still in the direct mapping */ static void startup_64_load_idt(unsigned long physbase) { struct desc_ptr *desc = fixup_pointer(&bringup_...

...t(n, system_vectors))) set_intr_gate(n, addr); } + +void __init early_idt_setup_early_handler(unsigned long physaddr) +{ + gate_desc *idt; + int i; + + idt = fixup_pointer(idt_table, physaddr); + + for (i = 0; i < NUM_EXCEPTION_VECTORS; i++) { + struct idt_data data; + gate_desc desc; + + init_idt_data(&data, i, early_idt_handler_array[i]); + idt_init_desc(&desc, &data); + native_write_idt_entry(idt, i, &desc); + } +} + +void early_load_idt(void) +{ + load_idt(&idt_descr); +} -- 2.28.0

...lt;asm/sev-es.h> struct idt_data { unsigned int vector; @@ -408,3 +409,38 @@ void early_load_idt(void) { load_idt(&idt_descr); } + +#ifdef CONFIG_AMD_MEM_ENCRYPT +static void set_early_idt_handler(gate_desc *idt, int n, void *handler) +{ + struct idt_data data; + gate_desc desc; + + init_idt_data(&data, n, handler); + idt_init_desc(&desc, &data); + native_write_idt_entry(idt, n, &desc); +} +#endif + +static struct desc_ptr early_idt_descr __initdata = { + .size = IDT_TABLE_SIZE - 1, + .address = 0 /* Needs physical address of idt_table - initialized at runtime. */, +}; + +v...

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

Hi, here is the first public post of the patch-set to enable Linux to run under SEV-ES enabled hypervisors. The code is mostly feature-complete, but there are still a couple of bugs to fix. Nevertheless, given the size of the patch-set, I think it is about time to ask for initial feedback of the changes that come with it. To better understand the code here is a quick explanation of SEV-ES first.

Hi, here is the first public post of the patch-set to enable Linux to run under SEV-ES enabled hypervisors. The code is mostly feature-complete, but there are still a couple of bugs to fix. Nevertheless, given the size of the patch-set, I think it is about time to ask for initial feedback of the changes that come with it. To better understand the code here is a quick explanation of SEV-ES first.

From: Joerg Roedel <jroedel at suse.de> Hi, here is the new version of the SEV-ES client enabling patch-set. It is based on the latest tip/master branch and contains the necessary changes. In particular those ar: - Enabling CR4.FSGSBASE early on supported processors so that early #VC exceptions on APs can be handled. - Add another patch (patch 1) to fix a KVM frame-size build

From: Joerg Roedel <jroedel at suse.de> Hi, here is a rebased version of the latest SEV-ES patches. They are now based on latest tip/master instead of upstream Linux and include the necessary changes. Changes to v4 are in particular: - Moved early IDT setup code to idt.c, because the idt_descr and the idt_table are now static - This required to make stack protector work early (or