search for: reserve_mem

1) Example code: old libc headers don't have SIOCBRADDIF, and old zlibs don't have gzdirect() -- it's a sanity check anyway. 2) Some people don't build in their source directories, so .config isn't there (thanks to Tony Breeds <tony@bakeyournoodle.com>). 3) Point out that guest and host kernel are usually the same. 4) Set the "no checksum" option on the

1) Example code: old libc headers don't have SIOCBRADDIF, and old zlibs don't have gzdirect() -- it's a sanity check anyway. 2) Some people don't build in their source directories, so .config isn't there (thanks to Tony Breeds <tony@bakeyournoodle.com>). 3) Point out that guest and host kernel are usually the same. 4) Set the "no checksum" option on the

...tables.c @@ -53,6 +53,17 @@ * page. */ #define SWITCHER_PGD_INDEX (PTRS_PER_PGD - 1) +/* For PAE we need the PMD index as well. We use the last 2MB, so we + * will need the last pmd entry of the last pmd page. */ +#ifdef CONFIG_X86_PAE +#define SWITCHER_PMD_INDEX (PTRS_PER_PMD - 1) +#define RESERVE_MEM 2U +#define CHECK_GPGD_MASK _PAGE_PRESENT +#else +#define RESERVE_MEM 4U +#define CHECK_GPGD_MASK _PAGE_TABLE +#endif + /* We actually need a separate PTE page for each CPU. Remember that after the * Switcher code itself comes two pages for each CPU, and we don't want this * CPU'...

...tables.c @@ -53,6 +53,17 @@ * page. */ #define SWITCHER_PGD_INDEX (PTRS_PER_PGD - 1) +/* For PAE we need the PMD index as well. We use the last 2MB, so we + * will need the last pmd entry of the last pmd page. */ +#ifdef CONFIG_X86_PAE +#define SWITCHER_PMD_INDEX (PTRS_PER_PMD - 1) +#define RESERVE_MEM 2U +#define CHECK_GPGD_MASK _PAGE_PRESENT +#else +#define RESERVE_MEM 4U +#define CHECK_GPGD_MASK _PAGE_TABLE +#endif + /* We actually need a separate PTE page for each CPU. Remember that after the * Switcher code itself comes two pages for each CPU, and we don't want this * CPU'...

..._descr); -// asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_PDA) : "memory"); + /* Set up per-cpu descriptor (pointing to master area) */ + asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_DS) : "memory"); reserve_top_address(lguest_data.reserve_mem);

..._descr); -// asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_PDA) : "memory"); + /* Set up per-cpu descriptor (pointing to master area) */ + asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_DS) : "memory"); reserve_top_address(lguest_data.reserve_mem);

...-468,7 +465,6 @@ __init void lguest_init(void) /* We use top of mem for initial pagetables. */ init_pg_tables_end = __pa(pg0); - load_gdt(&early_gdt_descr); asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_DS) : "memory"); reserve_top_address(lguest_data.reserve_mem);

...-468,7 +465,6 @@ __init void lguest_init(void) /* We use top of mem for initial pagetables. */ init_pg_tables_end = __pa(pg0); - load_gdt(&early_gdt_descr); asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_DS) : "memory"); reserve_top_address(lguest_data.reserve_mem);

.../* We check here so we can simply copy_to_user/from_user */ @@ -148,6 +156,7 @@ static void initialize(struct lguest *lg || get_user(lg->noirq_end, &lg->lguest_data->noirq_end) /* We reserve the top pgd entry. */ || put_user(4U*1024*1024, &lg->lguest_data->reserve_mem) + || put_user(tsc_speed, &lg->lguest_data->tsc_khz) || put_user(lg->guestid, &lg->lguest_data->guestid)) kill_guest(lg, "bad guest page %p", lg->lguest_data); =================================================================== --- a/include/asm-i3...

.../* We check here so we can simply copy_to_user/from_user */ @@ -148,6 +156,7 @@ static void initialize(struct lguest *lg || get_user(lg->noirq_end, &lg->lguest_data->noirq_end) /* We reserve the top pgd entry. */ || put_user(4U*1024*1024, &lg->lguest_data->reserve_mem) + || put_user(tsc_speed, &lg->lguest_data->tsc_khz) || put_user(lg->guestid, &lg->lguest_data->guestid)) kill_guest(lg, "bad guest page %p", lg->lguest_data); =================================================================== --- a/include/asm-i3...

...ata), 0, 0); + strncpy(boot_command_line, boot->cmdline, COMMAND_LINE_SIZE); + + /* We use top of mem for initial pagetables. */ + init_pg_tables_end = __pa(pg0); + + asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_DS) : "memory"); + + reserve_top_address(lguest_data.reserve_mem); + + cpu_detect(&new_cpu_data); + /* Need this before paging_init. */ + set_bit(X86_FEATURE_PGE, new_cpu_data.x86_capability); + /* Math is always hard! */ + new_cpu_data.hard_math = 1; + +#ifdef CONFIG_X86_MCE + mce_disabled = 1; +#endif + +#ifdef CONFIG_ACPI + acpi_disabled = 1; + acpi_ht =...

...ata), 0, 0); + strncpy(boot_command_line, boot->cmdline, COMMAND_LINE_SIZE); + + /* We use top of mem for initial pagetables. */ + init_pg_tables_end = __pa(pg0); + + asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_DS) : "memory"); + + reserve_top_address(lguest_data.reserve_mem); + + cpu_detect(&new_cpu_data); + /* Need this before paging_init. */ + set_bit(X86_FEATURE_PGE, new_cpu_data.x86_capability); + /* Math is always hard! */ + new_cpu_data.hard_math = 1; + +#ifdef CONFIG_X86_MCE + mce_disabled = 1; +#endif + +#ifdef CONFIG_ACPI + acpi_disabled = 1; + acpi_ht =...

As promised to Andrew, and with much thanks to Andi Kleen for feedback, this is the new series of lguest patches. Main change is the move to drivers/lguest (for future non-i386 expansion), but lots of cleanups driven by Andi's feedback and the documentation effort (which made me examine every line of code). It's not perfect, but it's definitely useful. Cheers, Rusty. List of

As promised to Andrew, and with much thanks to Andi Kleen for feedback, this is the new series of lguest patches. Main change is the move to drivers/lguest (for future non-i386 expansion), but lots of cleanups driven by Andi's feedback and the documentation effort (which made me examine every line of code). It's not perfect, but it's definitely useful. Cheers, Rusty. List of

The following patches are the latest update of the TSC and hrtimer patches I posted on 29/03. Rusty's original TSC patch has been resynced to the latest lguest repo, as has the hrtimer patch, which also incorporates feedback from Jeremy & Rusty: - Change clock event hrtimer to absolute time. 'now' is captured in the host during the hypercall. - Propagate -ETIME back to the

The following patches are the latest update of the TSC and hrtimer patches I posted on 29/03. Rusty's original TSC patch has been resynced to the latest lguest repo, as has the hrtimer patch, which also incorporates feedback from Jeremy & Rusty: - Change clock event hrtimer to absolute time. 'now' is captured in the host during the hypercall. - Propagate -ETIME back to the

...emory. */ if (get_user(cpu->lg->kernel_address, - &cpu->lg->lguest_data->kernel_address) - /* We tell the Guest that it can't use the top 4MB of virtual - * addresses used by the Switcher. */ - || put_user(4U*1024*1024, &cpu->lg->lguest_data->reserve_mem) - || put_user(cpu->lg->pgdirs[0].gpgdir, &cpu->lg->lguest_data->pgdir)) + &cpu->lg->lguest_data->kernel_address) + /* We tell the Guest that it can't use the top 2 or 4 MB + * of virtual addresses used by the Switcher. */ + || put_user(reserve_mb * 1024...

...emory. */ if (get_user(cpu->lg->kernel_address, - &cpu->lg->lguest_data->kernel_address) - /* We tell the Guest that it can't use the top 4MB of virtual - * addresses used by the Switcher. */ - || put_user(4U*1024*1024, &cpu->lg->lguest_data->reserve_mem) - || put_user(cpu->lg->pgdirs[0].gpgdir, &cpu->lg->lguest_data->pgdir)) + &cpu->lg->lguest_data->kernel_address) + /* We tell the Guest that it can't use the top 2 or 4 MB + * of virtual addresses used by the Switcher. */ + || put_user(reserve_mb * 1024...

The netfilter code had very good documentation: the Netfilter Hacking HOWTO. Noone ever read it. So this time I'm trying something different, using a bit of Knuthiness. Start with drivers/lguest/README. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- Documentation/lguest/extract | 58 +++++++++++++++++++++++++++++++++ Documentation/lguest/lguest.c | 9

The netfilter code had very good documentation: the Netfilter Hacking HOWTO. Noone ever read it. So this time I'm trying something different, using a bit of Knuthiness. Start with drivers/lguest/README. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- Documentation/lguest/extract | 58 +++++++++++++++++++++++++++++++++ Documentation/lguest/lguest.c | 9